Water outlets and kitchens

Abstract

To provide a water discharging device which can improve the accuracy in measured water discharge.SOLUTION: A water discharging device 1 includes a water discharging unit 10, a water quantity measurement unit 41, electric-operated on / off valves (a first on / off valve 21 and a second on / off valve 22), and a controller 50. The water discharging unit 10 includes flow passages (a water supply flow passage 71, a hot water supply flow passage 72, an outflow flow passage 73, and a purified water flow passage 81). The water quantity measurement unit 41 measures an output value based on the quantity of water flowing in the flow passages. The electric-operated on / off valves open / close the flow passages. The controller 50 controls the driving of the electric-operated on / off valves. The controller 50 performs measured water discharging control in which the electric-operated on / off valves are driven according to the output value (a measured output value Vr) from the water quantity measurement unit 41 so that a set water quantity Ws, which is set via operations on a water discharge quantity setting operation unit (a smart speaker 3), of water is discharged from the water discharging unit 10. The controller 50 includes a calibration information obtaining unit 53 which obtains calibration information on the water quantity measurement unit 41, and performs the measured water discharge control according to the output value from the water quantity measurement unit 41 which is calibrated using the calibration information.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a water discharge device. [Background technology]

[0002] Patent Document 1 discloses a conventional water discharge device. This water discharge device includes a water outlet, a flow rate sensor, a first on-off valve, and a first control unit. In this water discharge device, the first control unit opens and closes the first on-off valve based on a user's voice operation to set the water discharge volume, and controls the discharge of water at the set volume from the water discharge outlet. The first control unit controls the first on-off valve based on the flow rate measured by the flow rate sensor so that a predetermined volume of water is discharged from the water discharge outlet. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-124691 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of Patent Document 1, the first control unit calculates a predicted time until the amount of water discharged from the water outlet reaches a predetermined amount based on the flow rate measured by the flow rate sensor, and controls the first on-off valve based on this predicted time. Flow rate sensors vary in measurement value due to differences in production tolerances and differences in water temperature, water pressure, etc., so there is a risk of measurement errors occurring.

[0005] The present disclosure has been made in consideration of the above-described conventional situation, and aims to provide a water discharge device that can improve the accuracy of metered water discharge. [Means for solving the problem]

[0006] A water discharge device according to one embodiment of the present disclosure comprises a water discharge section having a flow path formed therein, a water volume measuring section that measures an output value corresponding to the volume of water flowing through the flow path, an electric on-off valve that opens and closes the flow path, and a control section that controls the operation of the electric on-off valve, wherein the control section acquires information regarding the set water volume that is set by operating a water discharge volume setting operation section that sets the volume of water to be discharged from the water discharge section, and performs metered water discharge control that drives the electric on-off valve based on the output value measured by the water volume measuring section so as to discharge the set volume of water from the water discharge section, and the control section has a calibration information acquisition section that acquires calibration information for the water volume measuring section, and performs the metered water discharge control based on the output value measured by the water volume measuring section calibrated by the calibration information. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a diagram showing a schematic configuration of a water discharge device according to an embodiment. [Figure 2] 1 is a diagram showing a schematic configuration of a water discharge device according to an embodiment. [Figure 3] 1 is a block diagram illustrating a schematic configuration of a water discharge device according to an embodiment. [Figure 4] 10 is a graph illustrating a delay in stopping water discharge during metered water discharge. [Figure 5] 10 is a flowchart for explaining metered water discharge control according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] The water discharger 1 according to this embodiment is installed on a kitchen sink. The water discharger 1 is a so-called automatic faucet. The water discharger 1 can perform automatic water discharge in the same manner as conventional water dischargers by detecting the user's hand or the like with a sensor. In addition, the water discharger 1 can perform metered water discharge, discharging an arbitrary amount of water set by the user.

[0009] As shown in Figures 1 and 2, the water discharge device 1 includes a water discharge section 10, a first on-off valve 21, a second on-off valve 22, a first sensor 31, a second sensor 32, a third sensor 33, a water volume measuring section 41, a water temperature measuring section 42, a control section 50, and a water purification cartridge 60.

[0010] As shown in Figures 1 and 2, the water discharge unit 10 has a main body 11, a discharge pipe 12, and a lever handle 13. The main body 11 is placed on a flat installation surface S, such as the counter top of a sink. A mixing valve 14 is disposed inside the main body 11. The mixing valve 14 mixes cold water and hot water supplied from a water supply flow path 71 and a hot water supply flow path 72 in a desired ratio in response to operation of the lever handle 13, and discharges the mixed hot and cold water into an outlet flow path 73. The water supply flow path 71, the hot water supply flow path 72, and the outlet flow path 73 are each examples of flow paths according to the present disclosure.

[0011] The water supply flow path 71 supplies water supplied from a water supply piping such as a water pipe (not shown) to the mixing valve 14. A stop valve 74 and a check valve 75 are provided upstream of the water supply flow path 71. The hot water supply flow path 72 supplies hot water supplied from a hot water source such as a water heater (not shown) to the mixing valve 14. A stop valve 76 and a check valve 77 are provided upstream of the hot water supply flow path 72. The outflow flow path 73 connects from the mixing valve 14 to the outlet 12A at the tip of the discharge pipe 12. The outflow flow path 73 is provided with a first opening / closing valve 21, a water temperature measuring unit 42, and a water volume measuring unit 41 in this order from the upstream end, which is the connection point with the mixing valve 14.

[0012] The first on-off valve 21 opens and closes the outflow flow path 73 as a flow path. The first on-off valve 21 is an electric on-off valve that is driven and controlled by the control unit 50. In this embodiment, the first on-off valve 21 is a solenoid valve. The water temperature measurement unit 42 measures the temperature of the water flowing through the outflow flow path 73. The water temperature measurement unit 42 is configured with a thermistor whose electrical resistance value changes in response to temperature changes. The water temperature measurement unit 42 measures the water temperature based on the resistance value of electricity flowing through the thermistor. The water temperature measurement unit 42 outputs a signal indicating the measured water temperature to the control unit 50.

[0013] The water volume measuring unit 41 measures an output value corresponding to the volume of water flowing through the outflow flow path 73. The water volume measuring unit 41 is configured with a water wheel type flow sensor. The water flowing through the outflow flow path 73 rotates the water wheel of the flow sensor, and a pulse signal is generated in response to the rotation. The water volume measuring unit 41 outputs this pulse signal to the control unit 50 as an output value.

[0014] A connection part 78 is provided in the outflow flow path 73 between the first on-off valve 21 and the water temperature measuring part 42. The downstream end of a purified water flow path 81 is connected to the connection part 78. The purified water flow path 81 is connected at its upstream end to a branch part 79 in the water supply flow path 71. The branch part 79 is provided downstream of the stop valve 74 in the water supply flow path 71 and upstream of the check valve 75. The purified water flow path 81 is an example of a flow path according to the present disclosure.

[0015] The purified water flow path 81 reforms water introduced from the water supply flow path 71 by passing it through the water purification cartridge 60, and then discharges the reformed water as purified water into the outflow flow path 73. The purified water flow path 81 is provided with, in order from upstream to downstream, a constant flow valve 82, a second on-off valve 22, the water purification cartridge 60, and a check valve 83. The constant flow valve 82 adjusts the flow rate in the purified water flow path 81 to a constant flow rate. The second on-off valve 22 opens and closes the purified water flow path 81. The second on-off valve 22 is an electrically operated on-off valve similar to the first on-off valve 21, and is driven and controlled by the control unit 50. The purified water cartridge 60 is detachably attached to the purified water flow path 81.

[0016] The water purification cartridge 60 can be selected from multiple types of cartridges depending on the modification content, such as differences in the components to be filtered. The water discharger 1 has a function to register which type of water purification cartridge 60 is installed. Different types of water purification cartridges 60 have different pressure losses when water passes through them. By registering the type of water purification cartridge 60, the water discharger 1 performs metering taking into account the pressure loss for each type of water purification cartridge 60. The type of water purification cartridge 60 can be registered in various ways, such as by using a dedicated application on the smartphone 4 (described later) to read a barcode or two-dimensional code, selecting from multiple options, directly entering the model number, or by using a reader function that reads information about the type from a semiconductor chip such as an IC chip built into the water purification cartridge.

[0017] The water discharge pipe 12 is rotatably supported at its base end by the main body 11. The water discharge pipe 12 has a so-called gooseneck-shaped outer shape that extends in an arc from the base end to the tip. An outflow flow path 73 that continues from the mixing valve 14 is formed inside the water discharge pipe 12. A water discharge outlet 12A is formed at the tip of the water discharge pipe 12. The water discharge outlet 12A is located at the downstream end of the outflow flow path 73. The water discharge outlet 12A discharges water downward toward the water discharge area A.

[0018] A first sensor 31, a second sensor 32, a third sensor 33, and a switch 34 are arranged on the water discharge pipe 12. Each of the sensors 31, 32, and 33 is a non-contact sensor that detects whether a detection target, such as a user's hand, is within the respective detection area. Each of the sensors 31, 32, and 33 outputs a signal indicating the detection result to the control unit 50. The first sensor 31, the second sensor 32, and the third sensor 33 are each an example of a water discharge start operating unit according to the present disclosure. The signal output from each of the sensors 31, 32, and 33 to the control unit 50 corresponds to information regarding a water discharge start instruction according to the present disclosure.

[0019] The first sensor 31 is disposed adjacent to the water outlet 12A at the tip of the water discharge pipe 12. The first sensor 31 has a detection area A1 that faces downward from the tip of the water discharge pipe 12. The detection area A1 of the first sensor 31 includes part of the water discharge area A from the water outlet 12A. The first sensor 31 is a sensor for discharging hot water (raw water) that passes through the mixing valve 14 from the cold water supply source and the hot water supply source. The first sensor 31 is of a so-called momentary operation type that outputs a signal only while a detection target, such as a user's hand, is within the detection area A1.

[0020] The second sensor 32 and the third sensor 33 are each provided above the downwardly curved and hanging portion of the discharge pipe 12. The second sensor 32 and the third sensor 33 are arranged side by side along the extension direction of the discharge pipe 12. The second sensor 32 and the third sensor 33 each have a detection area above the discharge pipe 12. Like the first sensor 31, the second sensor 32 is a sensor for discharging raw water. The second sensor 32 is a so-called alternate operation type that switches between discharging and stopping water each time a detection target such as a user's hand enters or leaves the detection area. The third sensor 33 is a sensor for discharging purified water that passes from the water supply source through the water purification cartridge 60 of the purified water flow path 81. Like the second sensor 32, the third sensor 33 switches between discharging and stopping purified water using alternate operation. The switch 34 switches the first sensor 31 on and off.

[0021] The control unit 50 controls each part of the water discharge unit 10. The control unit 50 is mainly composed of a computer, for example, and is configured with an arithmetic device such as a CPU (Central Processing Unit). The control unit 50 has the function of being able to perform wireless communication in accordance with communication standards such as Wi-Fi (registered trademark) and BLE (Bluetooth (registered trademark) Low Energy).

[0022] 2 and 3, the control unit 50 is connected to each of the first sensor 31, the second sensor 32, the third sensor 33, the water volume measurement unit 41, the water temperature measurement unit 42, the first on-off valve 21, and the second on-off valve 22. As shown in FIG. 3, the control unit 50 is wirelessly connected to external devices such as a smart speaker 3, a smartphone 4, and an external server 6 via a router 2.

[0023] The router 2 can communicate wirelessly with the control unit 50 via Wi-Fi (registered trademark). The router 2 forms a local area network (LAN) centered around itself. In addition to the control unit 50, wireless communication devices such as a smart speaker 3 and a smartphone 4 are connected to the router 2. The router 2 can be connected to an external server 6 via a wide area communication network 5 such as the Internet.

[0024] The smart speaker 3 recognizes the voice uttered by the user and outputs a signal corresponding to the recognized operation instruction to the control unit 50 via the router 2. Various known methods can be used for voice recognition by the smart speaker 3. In this embodiment, the smart speaker 3 functions as a water discharge volume setting operation unit according to the present disclosure. In this embodiment, an example is given of a case where voice operation is performed on the smart speaker 3 as a water discharge volume setting operation for metered water discharge. The smart speaker 3 can also switch water discharge on and off by voice operation. In other words, the smart speaker 3 can also function as a water discharge start operation unit according to the present disclosure.

[0025] The smartphone 4 has an application for operating the water discharge device 1. This application has a function for inputting calibration information Ic of the water volume measurement unit 41, which will be described later, from a touch panel. The smartphone 4 outputs a signal according to the content of the input operation to the control unit 50 via the router 2. The smartphone 4 can also output a signal directly to the control unit 50 by BLE communication, without going through the router 2. This application has an input function for various operations in automatic water discharge and metered water discharge. As a result, the smartphone 4 can also function as a water discharge start operation unit and a water discharge volume setting operation unit according to the present disclosure. The smartphone 4 has an input function for information used to generate correction information Ir, which will be described later, for metered water discharge. The smartphone 4 can also perform voice operations similar to those of the smart speaker 3.

[0026] The external server 6 is connected to the router 2 via the wide area communication network 5. The external server 6 can store various data that can be referenced by the water discharge device 1, such as data tables and algorithms used to calculate the set output value Vs during metered water discharge. The water discharge device 1 can connect to the external server 6 via the router 2 and the wide area communication network 5 as needed to reference the stored data.

[0027] The control unit 50 executes drive control of the first on-off valve 21 and the second on-off valve 22. The control unit 50 executes automatic water discharge control. In the automatic water discharge control, the control unit 50 receives a water discharge start instruction signal transmitted by operation of a water discharge start operation unit such as the first sensor 31, the second sensor 32, the third sensor 33, etc., and drives the first on-off valve 21 and the second on-off valve 22.

[0028] The control unit 50 executes metered water discharge control. The metered water discharge control is a control that measures and discharges a set water volume Ws set by the user. The set water volume Ws is the amount of water that the user actually wants to discharge in the metered water discharge, and is set by the user operating a water discharge volume setting operation unit on the smart speaker 3, smartphone 4, etc. The control unit 50 executes metered water discharge control when it acquires information related to the set water volume Ws.

[0029] In the automatic water discharge and metered water discharge of the water discharge device 1, it is possible to specify whether raw water or purified water is to be metered and discharged. In the case of automatic water discharge, a voice instruction such as "Dispense purified water" or "Dispense raw water" is issued to the smart speaker 3, which serves as the water discharge volume setting operation unit. This causes the smart speaker 3 to recognize the instruction, open the on-off valves 21, 22 corresponding to the type of water, and begin dispensing water. To stop the water, simply issue a voice instruction such as "Stop," and the water can be stopped regardless of the type of water being discharged.

[0030] For metered water dispensing, the type of water is specified along with the setting of the set water volume Ws. For example, when setting the set water volume Ws, voice instructions such as "Dispense 100cc of purified water" or "Dispense 1 liter of raw water" are issued to the smart speaker 3, which serves as the water volume setting operation unit. The smart speaker 3 recognizes the instructions and outputs information regarding the type of water and the set water volume Ws to the control unit 50. The control unit 50 sets the type of water and the set water volume Ws according to the acquired information.

[0031] In the case of this embodiment, in metered water discharge control, after the control unit 50 acquires information regarding a water discharge start instruction to start water discharge from the water discharge unit 10, it opens either the first on-off valve 21 or the second on-off valve 22 to start metered water discharge. That is, in metered water discharge control, at the time the control unit 50 acquires information regarding the set water volume Ws, the on-off valves 21, 22 are not opened, and water discharge from the water discharge unit 10 does not begin. In other words, in metered water discharge control, after the control unit 50 acquires a water discharge volume setting instruction regarding the set water volume Ws, it enters a state of waiting for input of a water discharge start instruction.

[0032] In this embodiment, the control unit 50, which has acquired information about the set water volume Ws, executes control to maintain the on-off valves 21 and 22 in a closed state even when a specific water discharge start operating unit is operated from among multiple water discharge start operating units, such as the first sensor 31, the second sensor 32, and the third sensor 33. For example, when metering and dispensing 100 ml of purified water, the control unit 50 executes control to maintain the first on-off valve 21 in a closed state even when the first sensor 31 and the second sensor 32, which serve as specific water discharge start operating units, are operated. That is, when metering and dispensing 100 ml of purified water, the control unit 50 starts dispensing only in accordance with the water discharge start command issued by the operation of the third sensor 33. Similarly, when metering and dispensing raw water, the on-off valves 21 and 22 are maintained in a closed state even when the first sensor 31 and the third sensor 33 are operated.

[0033] "Maintaining the valve closed state" may take any form as long as it prevents the electric on-off valve linked to a specific water discharge start operating unit from opening, such as, for example, ignoring a water discharge start instruction signal even if it is received from a specific water discharge start operating unit, or disabling the operation of the specific water discharge start operating unit itself so that the water discharge start instruction signal is not output, etc. In the present disclosure, the number of water discharge start operating units other than the specific water discharge start operating unit among the multiple water discharge start operating units, i.e., the number of water discharge start operating units that remain active after the set water volume Ws is set, may be one or more.

[0034] After the set water volume Ws for metered water dispensing is set, the first sensor 31 disables the water dispensing start instruction operation regardless of the water type. This is to prevent unexpected water dispensing during metered water dispensing, such as when water dispensing starts while you are about to place a container such as a cup below the water spout 12A because the detection area A1 of the first sensor 31 overlaps with part of the water dispensing area A from the water spout 12A. The second sensor 32 and the third sensor 33 are disabled according to the water type specified for metered water dispensing. This is to prevent water types other than the specified type from being dispensed. As mentioned above, the water dispensing start operation unit also includes the operation unit of the smart speaker 3, smartphone 4, etc. These water dispensing start operation units may function as water dispensing start operation units for metered water dispensing, or they may function as specific water dispensing start operation units that are ignored (disabled) during metered water dispensing.

[0035] In the metered water discharge control, the control unit 50 sets a set output value Vs. The set output value Vs is a value obtained by converting the set water volume Ws in the metered water discharge control into an output value of the water volume measuring unit 41. The set output value Vs is set based on the set water volume Ws. The set output value Vs is calculated by the control unit 50 taking into consideration the calibration information Ic and correction information Ir, which will be described later. The control unit 50 determines whether the set water volume Ws has been discharged by comparing the actual measured output value Vr, which is actually measured by the water volume measuring unit 41, with the set output value Vs, using this set output value Vs as a target value.

[0036] As shown in FIG. 3, the control unit 50 has a memory unit 51, an operation information acquisition unit 52, a calibration information acquisition unit 53, a water information acquisition unit 54, a correction information acquisition unit 55, a calculation unit 56, and an output unit 57. The memory unit 51 is configured to have a ROM (Read Only Memory), a RAM (Random Access Memory), etc. The memory unit 51 stores in advance system programs and the like that can control each functional unit in the water discharger 1. The memory unit 51 can store calibration information Ic, correction information Ir, water information Iw, etc., which will be described later. The memory unit 51 can store various settings for the water discharger 1.

[0037] The operation information acquisition unit 52 acquires operation information of the water discharger 1. The operation information is output by operating each operation unit, such as the first sensor 31, the second sensor 32, the third sensor 33, the smart speaker 3, the smartphone 4, etc. The operation information is information related to the operation of the water discharger 1, such as information regarding an instruction to start water discharge, information regarding an instruction to stop water discharge (stop water), information regarding an instruction to switch between water discharge and stop water discharge, and information regarding the set water volume Ws for metered water discharge. When the control unit 50 acquires this operation information, it executes drive control of the first on-off valve 21 and the second on-off valve 22.

[0038] The calibration information acquisition unit 53 acquires the calibration information Ic stored in the memory unit 51. The control unit 50 calibrates the water volume measurement unit 41 using the calibration information Ic acquired by the calibration information acquisition unit 53, and performs metered water discharge control based on the output value measured by the calibrated water volume measurement unit 41. The calibration information Ic is information for reducing measurement errors of the water volume measurement unit 41 that occur due to, for example, product errors of the flow sensor, seasonal differences in water temperature, differences in water pressure of the water supply source, pressure loss in the flow path, etc. The calibration information Ic can be updated as needed, such as seasonally. The calibration information Ic can be, for example, information based on actual measurements, information transmitted periodically, such as seasonally, from an external server, etc.

[0039] In this embodiment, the actual measurement for generating the calibration information Ic is performed by the user, contractor, or the like of the water discharger 1 as follows. First, the water discharger 1 performs metered water discharge, setting a predetermined amount of water, for example, 100 ml, as the set water volume Ws. The metered water discharge control by the control unit 50 is set so that the measurement is performed by converting the amount of water into an output value per predetermined unit of water volume, such as an initial setting of 1 pulse per ml. The control unit 50 sets a set output value Vs (for example, 100 pulses) by converting the set water volume Ws (for example, 100 ml) into an output value per unit of water volume, and performs metered water discharge control by counting until the actual output value Vr, which is the output value actually measured by the water volume measuring unit 41 after the valve is opened, reaches the set output value Vs, thereby determining that the set water volume Ws has been discharged.

[0040] Next, the actual amount of water obtained by the metered water discharge is measured using another measuring means, such as a scale. The value measured by the other measuring means is then input to the control unit 50. In this embodiment, the value actually measured by another measuring means other than the water volume measuring unit 41 is input to the control unit 50 via an application on the smartphone 4. The control unit 50 generates calibration information Ic based on the input actual measurement value. For example, suppose that metered water discharge is performed with a set water volume Ws of 100 ml, and the value of the actually discharged water measured by the other measuring means is 110 ml. The control unit 50 generates calibration information Ic by multiplying the initially set output value per unit water volume by a coefficient of 100 ml / 110 ml based on this actual measurement value of 110 ml and the set water volume Ws of 100 ml. The generated calibration information Ic is stored in the memory unit 51. This allows the setting of the output value per unit water volume of the water volume measuring unit 41 to be calibrated, thereby reducing measurement errors during metered water discharge.

[0041] The number of times that metered water discharge is performed to generate the calibration information Ic is preferably two times rather than once, three times rather than two, etc. When metered water discharge is performed multiple times, it is preferable that the set water volume for each time be different, such as 100 ml, 200 ml, or 300 ml. The calibration information Ic stored in the memory unit 51 may be reused every year depending on the season, etc.

[0042] The water information acquisition unit 54 acquires water information Iw. The water information Iw includes, for example, information related to the water volume in the metered water discharge, as well as information acquired from the water flowing through the water discharge device 1, such as the water temperature, water pressure, flow rate (amount of water flowing per unit time), and flow velocity of the water flowing through the flow paths 71, 72, and 73, as well as known information related to the water flowing through the water discharge device 1, such as the local water pressure and the type of water purification cartridge in use. In this embodiment, the water information Iw includes information related to the water volume based on the number of pulse signals output from the flow sensor, which is an output value from the water volume measurement unit 41; information related to the flow rate based on the interval between pulse signals; and information related to the water temperature based on the magnitude of the electrical resistance value of the thermistor, which is an output value from the water temperature measurement unit 42. In the case of metered discharge of purified water, the water information Iw also includes information related to the magnitude of pressure loss corresponding to the type of registered water purification cartridge 60. The acquired water information Iw is stored in the memory unit 51. The water information Iw acquired by the water information acquisition unit 54 is used to generate correction information Ir, which will be described later.

[0043] When executing the metered water discharge control, the control unit 50 controls the drive of the on-off valves 21, 22 based on the actual measured output value Vr, which is the output value measured by the water volume measurement unit 41, and the water temperature measured by the water temperature measurement unit 42. Specifically, when executing the metered water discharge control based on the output value measured by the water volume measurement unit 41, the control unit 50 executes the metered water discharge control while updating the set output value Vs in accordance with the water temperature measured by the water temperature measurement unit 42. During the metered water discharge control that is being executed, the control unit 50 executes feedback control that updates the set output value Vs, which is the target value for the actual measured output value Vr measured by the water volume measurement unit 41, in accordance with the water temperature each time.

[0044] For example, the viscosity and dynamic viscosity of water at 10°C and hot water at 60°C are significantly different. For example, Figure 4 is a graph showing the change in flow rate over time during metered water dispensing when dispensing the same set water volume Ws at different water temperatures. In the graph, the solid line indicates the change at high temperatures, and the dotted line indicates the change at low temperatures, and it can be seen that the magnitudes are different. Therefore, such differences in water temperature can significantly affect the pressure loss during flow through the flow path and the rotation of the water wheel in the flow sensor, resulting in metering errors. The control unit 50 measures the temperature of the water flowing through the flow path using the water temperature measurement unit 42 and executes metered water dispensing control while correcting the set output value Vs based on this water temperature. The water information Iw used to update the set output value Vs is not limited to water temperature, but may also include, for example, water pressure, the flow velocity of water in the flow path, and the differential pressure between the cold water supply flow path and the hot water supply flow path.

[0045] The control unit 50 generates correction information Ir based on the water information Iw acquired by the water information acquisition unit 54. The control unit 50 corrects the set output value Vs using the correction information Ir and changes the drive control of the first on-off valve 21 and the second on-off valve 22. The correction information Ir is stored in the memory unit 51 and acquired by the correction information acquisition unit 55. The correction information Ir is information for mitigating metering errors caused by a time lag (water stop delay) between the timing of transmitting a valve close signal and the timing from valve closure to actual water stop. In FIG. 4, the valve close signals are transmitted at timings C1 and C2, respectively. However, there is a time lag between the transmission of the valve close signal and the time the flow rate becomes zero. In other words, water continues to be discharged even after the valve close signal is transmitted. The correction information Ir is information for setting the set water volume Ws, taking into account this water stop delay and the water discharge volume after the valve close signal is transmitted. Specifically, when calculating the set output value Vs based on the set water volume Ws, the control unit 50 calculates the set output value Vs by subtracting in advance the number of pulse signals expected to be measured after the valve closing signal is transmitted based on the correction information Ir.

[0046] The water information Iw used to generate the correction information Ir includes, for example, the water volume, the type of water flowing through the flow path, the flow rate, the flow velocity, the water temperature, the type of water purification cartridge, etc. The correction information Ir is generated by referring to a data table that is prepared in advance for each piece of information on the water volume, the type of water, the flow rate, the flow velocity, the water temperature, the type of water purification cartridge, etc., and comparing this data table with the water information Iw that the water information acquisition unit 54 actually acquired.

[0047] The correction information Ir can be generated based on water information Iw acquired while either the first on-off valve 21 or the second on-off valve 22 is open, water information Iw acquired after a valve close signal is transmitted to either the first on-off valve 21 or the second on-off valve 22, or a combination of these pieces of water information Iw. The water information Iw acquired after a valve close signal is transmitted may simply be the number of pulse signals as an output value measured by the water volume measurement unit 41. In this case, when calculating the set output value Vs, the number of pulse signals acquired after the valve close signal is transmitted can be directly used as the number of pulse signals expected to be measured after the valve close signal is transmitted, making it extremely easy to calculate the set output value Vs.

[0048] The data table used to generate the correction information Ir may be stored in the external server 6, or may be stored in a storage means provided in the water discharger 1, such as the storage unit 51. The data table used to generate the correction information Ir may be one that has been created in advance, or may be created from water information Iw previously acquired by the water discharger 1. The data table used to generate the correction information Ir may be updated as needed using water information Iw acquired by the water discharger 1. The correction information Ir may be generated, for example, from an arithmetic formula based on the water information Iw.

[0049] The calculation unit 56 performs various calculations. Specifically, the calculation unit 56 performs various calculations such as converting the set water volume Ws set in metered water discharge into a set output value Vs, calibrating the output value per unit water volume in metered water discharge based on the calibration information Ic, correcting the set output value Vs based on the correction information Ir, and updating the set output value Vs based on the water information Iw.

[0050] The output unit 57 outputs valve open and valve close control signals to the first on-off valve 21 and the second on-off valve 22. In the case of automatic water discharge control, the valve open and valve close control signals are output in direct response to operation information from an operation unit equivalent to a water discharge start instruction operation unit such as each of the sensors 31, 32, 33, smart speaker 3, smartphone 4, etc. In the case of metered water discharge control, the valve open control signal is output in direct response to operation information from each of the above-mentioned water discharge start operation units. However, as described above, in metered water discharge control, the output of the valve open control signal is only permitted when operation information is acquired from a water discharge start operation unit other than a specific water discharge start operation unit.

[0051] The metered water discharge control by the control unit 50 will be described based on the flowchart shown in Fig. 5. In the following explanation, the metered water discharge control when discharging 100 cc of raw water passing through the mixing valve 14 will be described.

[0052] In the metered water discharge control, the control unit 50 first acquires the set water volume Ws in step S1. The set water volume Ws is set by the user operating the water discharge volume setting operation unit. Specifically, the set water volume Ws is set by the user of the water discharge device 1 issuing a voice instruction specifying the water volume to the smart speaker 3, which serves as the water discharge volume setting operation unit. In the case of metered water discharge that discharges 100 cc of raw water, the user of the water discharge device 1 issues a voice instruction such as, for example, "Dispense 100 cc of raw water." The smart speaker 3 recognizes the instruction and outputs information related to the set water volume Ws.

[0053] In this embodiment, when recognizing the instruction content, the smart speaker 3 also recognizes the type of water to be dispensed in the metered water dispensing. That is, in addition to recognizing the amount of water dispensed, the smart speaker 3 also recognizes whether raw water or purified water is to be dispensed. After recognizing the type of water, the smart speaker 3 outputs information on the set water volume Ws and the type of water as operation information to the operation information acquisition unit 52. The operation information acquisition unit 52 acquires information on the set water volume Ws and the type of water from the acquired operation information. The information on the set water volume Ws and the type of water acquired by the operation information acquisition unit 52 is stored in the memory unit 51.

[0054] The control unit 50 acquires the calibration information Ic and the correction information Ir in steps S2 and S3, respectively, and calculates the set output value Vs based on the calibration information Ic and the correction information Ir in step S4. The calibration information Ic and the correction information Ir are stored in the memory unit 51 and are acquired by the calibration information acquisition unit 53 and the correction information acquisition unit 55, respectively. As described above, the calibration information Ic is information for calibrating the water volume measurement unit 41, and the correction information Ir is information related to water stop delay. The set output value Vs calculated based on the calibration information Ic and the correction information Ir is stored in the memory unit 51. The order in which the calibration information Ic and the correction information Ir are acquired is not limited to this. The calibration information Ic and the correction information Ir may be acquired prior to acquiring the set water volume Ws, and may be incorporated in advance into the calculation formula used to calculate the set output value Vs.

[0055] In step S5, the control unit 50 disables a specific water discharge start operating unit. Specifically, in the case of metered discharge of raw water, the control unit 50 disables the first sensor 31 and the third sensor 33. As described above, the first sensor 31 is a sensor disposed adjacent to the water outlet 12A and has a detection area A1 that includes part of the water discharge area A of the water outlet 12A, and the third sensor 33 is a sensor that opens and closes the second on-off valve 22 to discharge purified water. By disabling the first sensor 31, the control unit 50 avoids unintentional water discharge when a container such as a cup is placed in the water discharge area A below the water outlet 12A. By disabling the third sensor 33, the control unit 50 avoids discharging purified water, which is a type of water other than the type of water discharged in the metered water discharge control.

[0056] In step S6, the control unit 50 determines whether or not it has acquired information regarding the start of water discharge, which is output by operating the water discharge start operating unit. That is, the control unit 50 waits for information regarding the start of water discharge by operating the water discharge start operating unit to be input. In the case of this embodiment, the control unit 50 waits for a detection signal to be input from the second sensor 32 as information regarding the start of water discharge. Before operating the second sensor 32, the user of the water discharge device 1 places a container such as a cup below the water outlet 12A. At this time, because the first sensor 31 was disabled in step S5, unexpected water discharge caused by the first sensor 31 detecting a container or the like is avoided.

[0057] When the control unit 50 acquires the water discharge start instruction information in step S6, it opens the first on-off valve 21 in step S7. As a result, raw water that has passed through the mixing valve 14 flows through the outflow flow path 73 and is discharged from the water discharge port 12A, and metering begins. In the case of metered discharge of purified water, the second on-off valve 22 is opened, and purified water that has passed through the water purification cartridge 60 is discharged.

[0058] In the water discharge device 1 during metered water discharge, the control unit 50 acquires water information Iw in step S8. Specifically, the control unit 50 acquires, as the water information Iw, the output value measured by the water volume measurement unit 41 and the water temperature measured by the water temperature measurement unit 42 via the water information acquisition unit 54. The acquired water information Iw is stored in the memory unit 51.

[0059] In step S9, the control unit 50 updates the set output value Vs. The set output value Vs is updated based on the water temperature measured by the water temperature measurement unit 42, which is included in the water information Iw acquired in step S8. That is, the control unit 50 updates the set output value Vs calculated in step S4 in accordance with the temperature of the water flowing through the outflow passage 73. This changes the drive control of the first on-off valve 21 in the ongoing metered water discharge control. Specifically, the set output value Vs initially set in step S4 is changed in accordance with the water temperature, and the closing timing of the first on-off valve 21 is changed.

[0060] In step S10, the control unit 50 compares the actual measured output value Vr with the set output value Vs. Specifically, the control unit 50 compares the actual measured output value Vr, which is the output value measured by the water volume measurement unit 41 and is included in the water information Iw acquired in step S8, with the set output value Vs calculated in step S4 and updated in step S9. If the actual measured output value Vr is less than the set output value Vs, the control unit 50 returns to step S8 to acquire the water information Iw again and updates the set output value Vs in step S9. The control unit 50 repeatedly executes steps S8 to S10 until the actual measured output value Vr becomes equal to the set output value Vs. If the actual measured output value Vr is equal to or greater than the set output value Vs, the control unit 50 proceeds to step S11.

[0061] In step S11, the control unit 50 closes the first on-off valve 21. In step S12, the control unit 50 cancels the disabling of the first sensor 31 and the third sensor 33. Finally, in step S13, the control unit 50 updates the correction information Ir. The correction information Ir is updated based on the output value (number of pulse signals) measured by the water volume measurement unit 41, which is acquired after the first on-off valve 21 is closed in step S11. This correction information Ir is stored in the memory unit 51 and acquired in the next and subsequent metered water discharge control (step S3), and is used to calculate the set output value Vs (step S4).

[0062] As described above, the water discharge device 1 according to this embodiment includes the water discharge unit 10, the water volume measuring unit 41, the first on-off valve 21 and the second on-off valve 22 as electrically operated on-off valves, and the control unit 50. The water discharge unit 10 defines the following flow paths: a water supply flow path 71, a hot water supply flow path 72, an outflow flow path 73, and a purified water flow path 81. The water volume measuring unit 41 measures an output value corresponding to the amount of water flowing through the outflow flow path 73 as a flow path. The first on-off valve 21 opens and closes the outflow flow path 73. The second on-off valve 22 opens and closes the purified water flow path 81. The control unit 50 controls the operation of the first on-off valve 21 and the second on-off valve 22. The control unit 50 acquires information regarding the set water volume Ws set by operating the smart speaker 3 as a water discharge volume setting operation unit, and performs metered water discharge control to drive one of the first on-off valve 21 and the second on-off valve 22 based on the actual measured output value Vr as the output value measured by the water volume measurement unit 41 so as to discharge water at this set water volume Ws from the water discharge port 12A of the water discharge unit 10. The control unit 50 has a calibration information acquisition unit 53. The calibration information acquisition unit 53 acquires calibration information Ic of the water volume measurement unit 41. The control unit 50 performs metered water discharge control based on the output value measured by the water volume measurement unit 41 calibrated using the calibration information Ic.

[0063] In this way, the water discharger 1 calibrates the water volume measuring unit 41 using the calibration information Ic. This reduces the variation in the output value measured by the water volume measuring unit 41 caused by the measurement environment. Therefore, the water discharger 1 can improve the accuracy of metered water discharge.

[0064] The water volume measuring unit 41 is configured with a water wheel type flow sensor. This allows for a water volume measuring unit 41 with a simple configuration. The water discharger 1 can mitigate variations in output values ​​due to product errors of the flow sensor in the water volume measuring unit 41 and water temperature, which may affect the rotation of the water wheel, using the calibration information Ic. Thus, there is great significance in calibrating the water volume measuring unit 41 in the water discharger 1.

[0065] The water discharge device 1 includes a water discharge unit 10, a first on-off valve 21 and a second on-off valve 22 as electrically operated on-off valves, and a control unit 50. The water discharge unit 10 forms flow paths including a water supply flow path 71, a hot water supply flow path 72, an outflow flow path 73, and a purified water flow path 81. The first on-off valve 21 opens and closes the outflow flow path 73. The second on-off valve 22 opens and closes the purified water flow path 81. The control unit 50 controls the operation of the first on-off valve 21 and the second on-off valve 22. The control unit 50 acquires information regarding a set water volume Ws that is set by operating a smart speaker 3 that serves as a water discharge volume setting operation unit that sets the amount of water discharged from the water discharge unit 10. The control unit 50 executes metered water discharge control, which drives one of the first on-off valve 21 and the second on-off valve 22 so that the set water volume Ws is discharged from the water discharge unit 10. In the metered water discharge control, the control unit 50 acquires information regarding the water discharge start instruction output by operating one of the second sensor 32 and the third sensor 33, which serve as water discharge start operating units that instruct the start of water discharge from the water discharge unit 10, and opens one of the first opening / closing valve 21 and the second opening / closing valve 22 to start metered water discharge.

[0066] After setting the set water volume Ws for metered water dispensing, the water dispensing device 1 enters a standby state and then starts dispensing water after receiving a water dispensing start command. This prevents the water dispensing device 1 from starting to dispense water before a container for receiving the measured water, such as a cup or pot, is placed. Metered water dispensing in the water dispensing device 1 can be performed not only by placing a container for receiving the measured water, such as a cup or pot, before setting the set water volume Ws, but also by setting the set water volume Ws and then placing the container. In this way, compared to conventional methods of setting a set water volume, the water dispensing device 1 improves the flexibility of the work procedure for metered water dispensing. For example, if water is dispensed immediately after setting the set water volume, it is necessary to place a container before setting the set water volume in order to ensure the full amount of water set, and accurate metering is not possible. In contrast, the water dispensing device 1 can start dispensing water for metered water dispensing at a user's desired timing, allowing the user to place a container at the user's desired timing, making it easy to ensure the set water volume Ws for metered water dispensing. Therefore, the water discharger 1 can easily achieve accurate metered water discharge.

[0067] The water discharge device 1 has a first sensor 31, a second sensor 32, a third sensor 33, etc. as multiple water discharge start operating units. In metered water discharge control, the control unit 50 maintains the closed state of the electric on-off valves even if a specific water discharge start operating unit among the multiple water discharge start operating units is operated. Specifically, in metered water discharge of raw water, the control unit 50 maintains the closed state of the first on-off valve 21 and the second on-off valve 22 even if either the first sensor 31 or the third sensor 33 is operated. In metered water discharge of purified water, the control unit 50 maintains the closed state of the first on-off valve 21 even if either the first sensor 31 or the second sensor 32 is operated. Therefore, after setting the set water volume Ws for metered water discharge, the water discharge device 1 will not start water discharge even if a specific operating unit is operated by mistake, so it is possible to prevent water discharge from being started due to an erroneous operation. In this way, the water discharge device 1 can start discharging water by only accepting operation of an operation unit other than a specific water discharge start operation unit, thereby avoiding problems such as the unexpected start of metered water discharge or the cancellation of metered water discharge and the start of other water discharge, thereby further improving usability.

[0068] In the water discharge device 1, the specific water discharge start operating unit among the multiple water discharge start operating units is the first sensor 31. This first sensor 31 has a detection area A1 that includes at least a part of the water discharge area A from the water discharge outlet 12A in the water discharger 10. For this reason, it is very significant to prevent water discharge due to the accidental operation of the specific water discharge start operating unit. In other words, it is possible to avoid the accidental start of water discharge due to detection by the first sensor 31, for example, when placing a container after setting the set water volume Ws.

[0069] The water discharge device 1 includes a water discharge unit 10, a water volume measuring unit 41, a water temperature measuring unit 42, a first on-off valve 21 and a second on-off valve 22 as electrically operated on-off valves, and a control unit 50. The water discharge unit 10 forms a water supply flow path 71, a hot water supply flow path 72, an outflow flow path 73, and a purified water flow path 81 as flow paths. The water volume measuring unit 41 measures an output value corresponding to the amount of water flowing through the outflow flow path 73 as a flow path. The water temperature measuring unit 42 measures the temperature of water flowing through the outflow flow path 73 as a flow path. The first on-off valve 21 opens and closes the outflow flow path 73. The second on-off valve 22 opens and closes the purified water flow path 81. The control unit 50 controls the operation of the first on-off valve 21 and the second on-off valve 22. The control unit 50 acquires information regarding the set water volume Ws that is set by operating the smart speaker 3 as a water discharge volume setting operation unit, and performs metered water discharge control to drive one of the first opening / closing valve 21 and the second opening / closing valve 22 based on the actual measured output value Vr as an output value measured by the water volume measuring unit 41 and the water temperature measured by the water temperature measuring unit 42 so as to discharge this set water volume Ws from the water discharge outlet 12A in the water discharge unit 10.

[0070] That is, the control unit 50 executes feedback control to correct the set output value Vs corresponding to the set water volume Ws according to the water temperature measured by the water temperature measuring unit 42. In this way, the water discharger 1 updates the set output value Vs as needed according to environmental changes during metered water discharge. As a result, the water discharger 1 can improve the accuracy of metered water discharge.

[0071] The water discharge device 1 includes a water discharge unit 10, a water volume measuring unit 41, a water information acquiring unit 54, a first on-off valve 21 and a second on-off valve 22 as electrically operated on-off valves, and a control unit 50. The water discharge unit 10 forms a water supply flow path 71, a hot water supply flow path 72, an outflow flow path 73, and a purified water flow path 81 as flow paths. The water volume measuring unit 41 measures an output value corresponding to the amount of water flowing through the outflow flow path 73 as a flow path. The water information acquiring unit 54 acquires water information Iw as information about the water flowing through the flow paths. The first on-off valve 21 opens and closes the outflow flow path 73. The second on-off valve 22 opens and closes the purified water flow path 81. The control unit 50 controls the operation of the first on-off valve 21 and the second on-off valve 22. The control unit 50 acquires information regarding the set water volume Ws set by operating the smart speaker 3 as a water discharge volume setting operation unit, and performs metered water discharge control to drive one of the first opening / closing valve 21 and the second opening / closing valve 22 based on the actual measured output value Vr as an output value measured by the water volume measuring unit 41 and the water information Iw acquired by the water information acquisition unit 54 so as to discharge this set water volume Ws from the water discharge outlet 12A in the water discharge unit 10.

[0072] That is, the control unit 50 acquires correction information Ir generated based on the water information Iw acquired by the water information acquisition unit 54. The correction information Ir is information about the amount of water discharged after the valve close signal is sent, i.e., information about the water stop delay. The control unit 50 corrects the set output value Vs corresponding to the set water amount Ws according to this correction information Ir. As a result, the water discharge device 1 can mitigate metering errors caused by the water stop delay, and improve the accuracy of metered water discharge.

[0073] The control unit 50 controls the drive of the first on-off valve 21 and the second on-off valve 22 in the subsequent metered water discharge control based on the number of pulse signals as water information Iw acquired after closing either the first on-off valve 21 or the second on-off valve 22. Therefore, the water discharge device 1 can easily mitigate measurement errors caused by delays in stopping water, and can improve accuracy.

[0074] In the metered water discharge control, the control unit 50 controls the drive of the first on-off valve 21 and the second on-off valve 22 based on information about water temperature as water information Iw acquired while either the first on-off valve 21 or the second on-off valve 22 is open. That is, the control unit 50 performs feedback control to correct the set output value Vs corresponding to the set water volume Ws according to the water temperature measured by the water temperature measuring unit 42. Therefore, the water discharge device 1 can improve the accuracy of metered water discharge.

[0075] The water discharger 1 has a first on-off valve 21 that opens and closes the outflow flow path 73 as a flow path, and a second on-off valve 22 that opens and closes the purified water flow path 81 as a flow path. The control unit 50 acquires information about the type of water to be discharged from the water discharger 10, and executes control to drive one of the first on-off valve 21 and the second on-off valve 22 depending on the type of water. In this way, the water discharger 1 can perform metered discharge of multiple types of water.

[0076] <Other embodiments> The present disclosure is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope of the present disclosure.

[0077] The water discharge device is not limited to use in a kitchen sink, but can be used in any water-related area such as a washbasin in a bathroom.

[0078] The water discharge device may discharge only either raw water or purified water.

[0079] The configuration, shape, size, etc. of the water discharger according to the present disclosure are not limited to the above-described embodiment, and there are no particular restrictions on the shape, arrangement, etc. of each component of the water discharger.

[0080] The electrically operated on-off valve according to the present disclosure is not limited to the solenoid valve exemplified in the above embodiment, and may be any of various valves that are electrically operated under the control of a controller, such as an electrically operated cylinder valve or an electrically operated ball valve.

[0081] The configuration of the control unit according to the present disclosure is not limited to the above embodiment.

[0082] The water discharge volume setting operation unit according to the present disclosure is not limited to the smart speaker exemplified in the above embodiment. For example, a smartphone, tablet device, personal computer, etc. may be used as the water discharge volume setting operation unit. In this case, the water discharge volume setting operation may be performed by voice operation, or by operation of a touch panel or keyboard. The water discharge volume setting operation unit is not limited to an external device, and may be, for example, an input means dedicated to the water discharge device according to the present disclosure, or the like, that is provided with the function of a water discharge volume setting operation unit in the water discharge device.

[0083] The calibration information may be automatically selected and adopted by the control unit from various calibration information stored in a memory unit or an external server, depending on weather data obtained from a wide area communication network, the season, etc.

[0084] The water volume measuring unit according to the present disclosure may have any configuration as long as it measures an output value corresponding to the volume of water flowing through the flow path. When the water volume measuring unit is configured with a flow sensor, the type of the flow sensor is not limited to a water wheel type, but may be any type such as an ultrasonic type, an electromagnetic type, or a Karman vortex type.

[0085] In the water discharge device according to the present disclosure, it is not essential that the control unit opens the electric on-off valve and starts metered water discharge by acquiring information related to the water discharge start command output by operating the water discharge start operating unit. In the metered water discharge control, the control unit may, for example, automatically start metered water discharge after a predetermined time has elapsed after the set water volume has been set.

[0086] The water discharge start operation unit is not limited to the sensors exemplified in the above embodiment. For example, a smart speaker, smartphone, tablet terminal, personal computer, or the like equipped with this function may be used as the water discharge start operation unit. In this case, the water discharge start operation may be performed by voice operation, or by operating a touch panel or keyboard.

[0087] In the water discharge device according to the present disclosure, neither the configuration related to obtaining correction information nor the configuration related to updating the set output value is an essential configuration.

[0088] When a water temperature measuring unit is provided, its arrangement is not limited to the arrangement exemplified in the above embodiment. The water temperature measuring unit may be arranged, for example, between the water volume measuring unit and the first on-off valve in the outflow flow path, or between the first on-off valve and the mixing valve. The water temperature measuring unit may be arranged, for example, in the water supply flow path and the hot water supply flow path. The water temperature measuring unit may be arranged, for example, downstream of the check valve in the water supply flow path, between the check valve and the stop valve, etc. The water temperature measuring unit may be arranged, for example, in the purified water flow path. The water temperature measuring unit may be arranged, for example, between the water purification cartridge and the check valve in the purified water flow path. The water temperature measuring unit may be arranged, for example, in two or more of the arrangements in the embodiment and the arrangements described above. [Explanation of symbols]

[0089] 1...water discharge device, 3...smart speaker (water discharge volume setting operation section), 10...water discharge section, 21...first on-off valve (electric on-off valve), 22...second on-off valve (electric on-off valve), 41...water volume measurement section, 53...calibration information acquisition section, 71...water supply flow path (flow path), 72...hot water supply flow path (flow path), 73...outflow flow path (flow path), Ws...set water volume

Claims

1. a water discharge portion in which a flow path is formed; a water volume measuring unit that measures an output value according to the volume of water flowing through the flow path; an electric on-off valve that opens and closes the flow path; a control unit that controls the driving of the electric on-off valve; It is equipped with the control unit acquires information about a set water volume set by operating a water discharge volume setting operation unit that sets the amount of water to be discharged from the water discharge unit, and executes metered water discharge control that drives the electric on-off valve based on the output value measured by the water volume measurement unit so that the set water volume is discharged from the water discharge unit; The control unit has a calibration information acquisition unit that acquires calibration information of the water volume measurement unit, and executes the metered water discharge control based on the output value measured by the water volume measurement unit calibrated by the calibration information, In the metered water discharge control, the control unit calculates in advance a set output value that converts the set water volume into the output value of the water volume measuring unit based on the calibration information, and performs control to determine whether the set water volume has been discharged by comparing the set output value with the output value actually measured by the water volume measuring unit.

2. The water discharge device according to claim 1 , wherein the water volume measuring unit has a water wheel type flow sensor.

3. The water discharge device according to claim 1 or 2, wherein the calibration information is updated as needed.

4. A water discharge device described in any one of claims 1 to 3, wherein the calibration information is generated based on the value of a predetermined set water volume in the metered water discharge control previously executed by the control unit and the value of the actual water volume obtained in the metered water discharge control measured by another measuring means different from the water volume measuring unit.

5. A water-discharging device as described in Claim 4, wherein the calibration information is generated based on the value of the specified set water volume in the metered water-discharging control executed when the water-discharging device is installed at the installation location.

6. A water discharge device described in any one of claims 1 to 5, wherein in the metered water discharge control, the water discharge section discharges purified water.

7. A sink, The water discharge device according to any one of claims 1 to 6, which is installed on the sink; A fully equipped kitchen.

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