JP2015178754A - water discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water discharge device for a wash stand or a kitchen, which has a radio wave sensor arranged on the back side of a bowl part, and which can still acquire information required for a control part to control a water discharge part even when a radio wave transmission region is under water.SOLUTION: The water discharge device includes a sensor part for emitting radio waves and receiving their reflected waves to output a detection signal on the basis of the reflected waves, and the control part for controlling water discharge and cutoff from a water discharge port on the basis of the detection signal. A bowl part is formed with an overflow port for preventing the overflow of water from the bowl part, and has an overflow pipe for guiding the water flowing into the overflow port to a drain pipe. The sensor part is arranged in a position where radio waves are emitted to the inside of the bowl part via the inside of the overflow pipe. It outputs a predetermined detection signal when the inside of the overflow pipe is in a predetermined state.

Description

  The present invention relates to, for example, a hand-washing place in a public toilet, a bathroom vanity, and a water discharge device provided in a kitchen, and particularly detects a user's hand or an object to be cleaned held by the user, The present invention relates to a water discharge device that automatically controls water discharge.

  2. Description of the Related Art There is known a water discharge device that detects movement of a human hand with a sensor and automatically discharges and stops water. Such a water discharge device is hygienic and widely used because it enables hand washing and the like without a person touching the handle. Conventionally, an infrared sensor is often used as a sensor for detecting a hand, but in recent years, a radio wave sensor is often used.

  The radio wave sensor is a sensor that radiates a microwave having a predetermined frequency, receives a reflected wave thereof, and detects an object to be detected (an object that reflects the microwave) based on the reflected wave.

  In the water discharge device using such a radio wave sensor, the radio wave sensor detects a speed change of the hand approaching (or moving away from) the water discharge port, and outputs a detection signal to the control unit. A control part controls opening and closing of a solenoid valve based on the said detection signal, and switches water discharge and water stop. Thereby, for example, when the hand reaches the lower side of the water discharge port, water discharge can be started.

  The radio wave sensor is disposed so as to radiate microwaves toward a space where a hand is inserted during hand washing, that is, a space below the water outlet. For this reason, the structure which arrange | positions a radio wave sensor in the vicinity of a water outlet, for example among spouts can be considered. However, in such a configuration, since it is necessary to house a radio wave sensor inside the spout and perform wiring, there is a problem that the spout becomes large.

  Therefore, in the water discharge device described in Patent Document 1 below, a radio wave sensor is disposed on the opposite side (back side) of the surface of the bowl portion that receives water. The microwave radiated from the radio wave sensor passes through a partial region of the bowl portion and travels to the upper water outlet. According to such a configuration, since the spout is not enlarged and the design of the spout is not restricted, the water discharge device with high design can be obtained.

Japanese Patent Laid-Open No. 2003-64741

  The water discharge device described in Patent Document 1 includes a drain plug at the bottom of the bowl portion so that water can be stored in the bowl portion. For this reason, when water is discharged with the drain plug closed, the water level of the bowl rises, and the area of the bowl where the radio wave from the radio wave sensor is transmitted (hereinafter referred to as “radio wave transmission area”) is submerged. May end up.

  Microwaves can permeate through a bowl made of resin, ceramics, etc., but water significantly attenuates the transmission of radio waves depending on the amount. For this reason, when the radio wave transmission region is submerged, it is difficult for the microwaves radiated from the radio wave sensor to reach the inside of the bowl portion. In such a state, even if hand washing is completed and the user's hand is pulled out of the space below the spout, the radio wave sensor is difficult to detect such movements and erroneous detection of the radio wave sensor is likely to occur. There was a problem.

The present invention has been made in view of such problems, and the object of the present invention is to provide a structure in which the radio wave sensor is arranged on the back side of the bowl portion, and even when the radio wave transmission region is submerged, the control unit is configured to discharge water. It is providing the water discharging apparatus in a washstand or a kitchen which can obtain information required when controlling.

  In order to solve the above problems, a water discharge device according to the present invention receives a water discharge unit having a water discharge port for discharging water, water discharged from the water discharge port, and discharges the water through a drain port. Based on the detection signal, a washbasin or kitchen bowl part to be discharged to the drain pipe, a sensor part that radiates the radiated radio wave and receives the reflected wave, and outputs a detection signal based on the reflected wave, A water discharge device comprising a control unit for controlling water discharge and water stoppage from the water discharge port, wherein the bowl portion is formed with an overflow port for preventing the water from overflowing from the bowl portion, An overflow pipe for guiding the water flowing into the overflow port to the drain pipe is provided, and the sensor unit is arranged at a position where radio waves are radiated into the bowl part through the overflow pipe. The interior of the overflow pipe is characterized by outputting a predetermined detection signal when a predetermined state.

  The water discharging device according to the present invention includes a sensor unit and a control unit, and can automatically discharge water and stop water using these. Specifically, the sensor detects the movement of the body to be detected (hand) below the spout and outputs a detection signal related to the movement. The control unit controls water discharge and water stop from the water discharge port based on the detection signal.

  The sensor unit is a so-called radio wave sensor that radiates radio waves, receives a reflected wave thereof, and outputs a detection signal related to the movement of the detected object based on the reflected wave. The sensor unit is disposed at a position where radio waves are radiated into the bowl part through the overflow pipe. Since the sensor unit is installed in this way, a detection signal inside the overflow pipe can be output even when the radio wave transmission region is submerged. As a result, it is possible to determine the use status based on the detection signal inside the overflow pipe, and even when the radio wave transmission area is submerged while the radio wave sensor is arranged on the back side of the bowl part, the control unit It is possible to provide a faucet device that can obtain information necessary for controlling the water.

  In the water discharging apparatus according to the present invention, when the water is flowing through the overflow pipe, the sensor unit outputs a detection signal corresponding to the state.

  Even in a bowl part that does not have a means to regulate the discharge of water toward the drain pipe (for example, a water tap), for example, foreign matter is clogged at the inlet of the drain pipe, and water is discharged from the bowl part to the drain pipe. May cause abnormalities. If water is discharged in such a state, the water level in the bowl portion may rise and the radio wave transmission region may be submerged. As a result, even when hand washing is completed and the user's hand is pulled out from the space below the spout, there is a problem that the radio wave sensor is difficult to detect such movement and erroneous detection of the radio wave sensor is likely to occur. .

  If the radio wave sensor detects a mistake and water discharge continues, the water level in the bowl rises to the overflow port, and water begins to flow into the overflow pipe. For this reason, the radio wave transmission region is submerged while the radio wave sensor is arranged on the back side of the bowl part by arranging the sensor part at a position where the radio wave is radiated into the bowl part through the overflow pipe. Even in the case, it is possible to provide a faucet device that can obtain information necessary for the control unit to control the water discharge unit.

  Moreover, in the water discharging apparatus concerning this invention, the said control part is made to reduce the flow volume of the said water discharged from the said water discharging part, when the said water which flows through the inside of the said overflow pipe exceeds 1st flow volume. It is characterized by controlling.

  In a state where water exceeding the first flow rate is flowing inside the overflow pipe, there is a very high possibility that abnormality has occurred in the discharge of water from the bowl portion to the drain pipe, and the water that can be discharged to the drain pipe There is a possibility that the flow rate of is smaller than the flow rate of the discharged water.

  In this mode, the radio wave transmission area is prevented from being submerged by reducing the flow rate of water discharged by the control unit and making the flow rate of discharged water smaller than the flow rate of water that can be discharged to the drain pipe. In addition, erroneous detection of the radio wave sensor can be prevented.

  Moreover, in the water discharging apparatus according to the present invention, the control unit controls the water discharged from the water discharging unit to stop when the water flowing inside the overflow pipe exceeds a second flow rate. It is characterized by doing.

  In the state where water exceeding the second flow rate is flowing inside the overflow pipe, there is a very high possibility that abnormality has occurred in the discharge of water from the bowl portion to the drain pipe, and the water is drained from the drainage basin. It may not be.

  In this aspect, the control unit controls the water discharged from the water discharging unit to stop, so that water discharge is continued indefinitely even though the user's hand is pulled out from the space below the water discharge port. Therefore, it is possible to prevent generation of wasted water.

  Moreover, in the water discharging apparatus concerning this invention, the said control part memorize | stores the threshold value which judged that the said water flowed inside the said overflow pipe | tube, and correct | amends the said threshold value after the predetermined period passes.

  In some cases, the inside of the overflow pipe may infiltrate and adhere to the inner wall or the like by splashing when washing hands or the like with water overflowing from the overflow port or water discharged from the water discharge port. In such a case, there is a possibility that the detection signal of the water flowing inside the overflow pipe is changed by the intruded water.

  In this aspect, a threshold value at which it is determined that water has flowed through the overflow pipe is stored, and the threshold value is corrected after a predetermined period has elapsed. By correcting the threshold value of the control unit in this way, water discharge can be started / stopped or continued even when the detection signal of the water flowing inside the overflow pipe changes, thereby preventing erroneous detection of the radio wave sensor. Can do.

  According to the present invention, water discharge can be obtained when the control unit controls the water discharge unit even when the radio wave transmission region is submerged while the radio wave sensor is arranged on the back side of the bowl unit. An apparatus can be provided.

It is sectional drawing which shows the structural drawing of the water discharging apparatus which concerns on embodiment of this invention. It is a figure for demonstrating the structure of a sensor part and a control part among the water discharging apparatuses shown in FIG. It is a flowchart which shows the flow of the process performed by a control part. It is a figure for demonstrating operation | movement of the water discharging apparatus shown in FIG. It is a figure for demonstrating operation | movement of the water discharging apparatus shown in FIG. It is a figure for demonstrating operation | movement of the water discharging apparatus shown in FIG. It is a figure for demonstrating operation | movement of the water discharging apparatus shown in FIG. It is a figure for demonstrating operation | movement of the water discharging apparatus shown in FIG. It is a figure for demonstrating operation | movement of the water discharging apparatus shown in FIG. It is a figure for demonstrating operation | movement of the water discharging apparatus shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  FIG. 1 is a cross-sectional view schematically showing the structure of a water discharge device according to an embodiment of the present invention. The water discharge device is a water discharge device provided in a hand-washing place of a public toilet, a bathroom vanity, or a kitchen, and is used when a user wash hands. As shown in FIG. 1, the water discharge device includes a spout (water discharge unit) 10, a bowl unit 20, a control unit 50, and a sensor unit 60.

  The spout 10 is a member for discharging water downward, and is arranged so as to rise upward from an upper surface 22 of the bowl portion 20 described later. A water flow path is formed inside the spout 10, and a water discharge port 11, which is a water outlet, is formed at the downstream end of the spout 10. Moreover, the upstream edge part of the said flow path is opening in the lower end of the spout 10, and the water supply pipe 40 is connected from the downward direction. The water supply pipe 40 is a pipe for supplying water from a water pipe (not shown) toward the spout 10, and is connected to the lower end of the spout 10 through the bowl portion 20. The water supplied to the spout 10 from the water supply pipe 40 reaches the water discharge port 11 through the flow path inside the spout 10, and is then discharged from the water discharge port 11 toward the bowl portion 20 below.

  An open / close valve 41 is disposed in the water supply pipe 40. The on-off valve 41 is an electromagnetic valve that is operated by a solenoid, and switches between opening and closing the flow path from the water pipe to the spout 10. In other words, the water discharge from the water discharge port 11 and the water stop are switched.

  The bowl portion 20 receives water discharged from the water outlet 11 and discharges the water to the drain pipe 30. The bowl portion 20 is a pottery having a horizontal upper surface 22. A concave bowl surface 21 is formed on the upper surface 22 as a surface for receiving water. A drain port 23 is formed at the bottom of the bowl surface 21, and the drain port 23 is connected to an upper end of a drain tube 30 that is a pipe connected to the sewage pipe. The water received by the bowl surface 21 is guided along the bowl surface 21 to the drain port 23. Then, it is discharged to the drain pipe 30.

  An overflow port 24 is formed in the upper part of the bowl surface 21. The overflow port 24 is for preventing water from overflowing from the bowl portion 20. When the water level in the bowl part 20 rises, the water stored in the bowl part 20 flows into the overflow port 24. For this reason, it is prevented that water overflows from the edge of the bowl surface 21.

  The overflow pipe 25 is a pipe for guiding the water flowing into the overflow port 24 to the drain pipe 30. In the present embodiment, the overflow pipe 25 is disposed along the back surface of the bowl portion 20. One end of the overflow pipe 25 is connected to the overflow port 24 from the back side, and the other end of the overflow pipe 25 is branched and connected to the drain pipe 30 below the drain port 23.

  The control unit 50 controls the operation of the on-off valve 41 based on a detection signal from the sensor unit 60 described later. The control unit 50 and the on-off valve 41 are connected by a signal line. A control signal for switching opening / closing of the on-off valve 41 is transmitted from the control unit 50 to the on-off valve 41 through a signal line. In addition, you may further provide the signal wire | line for feeding back the operation state of the on-off valve 41 toward the control part 50. FIG.

  The sensor unit 60 is for detecting the movement of the hand H of the user M so that water discharge and water stop can be performed at appropriate timing. The sensor unit 60 is a so-called radio wave sensor, which radiates a microwave (radio wave) in a predetermined direction and receives the reflected wave, and an object to be detected (an object reflecting the microwave) based on the reflected wave. The detection signal regarding is output.

  The sensor unit 60 is disposed at a position where radio waves are radiated into the bowl unit 20 through the overflow pipe 25, and the microwave radiated from the transmission unit 61 passes through the overflow pipe 25 and passes through the bowl unit 25. It arrange | positions so that it may go inside 20.

  As shown in FIG. 1, by arranging the sensor unit 60 at a position where radio waves are radiated into the bowl unit 20 through the overflow pipe 25, the sensor unit 60 can be used as a hand H in the bowl unit 20. The internal state of the overflow pipe 25 can be detected along with the movement of the detection object. As a result, it is possible to provide a faucet device that can obtain information necessary when the controller 50 controls the water discharger 10.

  The configuration of the sensor unit 60 and the control unit 50 will be further described with reference to FIG. FIG. 2 is a diagram for explaining the configuration of the sensor unit 60 and the control unit 50 in the water discharge device.

  The sensor unit 60 includes a transmission unit 61, a reception unit 62, and a mixer circuit 64. The transmission unit 61 is an antenna for radiating a signal SG having a predetermined frequency (transmission frequency SF) generated by the oscillation circuit 63 as a microwave toward the inside of the bowl unit 20 through the inside of the overflow tube 25. . The receiving unit 62 is an antenna for receiving the reflected wave that has been radiated from the transmitting unit 61 and then reflected and returned by the detected object. When receiving the reflected wave, the receiving unit 62 converts the received wave into a signal RG that is a signal corresponding to the frequency and intensity of the reflected wave.

  When the detected object is stationary, the frequency of the reflected wave and the signal RG is equal to the transmission frequency SF. On the other hand, when the detected object is moving, the frequency of the reflected wave and the signal RG changes due to the Doppler effect. Specifically, the absolute value of the value obtained by subtracting the transmission frequency SF from the frequency of the reflected wave and the signal RG increases as the speed of the detection object increases.

  In addition, the closer the distance from the transmission unit 61 to the detection object, the higher the intensity of the reflected wave, since the microwave returns as a reflected wave with a small attenuation. For this reason, the strength of the signal RG also increases. Since the signal RG is a potential vibration, the intensity of the signal RG here may be referred to as the magnitude of the potential at the center of the vibration.

  The mixer circuit 64 is a circuit that receives the signal SG and the signal RG and outputs a detection signal DG based on the signals SG and RG. The value of the frequency of the detection signal DG output from the mixer circuit 64 is equal to the absolute value of a value obtained by subtracting the transmission frequency SF (frequency of the signal SG) from the frequency of the signal RG. Further, the intensity of the detection signal DG is equal to the intensity of the signal RG. That is, the detection signal DG and the signal RG, which are potential oscillations, have the same potential magnitude at the center of each oscillation. The detection signal DG is output to the control unit 50 through a signal line.

  The control unit 50 includes a speed extraction unit 51, a determination unit 52, and a storage unit 53. The detection signal DG is detected by the speed extraction unit 51 that extracts the speed of the detected object, and the state of the detected object is identified, and the result is compared with the threshold value previously designed in the storage unit 53 by the determination unit 52. . The speed extraction unit 51 may be configured by FFT or may be configured by a filter. However, when complex calculation can be performed, the former is selected, and the obtained signal is not a single signal but a predetermined band. In some cases, it is desirable to select the latter, and in this embodiment, a filter is used.

  Next, a specific operation of the water discharge device will be described with reference to FIGS. 3 to 10. FIG. 3 is a flowchart showing a flow of processing performed by the control unit 50. FIGS. 4 to 10 are diagrams for explaining the operation of the water discharge device, and show the state of the water discharge device at each time point.

  4A to 10A illustrate the state of the water discharge device and the state of water discharged from the water discharge port 11 (hereinafter referred to as “water WT”). Further, in FIG. 4 to FIG. 10B, the time change of the detection signal DG input to the determination unit 52 is shown in a graph. Among these, the graph G1 shows the detection signal DG.

  Further, the graph G2 shows a temporal change in the intensity of the detection signal DG. That is, when the detection signal DG output from the mixer circuit 64 is regarded as a vibration of the potential, the time change of the potential at the center of the vibration (hereinafter also referred to as “reference potential”) is shown.

  When the user M is not present near the water discharge device, the water discharge device is in a standby state (step S01 in FIG. 3). At this time, water discharge from the water discharge port 11 is not performed. Based on the detection signal DG, the control unit 50 determines whether or not to start water discharge while monitoring the presence or absence of the hand H of the user M heading under the water discharge port 11 and toward the internal space of the bowl unit 20 (water discharge determination). ) Is repeated.

  FIG. 4 shows the state of the water discharging device in such a standby state. From the sensor unit 60, microwaves are always emitted toward the inside of the bowl unit 20 through the inside of the overflow pipe 25. In the state shown in FIG. 4, the user M is approaching the water discharge device, but there is no object (hand H or the like) below the water discharge port 11 and in the internal space of the bowl portion 20. Not done. For this reason, the microwave which returns to the sensor part 60 as a reflected wave is few. In addition, the frequency of the reflected wave substantially matches the transmission frequency SF. As a result, the frequency of the detection signal DG output from the mixer circuit 65 is almost zero.

  Accordingly, as shown in FIG. 4B, the detection signal (graph G1) has a constant potential of 0 in magnitude. Further, the reference potential (graph G2) is a low potential and constant.

  FIG. 5A shows a state in which the user M who is about to start hand washing has put out his hand H below the spout 11. The hand H enters the space below the spout 11 while decelerating and stops in a state where a part of the hand H hits the microwave. The microwave hitting the hand H is reflected and returns to the sensor unit 60 as a reflected wave.

  At this time, water discharge from the water discharge port 11 has not yet started. For this reason, as shown in FIG. 5B, the detection signal (graph G1) is a signal having a waveform of the hand H. Since the hand H gradually decelerates, the vibration frequency of the hand component is large in the initial stage, and the frequency decreases with time. Further, since the hand H gradually approaches the transmitter 61, the intensity of the detection signal DG output from the mixer circuit 64 gradually increases. As a result, the amplitude of the hand component is initially small, and the amplitude increases with time. Furthermore, the reference potential also increases with time.

  When the detection signal (graph G1) has changed as described above, the control unit 50 ends the water discharge determination in step S01 and performs control to start water discharge (step S02 in FIG. 3). The water discharge determination may be performed based on a change in the reference potential instead of a change in the detection signal. Specifically, water discharge may be started when the reference potential rises and exceeds a predetermined threshold as shown in the graph G2 of FIG.

  When the control unit 50 detects the movement of the hand H of the user M approaching as described above, the control unit 50 transmits a control signal to open the on-off valve 41. (A) of FIG. 6 has shown the state by which water discharge was started by such control. As shown in FIG. 6A, at least a part of the water WT discharged from the water discharge port 11 hits the hand H and is scattered downward and is received by the bowl surface 21. Thereafter, the liquid is guided to the drain outlet 23 along the bowl surface 21 and discharged to the drain pipe 30.

  Both the scattered water and the hand H move while reflecting microwaves. For this reason, as shown in FIG. 6B, the detection signal (graph G1) is a signal having a vibrating waveform.

  After water discharge is started in step S02, the control unit 50 repeatedly determines whether or not to stop water discharge (water stop determination) based on the detection signal DG shown in FIG. Step S03 in FIG. 3). While the scattered water component and the hand component are in a waveform signal that vibrates, it is estimated that the user M is performing hand washing. For this reason, the control part 50 is controlled not to stop water during such a period, but to continue water discharge.

  When the hand washing is finished, the user M pulls out the hand H from below the spout 11. FIG. 7A shows a state immediately after the hand H is pulled out. At this time, water discharge from the water discharge port 11 is continuously performed, but the discharged water WT does not hit the hand H but directly reaches the bowl surface 21. For this reason, the discharged water WT is rectified.

  Even in the state of FIG. 7A, the water WT that has reached the bowl surface 21 is guided along the bowl surface 21 to the drain port 23 and discharged to the drain pipe 30. The microwaves are reflected by the rectification (side surfaces) and the hand H, and each reflected wave returns to the sensor unit 60.

  In FIG. 7B, the time when the microwave is no longer reflected by the hand H in the process of pulling out the hand H is shown as time t1. Prior to time t1, since the detection signal (graph G1) is gradually moved away from the transmission unit 61, the strength of the detection signal DG output from the mixer circuit 64 gradually decreases. As a result, the amplitude decreases as it approaches time t1. Furthermore, the reference potential (graph G2) also decreases with time.

  After time t1, only rectification from the spout 11 exists. For this reason, the detection signal (graph G1) is a signal having a waveform in which the rectification component vibrates. Further, the reference potential (graph G4) is a low potential and constant.

  As shown in FIG. 7B, when the waveform of the vibrating detection signal (graph G1) is in a state of only the rectification component, the control unit 50 that has performed the water stop determination in step S03 performs the hand washing operation of the user M. Is determined to be completed, and control is performed to stop water discharge from the water discharge port 11.

  Even after the water discharge is stopped, the microwave is continuously radiated to the inside of the bowl portion 20 through the inside of the overflow pipe 25, and thereafter returns to the standby state shown in FIG.

  FIG. 8 is a diagram for explaining a state where the drain port 23 is clogged with the foreign object Ob. FIG. 8A shows a state after the user M puts out the hand H and water discharge is started while the drain port 23 is clogged with the foreign matter Ob. Since the discharged water WT cannot flow into the drain port 23, it is accumulated in the bowl portion 20. As a result, the water level in the bowl portion 20 is rising, and the radio wave transmission region is submerged as shown in FIG.

  FIG. 8B shows temporal changes of the detection signal (graph G1) and the reference potential (graph G2) when the radio wave transmission region is submerged in this way.

  When the radio wave transmission region is submerged, the microwave radiated from the sensor unit 60 is reflected by water. At this time, since the reflecting surface (the boundary surface between the bowl portion 20 and water) does not move, the frequency of the reflected wave substantially matches the frequency of the radio wave radiated from the sensor unit 60. In addition, since the distance between the reflecting surface and the sensor unit becomes short, the radio wave radiated from the sensor unit 60 returns to the sensor unit as a reflected wave with almost no attenuation. Therefore, the magnitude of the detection signal (graph G1) is constant at 0, and the reference potential (graph G2) is constant at a high potential. In such a state, even if the hand washing is finished and the hand H of the user M is pulled out from the space below the spout 11, the waveform of the detection signal (graph G1) as shown in FIG. The control unit 50 that has performed the water stoppage determination in step S03 does not enter the state of only the rectifying component, determines that the hand washing operation of the user M has been completed, and performs control to stop water discharge from the water discharge port 11. I can't.

  FIG. 9 is a view for explaining a state in which the hand washing operation is continued in a state where the drain port 23 is clogged with the foreign matter Ob.

  FIG. 9B shows temporal changes of the detection signal (graph G1) and the reference potential (graph G2) when the radio wave transmission region is submerged in this way.

  The reference potential (graph G2) is constant at a high potential as in FIG. However, since the detection signal (graph G1) is installed at a position where the radio wave is radiated to the inside of the bowl part 20 through the inside of the overflow pipe 25, even when the radio wave transmission area is submerged. The internal state of the overflow pipe 25 can be determined.

  As described above, in the water discharge device according to the present embodiment, the water discharge unit 10 having the water discharge port 11 for discharging water, the water discharged from the water discharge port 11 and the drain port 23 are provided. A washbasin or a kitchen bowl 20 that discharges the water to the drain pipe 30; a sensor 60 that radiates the emitted radio waves and receives the reflected waves; and outputs a detection signal based on the reflected waves; A water discharge device including a control unit 50 that controls water discharge and water stop from the water discharge port 11 based on the detection signal, wherein the bowl unit 20 overflows water from the bowl unit 20. An overflow port 24 is formed to prevent the water from flowing into the overflow port 24, and the overflow pipe 25 is used to guide the water to the drain pipe 30. -It is arranged at a position for radiating radio waves into the bowl portion 20 through the inside of the flow pipe 25, and outputs a predetermined detection signal when the inside of the overflow pipe 25 is in a predetermined state. . As a result, even when the radio wave sensor is arranged on the back side of the bowl portion 20, even when the radio wave transmission region is submerged, the control unit 50 can obtain information necessary for controlling the water discharge unit 10. A plug device can be provided.

  In the present invention, when the water flows through the overflow pipe 25, the sensor unit 60 outputs a detection signal corresponding to the state.

  For example, when a detection signal corresponding to the state is output, a notification means such as an alarm notifies the user M that the state is abnormal, thereby prompting maintenance. In this way, it is possible to prevent the state overflowing from the overflow port 24 from being continued.

  When the radio wave sensor erroneously detects and water discharge continues, the water level of the bowl portion 20 rises to the overflow port 24 and water begins to flow into the overflow pipe 25. For this reason, by arranging the sensor unit 60 at a position where the radio wave is radiated into the bowl unit 20 through the overflow pipe 25, the radio wave sensor is disposed on the back side of the bowl unit 20. Even when the region is submerged, it is possible to provide a faucet device that can obtain information necessary for the control unit 50 to control the water discharge unit 10.

  In the present invention, the control unit controls to decrease the flow rate of the water discharged from the water discharger when the water flowing inside the overflow pipe exceeds a first flow rate. And

  In the state where water exceeding the first flow rate is flowing inside the overflow pipe 25, there is a very high possibility that an abnormality has occurred in the discharge of water from the bowl portion 20 to the drain pipe 30. There is a possibility that the flow rate of water that can be discharged is smaller than the flow rate of discharged water.

  In this aspect, the flow rate of the water WT discharged by the control unit 50 is reduced to be less than the flow rate of water that can be discharged to the drain pipe 30, thereby preventing the radio wave transmission region from being submerged, False detection can be prevented.

  In the present invention, the control unit controls the water discharged from the water discharging unit to stop when the water flowing inside the overflow pipe exceeds a second flow rate. To do.

  In the state where water exceeding the second flow rate is flowing inside the overflow pipe, there is a very high possibility that an abnormality has occurred in the discharge of water from the bowl portion 20 to the drain pipe 30, and May not be drained.

  In this aspect, the control unit 50 controls the water WT discharged from the water discharge unit 10 to stop, so that the water discharge is performed even though the user's hand is pulled out from the space below the water discharge port. It is possible to prevent the wasteful water from being generated forever. Depending on the control, when the second flow rate is made equal to the first flow rate and a state in which water exceeding the first flow rate flows in the overflow pipe 25 is detected, the water flow is stopped without decreasing the flow rate. May be.

  In addition, sprinkled water such as during hand washing temporarily enters the overflow pipe 25 in spite of the state where water is not accumulated in the bowl portion 20, and water exceeding the second flow rate flows, and the water discharge portion 10. There is a possibility that the water WT discharged from the water will be stopped. In order to prevent such a situation from occurring, the internal state of the overflow pipe 25 is determined after detecting that the reference voltage has exceeded a predetermined threshold value. For example, the on-off valve 41 is closed during normal hand washing. It is preferable to prevent this.

  The inside of the overflow pipe 25 may infiltrate and adhere to the inner wall or the like due to splashing when washing hands or the like with water overflowing from the overflow port 24 or water discharged from the water discharge port 11, for example. FIG. 10 is a diagram for explaining a state in which water has accumulated in the overflow pipe 25.

  In this invention, the said control part 50 memorize | stores the threshold value judged that the said water flowed through the inside of the said overflow pipe | tube 25, and correct | amends the said threshold value after predetermined time passed.

  When it is determined that water has flowed through the overflow pipe 25, water stays inside the overflow pipe 25 as shown in FIG. 10A, and the detection signal of the next flowing water can change. However, the water staying in the overflow pipe is discharged or dried over time.

  In this aspect, a threshold value at which water is determined to have flowed through the overflow pipe 25 is stored, and the threshold value is corrected after a predetermined period has elapsed. By correcting the threshold value of the control unit in this way, water discharge can be started, stopped, or continued even when the detection signal of the water flowing inside the overflow pipe 25 changes, and erroneous detection of the radio wave sensor is prevented. be able to.

  In addition, it is preferable to change not only the water which flowed through the overflow pipe 25 but also the threshold value at which water discharge is started as the threshold value to be corrected.

  Specifically, FIG. 10A shows a state in which the user M has pushed out the hand H in a state where water has accumulated in the overflow pipe 25. The radio wave radiated into the bowl portion 20 through the overflow pipe 25 is attenuated by the water inside the overflow pipe 25, and thus the detection signal DG of the reflected wave that hits the hand H and decreases.

  FIG. 10B shows temporal changes of the detection signal (graph G1) and the reference potential (graph G2) in a state where water has accumulated in the overflow pipe 25 in this way.

  The detection signal (graph G1) is a signal having a waveform of a hand H. Since the hand H gradually decelerates, the vibration frequency of the hand component is large in the initial stage, and the frequency decreases with time. Further, since the hand H gradually approaches the transmitter 61, the intensity of the detection signal DG output from the mixer circuit 64 gradually increases. As a result, the amplitude of the hand component is initially small, and the amplitude increases with time. Furthermore, the reference potential also increases with time. However, the magnitude of the amplitude is smaller than the magnitude shown in FIG. 5B, and the control unit 50 does not exceed the threshold for opening the on-off valve 41. Further, the reference potential is constant at a position where the potential is high because water stays in the vicinity of the sensor unit 60.

  Therefore, a predetermined state inside the overflow pipe 25 is learned, and the threshold value of the control unit 50 is corrected. When the water stays in the overflow pipe 25 and the reflected wave of the object to be detected such as the hand H is small, water discharge is started by lowering the threshold, and the user M feels uncomfortable and easy to use. It can be prevented that the user feels bad.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like 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.

10: Spout (water discharge part)
DESCRIPTION OF SYMBOLS 11: Water outlet 20: Bowl part 21: Bowl surface 22: Upper surface 23: Drain port 24: Overflow port 25: Overflow pipe 30: Drain pipe 40: Water supply pipe 41: On-off valve 50: Control part 51: Speed extraction part 52: Determination unit 53: Storage unit 60: Sensor unit 61: Transmission unit 62: Reception unit 63: Oscillation circuit 64: Mixer circuit DG: Detection signal M: User H: Hand Ob: Foreign object SF: Transmission frequency WT: Water

Claims (5)

A water discharge portion having a water discharge port for discharging water;
While receiving the water discharged from the water outlet, a wash basin or a bowl part of the kitchen that discharges the water to the drain pipe through the water outlet,
A sensor unit that radiates the radiated radio wave, receives the reflected wave, and outputs a detection signal based on the reflected wave;
A water discharge device comprising: a control unit that controls water discharge and water stop from the water discharge port based on the detection signal;
The bowl part is formed with an overflow port for preventing the water from overflowing from the bowl part, and has an overflow pipe for guiding the water flowing into the overflow port to the drain pipe,
The sensor unit is disposed at a position where radio waves are radiated into the bowl part through the overflow pipe, and outputs a predetermined detection signal when the inside of the overflow pipe is in a predetermined state. The water discharge device in the wash basin or kitchen characterized.   The said sensor part outputs the detection signal corresponding to the said state, when the said water flows through the inside of the said overflow pipe, The water discharging apparatus in the washstand or kitchen of Claim 1 characterized by the above-mentioned.   The said control part is controlled so that the flow volume of the said water discharged from the said water discharging part may be decreased when the said water which flows through the inside of the said overflow pipe exceeds 1st flow volume. The water discharging apparatus in the washstand or kitchen of 2.   The said control part is controlled so that the said water discharged from the said water discharging part may be stopped when the said water which flows through the inside of the said overflow pipe exceeds 2nd flow volume. The water discharging apparatus in the wash basin or kitchen described in 1.   The said control part memorize | stores the threshold value which judged that the said water flowed through the inside of the said overflow pipe, and correct | amends the said threshold value after predetermined | prescribed period passes, The any one of the Claims 1 thru | or 4 characterized by the above-mentioned. The water discharge apparatus in the wash basin or kitchen of 1 item | term.

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