JP2018059280A - Automatic cock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic cock capable of appropriately controlling discharge and stop of water by detection with a radio wave sensor, even in a case of the changeover of a plurality of water discharge forms.SOLUTION: An automatic cock comprises: a water discharge part having a first water discharge form and a second water discharge form different from the first water discharge form; a changeover part changing over from the first water discharge form to the second water discharge form of the water discharge part; a radio wave sensor outputting detection signals by detecting a detection object; a control part controlling the discharge and stop of water from the water discharge part on the basis of the detection signals from the radio wave sensor. The detection signals when discharging water from the water discharge part in the second water discharge form are larger than the detection signals when discharging water from the water discharge part in the first water discharge form, and the control part changes over the control of water stopping of the water discharge part for the first water discharge form and the second water discharge form.SELECTED DRAWING: Figure 3

Description

  Aspects of the invention generally relate to automatic faucets.

  For example, in an automatic faucet equipped with a radio wave sensor such as a microwave sensor, at least a part of the radio wave is applied to the water discharge flow, a threshold value for water stoppage is determined based on a detection signal obtained only during the water discharge flow, and the threshold value is set. It has been known that water stoppage is performed when a state where the detection signal falls is continued for a predetermined time (for example, Patent Document 1).

  On the other hand, a faucet is also known in which a plurality of water discharge modes such as single water discharge (rectified water discharge) and shower water discharge can be switched in a bathroom vanity or a system kitchen.

  Even in an automatic faucet equipped with a radio wave sensor, there is a desire to be able to switch between a plurality of water discharge modes. However, when the threshold value is determined according to the water discharge flow as described above, the tendency of the detection signal may change when the water discharge mode is switched, and the water discharge may not be appropriately controlled.

  For this reason, in an automatic faucet provided with a radio wave sensor, it is desired that the water stoppage can be appropriately controlled even when a plurality of water discharge modes are switched.

JP 2009-150190 A

  The present invention has been made on the basis of recognition of such problems, and an object thereof is to provide an automatic faucet that can appropriately control water discharge by detection by a radio wave sensor even when a plurality of water discharge forms are switched. And

  1st invention is the switching which switches the water discharge part which has a 1st water discharge form and the 2nd water discharge form different from the said 1st water discharge form, and the said 1st water discharge form and the said 2nd water discharge form of the said water discharge part And a radio wave sensor that detects a detected object and outputs a detection signal, and a control unit that controls water discharge from the water discharge unit based on the detection signal from the radio wave sensor, The detection signal when water is discharged from the water discharge section in the second water discharge form is larger than the detection signal when water is discharged from the water discharge section in the first water discharge form, and the control unit is configured with the first water discharge form. It is an automatic faucet characterized by switching control of water stoppage of the water discharge part with the 2nd water discharge form.

  According to this automatic faucet, the control of water stoppage can be switched between the first water discharge form and the second water discharge form. Therefore, even when the first water discharge form and the second water discharge form are switched, the radio wave sensor is used. The water stop can be appropriately controlled by the detection. Therefore, erroneous water discharge from the automatic faucet can be suppressed.

  According to a second invention, in the first invention, the control unit controls the water discharge based on the amplitude value of the detection signal. When the first water discharge mode is set, the control unit controls the amplitude value of the detection signal. The first threshold value is set, and in the second water discharge mode, the second threshold value is set for the amplitude value of the detection signal, and the second threshold value is higher than the first threshold value. It is an automatic faucet.

  According to this automatic faucet, when the first water discharge mode is set, the first threshold value is set, and when the second water discharge mode is set, the second threshold value is set, thereby switching between the first water discharge mode and the second water discharge mode. In addition, water stoppage can be controlled more reliably.

  According to a third invention, in the first or second invention, in the second water discharge mode, the time from when the detected object comes out of the detection area of the radio wave sensor until the water discharge unit is stopped is In the first water discharge mode, the automatic faucet is characterized in that it is longer than the time from when the detected object comes out of the detection area of the radio wave sensor until the water discharge part is stopped.

  According to this automatic faucet, the water stoppage in the second water discharge form can be more accurately controlled by lengthening the time until the water is stopped in the second water discharge form.

  According to a fourth invention, in any one of the first to third inventions, the control unit determines whether the water discharged from the water discharger is in the first water discharge form or the second water discharge form. It is an automatic water faucet characterized by making a determination based on the detection signal and switching the water stop control of the water discharge section.

  According to this automatic faucet, it is possible to reliably switch the water stop control of the first water discharge form and the second water discharge form. Moreover, the increase in the number of parts can be suppressed by using a detection signal for determination.

  5th invention is further equipped with the detection part which detects the switch with the said 1st water discharge form by the said switch part in any one of 1st-3rd invention, and the said 2nd water discharge form, The said control part Is an automatic water faucet characterized by switching the water stop control of the water discharger based on the detection result of the detector.

  According to this automatic faucet, it is possible to reliably switch the water stop control of the first water discharge form and the second water discharge form.

  According to the aspect of the present invention, there is provided an automatic faucet that can appropriately control water discharge by detection by a radio wave sensor even when a plurality of water discharge forms are switched.

It is a block diagram showing the automatic faucet concerning a 1st embodiment. Fig.2 (a)-FIG.2 (d) are graphs showing an example of a detection signal. It is a flowchart showing operation | movement of the automatic water tap which concerns on 1st Embodiment. It is a block diagram showing the automatic faucet concerning a 2nd embodiment.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
(First embodiment)
FIG. 1 is a block diagram showing an automatic faucet according to the first embodiment.
As shown in FIG. 1, the automatic faucet 10 includes a water discharge unit 12, a switching unit 14, a solenoid valve 16, a radio wave sensor 18, and a control unit 20. The automatic faucet 10 is used, for example, in a bathroom vanity or a system kitchen.

  The water discharger 12 discharges water to a wash bowl or a kitchen sink. The water discharger 12 is a so-called spout. The water discharger 12 includes a first water discharge port 31 and a plurality of second water discharge ports 32. The water discharger 12 has a first water discharge form for discharging water from the first water discharge opening 31 and a second water discharge form for discharging water from each of the plurality of second water discharge openings 32.

  The first water discharge form is, for example, rectified water discharge that discharges water in a single water flow, or foam water discharge that includes a plurality of bubbles in a single water flow. The second water discharge form is, for example, a shower water discharge that discharges water from each of the plurality of second water discharge ports 32 in the form of a water flow or a water drop, or a foam shower water discharge that includes bubbles in the water flow or water droplets of the shower-like water discharge. is there.

  The second water discharge form is, for example, a water discharge form that discharges water in a wider range than the first water discharge form. Thus, the water discharger 12 has a first water discharge form and a second water discharge form different from the first water discharge form.

  The plurality of second water discharge ports 32 may be arranged in a two-dimensional matrix or in a line. That is, the shower water discharge may be a water discharge form that discharges a bundle of a plurality of water streams, or a water discharge form that discharges water in a wide width by arranging a plurality of water streams in a line shape.

  The switching unit 14 switches between the first water discharge form and the second water discharge form of the water discharge unit 12. For example, the switching unit 14 switches between a path for supplying water to the first water outlet 31 and a path for supplying water to each second water outlet 32 to switch between the first water discharge form and the second water discharge form. Switch. The switching unit 14 may be provided separately from the water discharge unit 12 or may be provided in the water discharge unit 12.

  The electromagnetic valve 16 is connected to the switching unit 14 and to a water supply source such as a water supply pipe. By opening the electromagnetic valve 16, water is discharged from the water discharger 12, and by closing the electromagnetic valve 16, water discharge from the water discharger 12 is stopped.

  The radio wave sensor 18 detects a detected object and outputs a detection signal. For example, the radio wave sensor 18 detects the user's hand or the like that has been put out in front of the water discharger 12 as a body to be detected. The radio wave sensor 18 is, for example, a microwave sensor. The radio wave sensor 18 transmits a microwave, receives a reflected wave reflected by an object to be detected such as a user's hand, and measures a phase difference or a frequency difference between the transmitted wave and the received wave, whereby the object is radio wave. Whether the sensor 18 is moving in the approaching direction or the direction away from the sensor 18 or the moving speed of the object is detected. The detection signal output from the radio wave sensor 18 is, for example, a Doppler signal.

  The frequency of the microwave transmitted by the radio wave sensor 18 is preferably a GHz (gigahertz) band, and is, for example, 10.50 GHz or more and 10.55 GHz or less.

  The radio wave sensor 18 is arranged so that at least a part of the radiated radio wave hits a water discharge flow discharged from the first water discharge port 31 and a water discharge flow discharged from at least a part of each second water discharge port 32. Is done. That is, the radio wave sensor 18 emits radio waves toward the water discharge flow from the first water discharge port 31 or the water discharge flow from the second water discharge port 32, and receives the radio waves reflected by the water discharge flow.

  The control unit 20 is electrically connected to the electromagnetic valve 16 and the radio wave sensor 18. The control unit 20 controls the water discharge from the water discharge unit 12 by controlling the opening and closing of the electromagnetic valve 16 based on the detection signal from the radio wave sensor 18.

Fig.2 (a)-FIG.2 (d) are graphs showing an example of a detection signal.
Fig.2 (a) represents an example of the detection signal DS when there is no to-be-detected body in the detection area | region of the electromagnetic wave sensor 18 in a 1st water discharge form. That is, FIG. 2A shows an example of the detection signal DS when water is discharged from the first water outlet 31 in a state where the user does not hold out a hand or the like.

  FIG. 2B shows an example of the detection signal DS when the detected object is in the detection area of the radio wave sensor 18 in the first water discharge form. That is, FIG. 2B shows an example of the detection signal DS when the user is performing hand washing with water discharged from the first water outlet 31.

  FIG. 2C and FIG. 2D show an example of the detection signal DS when water is discharged from each second water discharge port 32 in a state where the user does not hold out a hand or the like. 2A to 2D, the horizontal axis is time, and the vertical axis is voltage.

  As shown in FIGS. 2A to 2D, the detection signal DS is a signal that vibrates in a wave shape. The detection signal DS is, for example, a difference signal between the transmission wave and the reception wave of the radio wave sensor 18. When the user performs hand washing or the like, the reflected wave is disturbed due to the disturbance of the water discharge flow or the movement of the user's hand, and the difference between the transmission wave and the reception wave becomes large. That is, as shown in FIG. 2A and FIG. 2B, the amplitude of the detection signal DS is greater when hand washing is performed than when it is not performed.

  The controller 20 sets the first threshold th1 for the amplitude value of the detection signal DS when in the first water discharge mode. For example, the control unit 20 sets the first threshold th1 on the positive side and the negative side with respect to the center of the amplitude of the detection signal DS output by the radio wave sensor 18. In other words, the control unit 20 sets the first upper limit value and the first lower limit value for the amplitude value of the detection signal DS.

  The first threshold th1 is set to a magnitude such that the detection signal DS is less than the first threshold th1 when water discharge in the first water discharge form is performed from the water discharger 12 in a state where there is no object to be detected. The first threshold th1 is set to a magnitude such that the detection signal DS is equal to or greater than the first threshold th1 when there is an object to be detected.

  When the detection signal DS changes from a state below the first threshold th1 to a state above the first threshold th1, the control unit 20 opens the electromagnetic valve 16 to discharge water from the water discharge unit 12. Then, the control unit 20 closes the electromagnetic valve 16 and stops water discharge from the water discharge unit 12 when the detection signal DS changes from a state equal to or higher than the first threshold th1 to a state lower than the first threshold th1. Thereby, the water discharge from the water discharge part 12 is automatically switched in response to the operation | movement etc. which put out a user's hand.

  In the second water discharge form such as shower water discharge, the reflected wave is easily disturbed compared to the first water discharge form such as rectified water discharge. Therefore, the detection signal DS when the water is discharged from the water discharge unit 12 in the second water discharge form is larger than the detection signal DS when the water is discharged from the water discharge part 12 in the first water discharge form.

  The second water discharge form is not limited to shower water discharge or foam shower water discharge, but may be any water discharge form in which the detection signal DS becomes larger than the first water discharge form as described above due to disturbance of the water discharge flow or the like. Moreover, the 1st water discharge form may be arbitrary water discharge forms, without restricting to rectified water discharge or foam water discharge. The first form of water discharge is not necessarily limited to the form of water discharged from one water outlet, but may be the form of water discharged from a plurality of water outlets. The second water discharge form is not limited to the water discharge form for discharging water from a plurality of water outlets, and may be a water discharge form for discharging water from one water outlet.

  For this reason, as shown in FIG. 2C, the first threshold th1 is set for the detection signal DS when water discharge in the second water discharge form is performed from the water discharger 12 in a state where there is no object to be detected. Then, the detection signal DS may exceed the first threshold th1 even though there is no object to be detected. That is, even after the user leaves the automatic faucet 10, there is a possibility that the water will remain from the water discharger 12.

  For this reason, the control part 20 sets 2nd threshold value th2 with respect to the amplitude value of the detection signal DS at the time of the 2nd water discharge form. For example, the control unit 20 sets a second upper limit value and a second lower limit value for the amplitude value of the detection signal DS. The second threshold th2 is higher than the first threshold th1. When the threshold values are set on the positive side and the negative side with respect to the center of the amplitude of the sinusoidal transmission wave, the absolute value of the second threshold th2 is higher than the absolute value of the first threshold th1.

  The second threshold th2 is set to a magnitude such that the detection signal DS is less than the second threshold th2 when water discharge in the second water discharge form is performed from the water discharger 12 in a state where there is no object to be detected. The second threshold th2 is set to a magnitude such that the detection signal DS is equal to or greater than the second threshold th2 when the detection target is present.

  For example, after starting water discharge based on the first threshold th1, the control unit 20 determines whether the water discharged from the water discharge unit 12 is in the first water discharge form or the second water discharge form based on the detection signal DS. Then, the water stop control of the water discharger 12 is switched.

  For example, when hand washing or the like is performed in the second water discharge form, the detection signal DS is larger than when hand washing or the like is performed in the first water discharge form. For this reason, the control unit 20 determines whether or not the detection signal DS is equal to or greater than a predetermined value after the first threshold th1 is reached, for example, and then starts the water discharge. When it is determined as a form and is equal to or greater than a predetermined value, it is determined as a second water discharge form.

  When it is determined that the first water discharge mode is set, the control unit 20 sets the first threshold th1 as described above, and closes the electromagnetic valve 16 when the detection signal DS is less than the first threshold th1. Thus, water discharge from the water discharger 12 is stopped. And the control part 20 sets 2nd threshold value th2 when it determines with a 2nd water discharge form, and when the detection signal DS becomes less than 2nd threshold value th2, it closes the solenoid valve 16 and discharges water. Water discharge from the unit 12 is stopped.

  The threshold for determining the start of water discharge may be the first threshold th1 or the second threshold th2. For example, the first threshold th1 or the second threshold th2 used at the previous water stop may be used for the next water discharge start determination, or only the first threshold th1 may be used for the water stop start determination. Good. Moreover, you may use 3rd threshold value th3 different from 1st threshold value th1 and 2nd threshold value th2 exclusively for the determination of water discharge start.

FIG. 3 is a flowchart showing the operation of the automatic faucet according to the first embodiment.
As illustrated in FIG. 3, the control unit 20 of the automatic faucet 10 determines whether or not the amplitude of the detection signal DS is greater than or equal to the first threshold th1 when the water discharge determination control is started (step S1, FIG. 3). S2). When using the automatic faucet 10, the user puts his hand etc. in front of the water discharger 12. At this time, the user switches between the first water discharge form and the second water discharge form by operating the switching unit 14 as necessary.

  When determining that the amplitude of the detection signal DS is equal to or greater than the first threshold th1, the control unit 20 switches the electromagnetic valve 16 from the closed state to the open state, and starts water discharge from the water discharge unit 12 (step S3 in FIG. 3). . At this time, when the first water discharge form is selected by the switching unit 14, water is discharged from the first water discharge port 31, water discharge in the first water discharge form is executed, and the second water discharge form is selected. If there is, water is discharged from each second water discharge port 32 and water discharge in the second water discharge form is executed.

  When starting the water discharge, the control unit 20 starts the water stoppage determination control (step S4 in FIG. 3). When starting the water stoppage determination control, the control unit 20 determines whether the water discharged from the water discharger 12 is in the first water discharge form or the second water discharge form based on the detection signal DS (step S5 in FIG. 3). ).

  If it determines with it being the 1st water discharge form, the control part 20 will set 1st threshold value th1 with respect to the amplitude value of detection signal DS (step S6 of FIG. 3). And the control part 20 determines whether the amplitude value of the detection signal DS became less than 1st threshold value th1 (step S7 of FIG. 3).

  When it is determined that the amplitude value of the detection signal DS is equal to or greater than the first threshold th1, the control unit 20 determines that there is a detection target and continues water discharge from the water discharge unit 12.

  On the other hand, if the control unit 20 determines that the amplitude value of the detection signal DS is less than the first threshold th1, has the state where the amplitude value of the detection signal DS is less than the first threshold th1 continued for the first time? It is determined whether or not (step S8 in FIG. 3).

  If the amplitude value of the detection signal DS becomes equal to or greater than the first threshold th1 before the first time has elapsed, the control unit 20 continues water discharge from the water discharge unit 12 without stopping water. Then, when the first time has elapsed, the control unit 20 determines that there is no object to be detected, switches the electromagnetic valve 16 from the open state to the closed state, and stops water discharge from the water discharge unit 12 (FIG. 3). Step S9).

  When it determines with it being a 2nd water discharge form in step S5, the control part 20 sets 2nd threshold value th2 with respect to the amplitude value of the detection signal DS (step S10 of FIG. 3). And the control part 20 determines whether the amplitude value of the detection signal DS became less than 2nd threshold value th2 (step S11 of FIG. 3).

  When it is determined that the amplitude value of the detection signal DS is equal to or greater than the second threshold th2, the control unit 20 determines that there is an object to be detected, and continues water discharge from the water discharge unit 12.

  On the other hand, if the control unit 20 determines that the amplitude value of the detection signal DS is less than the second threshold th2, has the state where the amplitude value of the detection signal DS is less than the second threshold th2 continued for the second time? It is determined whether or not (step S12 in FIG. 3).

  When the amplitude value of the detection signal DS becomes equal to or larger than the second threshold th2 again before the second time elapses, the control unit 20 continues water discharge from the water discharge unit 12 without stopping water. When the second time has elapsed, the control unit 20 determines that there is no object to be detected, switches the electromagnetic valve 16 from the open state to the closed state, and stops water discharge from the water discharge unit 12 (FIG. 3). Step S9).

  The second time is longer than the first time. That is, the control unit 20 sets the water stoppage determination time longer in the second water discharge form than in the first water discharge form.

  In the second water discharge mode, the fluctuation of the amplitude value of the detection signal DS is larger than that in the first water discharge mode, and the amplitude value of the detection signal DS temporarily becomes less than the second threshold value even in the state where the detection target exists. There is a possibility. The controller 20 sets the water stoppage determination time longer in the second water discharge form than in the first water discharge form. Thereby, it can suppress that the water discharge from the water discharge part 12 stops unintentionally.

  Thus, the control unit 20 makes the second time longer than the first time. Therefore, in the automatic faucet 10, the time from when the detected object comes out of the detection area of the radio wave sensor 18 in the second water discharge form to the time when the water discharge unit 12 is stopped is the time for the detected object in the first water discharge form. It takes longer than the time from exiting the detection area of the radio wave sensor 18 until the water discharger 12 is stopped.

  When the water discharge from the water discharge unit 12 is stopped, the control unit 20 returns to the operation of step S1 and repeats the same processing.

  As described above, in the automatic faucet 10 according to the present embodiment, control of water stoppage can be switched between the first water discharge form and the second water discharge form, and therefore, the first water discharge form and the second water discharge form Even in the case of switching, water stoppage can be appropriately controlled by detection by the radio wave sensor 18. Therefore, erroneous water discharge from the automatic faucet 10 can be suppressed.

  The automatic faucet 10 switches between the first water discharge mode and the second water discharge mode by setting the first threshold th1 in the first water discharge mode and setting the second threshold th2 in the second water discharge mode. In this case, the water stop can be controlled more reliably.

  For example, when the first threshold th1 is set for the amplitude value of the detection signal DS in the second water discharge form such as shower water discharge, the detection is performed even after the user leaves the automatic faucet 10 after the water discharge is started. There is a possibility that the amplitude value of the signal DS becomes equal to or more than the first threshold th1 and water cannot be stopped. On the other hand, when the second threshold th2 is set for the amplitude value of the detection signal DS in the first water discharge form such as rectified water discharge, the detection signal DS is performed even though the user is performing hand washing or the like. May temporarily be less than the second threshold th2 and unintentionally stop water discharge. In the automatic water faucet 10, such erroneous water discharge can be more reliably suppressed by switching between the first threshold th1 and the second threshold th2.

  Moreover, in the automatic water tap 10, the water stop control in the 2nd water discharge form can be controlled more correctly by lengthening the time until it stops in the 2nd water discharge form. For example, it is possible to prevent the water discharged from the water discharger 12 from stopping unintentionally.

  Moreover, in the automatic water tap 10, the control part 20 determines whether the water discharge from the water discharging part 12 is a 1st water discharge form or a 2nd water discharge form based on the detection signal DS. Thereby, control of the water stop of a 1st water discharge form and a 2nd water discharge form can be switched reliably. Moreover, the increase in the number of parts can be suppressed by using a detection signal for determination. For example, the manufacturing cost of the automatic faucet 10 can be suppressed.

(Second Embodiment)
FIG. 4 is a block diagram showing an automatic faucet according to the second embodiment.
As illustrated in FIG. 4, the automatic faucet 50 further includes a detection unit 52. Note that components that are substantially the same in function and configuration as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The detection unit 52 detects switching between the first water discharge form and the second water discharge form by the switching unit 14. The detection unit 52 is electrically connected to the control unit 20. The detection unit 52 inputs the detection result of switching by the switching unit 14 to the control unit 20. The detection unit 52 may be any switch or sensor that can detect the switching of the water discharge mode by the switching unit 14, such as a mechanical switch, an optical sensor, or a magnetic sensor.

  The control unit 20 switches the water stop control of the water discharge unit 12 based on the detection result of the detection unit 52. For example, when the first water discharge form is detected by the detection unit 52, the control unit 20 sets the first threshold th1 for the amplitude value of the detection signal DS to control the water stop, and the detection unit 52 When the second water discharge form is detected by the above, the second threshold th2 is set with respect to the amplitude value of the detection signal DS to control the water stop.

  In the automatic faucet 50 according to the present embodiment, the control unit 20 switches the water stop control of the water discharge unit 12 based on the detection result of the detection unit 52. Also in this case, the water stoppage control of the first water discharge form and the second water discharge form can be switched reliably. As described above, the first water discharge form and the second water discharge form may be detected based on the detection signal DS or may be detected by the detection unit 52.

  In each of the above embodiments, the first threshold th1 and the second threshold th2 are set for the amplitude value of the detection signal DS. For example, the first threshold th1 and the second threshold th2 may be set for the dispersion value of the detection signal DS (Doppler signal) to control the water stoppage of the water discharger 12. More specifically, the variance value is a value that represents a variation in the amplitude of the detection signal DS during a predetermined time. The dispersion value of the detection signal DS increases as the detected object approaches the radio wave sensor 18 and the fluctuation of the amplitude of the detection signal DS increases. Therefore, even when the first threshold value th1 and the second threshold value th2 are set for the dispersion value of the detection signal DS, similarly to the case of the amplitude value, the water stop is appropriately controlled to suppress erroneous water discharge. Can do.

The embodiment of the present invention has been described above. However, the present invention is not limited to these descriptions. As long as the features of the present invention are provided, those skilled in the art appropriately modified the design of the above-described embodiments are also included in the scope of the present invention. For example, the shape, dimensions, material, arrangement, and the like of each element included in the automatic water faucets 10, 50 are not limited to those illustrated, but can be changed as appropriate.
Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

  DESCRIPTION OF SYMBOLS 10, 50 Automatic faucet, 12 Water discharge part, 14 Switching part, 16 Solenoid valve, 18 Radio wave sensor, 20 Control part, 31 1st water discharge port, 32 2nd water discharge port, 52 Detection part

Claims (5)

A water discharger having a first water discharge form and a second water discharge form different from the first water discharge form;
A switching unit that switches between the first water discharge form and the second water discharge form of the water discharge part;
A radio wave sensor that detects a detected object and outputs a detection signal;
Based on the detection signal from the radio wave sensor, a control unit that controls water discharge from the water discharge unit,
With
The detection signal when water is discharged from the water discharge unit in the second water discharge form is larger than the detection signal when water is discharged from the water discharge part in the first water discharge form,
The said control part switches the water stop control of the said water discharging part with a said 1st water discharge form and a said 2nd water discharge form, The automatic water tap characterized by the above-mentioned. The control unit controls water discharge based on the amplitude value of the detection signal, and in the first water discharge mode, sets a first threshold for the amplitude value of the detection signal, and the second water discharge At the time of form, a second threshold is set for the amplitude value of the detection signal,
The automatic faucet according to claim 1, wherein the second threshold value is higher than the first threshold value.   In the second water discharge mode, the time from when the detected body comes out of the detection area of the radio wave sensor to when the water discharge unit is stopped is the time during which the detected body is in the first water discharge mode. 3. The automatic faucet according to claim 1, wherein the automatic faucet is longer than a time from when the water discharge part is stopped after leaving the detection area.   The controller determines whether the water discharged from the water discharger is in the first water discharge form or the second water discharge form based on the detection signal, and switches the water stop control of the water discharger. The automatic water faucet according to any one of claims 1 to 3. A detection unit that detects switching between the first water discharge form and the second water discharge form by the switching unit;
The automatic faucet according to any one of claims 1 to 3, wherein the control unit switches control of water stoppage of the water discharging unit based on a detection result of the detection unit.

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