KR20140108057A - Cooling apparatus and controlling method thereof - Google Patents

Abstract

The present invention relates to a refrigerator including: a carbonated water tank to store carbonated water; a water tank to supply purified water to the carbonated water tank; a carbon dioxide cylinder to supply carbon dioxide to the carbonated water tank; a carbon dioxide supplying valve to control the supply of the carbon dioxide into the carbonated water tank; an input unit given a selection of the carbonated water from a user; and a control unit to supply the purified water to the carbonated water tank and generating the carbonated water by repeating the opening and closing of the carbon dioxide supplying valve when the supply of the purified water is finished. The control unit is capable of altering the opening number of the carbon dioxide valve in accordance to the concentration of the carbonated water selected by the user. Thereby, the refrigerator is capable of selectively providing purified water and carbonated water. Moreover, in accordance to the user′s choice, the concentration of the carbonated water can be altered.

Description

{COOLING APPARATUS AND CONTROLLING METHOD THEREOF}

The present invention relates to a refrigerator and a control method thereof, and more particularly, to a refrigerator including a carbonated water producing device and a control method thereof.

Generally, a refrigerator is a household appliance that stores a food in a fresh state by having a storage room for storing food and a cooler for supplying cool air to the storage room. In response to a user's request, the refrigerator may be provided with an ice maker for generating ice and a dispenser for extracting water or ice from the outside without opening the door.

There is a demand for users to receive not only purified water or ice from the refrigerator but also processed beverage. However, the conventional refrigerator only provides purified water or ice to the user and fails to provide the processed beverage.

One aspect of the present invention is to provide a refrigerator which can selectively receive purified water and carbonated water, and can select the concentration of carbonated water according to a user's taste.

A refrigerator according to one aspect of the present invention includes a carbonated water tank for storing carbonated water, a water tank for supplying purified water to the carbonated water tank, a carbon dioxide cylinder for supplying carbon dioxide to the carbonated water tank, a carbon dioxide supplying unit for controlling the supply of carbon dioxide to the carbonated water tank A control unit for supplying the purified water to the carbonated water tank and repeating the opening and closing of the carbonated carbon dioxide supply valve when the purified water is supplied, The controller may change the number of times the CO 2 valve is opened according to the concentration of the carbonated water selected by the user.

In addition, the control unit may increase the number of times the carbon dioxide supply valve is opened as the concentration of carbonated water selected by the user is high.

In addition, the control unit may increase the closing time of the carbon dioxide gas as the number of opening of the carbon dioxide valve increases.

According to another aspect of the present invention, a refrigerator includes a carbonated water tank for storing carbonated water, a water tank for supplying purified water to the carbonated water tank, a carbon dioxide cylinder for supplying carbon dioxide to the carbonated water tank, an input unit for selecting the concentration of the carbonated water, A display unit for displaying the concentration of the carbonic acid water selected by the user; a supply unit for supplying the purified water to the carbonated water tank, supplying the carbon dioxide at least once when the purified water is supplied, and supplying the carbon dioxide to dissolve the supplied carbon dioxide The control unit may vary the number of times the carbon dioxide is supplied according to the concentration of the carbonated water selected by the user.

Further, the refrigerator may further include a display unit for displaying the concentration of the carbonated water selected by the user, and the controller may control the display unit to display the concentration of the selected carbonated water.

In addition, at the time of manufacturing the carbonated water, the control unit can intermittently supply the carbon dioxide to the carbonated water tank by repeating the supply of the carbon dioxide and the stop of the supply of the carbon dioxide.

In addition, the controller may increase the number of times the carbon dioxide is supplied as the concentration of the carbonated water selected by the user is high.

Also, the control unit may increase the time for stopping the supply of the carbon dioxide as the number of times of supply of the carbon dioxide increases.

Also, the controller may supply the carbon dioxide at least once within 4 to 8 seconds according to the concentration of the carbonated water selected by the user.

In addition, the control unit may stop the supply of the supplied carbon dioxide at least once for 2 minutes to 18 minutes after supplying the carbon dioxide.

A control method of a refrigerator according to an aspect of the present invention is a control method of a refrigerator including a carbonated water tank for generating and storing carbonated water, the method comprising: selecting a concentration of the carbonated water from a user; supplying the purified water to the carbonated water tank; Supplying at least once the carbon dioxide to the carbonated water tank once the supply of the purified water is completed and stopping the supply of the carbon dioxide at least once to dissolve the supplied carbon dioxide, And varying the number of times of supplying the carbon dioxide according to the concentration of the carbonated water.

The method may further include displaying the concentration of the selected carbonic acid water.

In addition, the number of times of supply of the carbon dioxide is varied, as the concentration of the selected carbonated water is higher, the number of times of supply of the carbon dioxide can be increased.

In addition, the supply of the carbon dioxide can be stopped at least once, as the supply of the carbon dioxide increases, the supply of the carbon dioxide can be interrupted.

In addition, the supply of the carbon dioxide at least once may supply the carbon dioxide at least once within 4 to 8 seconds depending on the concentration of the carbonated water selected by the user.

Also, stopping the supply of carbon dioxide at least once can stop the supply of the supplied carbon dioxide at least once for 2 to 18 minutes after supplying the carbon dioxide.

According to an aspect of the present invention, a refrigerator can selectively provide purified water and carbonated water to a user, and the user can provide carbonated water having different concentrations according to his or her choice.

1 is a view showing the appearance of a refrigerator according to an embodiment of the present invention.
2 is a view illustrating the interior of a refrigerator according to an embodiment of the present invention.
3 is a view showing an assembled structure of a carbonated water producing module of a refrigerator according to an embodiment of the present invention.
4 is a view showing a state in which a cover of a carbonated water producing module of a refrigerator is separated according to an embodiment of the present invention.
5 is a view illustrating a process of manufacturing and discharging carbonated water in a refrigerator according to an embodiment of the present invention.
6 is a block diagram showing a control flow of a refrigerator according to an embodiment of the present invention.
7 is a view showing a control panel of a refrigerator according to an embodiment of the present invention.
FIG. 8 is a diagram illustrating that a refrigerator according to an embodiment of the present invention receives an operation command related to manufacturing carbonated water from a user.
9A and 9B are views schematically showing a method of manufacturing a carbonated water according to an embodiment of the present invention.
10 is a flowchart showing that a refrigerator according to an embodiment of the present invention starts manufacturing carbonated water by a user's carbonated water production command.
FIG. 11 is a flowchart showing the start of carbonated water generation by determining whether or not the refrigerator according to an embodiment of the present invention is producing carbonated water.
12 is a view illustrating a method of manufacturing carbonated water by a refrigerator according to an embodiment of the present invention.
13A and 13B are flowcharts showing a method of producing carbonated water according to the manufacturing method shown in FIG.
FIG. 14 is a flowchart illustrating another method of manufacturing carbonated water by a refrigerator according to an embodiment of the present invention.
FIG. 15 is a flowchart showing another method of manufacturing carbonated water by a refrigerator according to an embodiment of the present invention.
FIGS. 14A and 14B are flowcharts showing control of a refrigerator according to an embodiment of the present invention when an unusual situation occurs during carbonated water production.
FIGS. 15A to 15C are flowcharts showing the refrigerator according to an embodiment of the present invention re-supplying carbon dioxide to a carbonated water tank. FIG.
FIG. 16 is a flowchart showing the refrigerator sensing the pressure of carbon dioxide according to an embodiment of the present invention.
17 is a view schematically showing the discharge of carbonated water by the refrigerator according to the embodiment of the present invention.
18 is a view showing that the refrigerator discharges carbonated water according to an embodiment of the present invention.

The embodiments described herein and the configurations shown in the drawings are merely exemplary embodiments of the present invention, and various modifications may be made at the time of filing of the present application to replace the embodiments and drawings of the present specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an appearance of a refrigerator according to an embodiment of the present invention, and FIG. 2 is a perspective view illustrating an inside of a refrigerator according to an embodiment of the present invention.

1 and 2, a refrigerator 1 according to an embodiment of the present invention includes a main body 10, storage rooms 20 and 30 formed in the main body 10, (Not shown) for supplying a cold air.

The main body 10 includes an inner surface forming the storage rooms 20 and 30, an outer surface coupled to the outside of the inner surface to form an outer appearance of the refrigerator, and a heat insulating material disposed between the inner and outer surfaces to insulate the storage rooms 20 and 30 .

The storage rooms 20 and 30 can be partitioned into an upper refrigerator compartment 20 and a lower refrigerator compartment 30 by an intermediate partition 11. The refrigerator compartment 20 can be kept at a temperature of about 3 ° C to refrigerate the food and the freezer compartment 30 can be kept at a temperature of about minus 18.5 ° C to freeze and store the food. The refrigerator compartment 20 may be provided with a shelf 23 on which food can be placed and at least one storage box 27 for enclosing the food.

An ice making chamber 81 capable of producing ice can be formed in the upper corner of the refrigerating chamber 20 so as to be partitioned from the refrigerating chamber 20 by the ice making chamber case 82. The ice making chamber 81 may be provided with an ice making device 80 including an ice making tray for making ice, an ice bucket for storing ice made by the ice making tray, and the like.

Meanwhile, the refrigerating chamber 20 may be provided with a water tank 70 capable of storing water. The water tank 70 may be provided between the plurality of storage boxes 27 as shown in FIG. 2. However, the present invention is not limited thereto, and the water in the water tank 70 may be cooled by the cold air inside the refrigerating chamber 20 It may be provided only inside the refrigerating chamber 20 so as to be cooled.

The water tank 70 may be connected to an external water source 40 (Fig. 5) such as water, and may store an integer purified through the water filter 50 (Fig. 5). The water supply pipe connecting the external water supply source 40 and the water tank 70 may be provided with a flow path switching valve 60 and water may be supplied to the ice making device 80 through the flow path switching valve 50 .

The refrigerator compartment 20 and the freezer compartment 30 each have a front face opened to allow food to be delivered and received. The opened front face of the refrigerator compartment 20 includes a pair of rotary doors 21 and 22 hinged to the main body 10, And the opened front face of the freezing chamber 30 can be opened and closed by the sliding door 31 slidable with respect to the main body 10. [ On the rear surface of the refrigerating compartment doors 21 and 22, a door guard 24 capable of storing food can be provided.

When the refrigerating compartment doors 21 and 22 are closed at the rear edge of the refrigerating compartment doors 21 and 22, the refrigerating compartment 20 is closed by closing the spaces between the refrigerating compartment doors 21 and 22 and the main body 10 A gasket 28 may be provided. When any one of the refrigerating compartment doors 21 and 22 is closed in the refrigerating compartment door 21 of one of the refrigerating compartment doors 21 and 22 to seal the space between the refrigerating compartment door 21 and the refrigerating compartment door 22, And a rotating bar 26 for interrupting the cool air of the refrigerator.

The dispenser 90 may be provided on any one of the refrigerating chamber doors 21 of the refrigerating chamber doors 21 and 22 so as to extract purified water, carbonated water, or ice from the outside without opening the refrigerating chamber door 21.

The dispenser 90 includes a water take-in space 91 through which a water or ice can be taken by inserting a container such as a cup, a dispenser lever 93 capable of operating the dispenser 90 to discharge purified water, Or a dispenser nozzle 95 through which carbonated water is discharged. The user can input the carbonated water discharge command or the purified water discharge command to the refrigerator 1 by pressing the dispenser lever 93. By stopping the pressurizing of the dispenser lever 93, the user can input the carbonated water discharge end command or the purified water discharge end command can do. That is, when the dispenser lever 93 is pressed, the refrigerator 1 discharges purified water or carbonated water until pressurization of the dispenser lever 93 is completed.

The dispenser 90 may include an ice guide passage 94 connecting the ice making device 80 and the water intake space 91 so that ice produced in the ice making device 80 is discharged into the water intake space 91 .

The control panel 300 receives the operation command of the refrigerator 1 from the user and displays the operation information of the refrigerator 1 to the user. The control panel will be described in detail below.

On the other hand, a carbonated water producing module 100 for producing carbonated water may be mounted on the rear surface of the refrigerating chamber door 21 provided with the dispenser 90 of the refrigerator 1 according to the embodiment of the present invention. The carbonate water producing module 100 will be described in detail below.

FIG. 3 is a view showing an assembly structure of a carbonated water producing module of a refrigerator according to an embodiment of the present invention, and FIG. 4 is a view illustrating a state in which a cover of a carbonated water producing module of a refrigerator according to an embodiment of the present invention is separated FIG. 5 is a view illustrating a process of manufacturing and discharging carbonated water of a refrigerator according to an embodiment of the present invention. Referring to FIG.

The carbonated water producing module 100 is for producing carbonated water in the refrigerator 1, and includes a carbon dioxide cylinder 120 in which high-pressure carbon dioxide is stored as shown in FIGS. 3 to 5, A carbonated water tank 110 for storing and storing carbonated water and a storage space 151, 152 and 153 for storing a carbon dioxide cylinder 120 and a carbonated water tank 110 and connected to the rear surface of the refrigerator compartment door 21, (140), an integral valve assembly (130) for controlling the flow of purified water or carbonated water.

The carbon dioxide cylinder 120 may store carbon dioxide at a high pressure of approximately 45 to 60 bar. The carbon dioxide cylinder 120 is mounted on the cylinder connector 157 of the module case 140 and can be accommodated in the lower accommodating space 153 of the module case 140.

Carbon dioxide in the carbon dioxide cylinder 120 may be supplied to the carbonated water tank 110 through the carbon dioxide supply passage 200 connecting the carbon dioxide cylinder 120 and the carbonated water tank 110.

The carbon dioxide supply passage 200 is provided with a carbon dioxide regulator 201 for regulating the pressure of carbon dioxide, a pressure sensor 204 for sensing the discharge pressure of carbon dioxide, a carbon dioxide supply valve 202 for opening and closing the carbon dioxide supply passage 200, A carbon dioxide backflow prevention valve 203 for preventing backflow may be provided.

The carbon dioxide regulator 201 may be provided at a carbon dioxide outlet of the carbon dioxide cylinder 120 to control the pressure of the carbon dioxide discharged from the carbon dioxide cylinder 120. As a remedy, the carbon dioxide regulator 201 can lower the pressure of the carbon dioxide supplied to the carbonated water tank 110 to approximately 8.5 bar.

The pressure sensor 204 is provided at the carbon dioxide outlet of the carbon dioxide regulator 201. Further, the pressure sensor 204 senses the pressure of the carbon dioxide decompressed by the carbon dioxide regulator 201, and outputs a signal corresponding to the sensed pressure. The carbon dioxide pressure sensor 204 may employ a pressure switch that outputs a corresponding signal when the pressure of the carbon dioxide decompressed by the carbon dioxide regulator 201 drops below a predetermined reference pressure.

The carbonated water tank 110 may mix the carbon dioxide supplied from the carbon dioxide cylinder 120 and the purified water supplied from the water tank 70 to produce carbonated water and store the manufactured carbonated water.

The carbonated water tank 110 is provided with a purified water supply passage 210 for receiving purified water from the water tank 70 in addition to the carbon dioxide supply passage 200 and a carbonated water discharge passage 230 for discharging the produced carbonated water to the dispenser nozzle 95 And an exhaust flow path 250 for exhausting carbon dioxide remaining in the carbonated water tank 110 to supply purified water to the carbonated water tank 110.

The purified water supply passage 210 may be provided with a purified water supply valve 211 for opening and closing the purified water supply passage 210. The carbonated water discharge passage 230 may be provided with a carbonated water discharge valve 231 for opening and closing the carbonated water discharge passage 230 and a carbonated water regulator 232 for regulating the pressure of the discharged carbonated water. The exhaust passage 250 may be provided with an exhaust valve 251 for opening and closing the exhaust passage 250. Here, the purified water supply valve 211 and the carbonated water discharge valve 231 may be solenoid valves, respectively.

The carbonated water tank 110 is provided with a water level sensor 111 capable of measuring the amount of purified water supplied to the carbonated water tank 110, A temperature sensor 112 capable of measuring the temperature of the carbonated water can be provided.

The carbonated water tank 110 may be provided with a safety valve 114 capable of discharging high-pressure carbon dioxide exceeding a predetermined pressure to the carbonated water tank 110 due to malfunction of the carbon dioxide regulator 201 or the like have.

The carbonated water tank 110 may be formed to have a predetermined size, and may be formed to receive an integer of about 1 liter. In addition, the carbonated water tank 110 may be formed of a stainless material so as to withstand the high pressure and to have corrosion resistance while minimizing the size of the tank. The carbonated water tank 110 may be received in the first upper accommodation space 151 of the module case 140. The carbonated water tank 110 may be supported by the bottom support 155 and the guide portion 156 of the module case 140.

In addition, a leakage detection sensor (not shown) may be provided in the first upper receiving space 152 or the second upper receiving space 152 to detect whether the carbonated water tank 110 is leaking. The leakage detection sensor includes a pair of electrodes, and it is possible to detect leakage by applying a voltage between a pair of electrodes and sensing a current flowing therethrough.

The purified water supply valve 211 and the carbonated water discharge valve 231 described above are connected to the purified water discharge valve 221 provided in the purified water discharge passage 220 for discharging the purified water directly from the water tank 70 to the water intake space 91 Thereby forming the integrated valve assembly 130 together. That is, the purified water supply valve 211, the carbonated water discharge valve 231, and the purified water discharge valve 221 may be integrally formed. Herein, the purified water discharge valve 221 may be provided as a solenoid valve like the purified water supply valve 211 and the carbonated water discharge valve 231.

The integrated valve assembly 130 includes a first inlet port 130a connected to the water tank 70, a second inlet port 130b connected to the carbonated water tank 110, a first outlet connected to the carbonated water tank 110, A second outlet port 130d connected to the dispenser nozzle 95, and a third outlet port 130e.

The purified water supply passage 210 and the purified water discharge passage 220 can pass through the first inlet port 130a and the carbonated water discharge passage 230 can pass through the second inlet port 130b. The purified water supply passage 210 can pass through the first outflow port 130c and the purified water discharge passage 220 can pass through the second outflow port 130d and the carbonated water can be discharged to the third outflow port 130e The flow path 230 can pass through.

However, the purified water supply valve 211, the purified water discharge valve 221, and the carbonated water discharge valve 231 are independently opened and closed.

In this embodiment, the integrated valve assembly 130 is composed of three independent valves 211, 221, and 231 as described above. However, in the water tank 70, the water tank 110 or the water intake space 91 Way flow control valve for selectively flowing the water from the water tank 70 to the water intake space 91 or supplying the purified water from the carbonated water tank 110 to the water intake space 91, It is of course possible to constitute a switching valve.

The integrated valve assembly 130 may be received in the second upper housing space 152 of the module case 140.

On the other hand, a purified water discharge passage 220 for directly discharging the purified water from the water tank 70 to the water intake space 91 and a carbonated water discharge passage 230 for discharging the carbonated water of the carbonated water tank 110 to the water intake space 91 So that the integrated discharge passage 240 can be formed.

The purified water discharge passage 210 and the carbonated water discharge passage 230 may be joined outside the integrated valve assembly 130. Accordingly, the dispenser nozzle 95 may be integrally provided without separately providing the purified water discharge passage 210 and the carbonated water discharge passage 230. Of course, the purified water discharge passage 210 and the carbonated water discharge passage 230 may be extended to the dispenser nozzle 95 separately from each other.

The integrated discharge flow passage 240 is provided with an integrated discharge flow passage 240 for discharging the purified water or carbonated water remaining in the integrated discharge flow passage 240 to the water intake space 91 in a state where the purified water discharge valve 221 and the carbonated water discharge valve 231 are closed, And a residual water discharge prevention valve 241 for opening and closing the discharge port 240 may be provided. It is preferable that such a residual water discharge prevention valve 241 is provided at the end of the integrated discharge passage 240 as much as possible.

The module case 140 may include a back case 150 having one open side and a cover 160 coupled to an open side of the back case 150.

At least one insertion groove 154 may be formed in the module case 140 at a position corresponding to at least one insertion protrusion 25 formed on the rear surface of the door 21. Therefore, the module case 140 can be easily mounted on the rear surface of the door 21 by inserting the insertion protrusion 25 into the insertion groove 154. However, such a coupling structure is an exemplary one, and the module case 140 can be detachably mounted on the rear surface of the door 21 through various coupling structures such as a screw coupling structure and a hook coupling structure, in addition to the insertion structure.

The back case 150 and the cover 160 may have insertion holes 158 and insertion protrusions 162 at positions corresponding to each other so that the cover 160 can be coupled to the back case 150. However, such a coupling structure is also exemplary, and the back case 150 and the cover 160 may also be detachably coupled through various coupling structures.

The carbon dioxide cylinder 120, the carbonated water tank 110, and the integrated module assembly 130 inside the module case 140 are not exposed to the outside while the cover 160 is coupled to the back case 150 . Therefore, the aesthetics of the door 21 may not be hindered.

The cover 160 is provided with a ventilation hole 161 communicating with the inside and the outside of the module case 140 so that even when the cover 160 is coupled to the back case 150, The cooling water in the storage chamber is supplied to the storage tank 110 and the carbonated water stored in the carbonated water tank 110 can be cooled or maintained at an appropriate temperature.

The cover 160 includes a first cover 160a for opening and closing the upper accommodating spaces 151 and 152 in which the carbonated water tank 110 and the integrated valve assembly 130 are accommodated, And a second cover 160b that opens and closes the first cover 153. [ The first cover 160a and the second cover 160b can be opened and closed independently of each other.

Accordingly, when the carbon dioxide of the carbon dioxide cylinder 120 is exhausted and the carbon dioxide cylinder 120 is replaced, the first cover 160a does not need to be opened, but only the second cover 160b is removed to replace the carbon dioxide cylinder 120 . Therefore, even when the carbon dioxide cylinder 120 is replaced, the first cover 160a is kept closed to prevent the cool air in the upper space 151 from flowing out.

In another aspect, the carbonate water producing module 100 of the refrigerator according to the embodiment of the present invention includes a first module having a carbonated water tank 110 and a first storage space 151 for storing the carbonated water tank 110, A carbon dioxide cylinder 120 and a second accommodation space 153 for receiving the carbon dioxide cylinder 120.

At this time, the second module may be provided on the lower side of the first module. The second module may be provided on the side of the ice guide passage 94 for guiding the ice of the ice maker 80 to the water intake space 91. [

The first module includes a first cover 160a that opens and closes the first accommodation space 151 and the second module opens and closes the second accommodation space 153 and independently opens and closes the first cover 160a. And a second cover 160b.

FIG. 6 is a block diagram showing a control flow of a refrigerator according to an embodiment of the present invention, and FIG. 7 is a view illustrating a control panel of a refrigerator according to an embodiment of the present invention.

6 and 7, a refrigerator according to an embodiment of the present invention includes a water level sensor 111, a temperature sensor 112, a water leakage sensor 114, a pressure sensor 204, an exhaust valve And an integrated valve assembly 130 in which a purified water supply valve 211 and a purified water discharge valve 221 and a carbonated water discharge valve 231 are integrally formed and the refrigerator 1, A control unit 310 that receives operation commands from a user and displays operation information of the refrigerator 1, a control unit 310 that collectively controls operations of the refrigerator 1, a program and data for controlling the refrigerator 1 And a storage unit 320 for storing the data.

Based on the information received from the water level sensor 111, the temperature sensor 112, the water leakage sensor 114, the carbon dioxide pressure sensor 204 and the control panel 300 described above, the exhaust valve 251, the carbon dioxide supply valve 202 and the integral valve assembly 130 in which the purified water supply valve 211, the purified water discharge valve 221 and the carbonated water discharge valve 231 are integrally formed will be omitted.

The control panel 300 includes an input unit for receiving a user's operation command and a display unit for displaying operation information of the refrigerator 1. [ Particularly, the control panel 300 includes a carbonated water production command inputting section 303 for receiving a user's operation command for producing carbonated water, and a carbonated water producing information displaying section 301 for displaying operation information of the refrigerator 1 relating to carbonated water production do.

The carbonated water production command input unit 303 receives a carbonated water production activation command for activating carbonated water production from the user, a carbonated water production inactivation command for deactivating the carbonated water production, a concentration of carbonated water produced by the refrigerator 1 (1 st, 2 nd, Is selected by the user. The input unit including the carbonated water production command input unit 303 may employ a pressure switch or a touch pad.

The carbonated water producing information display section 301 includes a carbonated water concentration display area 301a representing the concentration of the carbonated water produced by the refrigerator 1, a carbonated water producing display area 301b indicating whether or not the carbonated water production of the refrigerator 1 is activated A carbonated water production status display area 301c for indicating the progress of production of the carbonated water of the refrigerator 1 and a carbon dioxide low pressure display area 305 for indicating the replacement time of the carbon dioxide cylinder 120. [ A liquid crystal display (LCD) panel or a light emitting diode (LED) panel may be used as the display unit including the carbonated water producing information display unit 301. [

The control panel 300 of the refrigerator 1 according to the embodiment of the present invention is provided with an input unit and a display unit separately, but the present invention is not limited to this, and a touch screen panel (TSP) having an input unit and a display unit can do.

The control unit 310 controls the exhaust valve 251, the carbon dioxide supply valve 202, the water purification valve 204, and the water purification valve 204 based on information received from the water level sensor 111, the temperature sensor 112, the carbon dioxide pressure sensor 204, And controls the integrated valve assembly 130 and the control panel 300 in which the supply valve 211, the purified water discharge valve 221 and the carbonated water discharge valve 231 are integrally formed.

The storage unit 320 may temporarily store not only the program and data for controlling the refrigerator 1 but also the operation information of the refrigerator 1. [

FIG. 8 is a diagram illustrating that a refrigerator according to an embodiment of the present invention receives an operation command related to manufacturing carbonated water from a user.

When the refrigerator 1 is first powered on, the refrigerator 1 sets the production of carbonated water to the inactive state and displays the carbonated water production display area 301b of the carbonated water production information display 301 as shown in FIG. 8 (a) ) Indicates that the production of carbonated water is inactivated (OFF).

The user can input a carbonic acid water production activation command for activating the carbonated water production or a carbonic acid water production inactivation command for deactivating the carbonic acid water production to the refrigerator 1 through the carbonic acid water production command input unit 303. [ Specifically, when the user touches or holds the carbonated water production command input unit 303 for a long time in a state in which the production of carbonated water is inactive, the refrigerator 1 activates the production of carbonated water. 8 (b), the refrigerator 1 indicates that the carbonated water production display area 301b is activated (ON), and the carbonated water production concentration display area 301a displays the initial value Quot; first step "or" low concentration "

If the user touches or holds the carbonated water production command input unit 303 for a long time in a state where the production of carbonated water is activated, the refrigerator 1 deactivates the production of carbonated water, and the production of carbonated water is inactivated (OFF) in the displayed area 301b Display.

In addition, the user can select the concentration of carbonated water through the carbonated water production command input unit 303. [ Specifically, if the user touches or briefly touches the carbonated water production command input unit 303 while the carbonated water production is activated, the refrigerator 1 increases the concentration of the produced carbonated water by one level. That is, when the user touches or briefly presses the carbonated water production command input unit 303 when the carbonic acid water concentration is "one step" or "low concentration", the refrigerator 1 changes the carbonic acid water concentration to " Quot; 1 "or" low concentration "is displayed in the carbonated water production concentration display area 301a. When the user touches or briefly touches the carbonated water production command input unit 303 when the carbonic acid water concentration is "2-level" or "medium concentration", the refrigerator 1 raises the carbonated water concentration to "3-level" or "high concentration". However, if the user touches or shortly presses the carbonic acid water production command input unit 303 when the carbonic acid water concentration is "three levels" or "high concentration", the refrigerator 1 lowers the carbonic acid water concentration to "one level" or "low concentration" .

When the refrigerator 1 is producing carbonated water, the refrigerator 1 indicates that the carbonated water is being produced in the carbonated water production status display area 301c as shown in FIG. 8 (d).

The configuration of the refrigerator 1 according to the embodiment of the present invention has been described in detail above.

Hereinafter, a description will be given of a case where the refrigerator 1 according to the embodiment of the present invention produces carbonated water. The refrigerator (1) produces carbonated water in a state in which the production of carbonated water is activated, and does not produce carbonated water in the state in which the production of carbonated water is inactive.

FIGS. 9A and 9B are views schematically showing a method for manufacturing carbonated water by a refrigerator according to an embodiment of the present invention.

9A and 9B, the refrigerator according to one embodiment of the present invention briefly describes the production of carbonated water. In order to produce carbonated water, the refrigerator 1 first supplies purified water to the carbonated water tank 110, And carbon dioxide is supplied to the carbonated water tank 110. Thereafter, the refrigerator (1) waits for a certain period of time so that the supplied carbon dioxide is dissolved in the purified water.

9A is a view showing that the refrigerator 1 supplies purified water to the carbonated water tank 110. When the refrigerator 1 opens the purified water supply valve 211 as shown in FIG. 70 along the purified water supply flow path 210 and is supplied to the carbonated water tank 110.

9B is a view showing that the refrigerator 1 supplies carbon dioxide to the carbonated water tank 110. When the refrigerator 1 opens the carbon dioxide supply valve 211 as shown in FIG. Is depressurized by the carbon dioxide regulator, and the decompressed carbon dioxide moves along the carbon dioxide supply passage 200 and is supplied to the carbonated water tank 110.

The carbon dioxide supplied to the carbonated water tank 110 is dissolved in the purified water, thereby producing carbonated water.

Hereinafter, a method of manufacturing carbonated water by the refrigerator 1 according to an embodiment of the present invention will be described in detail.

The refrigerator 1 according to an embodiment of the present invention can not only produce carbonated water manually when a user inputs a carbonated water production command, but can also automatically produce carbonated water when a predetermined condition is satisfied.

10 is a flowchart showing that a refrigerator according to an embodiment of the present invention starts manufacturing carbonated water by a user's carbonated water production command.

Referring to FIG. 10, the refrigerator 1 determines whether a carbonated water production activation command is input from the user (680). As described above, the user can input a carbonated water production activation command by touching or depressing the carbonated water production command input unit 303 provided on the control panel 300 for a long time.

If the carbonate water production activation command is input (YES in 680), the refrigerator 1 determines whether the carbonated water is being produced (682). This is because, when the user enters a command to activate the carbonated water after inputting the command for deactivating the carbonated water in the state where the production of the carbonated water is activated for the manufacture of the carbonated water, the command for activating the carbonated water production can be inputted while the production of the carbonated water is in progress.

If the carbonated water production is in progress (YES in 682), the refrigerator 1 resumes production of the running carbonated water (686).

If the carbonated water production is not in progress (No in 682), the refrigerator 1 commences production of carbonated water (684).

In this way, the refrigerator 1 starts or resumes the carbonated water production when the user issues a command to activate the carbonated water production by the user in the inactive state of the carbonated water production.

FIG. 11 is a flowchart showing the start of carbonated water generation by determining whether or not the refrigerator according to an embodiment of the present invention is producing carbonated water.

Referring to FIG. 11, the refrigerator 1 initializes the carbonated water accumulation discharge time (610). The accumulated carbonated water discharge time means the total time taken for the user to discharge the carbonated water by operating the dispenser lever 93 provided in the dispenser 90 after the carbonated water is produced. Since the carbonated water is discharged at a constant rate by the carbonated water regulator 232, the amount of carbonated water remaining in the carbonated water tank 110 can be estimated through the accumulated carbonated water discharge time.

Thereafter, the refrigerator 1 initializes the carbonated water discharge command waiting time (615). The carbonated water discharge command waiting time means a time elapsed after the user discharges the carbonated water by operating the dispenser lever 93. [

Thereafter, the refrigerator 1 determines whether a carbonated water discharge command is inputted from the user (620). As described above, the user can input the carbonated water discharge command by pressing the dispenser lever 93 provided in the dispenser 90. [

When the user inputs a carbonated water discharge command (YES at 620), the refrigerator 1 opens the carbonated water discharge valve 231 to discharge carbonated water (625). When the carbonated water discharge valve 231 is opened as described above, the carbonated water is discharged at a constant rate by the pressure of the carbonated water tank 110.

During discharging the carbonated water, the refrigerator 1 calculates the carbonated water discharge time (630). Specifically, the refrigerator 1 can calculate the carbonated water discharge time by calculating the opening time of the carbonated water discharge valve 231 or the operation time of the dispenser lever 93. [

Thereafter, the refrigerator 1 updates the accumulated carbonated water discharge time (635). Specifically, the refrigerator 1 can update the accumulated carbonated water discharge time by storing the sum of the carbonated water discharge time calculated in step 630 in the accumulated accumulated carbonated water discharge time at the existing accumulated carbonated water discharge time.

Thus, the refrigerator 1 can calculate the carbonated water discharge time every time the carbonated water is discharged, and can update the accumulated carbonated water discharge time based on the calculated carbonated water discharge time. Based on the calculated accumulated carbonated water discharge time, the refrigerator 1 Can estimate the carbonated water discharge amount after manufacturing the carbonated water and can estimate the remaining carbonated water remaining amount in the carbonated water tank 110 from the carbonated water discharge amount.

Thereafter, the refrigerator 1 senses the carbonated water level using the water level sensor 111 (640). Thus, the refrigerator 1 senses the carbonated water level when the user inputs the carbonated water discharge command. Since the water level sensor 111 senses the carbonated water level based on the current value flowing between the plurality of electrodes, if the water level is continuously sensed, bubbles are generated around the electrodes due to the chemical reaction between the carbonated water and the electrodes, An error may occur. In order to prevent the malfunction of the water level sensor 111, the refrigerator 1 senses the carbonated water level when the user inputs a carbonated water discharge command.

If the sensed carbonated water level is lower than or equal to the minimum water level (YES in step 645), the refrigerator 1 starts to produce carbonated water (step 650) . That is, the refrigerator 1 measures the amount of carbonated water remaining in the carbonated water tank 110 after discharging the carbonated water, and starts producing carbonated water when the amount of remaining carbonated water is not more than the reference value.

If the sensed carbonated water level is higher than the minimum water level (NO at 645), the refrigerator 1 returns to step 615 to initialize the carbonated water discharge command waiting time (615). Since the carbonated water is discharged by the carbonated water discharge command, the waiting time of the carbonated water discharge command is initialized.

If no carbonated water discharge command is input in step 620 (NO in 620), the refrigerator 1 calculates the carbonated water discharge command waiting time (655). Thereafter, the refrigerator 1 compares the waiting time of the carbonated water discharge command with a predetermined maximum waiting time (660). If the waiting time of the carbonated water discharge command is longer than the maximum waiting time (example of 660), the refrigerator 1 compares the cumulative carbonated water discharge time with the preset maximum cumulative discharge time (665) (665), the refrigerator (1) starts producing carbonated water.

The carbonated water discharge command waiting time means the time elapsed after the user inputs the most recent carbonated water discharge command as described above. This waiting time of the carbonated water discharge command is longer than the predetermined maximum waiting time, which means that the user has not used the carbonated water for a long time, which means that the user will not use the carbonated water for a while. Also, the amount of carbonated water discharged and the residual amount of carbonated water can be estimated through the cumulative discharge time of carbonated water.

Thus, if the user is not expected to input a sparkling water discharge command for a while and it is determined that a certain amount of sparkling water has been discharged, it is necessary to further manufacture carbonated water. That is, in order to prevent the user from waiting while producing the carbonated water because the water level of the carbonated water becomes the minimum water level, the refrigerator 1 does not use the carbonated water for a while even if the water level of the carbonated water stored in the carbonated water tank 110 is not below the minimum water level Carbonated water can be produced if it is not expected.

Therefore, the refrigerator 1 judges whether or not the user intends to drink carbonated water by comparing the waiting time of the carbonated water discharge command with the maximum discharge command waiting time, and compares the accumulated carbonated water discharge time with the maximum accumulated discharge time, The user estimates the amount of carbonated water remaining in the carbonated water tank 110, and as a result, if the user is not expected to input the carbonated water discharge command for a while and the remaining carbonated water in the carbonated water tank 110 is expected to be a certain amount or less, .

The refrigerator 1 according to the embodiment of the present invention initiates the production of carbonated water when the waiting time of the carbonated water discharge command is longer than the maximum discharge command waiting time and the accumulated carbonated water discharge time is longer than the maximum cumulative discharge time, If the discharge time is longer than the maximum cumulative discharge time, carbonated water production can be started.

12 is a view illustrating a method of manufacturing carbonated water by a refrigerator according to an embodiment of the present invention.

12, the refrigerator 1 according to an embodiment of the present invention can produce carbonated water having three concentrations of 1, 2, and 3 steps (low concentration, medium concentration, and high concentration) Is dependent on the number of times the carbonated water is supplied.

Specifically, the refrigerator 1 supplies carbon dioxide to the carbonated water tank 110 for the first carbon dioxide supply time (6 seconds) after supplying it to the carbonated water tank 110 to the highest water level to produce carbonated water in the first stage And dissolves carbon dioxide supplied for the first carbon dioxide dissolution time (4 minutes).

In addition, the refrigerator 1 performs a process of producing carbonated water in a first stage (low concentration) in order to produce carbonated water in two stages (medium concentration), and then, in a carbonated water tank 110 during a second carbon dioxide supply time The carbon dioxide is supplied and the carbon dioxide supplied during the second carbon dioxide dissolution time (8 minutes) is dissolved.

In addition, the refrigerator 1 performs a process of producing carbonated water in two stages (medium concentration) in order to produce carbonated water in three stages (high concentration), and then, in the carbonated water tank 110 during the third carbon dioxide supply time Carbon dioxide is supplied, carbon dioxide supplied during the third carbon dioxide dissolution time (12 minutes) is dissolved, and carbon dioxide is supplied to the carbonated water tank 110 during the fourth carbon dioxide supply time (5.5 seconds).

13A and 13B are views showing a method of producing carbonated water according to the manufacturing method shown in FIG.

13A and 13B, first, the refrigerator 1 indicates that carbonated water is being manufactured (710). Specifically, the refrigerator 1 can display that the carbonated water is being produced in the carbonated water production status display area 301c as shown in FIG. 8 (d).

Thereafter, the refrigerator 1 opens the purified water supply valve 211 (714) after opening the exhaust valve 251 (712). Thus, the refrigerator 1 opens the exhaust valve 251 and opens the purified water supply valve 211 so that the purified water is smoothly supplied to the carbonated water tank 110. At this time, the refrigerator (1) can continuously supply the purified water to the carbonated water tank (110) by continuously opening the purified water supply valve (211).

When the solenoid valve is employed as the purified water supply valve 211, the purified water supply valve 211 is opened for a predetermined time and then the purified water supply valve 211 is closed for a while to prevent the solenoid from being overheated. Can be opened for a predetermined time. Specifically, the purified water supply valve 211 may be closed for one minute and then closed for five seconds.

Thereafter, the refrigerator 1 senses the purified water level through the water level sensor 111 (716), compares the sensed purified water level with a predetermined maximum water level, and determines whether or not the constant in the carbonated water tank 110 reaches the maximum water level (718).

When the purified water in the carbonated water tank 110 reaches the maximum water level (YES in 716), the refrigerator 1 closes the purified water supply valve 211 (720) and closes the exhaust valve 251 (722).

Thereafter, the refrigerator 1 opens the carbon dioxide supply valve 202 (724), determines whether the first carbon dioxide supply time (for example, 6 seconds) has elapsed after opening the carbon dioxide supply valve 202 The refrigerator 1 closes the carbon dioxide supply valve 202 (728) if the first carbon dioxide supply time (for example, 6 seconds) has passed. In this way, the refrigerator 1 allows the carbonated water tank 110 to be supplied with carbon dioxide during the first carbon dioxide supply time (for example, 6 seconds).

Thereafter, the refrigerator 1 waits for a first carbon dioxide dissolution time (for example, 4 minutes) (730). That is, the carbon dioxide supplied to the carbonated water tank 110 can be sufficiently dissolved in the purified water.

Thereafter, the refrigerator 1 determines whether the carbonated water concentration selected by the user is "the first stage (low concentration)" (732).

If the concentration of carbonated water selected by the user through the control panel 300 is the first level (low concentration) (YES in 732), the refrigerator 1 indicates completion of carbonated water production (758) and ends the production of carbonated water.

The refrigerator 1 opens the carbon dioxide supply valve 202 (734), opens the carbon dioxide supply valve 202, and turns off the carbon dioxide supply valve 202 (step 732) If the second carbon dioxide supply time (for example, 4 seconds) has elapsed (YES in step 736), the refrigerator 1 determines whether the carbon dioxide supply time (for example, 4 seconds) The valve 202 is closed (738). In this way, the refrigerator 1 supplies carbon dioxide to the carbonated water tank 110 for a second carbon dioxide supply time (for example, 4 seconds).

Thereafter, the refrigerator 1 waits for a second carbon dioxide dissolution time (e. G., 8 minutes) (740). That is, the carbon dioxide supplied to the carbonated water tank 110 can be sufficiently dissolved in the purified water.

Thereafter, the refrigerator 1 determines whether the carbonated water concentration selected by the user is "second stage (medium concentration)" (742).

If the concentration of carbonated water selected by the user is the second stage (medium concentration) (Yes in 742), the refrigerator 1 indicates completion of carbonated water production (758) and ends the production of carbonated water.

If the carbonic acid water concentration selected by the user is not the second level (medium concentration) (NO in 742), the refrigerator 1 sets the third carbon dioxide supply time (for example, 5.5 seconds) after opening the carbon dioxide supply valve 202 If the third carbon dioxide supply time (for example, 5.5 seconds) has elapsed (YES in step 746), the refrigerator 1 closes the carbon dioxide supply valve 202 (step 748). In this way, the refrigerator 1 supplies carbon dioxide to the carbonated water tank 110 for a third carbon dioxide supply time (for example, 5.5 seconds).

Thereafter, the refrigerator 1 waits for a third carbon dioxide dissolution time (e.g., 12 minutes) (750). That is, the carbon dioxide supplied to the carbonated water tank 110 can be sufficiently dissolved in the purified water.

Thereafter, the refrigerator 1 determines whether the fourth carbon dioxide supply time (for example, 5.5 seconds) has elapsed after opening the carbon dioxide supply valve 202 (752), and determines whether the fourth carbon dioxide supply time (For example, 5.5 seconds) has elapsed (step 754), the refrigerator 1 closes the carbon dioxide supply valve 202 (step 756). In this way, the refrigerator 1 supplies carbon dioxide to the carbonated water tank 110 for a fourth carbon dioxide supply time (for example, 5.5 seconds).

Thereafter, the refrigerator 1 indicates completion of carbonated water production (758) and ends the production of carbonated water.

The refrigerator (1) according to the embodiment of the present invention produces carbonated water when the requirements for starting the production of certain carbonated water are satisfied without taking the temperature of the purified water into account in manufacturing the carbonated water.

Since the solubility of the gas in the liquid is higher as the temperature of the liquid is lower, carbonated water can be produced in consideration of the temperature of the purified water. For example, after the purified water is supplied to the carbonated water tank 110, the temperature of the purified water stored in the carbonated water tank 110 is measured. If the temperature of the purified water stored in the carbonated water tank 110 is equal to or higher than the predetermined temperature, Delay the supply of carbon dioxide. As described above, since the carbonated water tank 110 is located inside the refrigerating chamber 20, the temperature of the purified water stored in the carbonated water tank 110 is lowered over time. Therefore, when the measured temperature of the purified water is lower than a predetermined temperature, the refrigerator 1 can produce carbonated water by supplying carbon dioxide.

Hereinafter, the operation of the refrigerator 1 will be described with reference to the operation of the refrigerator 1 when an unusual situation occurs, for example, when the user inputs a water purification command or the user opens the refrigerator compartment doors 21 and 22 during the carbonated water production according to the embodiment of the present invention. do.

When the user presses the dispenser lever 93 to supply the purified water to the carbonated water tank 110 during the production of the carbonated water, the refrigerator 1 stops supplying the purified water to the carbonated water tank 110, And the purified water is discharged to the outside through the dispenser 90.

The purified water supplied to the carbonated water tank 110 and the purified water discharged to the outside through the dispenser 90 are supplied by the water tank 70 and the water pressure of the purified water is limited when the water tank 70 supplies purified water . Accordingly, when the water tank 70 supplies the purified water to the carbonated water tank 110 and the purified water is discharged through the dispenser 90, the water pressure of the purified water discharged through the dispenser 90 may be lowered. This is because if the water pressure of the purified water discharged through the dispenser 90 is lowered, there is a fear that the user mistakenly thinks that the refrigerator 1 has failed.

In order to prevent the water pressure of the purified water discharged through the dispenser 90 from being lowered, when the user inputs a purified water discharge command while supplying purified water to the carbonated water tank 110, the refrigerator 1 is returned to the carbonated water tank 110 The supply of the purified water is stopped and the purified water is discharged through the dispenser 90. Thereafter, when the user inputs the purified water discharge end command, the refrigerator 1 stops discharging the purified water through the dispenser 90 and supplies the purified water to the carbonated water tank 110.

When the user opens the refrigerating chamber doors 21 and 22 during the production of carbonated water, the refrigerator 1 stops producing carbonated water. That is, when the user opens the doors 21 and 22 of the refrigerating chamber while supplying purified water to the carbonated water tank 110, the refrigerator 1 stops supplying the purified water to the carbonated water tank 110, When the user opens the doors 21 and 22 of the refrigerating compartment provided with the carbonated water producing module 100 while the user supplies the carbon dioxide to the carbonated water tank 110, even if the condition for supplying carbon dioxide to the carbonated water tank 110 is satisfied, The supply of carbon dioxide is delayed until the fuel cells 21 and 22 are closed. Further, the refrigerator (1) stops supplying carbon dioxide to the carbonated water tank (110). The water tank 70 supplies purified water to the carbonated water tank 110 with a high water pressure and the carbon dioxide cylinder 120 also supplies carbon dioxide to the carbonated water tank 110 at a high pressure so that noise may be generated during the carbonated water production process. Thus, when the user opens the doors 21 and 22 of the refrigerator compartment, the user may feel uncomfortable, and there is a fear that the user mistakenly thinks that the refrigerator 1 has failed.

In order to prevent noise from being generated in the carbonated water producing module 100 when the user opens the doors 21 and 22 of the refrigerating chamber, the refrigerator 1 stores the advanced carbonated water manufacturing process and then stops producing carbonated water. When the user closes the doors 21 and 22 of the refrigerator compartment, the refrigerator 1 continues manufacturing carbonated water.

FIGS. 14A and 14B are flowcharts showing control of a refrigerator according to an embodiment of the present invention when an unusual situation occurs during carbonated water production.

14A and 14B, the refrigerator 1 first displays the manufacture of carbonated water on the control panel 300 (902).

Thereafter, the refrigerator 1 opens the exhaust valve 251 (904), opens the purified water supply valve 211 (906), and supplies purified water to the carbonated water tank 110.

While supplying the purified water to the carbonated water tank 110, the refrigerator 1 determines whether a purified water discharge command is inputted (908). That is, whether or not the user presses the dispenser lever 93 provided on the dispenser 90.

If the user has input an integer drain command (908), the refrigerator 1 stores the ongoing carbonated water production status (940).

Thereafter, the refrigerator 1 stops supplying purified water to the carbonated water tank 110 by closing the purified water supply valve 211 (942), and the refrigerator 1 opens the purified water discharge valve 221 (944) The purified water is discharged to the outside.

While discharging the purified water to the outside, the refrigerator 1 determines whether the purified water discharge end command is inputted (946). That is, whether or not the user has stopped pressing the dispenser lever 93 provided in the dispenser 90. [

When the user inputs the water discharge end command (YES in step 946), the refrigerator 1 stops discharging the purified water to the outside by closing the purified water discharge valve 221 (948), and the refrigerator 1 stops the purified water supply valve 211 is opened (950) to restart the production of carbonated water.

If the user does not input the water purge command (NO in 908), the refrigerator 1 determines whether the refrigerating compartment doors 21 and 22 are opened (910).

When the user opens the doors 21 and 22 of the refrigerating chamber, the refrigerator 1 stores the on-going carbonated water manufacturing status (930).

Thereafter, the refrigerator 1 stops the carbonated water production by closing the purified water supply valve 211 (932).

Thereafter, the refrigerator 1 determines whether the refrigerating compartment doors 21 and 22 are closed (934).

When the doors 21 and 22 of the refrigerator compartment are closed (YES in step 934), the refrigerator 1 resumes the production of carbonated water by opening the purified water supply valve 211 (936).

If the user has not opened the doors 21 and 22 of the refrigerating compartment (NO in 910), the refrigerator 1 senses the purified water level of the carbonated water tank 110 (912).

Thereafter, the refrigerator 1 determines whether the purified water level of the carbonated water tank 110 reaches the maximum water level (914).

If the purified water level of the carbonated water tank 110 has not reached the maximum water level (NO in 914), the refrigerator 1 determines whether the purified water discharge command is input, whether the refrigerator compartment door is opened and whether the purified water level of the carbonated water tank 110 is And it is determined whether or not the maximum water level has been reached.

The refrigerator 1 closes the purified water supply valve 211 and closes the exhaust valve 251 to the carbonated water tank 918 by closing the exhaust valve 251 110).

Thereafter, the refrigerator 1 supplies carbon dioxide to the carbonated water tank 110 by opening the carbon dioxide supply valve 202 (920).

While supplying carbon dioxide to the carbonated water tank 110, the refrigerator 1 determines whether the doors 21 and 22 of the refrigerating compartment are opened (922).

When the doors 21 and 22 of the refrigerator compartment are opened, the refrigerator 1 stores the on-going carbonated water production status (960).

Thereafter, the refrigerator 1 stops the carbonated water production by closing the carbon dioxide supply valve 202 (962).

Thereafter, the refrigerator 1 determines whether the refrigerating compartment doors 21 and 22 are closed (964).

When the doors 21 and 22 of the refrigerator compartment are closed (YES in 964), the refrigerator 1 resumes the production of carbonated water by opening the carbon dioxide supply valve 202 (966).

If the doors 21 and 22 of the refrigerating compartment are not opened, the refrigerator 1 determines whether the carbon dioxide supplying time has passed (924).

If the carbon dioxide supply time has not elapsed, the refrigerator 1 repeats the determination of whether or not the refrigerator doors 21 and 22 are open and whether the carbon dioxide supply time has elapsed.

If the carbon dioxide supply time has elapsed, the refrigerator 1 closes the carbon dioxide supply valve 202 (926)

Thereafter, the refrigerator 1 determines whether the carbon dioxide dissolution time has passed (928).

When the carbon dioxide dissolution time has elapsed, the refrigerator 1 displays completion of carbonated water production on the control panel 300 (929).

In the foregoing, the refrigerator (1) according to the embodiment of the present invention has produced carbonated water.

Hereinafter, the management of the carbonated water manufactured after the carbonated water is manufactured by the refrigerator 1 according to the embodiment of the present invention will be described.

As described above, the refrigerator 1 according to an embodiment of the present invention discharges carbonated water to the outside by using the pressure of the carbon dioxide supplied to the carbonated water tank 110. Therefore, the pressure of carbon dioxide in the carbonated water tank 110 should be maintained at a predetermined value or higher. If the pressure of the carbon dioxide in the carbonated water tank 110 is not maintained at a predetermined value or more, the water pressure of the carbonated water discharged from the refrigerator 1 is lowered, and there is a possibility that the user mistakes the trouble of the refrigerator 1.

However, as carbon dioxide is produced over time, the carbon dioxide is dissolved in the purified water, so that the pressure of the carbon dioxide in the carbonated water tank 110 gradually decreases. Therefore, in order to maintain the pressure of carbon dioxide in the carbonated water tank 110, it is necessary to supply carbon dioxide to the carbonated water tank 110 when certain conditions are satisfied.

There are three major causes for the lowering of the pressure of carbon dioxide in the carbonated water tank 110.

The first reason is that the temperature of the carbonated water is lowered. The solubility of the gas in the liquid increases as the temperature of the liquid decreases. As the temperature of the carbonated water decreases, the amount of carbon dioxide dissolved in the carbonated water increases. Therefore, the lower the carbonated water temperature, the lower the carbon dioxide pressure in the carbonated water tank 110. Accordingly, when the temperature of the carbonated water in the carbonated water tank 110 is lowered, the refrigerator 1 supplies carbon dioxide to the carbonated water tank 110.

FIG. 15A is a flowchart showing the refrigerator according to an embodiment of the present invention re-supplying carbon dioxide to a carbonated water tank according to the temperature of carbonated water. FIG.

Referring to FIG. 15A, the refrigerator 1 first determines whether or not the carbonated water production is completed (812).

When the carbonated water production is not completed (NO in 812), the refrigerator 1 waits until the carbonated water production is completed. When the carbonated water production is completed (YES in 812), the refrigerator 1 The carbonated water temperature is sensed (813), and the refrigerator (1) sets the difference between the temperature of the carbonated water sensed in step 813 and the predetermined temperature interval as the reference temperature (814). That is, the reference temperature is initialized to the carbonated water temperature immediately after completion of the carbonated water production. For example, if the temperature of the present carbonated water is 15 degrees and the temperature interval is 5 degrees, the reference temperature is initialized to 10 degrees.

Thereafter, the refrigerator 1 senses the carbonated water temperature through the temperature sensor 112 (815).

Then, the refrigerator 1 compares the temperature of the carbonated water sensed in step 815 with the reference temperature to determine whether the temperature of the carbonated water is below the reference temperature (816). For example, it is determined whether or not the temperature of carbonated water is 10 degrees or less.

If the temperature of carbonated water is below the reference temperature (YES in 816), the refrigerator 1 opens the carbon dioxide supply valve 202 (818), determines whether the carbon dioxide re-supply time has elapsed (820) (820), the carbon dioxide supply valve is closed (822). That is, if the temperature of the carbonated water is below the reference temperature, the refrigerator 1 re-supplies carbon dioxide to the carbonated water tank 110 during the carbon dioxide supply time. At this time, the carbon dioxide re-supply time can be set to 1 second. Since the supply of carbon dioxide is not for producing carbonated water but for maintaining the internal pressure of the carbonated water tank 110, it is preferable that the carbon dioxide supplying time is shorter than the carbon dioxide supplying time for producing carbonated water.

After carbon dioxide is re-supplied to the carbonated water tank 110, the refrigerator 1 sets the new reference temperature to a value obtained by subtracting the temperature interval from the reference temperature (824). For example, if the reference temperature is 10 degrees and the temperature interval is 5 degrees, 5 degrees is the new reference temperature.

If the temperature of the carbonated water is not lower than the reference temperature in step 816 (NO in 816), the refrigerator 1 omits the supply of carbon dioxide to the carbonated water tank 110 again.

After that, the refrigerator 1 determines whether the carbonated water production condition is satisfied (826). If the carbonated water production is not started, the refrigerator 1 returns to the step 815 and senses the temperature of the carbonated water. Is repeated.

Consequently, every time the temperature of the carbonated water is lowered by the temperature interval at the completion of the production of the carbonated water, the refrigerator 1 re-supplies the carbonated water to the carbonated water tank 110. For example, when the temperature of the carbonated water at the time of completion of the carbonated water production is 15 degrees and the first temperature interval is 5 degrees, the refrigerator 1 is charged with the carbonated water in the carbonated water tank 110 every time the temperature of the carbonated water becomes 10 degrees, Supply.

The refrigerator 1 according to an embodiment of the present invention re-supplies carbon dioxide every time the temperature of the carbonated water stored in the carbonated water tank 110 is lowered by a predetermined temperature. However, the present invention is not limited to this, and the carbonated water stored in the carbonated water tank 110 The carbonated water tank 110 can be supplied with carbon dioxide again when the temperature is lower than a predetermined temperature.

The second reason is that the amount of carbonated water in the carbonated water tank 110 decreases. When the user discharges the carbonated water after the production of the carbonated water is completed, the volume of the carbonated water is reduced by the amount of the carbonated water discharged by the user, so that the pressure of the carbon dioxide in the carbonated water tank 110 is lowered. Accordingly, when the user discharges carbonated water, the refrigerator 1 re-supplies carbon dioxide to the carbonated water tank 110 to increase the pressure of the carbon dioxide in the carbonated water tank 110.

FIG. 15B is a flowchart showing the re-supply of carbon dioxide to the carbonated water tank when the refrigerator according to the embodiment of the present invention discharges carbonated water.

Referring to FIG. 15B, first, the refrigerator 1 determines whether the carbonated water production is completed (832).

If the carbonated water production is not completed (NO in 832), the refrigerator 1 waits until the carbonated water production is completed. When the carbonated water production is completed (YES in 832), the refrigerator 1 is set in advance at the first reference time A first time interval is stored (834). That is, the first reference period is initialized to a first predetermined time interval. At this time, the first time interval differs depending on the capacity of the carbonated water tank 110 and the discharge rate of the carbonated water. However, if the carbonated water tank 110 is approximately 1 liter and the carbonated water stored in the carbonated water tank 110 is discharged in one minute, It is preferable to set the interval of one hour to 10 seconds. That is, the first reference time can be initialized to 10 seconds.

Then, the refrigerator 1 compares the accumulated carbonated water discharge time with the first reference time, and determines whether the accumulated carbonated water discharge time is equal to or greater than the first reference time (836). Here, the accumulated carbonated water discharge time means the total time that the user discharges the carbonated water by operating the dispenser lever 93 provided in the dispenser 90 after the carbonated water is produced. That is, it is the same as the cumulative carbonated water discharge time described in FIG. The amount of carbonated water remaining in the carbonated water tank 110 can be estimated through the accumulated carbonated water discharge time as described above.

If the cumulative carbonated water discharge time is equal to or longer than the first reference time 836 (YES in step 836), the refrigerator 1 opens the carbon dioxide supply valve 202 (838), determines whether the carbon dioxide supply time has passed (840) When the supply time has elapsed (840 example), the carbon dioxide supply valve is closed (842). That is, when the user discharges the carbonated water over the first reference time, the refrigerator 1 re-supplies carbon dioxide to the carbonated water tank 110 during the carbon dioxide supply time. At this time, the carbon dioxide re-supply time can be set to 1 second. As described above, it is preferable that the carbon dioxide supplying time for maintaining the pressure in the carbonated water tank 110 is shorter than the carbon dioxide supplying time for producing carbonated water.

After carbon dioxide is re-supplied to the carbonated water tank 110, the refrigerator 1 sets the sum of the first reference time and the first time interval to a new reference temperature (844). For example, if the first reference time is 10 seconds and the first time interval is 10 seconds, 20 seconds is a new first reference time.

If it is determined in step 836 that the accumulated carbonated water discharge time is not equal to or greater than the first reference time (NO in 836), the refrigerator 1 omits to supply carbon dioxide to the carbonated water tank 110 again.

Then, the refrigerator 1 determines whether the carbonated water production conditions are satisfied (846). If the carbonated water production is not started, the refrigerator 1 returns to step 836 and compares the accumulated carbonated water discharge time with the first reference time Repeat.

As a result, after the user completes the production of the carbonated water, the user releases the carbonated water, and the refrigerator 1 re-supplies the carbonated water to the carbonated water tank 110 every time the cumulative carbonated water discharge time increases by the first time interval. For example, if the first time interval is 10 seconds, the refrigerator 1 re-supplies carbon dioxide to the carbonated water tank 110 whenever the accumulated carbonated water discharge time is 10 seconds, 20 seconds, 30 seconds, 40 seconds, and 50 seconds .

The third reason is that carbonated water is not used and stored in the carbonated water tank 110 for a long time. When the carbonic acid water is not discharged after being produced but stored in the carbonic acid water tank 110 for a long time, the carbon dioxide gradually dissolves in the carbonic acid water, so that the pressure of the carbon dioxide in the carbonic acid water tank 110 is lowered. Therefore, when the user does not discharge the carbonated water, and the carbonated water is stored in the carbonated water tank 110 for a long time, the refrigerator 1 re-supplies the carbonated water to the carbonated water tank 110 to increase the pressure of the carbon dioxide in the carbonated water tank 110.

FIG. 15C is a flowchart showing the operation of supplying carbon dioxide to the carbonated water tank when the refrigerator according to the embodiment of the present invention does not discharge carbonated water. FIG.

Referring to FIG. 15C, first, the refrigerator 1 determines whether or not the carbonated water production is completed (852).

If the carbonated water generation is not completed (No in 852), the refrigerator 1 waits until the carbonated water production is completed. When the carbonated water production is completed (Yes in 852) The set second time interval is stored (854). That is, the second reference period, at a second predetermined time interval. At this time, although the second time interval varies depending on the capacity of the carbonated water tank 110, if the carbonated water tank 110 is approximately 1 liter, the second time interval is preferably set to 2 hours. That is, the second reference time can be initialized to 2 hours.

Then, the refrigerator 1 compares the waiting time of the carbonated water discharge command with the second reference time to determine whether the carbonated water discharge command waiting time is equal to or longer than the second reference time (856). Here, the accumulated carbonated water discharge time refers to the time that has elapsed since the user discharged the carbonated water by operating the dispenser lever 93. That is, the waiting time of the carbonated water sparkling water discharge command described with reference to FIG.

The refrigerator 1 opens the carbon dioxide supply valve 202 (858), determines whether the carbon dioxide re-supply time has passed (860), and if the carbon dioxide discharge command waiting time is longer than the second reference time When the re-supply time has elapsed (860 example), the carbon dioxide supply valve is closed (862). That is, if the user does not discharge the carbonated water over the second reference time, the refrigerator 1 re-supplies the carbonated water to the carbonated water tank 110 during the carbon dioxide supply time. At this time, the carbon dioxide re-supply time can be set to 1 second. As described above, it is preferable that the carbon dioxide supplying time for maintaining the pressure in the carbonated water tank 110 is shorter than the carbon dioxide supplying time for producing carbonated water.

After carbon dioxide is re-supplied to the carbonated water tank 110, the refrigerator 1 sets the sum of the second reference time and the second time interval to a new reference temperature (864). For example, if the second reference time is 2 hours and the second time interval is 2 hours, 4 hours is a new second reference time.

If the standby time of the carbonic acid water discharge command is not equal to or longer than the second reference time in step 856 (NO in 856), the refrigerator 1 omits to supply carbon dioxide to the carbonated water tank 110 again.

Then, the refrigerator 1 determines whether the carbonated water production condition is satisfied (866). If the carbonated water production is not started, the refrigerator 1 returns to step 856 and compares the waiting time of the carbonated water discharge command with the second reference time Repeat.

As a result, the user does not discharge the carbonated water after completion of the carbonated water production, so that the refrigerator 1 re-supplies the carbonated water to the carbonated water tank 110 every time the standby time of the carbonated water discharge command is increased by the second time interval. For example, when the second time interval is 2 hours, every time the waiting time of the carbonated water discharge command becomes 2 hours, 4 hours, 6 hours, 8 hours, 10 hours, the refrigerator 1 sends carbon dioxide to the carbonated water tank 110 Supply.

As described above, the purified water for producing carbonated water is supplied through the water source, while the carbon dioxide is supplied through the carbon dioxide cylinder 120, and the amount of the carbon dioxide stored in the carbon dioxide cylinder 120 is limited.

If the carbon dioxide stored in the carbon dioxide cylinder 120 is mostly exhausted and the pressure of the carbon dioxide discharged from the carbon dioxide cylinder 120 is lowered, the concentration of the produced carbonated water becomes low. That is, since a sufficient amount of carbon dioxide is not supplied to the carbonated water tank 110, the concentration of the carbonated water is lowered. Thereafter, when the carbon dioxide stored in the carbon dioxide cylinder 120 is exhausted, carbonated water is not produced.

In addition, when the pressure of the carbon dioxide discharged from the carbon dioxide cylinder 120 is lowered, the carbonated water is not discharged through the dispenser 90. As described above, the carbonated water is discharged to the outside by the atmospheric pressure in the carbonated water tank 110. When the pressure of the carbon dioxide is lowered, the carbon dioxide is re-supplied to keep the carbon dioxide pressure in the carbonated water tank 110 constant. At this time, if the pressure of the carbon dioxide discharged from the carbon dioxide cylinder 120 is lowered, the carbon dioxide in the carbonated water tank 110 can not be maintained at a sufficient pressure even if carbon dioxide is re-supplied to the carbonated water tank 110, The carbonated water is not discharged through the dispenser 90 when the pressure of the carbon dioxide in the gas is low.

Therefore, it is necessary to replace the carbon dioxide cylinder 120 at certain intervals. The refrigerator (1) according to an embodiment of the present invention senses the pressure of carbon dioxide through the pressure sensor (204) and displays a carbon dioxide cylinder change on the control panel (300) when the pressure falls below a predetermined reference pressure.

FIG. 16 is a flowchart showing the refrigerator sensing the pressure of carbon dioxide according to an embodiment of the present invention.

Referring to FIG. 16, the refrigerator 1 senses the pressure of carbon dioxide through the pressure sensor 204 (870). As described above, the pressure sensor 204 is provided at the output end of the carbon dioxide regulator 201 and detects the pressure of the carbon dioxide discharged from the carbon dioxide regulator 201.

Thereafter, the refrigerator 1 determines whether the pressure of the carbon dioxide is below the reference pressure by comparing the pressure of the carbon dioxide with a preset reference pressure (872).

If the pressure of the carbon dioxide is not less than the reference pressure (NO in 872), the refrigerator 1 senses the pressure of the carbon dioxide and repeats the comparison of the sensed pressure of the carbon dioxide with the reference pressure.

If the pressure of the carbon dioxide is below the reference pressure, the refrigerator 1 warns the user that the pressure of the carbon dioxide has been lowered (874). That is, the refrigerator 1 warns the carbon dioxide low pressure display area 305 provided in the control panel 300 to replace the carbon dioxide cylinder. In addition, the refrigerator 1 can stop producing carbonated water if the pressure of the carbon dioxide is below the reference pressure.

Further, if the pressure of the carbon dioxide is below the reference pressure, the refrigerator 1 may not produce carbonated water even if the above-mentioned conditions for producing carbonated water are satisfied. For example, even if the water level of the carbonated water is below the minimum water level, the refrigerator 1 may not produce carbonated water.

When a pressure switch is used as the pressure switch, the pressure switch connects the output of the pressure switch to the display unit, and when the pressure of the carbon dioxide becomes equal to or lower than the reference pressure, the pressure switch transmits a low pressure signal to the display unit, ) Can display the low pressure of carbon dioxide.

In the foregoing, it has been described that the refrigerator 1 according to the embodiment of the present invention manages and manages carbonated water.

Hereinafter, the refrigerator 1 according to the embodiment of the present invention discharges carbonated water according to a user's command.

When the user presses the dispenser lever 93 provided in the dispenser 90 and inputs a sparkling water discharge command, the refrigerator 1 opens the sparkling water discharge valve 231 to discharge the carbonated water. When the user presses the dispenser lever 93 The refrigerator 1 closes the carbonated water discharge valve 231 and stops discharging the carbonated water.

17 is a view schematically showing the discharge of carbonated water by the refrigerator according to the embodiment of the present invention.

Referring to FIG. 17, the refrigerator 1 according to an embodiment of the present invention discharges carbonated water through the dispenser 90 when a user inputs a carbonated water discharge command from the user. More specifically, when the refrigerator 1 opens the carbonated water discharge valve 241, the carbonated water moves from the carbonated water tank 110 along the carbonated water discharge flow passage 230, and during this process, the carbonated water regulator 232, the carbonated water discharge valve 231, , And a residual water discharge prevention valve (241).

18 is a view showing that the refrigerator discharges carbonated water according to an embodiment of the present invention.

Referring to FIG. 18, the refrigerator 1 determines whether a carbonated water discharge command is inputted from a user (880). As described above, the user can input the carbonated water discharge command by pressing the dispenser lever 93 provided in the dispenser 90. [

When the carbonated water discharge command is input (YES in 880), the refrigerator 1 opens 882 the residual water discharge prevention valve 241, and then the refrigerator 1 opens the carbonated water discharge valve 231 (884) .

In order to prevent the wastewater discharge prevention valve 241 from being damaged, the wastewater discharge prevention valve 241 is opened first and then the carbonated water discharge valve 231 is opened.

Normally, the residual water discharge prevention valve 241 is not designed to withstand high pressure since it is provided to prevent the accumulated residual water from being discharged to the integrated discharge passage 240. That is, the residual water discharge prevention valve 241 can be easily broken by the discharge pressure of the carbonated water as compared with the carbonated water discharge valve 231. In addition, when the carbonic acid water tank 110 contains a large amount of carbon dioxide 110 that is not dissolved in carbonated water, the discharge pressure of carbonated water may be increased. There is a possibility that the residual water discharge prevention valve 241 may be damaged if it is suddenly delivered to the residual water discharge prevention valve 24 at such a high discharge pressure of the carbonated water.

Thereafter, the refrigerator 1 determines whether a carbonated water discharge end command is input (886). As described above, when the user stops pressing the dispenser lever 93, the user can input a carbonated water discharge end command.

When the carbonated water discharge end command is input (YES in 886), the refrigerator 1 closes the spilled water discharge prevention valve 241 (890) after closing the spark discharge valve 231 (888).

In order to prevent the damage of the residual water discharge prevention valve 241 when the carbonated water discharge valve 231 is first closed and the residual water discharge prevention valve 241 is closed when the carbonated water discharge is finished, That is, when the residual water discharge prevention valve 241 is closed during the discharge of the carbonated water, the residual water discharge prevention valve 241 may be damaged by the discharge pressure of the carbonated water.

The water discharge valve 231 is opened after the wastewater discharge prevention valve 241 is opened and the carbonated water discharge valve 231 is closed at the completion of discharging the carbonated water, Thereby preventing breakage of the residual water discharge prevention valve 241. [

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

1: Refrigerator 70: Water tank
90: dispenser 93: dispenser lever
100: Carbonated water production module 110: Carbonated water tank
111: water level sensor 112: temperature sensor
114: Leak detection sensor 120: Carbon dioxide cylinder
130: Integrated valve assembly 200: Carbon dioxide supply line
201: carbon dioxide regulator 202: carbon dioxide supply valve
204: pressure sensor 210: purified water supply flow path
211: purified water supply valve 220: purified water discharge flow path
221: purified water discharge valve 230: carbonated water discharge channel
231: Carbonated water discharge valve 232: Carbonated water regulator
240: Integrated discharge flow path 241: Residual discharge prevention valve
250: exhaust passage 251: exhaust valve
300: Control panel 301: Carbonated water production information display section
303: Carbonated water production command input unit 310:
320:

Claims (16)

A carbonated water tank for storing carbonated water;
A water tank for supplying purified water to the carbonated water tank;
A carbon dioxide cylinder for supplying carbon dioxide to the carbonated water tank;
A carbon dioxide supply valve for controlling the supply of carbon dioxide to the carbonated water tank;
An input unit for selecting a concentration of the carbonated water from a user;
And a controller for supplying the purified water to the carbonated water tank and generating the carbonated water by repeating the opening and closing of the carbon dioxide supplied valve when the supply of the purified water is completed,
Wherein the control unit changes the number of opening of the carbon dioxide valve according to the concentration of the carbonated water selected by the user. The method according to claim 1,
Wherein the controller increases the number of openings of the carbon dioxide supply valve as the concentration of carbonated water selected by the user increases. 3. The method of claim 2,
Wherein the control unit lengthens the closing time of the carbon dioxide as the number of opening of the carbon dioxide valve increases. A carbonated water tank for storing carbonated water;
A water tank for supplying purified water to the carbonated water tank;
A carbon dioxide cylinder for supplying carbon dioxide to the carbonated water tank;
An input unit for selecting a concentration of the carbonated water from a user;
A display unit for displaying the concentration of the carbonated water selected by the user;
And a control unit for supplying the purified water to the carbonated water tank and supplying the carbon dioxide at least once when the purified water is supplied and generating the carbonated water by stopping the supply of the carbon dioxide at least once in order to dissolve the supplied carbon dioxide ,
Wherein the control unit changes the supply frequency of the carbon dioxide according to the concentration of the carbonated water selected by the user. 5. The method of claim 4,
Further comprising a display unit for displaying the concentration of the carbonated water selected by the user,
Wherein the control unit controls the display unit to display the concentration of the selected carbonated water. 6. The method of claim 5,
Wherein the control unit intermittently supplies the carbon dioxide tank to the carbonated water tank by repeating the supply of the carbon dioxide and the supply of the carbon dioxide during the production of the carbonated water. The method according to claim 6,
Wherein the controller increases the number of times the carbon dioxide is supplied as the concentration of the carbonated water selected by the user increases. 8. The method of claim 7,
Wherein the control unit lengthens the time for stopping the supply of the carbon dioxide as the number of times of supply of the carbon dioxide increases. 5. The method of claim 4,
Wherein the controller supplies the carbon dioxide at least once within 4 to 8 seconds according to the concentration of the carbonated water selected by the user. 5. The method of claim 4,
Wherein the control unit stops the supply of the supplied carbon dioxide at least once for 2 to 18 minutes after supplying the carbon dioxide. A control method of a refrigerator including a carbonated water tank for generating and storing carbonated water,
Selecting the concentration of carbonated water from the user;
Supplying the purified water to the carbonated water tank;
When the supply of the purified water is completed, the carbon dioxide is supplied to the carbonated water tank at least once,
And stopping the supply of the carbon dioxide at least once to dissolve the supplied carbon dioxide,
Wherein the supplying of the carbon dioxide at least once includes varying the number of times of supply of the carbon dioxide according to the concentration of the selected carbonic acid water. 12. The method of claim 11,
And displaying the concentration of the selected carbonic acid water. 12. The method of claim 11,
Wherein the difference in the number of times of supplying the carbon dioxide includes increasing the number of times the carbon dioxide is supplied as the concentration of the selected carbonic acid water is higher. 14. The method of claim 13,
Wherein the stopping of the supply of the carbon dioxide at least once includes increasing the time for stopping the supply of the carbon dioxide as the number of times of supplying the carbon dioxide increases. 12. The method of claim 11,
Wherein the supplying of the carbon dioxide at least once comprises supplying the carbon dioxide at least once within 4 to 8 seconds depending on the concentration of the carbonated water selected by the user. 12. The method of claim 11,
Wherein the at least one stop of the supply of carbon dioxide comprises stopping the supply of the supplied carbon dioxide at least once for 2 to 18 minutes after supplying the carbon dioxide.

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