The present disclosure relates to a drip coffee machine, and more particularly, to an automatic drip coffee machine.
The present disclosure is derived from research conducted by Noble Tree Co., Ltd. as part of the Ministry of Small and Medium Venture Enterprises (Startup Growth Technology Development Project). [Research period: 2020.07.31˜2021.07.30, Research management organization: Small and Medium Technology Information Promotion Agency, Research project name: Development of spout stand-alone intelligent automatic drip machine (3 units), Project identification number: S2856246].
Drip coffee refers to coffee made by pouring hot water (or boiling water) on finely ground coffee beans. Drip coffee has the disadvantage that a person has to take the time to pour hot water into a dripper including a filter containing ground coffee, which makes it difficult for coffee shops and cafes to provide services due to lack of manpower and differences in individual skills. In order to improve a method of making hand drip coffee, an automatic drip coffee machine was proposed.
In general, when extracting drip coffee, the temperature of hot water to be extracted varies with a degree of roasting or grinding of coffee, a type of coffee, and a density, and the hot water in a kettle gradually cools down during an extraction process so that the temperature of hot water may cool down at each extraction stage. Therefore, when extracting drip coffee, precise temperature control of hot water according to extraction stages and coffee conditions determines the extraction quality.
However, an automatic drip coffee machine in the related art includes one boiler, thereby making it impossible to control the temperature according to the conditions of coffee, and thus, it is difficult to extract drip coffee of good quality. In addition, the automatic drip coffee machine in the related art not only does not precisely control the temperature or flow rate of the hot water supplied to a dripper, but also is difficult to precisely control a drip pattern of the hot water supplied to the dripper, which may deteriorate the quality of drip coffee, for example, the flavor, etc.
The present disclosure provides an automatic drip coffee machine capable of precisely controlling the temperature or flow rate of hot water supplied to a plurality of drippers.
The present disclosure also provides an automatic drip coffee machine capable of precisely controlling a drip pattern of hot water supplied to a plurality of drippers.
According to an embodiment, an automatic drip coffee machine of the present disclosure includes a water heater system including a high-temperature water boiler, and a medium-temperature water boiler disposed away from the high-temperature water boiler, and a drip system including a plurality of drip nozzles configured to receive mixed hot water of a desired temperature by high-temperature water heated by mixing the high-temperature water boiler and medium-temperature water heated by the medium-temperature water boiler, and a plurality of drip nozzle transfer modules configured to respectively supply the mixed hot water to a plurality of drippers while respectively transferring the plurality of drip nozzles in an X-axis direction and a Y-axis direction.
The water heater system includes a water heater control unit configured to control the high-temperature water boiler and the medium-temperature water boiler, and the drip system includes a plurality of user interface units configured to control the plurality of drip nozzles and the plurality of drip nozzle transfer modules, and a main control unit configured to control the water heater control unit and the plurality of user interface units.
According to an embodiment, an automatic drip coffee machine of the present disclosure includes a high-temperature water boiler, and a medium-temperature water boiler disposed away from the high-temperature water boiler and a drip system including a plurality of drip nozzles configured to receive mixed hot water of a desired temperature by high-temperature water heated by mixing the high-temperature water boiler and medium-temperature water heated by the medium-temperature water boiler, and a plurality of drip nozzle transfer modules configured to respectively supply the mixed hot water to a plurality of drippers while respectively transferring the plurality of drip nozzles in an X-axis direction and a Y-axis direction.
The water heater system includes a plurality of high-temperature water discharge pipes configured to discharge high-temperature water heated by the high-temperature water boiler, a plurality of medium-temperature water discharge pipes configured to discharge medium-temperature water heated by the medium-temperature water boiler, a plurality of high-temperature water pumps respectively connected to the plurality of high-temperature water discharge pipes, a plurality of medium-temperature water pumps respectively connected the plurality of medium-temperature water discharge pipes, a plurality of high-temperature water supply pipes respectively connected to the plurality of high-temperature water pumps, a plurality of medium-temperature water supply pipes respectively connected to the plurality of medium-temperature water pumps, a plurality of mixing connectors connected to the plurality of high-temperature water supply pipes and the plurality of medium-temperature water supply pipes, and a plurality of hot water supply pipes respectively connected to the plurality of mixing connectors. The drip system includes a plurality of user interface units configured to respectively control the plurality of drip nozzles and the plurality of drip nozzle transfer modules.
The automatic drip coffee machine of the present disclosure may include the high-temperature water boiler and the medium-temperature water boiler, thereby precisely controlling the temperature of hot water supplied to drippers as well as include various valves, thereby precisely controlling the flow rate of hot water. Accordingly, the automatic drip coffee machine of the present disclosure may increase the quality of drip coffee, for example, flavor.
The automatic drip coffee machine of the present disclosure may include a plurality of drippers, thereby easily handling even many customers coming to coffee shops or cafes. The automatic drip coffee machine of the present disclosure may be very helpful in operations of coffee shops and cafes, and also reduce the making cost of drip coffee.
The automatic drip coffee machine of the present disclosure may precisely control drip patterns of hot water supplied to the drippers. Accordingly, the automatic drip coffee machine of the present disclosure may accommodate respective drip patterns of users and make drip coffee according to drip conditions set by the users.
Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The following embodiments of the present disclosure may be implemented only in any one of the embodiments, and the following embodiments may be implemented in combination with one or more of the embodiments. Therefore, the present disclosure is not construed as limited to one embodiment.
In this specification, singular form of the components may include plural forms, unless the context clearly indicates otherwise. In this specification, the drawings are exaggerated to illustrate the present disclosure more clearly.
Specifically, the automatic DCM may include a drip system 4, a water heater system 7, and a plurality of high-temperature water supply pipes 8 connecting the water heater system 7 to the drip system 4. The drip system 4 may mean a drip coffee extraction system.
The drip system 4 may be located on a table 1. The table 1 may be the floor on which the drip system 4 is located. The drip system 4 may include a plurality of drippers 2 and a plurality of drip nozzle transfer modules 3. In the drip system 4, one dripper and one drip nozzle transfer module may be configured as a set
The water heater system 7 may be located at the bottom of the table 1. The water heater system 7 may include a high-temperature water boiler 5, and a medium-temperature water boiler 6 disposed away from the high-temperature water boiler 5. The high-temperature water boiler 5 may be a boiler that heats cold water (or room temperature water) to a high temperature, for example, 85° C. to 98° C., to supply high-temperature water. The medium-temperature water boiler 6 may be a boiler that heats cold water to a medium temperature lower than a high temperature, for example, 70° C. to 84° C., to supply medium-temperature water. The medium-temperature water boiler 6 may be referred to as a low-temperature water boiler as a concept in contrast to the high-temperature water boiler 5. Hereinafter, high-temperature water may mean hot water of 85° C. to 98° C., and medium-temperature water may mean hot water of 70° C. to 84° C.
Hot water mixed with high-temperature water and medium-temperature water made by the water heater system 7 may be supplied to the drip system 4 through the plurality of high-temperature water supply pipes 8. The water heater system 7 may include the high-temperature water boiler 5 and the medium-temperature water boiler 6 to control flow rate of high-temperature water and medium-temperature water, thereby precisely controlling the temperature of hot water supplied to the drip system 4. In the present embodiment, the high-temperature water supply pipes 8 are five for convenience. The five high-temperature water supply pipes 8 may be supplied to the five drippers 2.
Configurations of the drip system 4, the water heater system 7, and the high-temperature water supply pipes 8 are described below in more detail. The configurations of the drip system 4, the water heater system 7, and the high-temperature water supply pipes 8 described below are intended to implement the spirit of the present disclosure, and the present disclosure is not limited to the following configurations.
Specifically, the drip system 4 of the automatic DCM of
Support portions 117 may be installed around the body portion 108. The support portions 117 may separate the body portion 108 from the table 1 of
The lower body portion 102 may have an X-Y plane (X-Y horizontal plane) in a horizontal direction (X-axis direction and Y-axis direction) with respect to the floor supported by the table 1 of
A drip container 116 may be installed in a container seating portion 103 of the lower body portion 102. The drip container 116 may contain drip coffee. A first drain portion 110 discharging drip coffee overflowing from the drip container 116 or hot water erroneously discharged from the drip nozzle 240 may be installed around the container seating portion 103.
The dripper holder 114 may be mechanically connected to the middle body portion 104. The dripper holder 114 may be attachable to and detachable from the middle body portion 104. A dripper holder groove 114a and a dripper support 113 may be installed in the dripper holder 114. A dripper 112 may be installed in the dripper holder 114 on the drip container 116, that is, the dripper support 113 installed in the dripper holder groove 114a.
The dripper 112 may correspond to the drippers 2 of
In
A plurality of drip nozzles 240 receiving hot water made from the high-temperature water boiler 5 in
The drip system 4 may include the drip nozzle transfer modules 3 of
The drip system 4 may include a plurality of user interface units 118 controlling the drip nozzles 240 and the drip nozzle transfer modules 3 of
As described above, the drip system 4 of the automatic DCM of
The automatic DCM of
The drip system 4 of the automatic DCM of
In addition, the drip system 4 of the automatic DCM of
Specifically, as shown in
As shown in
As shown in
Specifically, the water heater system 7 of the automatic DCM of
Cold water supplied from a cold water supply source 138 through a cold water inlet 140 may be supplied to the high-temperature water boiler tank 134 through a first cold water supply pipe 142. A first cold water control valve 146, for example, a solenoid valve, may be connected to the first cold water supply pipe 142 to adjust a cold water supply amount or a cold water supply speed.
Cold water supplied from the cold water supply source 138 through the cold water inlet 140 may be supplied to the medium-temperature water boiler tank 136 through a second cold water supply pipe 144. A second cold water control valve 148, for example, a solenoid valve, may be connected to the second cold water supply pipe 144 to adjust the cold water supply amount or the cold water supply speed. The first cold water control valve 146 and the second cold water control valve 148 may be controlled by the user interface unit 118 of
The high-temperature water boiler tank 134 may heat cold water to discharge high-temperature water. The high-temperature water discharged from the high-temperature water boiler tank 134 may be discharged through a plurality of high-temperature water discharge pipes 150, for example, five high-temperature water discharge pipes 150, as shown in
A plurality of high-temperature water pumps 154 may be connected to the high-temperature water discharge pipes 150 as shown in
The high-temperature water supply pipes 157a and the medium-temperature water supply pipes 157b may be connected to a plurality of mixing connectors 158, e.g., five mixing connectors 158. The mixing connectors 158 may each be Y-shaped. Accordingly, the high-temperature water supplied to the high-temperature water supply pipes 157a and the medium-temperature water supplied to the medium high-temperature water supply pipes 157b may be mixed to discharge hot water of the desired temperature.
A plurality of first hot water supply pipes 160, such as five first hot water supply pipes 160, may be connected to the mixing connectors 158. Hot water supplied to the hot water supply pipes 160 may be supplied to second hot water supply pipes 166, such as five second hot water supply pipes 166, through hot water control valves 165, such as solenoid valves. The hot water control valves 165 may be controlled by the user interface unit 118 in
In
As shown in
The water heater system 7 may include a water heater control unit 168 controlling the high-temperature water boiler 5 and the medium-temperature water boiler 6. The water heater control unit 168 may control various elements included in the high-temperature water boiler 5 and the medium-temperature water boiler 6. The water heater system 7 may include an alternating current control unit 170 applying current to heating wires included in the high-temperature water boiler 5 and the medium-temperature water boiler 6.
Specifically, the water heater system 7 of the automatic DCM of
A plurality of hot wires 180 and 182, i.e., the first heating wire 180 and the second heating wire 182, in the high-temperature water tank 134 may be located in the high-temperature water boiler 5. The first heating wire 180 and the second heating wire 182 are physically spaced apart from each other and electrically connected to each other. The first heating wire 180 and the second heating wire 182 may be connected to a wiring line 186 installed from the top.
A plurality of high-temperature water outlets 185 discharging high-temperature water may be installed in the high-temperature water tank 134. The high-temperature water discharge pipes 150 of
A first cold water temporary storage space 197a separated by a first separation plate sp1 may be provided in a lower portion of the high-temperature water tank 134. The reasons for installing the first cold water temporary storage space 197a are as follows. When cold water (or room temperature water) comes into direct contact with the first and second heating wires 180 and 182, a temperature drop phenomenon occurs due to high-temperature water located at the top of the high-temperature water tank 134 and cold water located at the bottom thereof, and the temperature is equalized due to convection only over time. Cold water introduced to reduce the effect of temperature drop due to the introduction of cold water and a temperature difference inside the high-temperature water tank 134 is supplied to the first cold water temporary storage space 197a. First holes h 1 are drilled in an upper portion of the first cold water temporary storage space 197a so that cold water is slowly mixed into the high-temperature water tank 134, thereby reducing a temperature change inside the high-temperature water tank 134.
The first cold water supply pipe 142 and the first drainage pipe 143 may be installed in the lower portion of the high-temperature water tank 134. Accordingly, when the high-temperature water boiler 5 is repaired or is not used for a long time, drainage is possible, thereby preventing freezing of the high-temperature water tank 134 or the occurrence of scale.
Specifically, the water heater system 7 of the automatic DCM of
One third heating wire 190 in the medium-temperature water tank 136 may be located in the medium-temperature water boiler 6. The third heating wire 190 may be connected to a wiring line 192 installed from the top. A plurality of medium-temperature water outlets 194 discharging medium-temperature water may be installed in the medium-temperature water tank 136. The medium-temperature water discharge pipes 152 of
A second cold water temporary storage space 197b separated by a second separation plate sp2 is provided in a lower portion of the medium-temperature water tank 136. Second holes h 2 may be installed in the second separation plate sp2. The reasons for installing the second cold water temporary storage space 197b are the same as the first cold water temporary storage space 197a described above, and thus, a description thereof is omitted herein. The second cold water supply pipe 144 and the second drainage pipe 145 may be installed in the lower portion of the medium-temperature water tank 136. Accordingly, when the medium-temperature water boiler 6 is repaired or is not used for a long time, drainage is possible, thereby preventing freezing of the medium-temperature water tank 136 or the occurrence of scale.
Specifically,
The drip system 4 of the present disclosure may include the plurality of drip nozzle transfer modules 3. In other words, the plurality of drip nozzle transfer modules 3 corresponding to the drippers 2 of
In addition, the drip nozzle transfer module 3 may include a drip nozzle 240. The high-temperature water supply pipe 166 of
As shown in
When the drip nozzle 240 includes the fixing member 240a, a drop distance of hot water supplied from the drip nozzle 240 to the dripper 112 of
The Y-axis transfer module 212 may transfer the drip nozzle 240 in the Y-axis direction along a Y-axis transfer screw 220 on the horizontal plane with respect to the floor supported by the table 1 of
The Y-axis transfer module 212 and the X-axis transfer module 210 may operate independently to transfer the drip nozzle 240 in the Y-axis and/or X-axis directions. The X-axis transfer module 210 is installed at one end of the Y-axis transfer module 212, thereby easily transferring the drip nozzle 240 in the Y-axis direction and the X-axis direction smoothly without axial resistance.
As shown in
Here, with reference to
The Y-axis transfer module 212 may include a base plate 214 extended in the Y-axis direction. The base plate 214 may be installed horizontally with respect to the floor supported by the table 1 of
The Y-axis transfer module 212 may include a Y-axis transfer motor 222 fixed to a Y-axis motor support member 218 and installed on the base plate 214. The Y-axis transfer motor 222 is mechanically connected to the Y-axis transfer screw 220 extending to the Y-axis. The Y-axis transfer screw 220 is mechanically connected to a Y-axis screw support member 216 on the base plate 214.
The Y-axis transfer module 212 includes a Y-axis transfer member 226 extending in the X-axis direction and mechanically connected to the Y-axis transfer screw 220, and a Y-axis guide lane member 224 guiding the Y-axis transfer member 226 on the base plate 214. The Y-axis guide lane member 224 may be a bar type guide member.
An opening into which the Y-axis transfer screw 220 is inserted is installed in one side of the Y-axis transfer member 226, and thus, the Y-axis transfer member 226 and the Y-axis transfer screw 220 may be mechanically connected to each other. The Y-axis guide lane member 224 extends in the Y-axis direction. A Y-axis flywheel 215 that suppresses rotational vibration is installed in the Y-axis feed screw 220. In addition, a guide bearing 225 may be installed on the Y-axis guide lane member 224 to reduce vibration and twisting when the Y-axis transfer member 226 moves to the Y-axis.
The X-axis transfer module 210 includes an X-axis transfer motor 236 fixed to an X-axis motor support member 228 in the X-axis direction perpendicular to the Y-axis transfer member 226. The X-axis transfer motor 236 is mechanically connected to the X-axis transfer screw 232. An X-axis flywheel 217 that suppresses rotational vibration is installed in the X-axis transfer screw 232. The X-axis transfer screw 232 is mechanically connected to the X-axis screw support member 230 in the X-axis direction perpendicular to the Y-axis transfer member 226.
The X-axis feed module 210 includes a drip nozzle support member 238 mechanically connected to the X-axis transfer screw 232 and an X-axis guide lane member 234 spaced apart from the X-axis transfer screw 232 to guide the X-axis transfer screw 232. The drip nozzle 240 may penetrate the drip nozzle support member 238 up and down and be installed in the Z axis direction. The X-axis guide lane member 234 may be a cylindrical member.
An opening into which the X-axis transfer screw 232 is inserted is installed in one side of the drip nozzle support member 238, and thus, the drip nozzle support member 238 and the X-axis transfer screw 232 may be mechanically connected to each other. In addition, an opening into which the X-axis guide lane member 234 is inserted is provided in one side of each of the drip nozzle support member 238 and the X-axis screw support member 230, so that the X-axis guide lane member 234 may guide the X-axis transfer screw 232. The X-axis guide lane member 234 may reduce vibration and twisting when the drip nozzle 240 moves to the X-axis.
As shown in
Specifically, the drip system 4 of
The user interface unit 118 may control water outflow control valves 146 and 148. The water outflow control valves 146 and 148 may respectively correspond to the first cold water control valve 146 and the second cold water control valve 148 of
The user interface unit 118 may control an illumination unit 312 and the status display unit 119. The illumination unit 312 may indicate whether the user interface unit 118 is operating. The status display unit 119 may inform an extraction start of drip coffee, an extraction end of drip coffee, and an extraction state of drip coffee by colors.
The user interface unit 118 may control drive motors 222 and 236 and limit switches 242 and 244. The drive motors 222 and 236 may correspond to the X-axis and Y-axis transfer motors 222 and 236 of the drip nozzle transfer module 3 of
The user interface unit 118 may input, store, modify, inquire and delete an extraction recipe related to extraction of drip coffee. The user interface unit 118 may control the drippers 112 of
The user interface unit 118 may be electrically connected to the main control unit 302. The main control unit 302 may control a main alarm unit 306, the weight measurement unit 124, and the hot water control valve 165. The main alarm unit 306 may include a speaker informing an operation state of the main control unit 302.
The weight measurement unit 124 may measure the weight (or load) of drip coffee included in the drip container 116 of
The main control unit 302 may control an information input/output unit 304, external connection units 120 and 122, and a data storage unit 310. The information input/output unit 304 may be a device, for example, a keyboard, that inputs parameters for controlling the main control unit 302. In some embodiments, the information input/output units 304 may be provided as many times as the user interface units 118.
The external connection units 120 and 122 may respectively correspond to the connection terminals 120 and 122 of
The main control unit 302 may control the entire function of the automatic DCM of
The main control unit 302 may access an Internet server to inquire a drip coffee extraction performance or the operation status of the automatic DCM of
Specifically, the water heater system 7 of
The water heater control unit 168 may control the temperature display unit 320, the hot water pumps 154 and 156, and the temperature sensors 184 and 196. The temperature display unit 320 may display the temperature of each of the high-temperature water boiler 5 of
The water heater control unit 168 may control the water level detection sensors 172, 174, 189, 191, the cold water control valves 146 and 148, and the AC control unit 170. The water level detection sensors 172, 174, 189, and 191 may include the water level detection sensors 172 and 174 of the high-temperature water boiler 5 of
An AC power supply unit 318 may be connected to the AC control unit 170. The AC power supply unit 318 may be connected to the first heating wire 180 and the second heating wire 182 (or high-temperature water boiler heating wires) of the high-temperature water boiler 5 of
Specifically, the automatic DCM of
High-temperature water is introduced into the high-temperature water pump 154 through the high-temperature water discharge pipe 150, and medium-temperature water is discharged to the medium-temperature water pump 156 through the medium-temperature water discharge pipe 152. As described above, a plurality of high-temperature water discharge pipes 150 are provided, and a plurality of high-temperature water pumps 154 are also provided in response to the plurality of high-temperature water discharge pipes 150. Like the plurality of high-temperature water discharge pipes 150, a plurality of medium-temperature water discharge pipes 152 are provided, and a plurality of medium-temperature water pumps 156 are also provided in response to the plurality of medium-temperature water discharge pipes 152.
The high-temperature water pumped by using the high-temperature water pump 154 may be introduced into the mixing connector 158 through the high-temperature water supply pipe 157a. The medium high-temperature water pumped by using the medium-temperature water pump 156 may be introduced into the mixing connector 158 through the medium-temperature water supply pipe 157b. As described above, a plurality of mixing connectors 158 may be provided. The high-temperature water and the medium-temperature water introduced into the mixing connectors 158 may be mixed to make hot water of a desired temperature. A mixing ratio of the high-temperature water and the medium-temperature water may be determined according to a set temperature of hot water. The mixing ratio of the high-temperature water and the medium-temperature water may be determined by a program provided in a main control unit. For example, the mixing ratio of the high-temperature water and the medium-temperature water may be 3 to 1.
Hot water passing through the mixing connector 158 may be discharged to the drip nozzle 240 through the first hot water supply pipe 160 and the second hot water supply pipe 166. The hot water control valve 165 may be installed between the first hot water supply pipe 160 and the second hot water supply pipe 166. The first hot water supply pipe 160, the second hot water supply pipe 166, and the hot water control valve 165 may each be provided in plurality.
The hot water control valve 165 may be a solenoid valve having two flow paths, i.e., a two-way solenoid valve. An amount of hot water discharged to the drip nozzle 240 may be adjusted through on-off operations of the hot water control valve 165 or the operation time control of the hot water control valve 165.
Specifically, the hot water flow of
Hot water passing through the mixing connector 158 may be discharged to the drip nozzle 240 through first hot water supply pipe 160, the hot water control valve 165, and the second hot water supply pipe 166. In some embodiments, the temperature sensor 163 capable of measuring the temperature of hot water may be installed in the first high-temperature water supply pipe 160. The hot water circulation pipe 167 may further be connected to the hot water control valve 165. The hot water control valve 165 may be a solenoid valve having three flow paths, i.e., a three-way solenoid valve.
When the temperature of hot water measured by the temperature sensor 163 is low, the temperature of hot water may be increased by circulating hot water to the medium-temperature water boiler 6 through the hot water circulation pipe 167. The hot water circulation pipe 167 may be a hot water recovery pipe. An amount of hot water discharged to the drip nozzle 240 may be adjusted through on-off operations of the hot water control valve 165 or the operation time control of the hot water control valve 165.
Specifically, the method of making drip coffee described below may include a method of making drip coffee using one drip nozzle or a plurality of drip nozzles. The method of making drip coffee may include a high-temperature water circulation operation S400. The high-temperature water circulation operation S400 may be a preliminary operation for making drip coffee.
Only high-temperature water may be supplied to the hot water supply pipes 160 and 166 of
The method of making drip coffee may include a steaming hot water supply operation S410. The steaming hot water supply operation S410 supplies hot water of a first temperature, such as 90° C., to the hot water supply pipes 160 and 166 of
The hot water of the first temperature supplied through the hot water supply pipes 160 and 166 of
The method of making drip coffee may include a first drip hot water supply operation S420. The first drip hot water supply operation S420 supplies hot water of a second temperature, such as 87° C. or 90° C., to the hot water supply pipes 160 and 166 of
The hot water of the second temperature supplied through the hot water supply pipes 160 and 166 may be firstly supplied to the dripper 112 of
The method of making drip coffee may include a second drip hot water supply operation S430. The second drip hot water supply operation S430 supplies hot water of a third temperature, such as 85° C. or 90° C., to the hot water supply pipes 160 and 166 of
The hot water of the third temperature supplied through the hot water supply pipes 160 and 166 may be secondly supplied to the dripper 112 of
The method of making drip coffee may include a third drip hot water supply operation S440. The third drip hot water supply operation S440 supplies hot water of a third temperature, such as 80° C. or 90° C., to the hot water supply pipes 160 and 166 of
The hot water of the fourth temperature supplied through the hot water supply pipes 160 and 166 may be thirdly supplied to the dripper 112 of
Drip coffee may be made through such a drip coffee making process. In the present embodiment, the first to third drip hot water supply operations S420 to S440 are described as an example, but n (n is a positive integer) drip hot water supply operations may be used as necessary. In addition, the temperature or amount of hot water may be freely adjusted in each of drip hot water supply operations, thereby improving the quality of drip coffee.
The present disclosure may be applied to the field of coffee machine. In particular, the present disclosure may be applied to the field of automatic drip coffee machine.
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/KR2022/010780 | 7/22/2022 | WO |