JP6123550B2 - Drainage equipment - Google Patents

Description

  The present invention relates to a drainage device that opens and closes a drain plug such as a bathtub.

  A display device and a hot water supply device of a smart house and a HEMS (Home Energy Management System) are connected to a network server. Accordingly, it is possible to fill the hot water supply apparatus by operating a remote operation terminal such as a smartphone from the outside.

  In order to perform hot water filling from outside, it is necessary to close the bathtub stopper before going out. However, if you have forgotten to close the bathtub, you have to refill the hot water after returning home, and there is a problem that the hot water is wasted. Therefore, a technique for solving such a problem is disclosed in Patent Document 1. Patent Document 1 discloses a drainage device that electrically opens and closes a drain plug not only manually but also remotely.

JP 2000-73426 A

  In the drainage device described in Patent Document 1, the manual operation has a problem that the manual operation unit and the crankshaft interfere with each other unless the crankshaft is returned to around 0 °, and the manual operation cannot be performed. Therefore, there is a problem that manual operation cannot be performed after remote operation.

  Therefore, the present invention has been made in view of the above-described problems, and an object thereof is to provide a drainage device that can be manually operated even after remote operation.

  The present invention employs the following technical means in order to achieve the aforementioned object.

  In the present invention, when the opening / closing operation is performed by the remote operation unit, the position of the direct operation unit detected by the first detection unit after controlling the rotational drive of the driving unit and completing the opening / closing by the remote operation, The drive unit is further driven to rotate according to the angular position of the rotation unit detected by the second detection means, and the drive unit is controlled so that the rotation unit is located at a position excluding the interference range. .

  According to the present invention, the user can open and close the drain plug by directly operating the operation unit, and can also open and close the drain plug by operating the remote control unit. In addition, when the opening / closing operation is performed by the remote operation unit, the control unit is driven according to the detected position of the direct operation unit and the detected angular position of the rotating unit after the opening / closing by the remote operation is completed. The part is further rotated. Therefore, the control unit does not stop the rotation when the opening / closing operation is completed, but controls the rotation unit to further rotate until the position excluding the interference range not directly affected by the operation unit. Thereby, even after the opening / closing operation by the remote operation unit is performed, the direct operation is possible.

  In addition, the code | symbol in the bracket | parenthesis of each above-mentioned means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is a lineblock diagram showing hot water supply device 10 of a 1st embodiment. It is a front view which shows the bathroom remote control 41. FIG. It is a front view which shows the kitchen remote control. It is a figure which shows the screen displayed on the smart phone. 2 is a cross-sectional view showing a drainage device 30. FIG. FIG. 6 is a cross-sectional view seen from a section line VI-VI in FIG. 5. FIG. 7 is a cross-sectional view seen from a cutting plane line VII-VII in FIG. 6. It is a figure which shows the state which has the crank 34 in the position of 90 degree | times. It is a figure which shows the state which has the crank 34 in the position of 180 degree | times. It is a figure which shows the state which has the crank 34 in the position of 270 degree | times. It is a figure which shows the state which has the crank 34 in the 0 degree position. It is a figure which shows the state which pressed down the manual switch 33 in the state in which the crank 34 exists in a 0 degree position. It is a figure which shows the state which has the crank 34 in the position of 50 degree | times. It is a figure which shows the state which pressed down the manual switch 33 in the state in which the crank 34 exists in a 50 degree position. 4 is a timing chart showing the waveform of each sensor and the operating position of the drainage device 30. 3 is a flowchart illustrating hot water filling control by a control unit 20. It is a flowchart which shows opening control. It is a flowchart which shows closing control. It is a flowchart which shows initial control. It is a timing chart which shows an example of initial control. It is a timing chart which shows the other example of initial control. It is a flowchart which shows opening control. It is a flowchart which shows closing control. It is a timing chart which shows opening control and closing control. It is a block diagram which shows 10 A of hot water supply apparatuses of 2nd Embodiment. It is a block diagram which shows the hot water supply apparatus 10B of 3rd Embodiment. It is a block diagram which shows 10C of hot water supply apparatuses of 4th Embodiment.

  Hereinafter, a plurality of embodiments for carrying out the present invention will be described with reference to the drawings. In some embodiments, portions corresponding to the matters described in the preceding embodiments may be given the same reference numerals, or one letter may be added to the preceding reference numerals, and overlapping descriptions may be omitted. In addition, when a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those of the embodiment described in advance. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination does not hinder the combination.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. A water heater 11 of the hot water supply apparatus 10 is composed of a heat pump, and is connected to a pipe portion serving as a heat pump going-out portion 13 and a heat pump return portion 14 that are connected to the hot water storage tank portion 12. The hot water storage tank unit 12 is a part including a hot water storage tank (not shown) and surrounding piping and equipment, and also includes a control unit 20.

  Hot water is supplied from the hot water storage tank unit 12 to the hot water supply port 15 via a hot water supply pipe. Further, a circulation circuit 17 is connected from the hot water storage tank section 12 to the bathtub 16 of the bathroom, and is connected to the bathtub 16 and circulates the bathtub water with a bath pump (not shown). A bathtub adapter 18 that is installed at a predetermined height from the bottom of the bathtub 16 and connects the circulation circuit 17 to the bathtub 16 is provided in the bathtub 16.

  A drainage device 30 that opens and closes a drain plug 19 that drains water in the bathtub 16 via a wire (also referred to as a control wire or a control cable) 31 is provided on a side surface of the bathtub 16. The drainage device 30 is driven by signals from the bathroom remote control 41 and the kitchen remote control 42 to open and close the drain plug 19. Further, the drainage device 30 opens and closes the drainage plug 19 with a signal received via the server 44 from the information terminal device such as the smartphone 43.

  The hot water heater 11 and the hot water storage tank section 12 are installed outdoors. In the hot water heater 11 and the hot water storage tank section 12, tap water is supplied with a stop cock 22 on the water pipe 21, a pressure reducing valve 23, and a check valve 24 for water supply. And the valve 25 and the like.

  A bathroom remote controller 41 functioning as a remote device placed in the bathroom and a main kitchen remote controller 42 functioning as a remote device placed in the kitchen include a communication line and a power line from the control unit 20 in the hot water storage tank unit 12. A control signal and power are supplied through a pipe 53 including

  Next, the configuration of the hot water storage tank unit 12 will be described. A hot water storage tank (not shown) in the hot water storage tank unit 12 stores and keeps hot water boiled by the water heater 11. Tap water is supplied from the water pipe 21 to the bottom of the hot water storage tank, and hot water circulates from the heat pump return section 14 to the hot water storage tank via a check valve.

  When hot water is supplied to the bathtub 16, hot water is poured into the bathtub 16 via a bathtub adapter 18 (not shown) that detects the amount of water from the hot water storage tank, and the like. A bathtub adapter 18 that is installed at a predetermined height from the bottom of the bathtub 16 and connects the circulation circuit 17 to the bathtub 16 is provided in the bathtub 16.

  Of the remote control (remote device) that supplies an operation signal to the control unit 20 in the hot water tank unit 12 and displays the control state of the control unit 20, a communication signal is sent from the bathroom remote control 41 to the drainage device 30 that opens and closes the drain plug 19. And the power supply are supplied by the wiring 54.

  Next, the operation screen of the remote device will be described with reference to FIGS. As shown in FIG. 2, the bathroom remote controller 41 displays the set temperature, the amount of hot water stored in the hot water storage tank, and the like. There are also an automatic bath switch 45 and a call switch 46, which can automatically store a predetermined amount of hot water in the bathtub 16 or make a call via the kitchen remote control 42. Further, the drain plug 19 can be opened and closed by operating the drain plug switch 47.

  As shown in FIG. 3, the kitchen remote controller 42 can be operated not only by the water heater but also by other devices. For example, the home electronic lock 48, the air conditioner 49, the floor heating 50, etc. can be operated. In addition, information such as the power consumption of each room can be displayed as the current house situation. Similarly to the bathroom remote control 41, there are an automatic bath switch 45 and a call switch 46, and a predetermined amount of hot water can be automatically stored in the bathtub 16 or a call can be made via the bathroom remote control 41. Further, the drain plug 19 can be opened and closed by operating the drain plug switch 47. The open / close state of the drain plug 19 is also displayed so as to be visible by changing the display mode.

  As shown in FIG. 4, the same operation as that of the kitchen remote controller 42 can be performed by the smartphone 43. The smartphone 43 is connected to the control unit 20 via the kitchen remote controller 42, the router 51, and the server 44. Therefore, the smartphone 43 can wirelessly communicate with the router 51 via the server 44. The control unit 20 also functions as a transmission unit that transmits information related to the state of each unit, for example, the open / close state of the drain plug 19, to the remote operation unit such as the smartphone 43 via the server 44 via wireless communication. The smartphone 43 functions as a receiving unit that receives information transmitted from the control unit 20 and includes an output unit that outputs the received information. As shown in FIG. 4, the output unit may be a display screen, may be an audio output, or may be output by vibration. Accordingly, the open / close state of the drain plug 19 is displayed on the front screen of the smartphone 43. Accordingly, the user can check the open / close state of the drain plug 19 using the smartphone 43 and can further operate the drain plug switch 47. When the drain plug switch 47 of the smartphone 43 is operated, an operation command for the drain plug switch 47 is given to the kitchen remote controller 42 via the server 44 and the router 51. Then, an operation command is transmitted from the kitchen remote control 42 to the control unit 20, and the opening / closing control of the drain plug 19 is performed. In addition, the smartphone 43 can also perform remote operation for executing bath automatic (hot water) and hot water reservation operation.

  Next, the drainage device 30 will be described with reference to FIGS. The drainage device 30 includes a case 32, a manual switch 33, a crank 34, a connecting rod 35, a manual thrust transmission member 36, a thrust receiving member 37, a knock cam 38, a motor 39, an upper sensor 61 and an open sensor 62. The The drainage device 30 has a crank mechanism. When the connecting rod 35 connected to the crank 34 moves up and down the propulsion force receiving member 37 by the rotation of the crank 34, the wire 31 connected to the propulsive force receiving member 37 moves up and down to open and close the drain plug 19 at the other end. . In other words, in the drainage device 30, the manual switch 33 provided on the upper surface of the edge of the bathtub 16 is a knock cam 38. Then, as the knock cam 38 moves up and down, the drain plug 19 provided on the bottom surface of the bathtub 16 is moved up and down in the vertical direction by the wire 31 having rigidity in the linear direction, thereby opening and closing the drain plug 19.

  The manual switch 33 is a direct operation unit and is displaced over an open position where the drain plug 19 is in an open state and a closed position where the drain plug 19 is in a closed state. When the manual switch 33 is displaced up and down and is positioned above, the drain plug 19 is closed, and when the manual switch 33 is positioned below, the drain plug 19 is open. Therefore, the user can open and close the drain plug 19 by pressing the manual switch 33.

  As shown in FIGS. 6 and 7, the manual switch 33 is connected to the manual thrust transmission member 36. The manual propulsion force transmission member 36 is a direct conversion unit that converts a force by which the manual switch 33 is displaced into a force for opening and closing the drain plug 19. The manual propulsive force transmission member 36 is connected to a propulsive force receiving member 37 located below. The manual propulsion force transmission member 36 has a C-shaped cross section and houses a crank 34 and a connecting rod 35 therein. Therefore, the manual propulsion force transmission member 36 has a configuration that avoids the connecting rod 35 connected to the crank 34.

  The motor 39 is a drive unit that is controlled by the control unit 20 and rotationally drives the crank 34 in accordance with an operation of a remote operation unit such as the kitchen remote control 42. The motor 39 rotationally drives a crank 34 that is a rotating portion around a predetermined rotation axis. The rotation shaft is fixed to the case 32. The connecting rod 35 is a remote power converter that is connected to the crank 34 and converts the rotational motion of the crank 34 into a reciprocating motion and converts it into a force for opening and closing the drain plug 19. One end of the connecting rod 35 is connected to a position shifted from the rotation axis of the crank 34 in the radial direction, that is, an eccentric position. The other end of the connecting rod 35 is connected to the propulsive force receiving member 37. As a result, when the motor 39 rotates the crank 34, one end of the connecting rod 35 rotates and the propulsive force receiving member 37 moves up and down.

  The propulsion force receiving member 37 is an opening / closing part that is mechanically connected to the drain plug 19 and opens and closes the drain plug 19 using the force converted by the manual propulsion force transmission member 36 and the connecting rod 35. The propulsive force receiving member 37 is connected to the drain plug 19 and the wire 31 via a knock cam 38.

  Although not shown, the knock cam 38 is a mechanism employed in a ballpoint pen or the like, and reciprocates between an upper position and a lower position each time it is pressed downward. Therefore, the knock cam 38 is a mechanism that holds the current position until it is pressed downward. When the knock cam 38 is positioned below, the wire 31 connected to the drain plug 19 is pressed and displaced upward from the bottom surface of the bathtub 16 to be in an open state. When the knock cam 38 is positioned above, the drain plug 19 is pulled to the bottom surface of the bathtub 16 by the wire 31 and is closed.

  Accordingly, when the crank 34 is rotated once by the motor 39, the connecting rod 35 connected to the crank 34 pushes down the propulsion force receiving member 37, and the knock cam 38 under the connecting force 35 is operated. The wire 31 connected to the knock cam 38 is moved up and down, and the drain plug 19 connected to the other end of the wire 31 is moved up and down to open and close the drain plug 19.

  Next, the operation of the drainage device 30 will be described with reference to FIGS. FIGS. 8-12 has shown the displacement of each part in the case of making the drain plug 19 into an open state from a closed state by remote operation. When the crank 34 shown in FIG. 7 is at 0 degree and the manual switch 33 is in the upper position (closed position), when the crank 34 is rotated 90 degrees clockwise by the motor 39 (see FIG. 8), The propulsive force receiving member 37 is displaced downward by the connecting rod 35. Further, since the thrust receiving member 37 is displaced downward, the manual thrust transmitting member 36 and the manual switch 33 connected to the thrust receiving member 37 are displaced downward. When the crank 34 is further rotated and disposed at a position of 180 degrees (see FIG. 9), the propulsive force receiving member 37 is further displaced downward, and the knock cam 38 is pushed down to be in the open state. The manual switch 33 is also located at the lower position (open position). Further, even if the crank 34 rotates and returns to the position of 270 degrees (see FIG. 10) and 0 degree again (see FIG. 11), the thrust receiving member 37 is displaced upward with the displacement of the connecting rod 35. . However, since the knock cam 38 remains positioned below, the drain plug 19 remains open. Therefore, the crank 34 rotates once when the drain plug 19 changes from the open state to the closed state, and rotates once when the drain plug 19 changes from the closed state to the open state. In other words, the crank 34 applies a force for switching the open / close state of the drain plug 19 to the connecting rod 35 every rotation.

  When the manual switch 33 is pressed in this state, the manual switch 33 can be pressed as shown in FIGS. 11 and 12, and the manual propulsive force transmission member 36 is displaced downward by pressing the manual switch 33. Then, the propulsive force receiving member 37 is displaced downward, and the knock cam 38 is also pressed, so that the open state is closed.

  Here, when the crank 34 is positioned at 50 degrees as shown in FIG. 13, the connecting rod 35 and the manual propulsive force transmission member 36 interfere with each other even if the manual switch 33 is pushed down, and as shown in FIG. In addition, the manual switch 33 cannot be pressed. Therefore, it is necessary to arrange the crank 34 within a predetermined range such as 0 degrees so that the manual switch 33 can be opened and closed. Therefore, the connecting rod 35 has an interference range that prevents the manual switch 33 from being displaced while the crank 34 rotates once.

  In other words, the drainage device 30 includes a manual propulsive force transmission member 36 for avoiding the connecting rod 35 connected to the crank 34. When the manual switch 33 is pressed, the manual propulsion force transmission member 36 pushes down the propulsion force receiving member 37 and operates the knock cam 38, whereby the drain plug 19 can be manually opened and closed. However, manual operation by the manual switch 33 is possible only when the crank 34 is stopped in a manually operable range (the crank 34 is −10 degrees to 10 degrees).

  Next, the upper sensor 61 and the open sensor 62 provided in the drainage device 30 will be described with reference to FIG. The open sensor 62 is a first detection unit that detects the position of the manual switch 33. Specifically, the open sensor 62 detects the position of the propulsion force receiving member 37 as shown in FIG. The thrust receiving member 37 is provided with a magnet. When the thrust receiving member 37 is moved downward (open position of the manual switch 33) by the reed switch, the open sensor 62 is turned on. When the open sensor 62 is on, the drain plug 19 is in an open state. When the open sensor 62 is off, the drain plug 19 is in a closed state.

  The upper sensor 61 is a second detection unit that detects the angular position of the crank 34. Specifically, the upper sensor 61 detects the angular position of the crank 34 as shown in FIG. The crank 34 is provided with a magnet in a part in the circumferential direction, and is turned on when the crank 34 is brought into a predetermined range around 0 degrees by a reed switch fixed to the case 32. Therefore, the upper sensor 61 detects whether or not the predetermined position of the crank 34 is within a detection range equal to or smaller than a predetermined angle.

  Next, the control of the control unit 20 will be described. The control unit 20 reads and executes various setting information and predetermined programs stored in advance in a built-in storage unit (ROM, RAM, etc.). The process shown in FIG. 16 is executed when the hot water supply apparatus 10 is powered on. In step S161, it is determined whether the automatic bath switch 45 is operated from a kitchen switch or the like, or whether it is a predetermined time before the hot water reservation time. If the bath automatic switch 45 has been operated or is a predetermined time before the reserved time, the process proceeds to step S162, and the process of step S161 is repeated until the condition is satisfied.

  In step S162, the presence / absence of the drainage device 30 is determined. If the drainage device 30 is present, the process proceeds to step S163. If the drainage device 30 is not present, the process proceeds to step S165. The presence or absence of the drainage device 30 can be determined based on whether or not an error has occurred, for example, when a signal is output from the control unit 20 to the drainage device 30. The presence / absence of the drainage device 30 can also be determined by checking the setting of each remote controller and the model setting.

  In step S163, since there is the drainage device 30, it is determined whether or not an error has occurred in the drainage device 30. If there is an error, the process proceeds to step S165, and if there is no error, the process proceeds to step S164. The error of the drainage device 30 is, for example, an abnormality of the upper sensor 61 and an abnormality of the open sensor 62.

  In step S164, since there is no error in the drainage device 30, the drainage device 30 is controlled so that the drain plug 19 is closed, and the process proceeds to step S165. In step S165, assuming that the drainage device 30 is in the closed state, bathing of the bath is started and this flow is ended.

  As described above, the control unit 20 controls the hot water supply device 10 for supplying hot water to the bathtub 16, and when an operation for supplying hot water to the bathtub 16 is performed by the bath automatic switch 45, the hot water supply device 10 is supplied. And the drain plug 19 is controlled to be closed.

  Next, the opening control of the drain plug 19 by the control unit 20 will be described. The process shown in FIG. 17 is executed when the hot water supply apparatus 10 is powered on. In step S171, it is determined whether or not the drain plug 19 has been opened by remote control. If the drain plug 19 has been opened, the process proceeds to step S172, and the process of step S171 is repeated until the opening operation is performed.

  In step S172, the presence / absence of the drainage device 30 is determined. If the drainage device 30 is present, the process proceeds to step S173. If the drainage device 30 is not present, the present flow is terminated. In step S173, since there is the drainage device 30, it is determined whether or not an error has occurred in the drainage device 30, and if there is an error, this flow is terminated, and if there is no error, the flow proceeds to step S174. In step S174, since there is no error in the drainage device 30, the drainage device 30 is controlled so that the drain plug 19 is opened, and this flow ends.

  Next, the closing control of the drain plug 19 by the control unit 20 will be described. The process shown in FIG. 18 is executed when the hot water supply apparatus 10 is powered on. In step S181, it is determined whether or not the drain plug 19 has been closed by remote operation. If the drain plug 19 has been closed, the process proceeds to step S182, and the process of step S181 is repeated until the closing operation is performed.

  In step S182, the presence / absence of the drainage device 30 is determined. If there is a drainage device 30, the process proceeds to step S183, and if there is no drainage device 30, this flow ends. In step S183, since there is the drainage device 30, it is determined whether or not an error has occurred in the drainage device 30, and if there is an error, this flow is terminated, and if there is no error, the flow proceeds to step S184. In step S184, since there is no error in the drainage device 30, the drainage device 30 is controlled so that the drain plug 19 is closed, and this flow is finished.

  Next, initial control of the drainage device 30 by the control unit 20 will be described with reference to FIG. The initial control is a process for calculating the rotation time of the crank 34 for arranging the crank 34 within a range where manual operation is possible and further arranging the crank 34 at a position where manual operation is possible. The initial control is started (1) when the drainage device 30 is started after a predetermined period of time has elapsed, (2) when the information in the storage unit is reset, and (3) after the stoppage due to an abnormality of the drainage device 30 It is executed when it is done. In the case of (1), it includes the time when the power is turned on for the first time (power is turned on after no backup) and the time when the power is restored during a power failure during the motor drive and less than 10 seconds. In the case of (2), the microcomputer reset time is included.

  In step S191, the upper sensor ON time is set to the initial value 0, and the process proceeds to step S192. In step S192, the motor 39 is turned on and the process proceeds to step S193. In step S193, it is determined whether or not the upper sensor = ON and the open sensor = OFF. The process in step S193 is repeated until the upper sensor = ON and the open sensor = OFF. When the condition in step S193 is satisfied, The process moves to S194.

  In step S194, it is determined whether or not the upper sensor = OFF and the open sensor = OFF. The process in step S194 is repeated until the upper sensor = OFF and the open sensor = OFF. When the condition in step S194 is satisfied, step S194 is performed. The process moves to S195.

  In step S195, it is determined whether or not the upper sensor = OFF and the open sensor = ON. The process in step S195 is repeated until the upper sensor = OFF and the open sensor = ON. If the condition in step S195 is satisfied, step S195 is performed. The process moves to S196.

  In step S196, it is determined whether or not the upper sensor = ON and the open sensor = ON. The process in step S196 is repeated until the upper sensor = ON and the open sensor = ON. When the condition in step S196 is satisfied, The process moves to S197.

  In step S197, the measurement of the upper sensor ON time is started, and the process proceeds to step S198. In step S198, it is determined whether or not the upper sensor = OFF and the open sensor = ON. The process of step S198 is repeated until the upper sensor = OFF and the open sensor = ON. The process moves to S199. In step S199, the measurement of the upper sensor ON time is stopped, and the process proceeds to step S1910. In step S1910, half of the upper sensor ON time obtained in step S199 is calculated, and the process proceeds to step S1911.

  In step S1911, it is determined whether the upper sensor = OFF and the open sensor = OFF. The process in step S1911 is repeated until the upper sensor = OFF and the open sensor = OFF. The process moves to S1912.

  In step S1912, it is determined whether or not the upper sensor = ON and the open sensor = OFF. The process in step S1912 is repeated until the upper sensor = ON and the open sensor = OFF. When the condition in step S1912 is satisfied, The process moves to S1913.

  In step S1913, after moving to step S1913, it is determined whether or not the learning value of the upper sensor ON half time stored in the storage unit has elapsed, and when it has elapsed, the process proceeds to step S1914. In step S1914, the motor 39 is turned OFF and the process proceeds to step S1915.

  In step S1915, the latest learning value is calculated from the latest upper sensor ON half time obtained in step S1910 and the learning value stored in the storage unit, and is stored in the storage unit (EEPROM). Move. In the storage unit, for example, a plurality of upper sensor ON half-hours are stored in association with the measured time, and the average value of the plurality of upper sensor ON half-hours stored in the storage unit is the latest upper sensor ON half Let it be the learning value of time. As a learning method, for example, an arithmetic average of the past 10 data may be calculated and updated for each learning value. However, when the number of stored data is less than 10, the arithmetic average of the stored data may be used. If the updated learning value is different from the previous value, the learning value is stored in the EEPROM. If the learning has been completed, the learning value stored in the EEPROM may be expanded to the data area for the past 10 times when the power is turned on without backup and the microcomputer is reset.

  In step S1916, the upper sensor failure counter = 0 and the open sensor failure counter = 0 are set, and the process proceeds to step S1917. In step S1917, the next learning enable flag is set to ON, and this flow ends.

  Next, the initial control will be described with reference to the timing charts of FIGS. FIG. 20 shows a case where a minimum rotation (two rotations) is performed during initial control. FIG. 21 shows a case where the maximum rotation (four rotations) is performed during the initial control.

  First, FIG. 20 will be described. Since the upper sensor = ON and the open sensor = OFF at the initial position at time t1, the condition of step S193 is satisfied. As the crank 34 rotates, the on / off state of each sensor changes. At time t2, the upper sensor = OFF and the open sensor = OFF, and the condition of step S194 is satisfied. Next, at time t3, the upper sensor = OFF and the open sensor = ON, and the condition of step S195 is satisfied. Next, at time t4, the upper sensor = ON and the open sensor = ON, and the condition of step S196 is satisfied.

  Then, the upper sensor ON time is measured from time t4, and when the upper sensor = OFF and the open sensor = ON at time t5, the measurement ends (step S199). Next, at time t6, the upper sensor = OFF and the open sensor = OFF, and the condition of step S1911 is satisfied. Next, at time t7, the upper sensor = ON and the open sensor = OFF, and the condition of step S1912 is satisfied.

  Next, at time t8, the upper sensor ON half time has elapsed (step S1913), and the motor 39 is stopped (step S1914). Therefore, after the initial control, as at time t8, the half of the upper sensor ON time has elapsed, that is, the crank 34 is located at the 0 degree position, and the open sensor 62 is also OFF. In the closed position.

  As described above, in the initial control shown in FIG. 20, by rotating twice, the upper sensor ON half time is calculated, and the latest upper sensor ON half time is stored in the storage unit. Thus, by measuring the edge of the upper sensor ON → OFF from the upper sensor OFF → ON by rotating the motor 39 twice, the time for the motor 39 to pass through the upper sensor ON range can be accurately measured. The upper sensor 61 is designed so that the center of the ON range is at the center of the manually operable range = the top dead center of the crank 34. Therefore, the crank 34 can be stopped at the center of the manually operable range = the top dead center of the crank 34 by stopping the motor 39 after the upper sensor ON half-hour has elapsed after detecting the edge of the upper sensor OFF → ON.

  Next, the timing chart of FIG. 21 will be described. In FIG. 21, time t1 to time t8 correspond to time t1 to time t8 in FIG. Since the upper sensor = OFF and the open sensor = OFF at the initial position at time t0, the crank 39 rotates twice by the motor 39 until time t1 that satisfies the condition of step S193. When time t1 is reached and the condition of step S193 is satisfied, the upper sensor ON time is measured while the crank 34 rotates twice by the same processing as in FIG. 20, and then the crank 34 is set to the 0 degree position. The open sensor 62 is also arranged at the OFF position.

  Next, the opening control of the drain plug 19 in FIG. 17 will be further described. The opening control shown in FIG. 22 is started when the process proceeds to step S174 in FIG. In step S221, it is determined whether or not the drain plug 19 is in an open state. If the drain plug 19 is in the open state, the process proceeds to step S222. Exit. The case of the open state is a case where the upper sensor = ON and the open sensor = ON.

  In step S222, the upper sensor ON half time is set to the initial value 0, and the process proceeds to step S223. In step S223, it is determined whether or not the drain plug 19 is in the closed state. If the drain plug 19 is in the closed state, the process proceeds to step S224, and if not, the process proceeds to step S225. The case of the closed state is a case where the upper sensor = ON and the open sensor = OFF.

  In step S224, the learnable flag is set to ON, and the process proceeds to step S226. In step S225, it is not in the open state, but the upper sensor is not ON and the open sensor is not OFF. Therefore, it is determined that learning is impossible, the learning flag is set to OFF, and the process proceeds to step S226.

  In step S226, the motor 39 is driven and the process proceeds to step S227. In step S227, the upper sensor ON half-time measurement is started, and the process proceeds to step S228. In step S228, it is determined whether or not the upper sensor = OFF and the open sensor = OFF, and the process of step S228 is repeated until the upper sensor = OFF and the open sensor = OFF. When the condition of step S228 is satisfied, The process moves to S229. In step S229, the upper sensor ON half-time measurement is finished, and the process proceeds to step S2210.

  In step S2210, it is determined whether or not the upper sensor = OFF and the open sensor = ON. The process of step S2210 is repeated until the upper sensor = OFF and the open sensor = ON. When the condition of step S2210 is satisfied, The process moves to S2211.

  In step S2211, it is determined whether or not the upper sensor = ON and the open sensor = ON. The process in step S2211 is repeated until the upper sensor = ON and the open sensor = ON. When the condition in step S2211 is satisfied, The process moves to S2212.

  In step S2212, it is determined whether or not the learning value of the upper sensor ON half time stored in the storage unit has elapsed since moving to step S2212, and when it has elapsed, the process proceeds to step S2213. In step S2213, the motor 39 is turned off and the process proceeds to step S2214.

  In step S2214, it is determined whether or not the learnable flag = ON and the next learnable flag = ON. If the learnable flag = ON and the next learnable flag = ON, the process proceeds to step S2215. The process moves to step S2216.

  In step S2215, since both of the learnable flags are ON, the latest learning value is calculated based on the upper sensor ON half time measured in step S229 and the learning value stored in the storage unit, and the storage unit (EEPROM) ) And the process proceeds to step S2216.

  In step S2216, the upper sensor failure counter = 0 and the open sensor failure counter = 0 are set, and the process proceeds to step S2217. In step S2217, the next learning enable flag is turned ON, and this flow is ended.

  Next, the closing control of the drain plug 19 in FIG. 18 will be further described. The closing control shown in FIG. 23 is started when the process proceeds to step S184 in FIG. In step S231, it is determined whether or not the drain plug 19 is in a closed state. If the drain plug 19 is in the closed state, the process proceeds to step S232. Exit. The case of the closed state is a case where the upper sensor = ON and the open sensor = OFF.

  In step S232, the upper sensor ON half time is set to the initial value 0, and the process proceeds to step S233. In step S233, it is determined whether or not the drain plug 19 is in the open state. If the drain plug 19 is in the open state, the process proceeds to step S234, and if not, the process proceeds to step S235. The case of the open state is a case where the upper sensor = ON and the open sensor = ON.

  In step S234, the learnable flag is set to ON, and the process proceeds to step S236. In step S235, although it is not in the closed state, neither the upper sensor = ON nor the open sensor = ON, so it is determined that learning is impossible, the learning flag is set to OFF, and the process proceeds to step S236.

  In step S236, the motor 39 is driven and the process proceeds to step S237. In step S237, the upper sensor ON half-time measurement is started, and the process proceeds to step S238. In step S238, it is determined whether or not the upper sensor = OFF and the open sensor = ON. The process in step S238 is repeated until the upper sensor = OFF and the open sensor = ON. When the condition in step S238 is satisfied, The process moves to S239. In step S239, the upper sensor ON half-time measurement is finished, and the process proceeds to step S2310.

  In step S2310, it is determined whether or not the upper sensor = OFF and the open sensor = OFF. The process in step S2310 is repeated until the upper sensor = OFF and the open sensor = OFF. When the condition in step S2310 is satisfied, step S2310 is performed. The process moves to S2311.

  In step S2311, it is determined whether or not the upper sensor is ON and the open sensor is OFF. The process in step S2311 is repeated until the upper sensor is ON and the open sensor is OFF. The process moves to S2312.

  In step S2312, it is determined whether or not the learning value of the upper sensor ON half time stored in the storage unit has elapsed since moving to step S2312, and when it has elapsed, the process proceeds to step S2313. In step S2313, the motor 39 is turned OFF and the process proceeds to step S2314.

  In step S2314, it is determined whether the learnable flag = ON and the next learnable flag = ON. If the learnable flag = ON and the next learnable flag = ON, the process proceeds to step S2315. The process moves to step S2316.

  In step S2315, since both of the learnable flags are ON, the latest learning value is calculated from the upper sensor ON half time measured in step S239 and the learning value stored in the storage unit, and the storage unit (EEPROM) ) And the process proceeds to step S2316.

  In step S2316, the upper sensor failure counter = 0 and the open sensor failure counter = 0 are set, and the process proceeds to step S2317. In step S2317, the next learning enable flag is set to ON, and this flow ends.

  Next, opening control and closing control will be described with reference to the timing chart of FIG. First, the opening control will be described. Since the upper sensor = ON and the open sensor = OFF at the initial position at time t11, the condition of step S223 is satisfied. In step S226, as the motor 39 is turned on and the crank 34 rotates, the on / off state of each sensor changes. At time t12, the upper sensor = OFF and the open sensor = OFF, and the condition of step S228 is satisfied. Accordingly, in step S229, the upper sensor ON half time TM1 is measured.

  Next, at time t13, the upper sensor = OFF and the open sensor = ON, and the condition of step S2210 is satisfied. Next, at time t14, the upper sensor = ON and the open sensor = ON, and the condition of step S2211 is satisfied.

  Next, at time t15, the upper sensor ON half time has elapsed (step S2212), and the motor 39 is stopped (step S2213). As a result, the drain plug 19 is opened. At the open position, as shown at time t15, the half of the upper sensor ON time has elapsed, that is, the crank 34 is located at the 0 degree position, and the open sensor 62 is also ON. Is also in the open position. Therefore, the manual switch 33 is positioned within a manually operable range.

  Next, the closing control will be described. Since the upper sensor = ON and the open sensor = ON at the initial position at time t15, the condition of step S233 is satisfied. In step S236, as the motor 39 is turned on and the crank 34 rotates, the on / off state of each sensor changes. At time t16, the upper sensor = OFF and the open sensor = ON, and the condition of step S238 is satisfied. Accordingly, in step S239, the upper sensor ON half time TM1 is measured.

  Next, at time t17, the upper sensor = OFF and the open sensor = OFF, and the condition of step S2310 is satisfied. Next, at time t18, the upper sensor = ON and the open sensor = OFF, and the condition of step S2311 is satisfied.

  Next, at time t19, the upper sensor ON half time elapses (step S2312), and the motor 39 is stopped (step S2313). As a result, the drain plug 19 is closed. In the closed position, as at time t19, the half of the upper sensor ON time has elapsed, that is, the crank 34 is located at the 0 degree position, and the open sensor 62 is also OFF. Is also in the closed position. Therefore, the manual switch 33 is positioned within a manually operable range.

  As described above, in the drainage device 30 of the present embodiment, the user can open and close the drain plug 19 by directly operating the manual switch 33, and the drain plug 19 can also be operated by operating the kitchen remote control 42 and the smartphone 43. Can be opened and closed. When the remote opening / closing operation is performed, the control unit 20 controls the rotational drive of the motor 39 to complete the opening / closing, and then detects the position of the manual switch 33 detected by the open sensor 62 and the upper sensor 61. The motor 39 is further rotationally driven in accordance with the angular position of the crank 34 thus made. Therefore, the control unit 20 does not stop the rotation when the opening / closing operation is completed, but controls the crank 34 to further rotate until it reaches a position excluding the interference range that is not affected by the manual switch 33. As a result, even after the opening / closing operation is performed by remote operation, the manual switch 33 can be directly operated.

  In the drainage device 30 described in Patent Document 1, the manual operation has a problem that the manual operation unit and the crankshaft interfere with each other unless the crankshaft returns to around 0 °, and the manual operation cannot be performed. Although the method of returning the crankshaft to around 0 ° is not disclosed in Patent Document 1, the motor is stopped by detecting the 0 ° position using a magnet attached to the crankshaft and a reed switch attached to the case. The structure to be made can be considered. However, due to variations in the performance of the magnet and the reed switch, variations in their attachment, and deterioration in performance over time, the detected value may change and the crankshaft cannot be stopped at the 0 ° position.

  On the other hand, in this embodiment, the time during which the motor 39 passes through the detection range of the upper sensor 61 is learned. As a result, even if the detection value changes due to variations in performance of the upper sensor 61, variations in their attachment, or deterioration in performance over time, the crank 34 can be stopped at around 0 degrees without change. The rotational speed of the crank 34 varies depending on a change in water pressure applied to the drain plug 19 due to the amount of remaining hot water in the bathtub 16 and variations in current and voltage supplied from the control unit 20 to the motor 39. Even if the instruction value from the control unit 20 is the same, the current value and the voltage value vary depending on the difference in the length of the wiring from the control unit 20 to the drainage device 30 and the operating condition of the load of the hot water supply device 10 operating simultaneously. Therefore, robustness is improved by learning and storing an average value of values acquired a plurality of times. Further, by storing the data in the internal memory or the nonvolatile memory as a storage unit, the stored value is not forgotten even if there is an unexpected power failure.

  Furthermore, in this embodiment, when the crank 34 makes one rotation, the storage unit stores in advance a stop time until the upper sensor 61 is turned on (within the detection range) to a position excluding the interference range. ing. The stop time is the upper sensor ON half time in this embodiment. When the opening / closing operation is performed by remote operation, the control unit 20 controls the rotational drive of the motor 39 to complete the opening / closing by remote operation, and then the manual switch 33 is placed in the closed position or the open position by the open sensor 62. It is detected that Thereafter, the motor 39 is further rotated after being placed in the closed position or the open position, and is rotated until it falls within the detection range, and is further rotated from the position within the detection range for half an upper sensor ON half time. Thus, the motor 39 is controlled so that the crank 34 is located at a position excluding the interference range. As a result, the manual switch 33 can be reliably disposed within the operable range.

  In the present embodiment, the control unit 20 functions as a measurement unit that measures the detection time within the detection range by the upper sensor 61. At least the angular position (0 degree) of the crank 34 in the center of the detection range is a position excluding the interference range, and the stop time stored in the storage unit is a half value of the detection time (upper sensor ON half). Time). As a result, the crank 34 can be reliably arranged around 0 degrees.

  Furthermore, in this embodiment, when the drainage device 30 is activated, the control unit 20 controls the crank 34 to rotate a plurality of times by the motor 39, and the detection measured by the control unit 20 when the crank 34 is rotated a plurality of times. Half the time is stored in the storage unit as the latest stop time. By performing initial control when the drainage device 30 is activated, the latest upper sensor ON half time can be acquired. As a result, the crank 34 can be arranged with high accuracy in the vicinity of 0 degrees.

  Further, in this embodiment, when the opening / closing operation is performed by remote control, the control unit 20 performs the upper sensor ON half time (start time) from when the crank 34 is rotationally driven by the motor 39 until it is out of the detection range. Measure. The stop time stored in the storage unit is a start time. Therefore, the latest upper sensor ON half time can be acquired each time the opening / closing operation is performed. As a result, the crank 34 can be arranged with high accuracy in the vicinity of 0 degrees. In addition, since the rotation speed of the motor 39 varies depending on variations in the voltage supplied from the control unit 20 and the presence / absence of hot water in the bathtub 16, the robustness can be improved by re-measurement during normal use other than the initial control. Can do.

  As described above, in this embodiment, the drainage device 30 that can electrically open and close the drain plug 19 of the bathtub 16 can be controlled from the control unit 20 of the hot water supply device 10, thereby improving the convenience of the user of the smart house or the HEMS system. Is significantly improved. Specifically, when the hot water filling is performed from the outside with the smartphone 43 or the like, the hot water filling is started after the drain plug 19 of the bathtub 16 is automatically closed by the drainage device 30 provided in the bathtub 16. . Therefore, it is not necessary to close the drain plug 19 of the bathtub 16 before going out. Moreover, even if the drain plug 19 of the bathtub 16 is forgotten to be closed, the hot water is automatically filled after the drain plug 19 of the bathtub 16 is closed, so that the hot water is not wasted and energy saving is improved. In addition, the open / closed state of the drain plug 19 can be known from the information such as the upper sensor 61 and the closing sensor provided in the drainage device 30 by the smartphone 43 or the like even when going outside. Further, by returning the crank 34 to the 0 ° position, the manual switch 33 at the top of the drainage device 30 returns to the uppermost position, so that there is no gap in the switch portion and the appearance can be improved.

  Moreover, in this embodiment, it can operate remotely with the smart phone 43 which can cooperate with the remote apparatus of the hot-water supply apparatus 10, the display apparatus of a HEMS system, or a HEMS system with a network server. When remote control (water filling or automatic bathing) is performed, the hot water filling is performed after the drain plug 19 is switched from open to closed before the hot water filling. Alternatively, when a predetermined drain plug 19 is opened (or closed), the drain plug 19 can be switched from closed to open (or open to closed). Further, the open / closed state of the drain plug 19 can be notified to an information terminal device such as a smartphone 43 that can be linked with a remote device of the hot water supply device 10, a display device of the HEMS system, or a network server with the HEMS system by animation, characters or LEDs. it can.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. The present embodiment is characterized in that the control unit 20 is connected to a network. As shown in FIG. 25, the control unit 20 of the hot water supply apparatus 10 </ b> A and the router 51 are connected by a wiring 52. The control unit 20
Built-in circuit (registered trademark) and LAN port. This makes it possible to use the kitchen remote controller 42 and the bathroom remote controller 41 that are not network-compatible. Therefore, the cost of the kitchen remote control 42 and the bathroom remote control 41 can be suppressed. Further, since the drainage device 30 can be directly controlled from the control unit 20 without using the kitchen remote controller 42, the response can be improved.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. The present embodiment is characterized in that the control unit 20 is connected to the network via the expansion board 70. As shown in FIG. 26, the extension board 70 and the router 51 are connected by a wiring 71. The expansion board 70 incorporates an Ethernet circuit (registered trademark) and a LAN port. The control unit 20 is connected to the expansion board 70 by serial communication. Thereby, the manufacturing cost of the control unit 20 alone can be suppressed. Moreover, the kitchen remote controller 42 and the bathroom remote controller 41 which are not network-compatible can be used. Therefore, the cost of the kitchen remote control 42 and the bathroom remote control 41 can be suppressed. Further, since the drainage device 30 can be directly controlled from the control unit 20 without using the kitchen remote controller 42, the response can be improved.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG. The present embodiment is characterized in that a home automation system (also referred to as an HA system) is used for cooperation between the hot water storage tank unit 12 and the kitchen remote controller 42. The HA system is a system for organically linking home devices defined by the Japan Electrical Manufacturers' Association standard JEM1427 HA terminal (JEM-A).

  In the present embodiment, the control unit 20 is connected to the kitchen remote controller 42 via a JEM-A communication interface unit (IFU) 75 and an extended ECU 74. The extension ECU 74 and the kitchen remote control 42 are connected to each other by a LAN cable 72 and a power line 73. The extended ECU 74 is connected to the JEM-A communication IFU 75 via the JEM-A communication line 76 instead of the remote control communication line. The JEM-A communication IFU 75 has a function of ensuring consistency of interface conditions between the JEM-A processing unit 77 and the extended ECU 74. The control unit 20 has a JEM-A processing unit 77 built therein. The JEM-A processing unit 77 is connected to the JEM-A communication IFU 75 via the JEM-A communication line 76.

  When the kitchen remote controller 42 is connected to the processing unit 77 for JEM-A via the extended ECU 74 or the like, the drainage device 30 is recognized as an HA device. As a result, a switch for confirming the state of the drain plug 19 that is an HA device, that is, a drain plug switch 47 is displayed on the kitchen remote controller 42. Therefore, the kitchen remote controller 42 is not a dedicated drain plug switch of the kitchen remote controller 42 but the drain device 30 is assigned to the HA connection device and the drain plug switch 47 is operated as the HA device by closing the drain plug ⇒ open (or open ⇒ Closed) can be operated.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  In the first embodiment described above, the thrust receiving member 37 and the wire 31 are mechanically connected via the knock cam 38, but the thrust receiving member 37 directly moves the wire 31 up and down without the knock cam 38. May be.

  In the first embodiment described above, the manual switch 33 is not limited to the switch to be pressed, and may be any switch that is displaced, such as a rotary lever.

  In the first embodiment described above, the open sensor 62 detects the position of the propulsive force receiving member 37. However, the open sensor 62 may detect the position of the manual propulsive force transmitting member 36, and may detect the position of the manual switch 33. May be.

DESCRIPTION OF SYMBOLS 10 ... Hot-water supply apparatus 11 ... Hot-water supply machine 12 ... Hot water storage tank part 16 ... Bathtub 19 ... Drain plug 20 ... Control part (measuring means)
31 ... Wire 32 ... Case 33 ... Manual switch (direct operation part)
34 ... Crank (rotating part) 35 ... Connecting rod (remote power conversion part)
36 ... Manual propulsion force transmission member (direct conversion portion) 37 ... Propulsion force receiving member (opening / closing portion)
38 ... knock cam 39 ... motor (drive unit)
41 ... Bathroom remote control (remote control unit) 42 ... Kitchen remote control (remote control unit)
43 ... Smartphone (remote control unit) 47 ... Drain valve switch 61 ... Upper sensor (second detection means) 62 ... Open sensor (first detection means)

Claims (9)

A direct operation unit (33) for opening and closing a drain plug (19) provided on the bottom surface of the bathtub (16), wherein the drain plug is in an open position and the drain plug is in a closed state. A direct operating part displaced over the position;
A direct conversion unit (36) for converting a force by which the direct operation unit is displaced into a force for opening and closing the drain plug;
A remote control unit (41, 42, 43) for opening and closing the drain plug by remote control;
A rotating portion (34) that is driven to rotate about a predetermined rotation axis;
A drive unit (39) that rotationally drives the rotating unit in response to an operation of the remote control unit;
A remote power conversion unit (35) connected to the rotation unit, which converts the rotary motion of the rotation unit into a reciprocating motion and converts it into a force for opening and closing the drain plug;
An open / close unit (37) mechanically connected to the drain plug and opening and closing the drain plug using the force converted by the direct conversion unit and the remote power conversion unit;
First detection means (62) for detecting the position of the direct operation unit;
Second detection means (61) for detecting the angular position of the rotating part;
A control unit (20) for controlling the drive unit,
The rotating unit gives a force to switch the open / close state of the drain plug to the remote power conversion unit every rotation.
The remote power conversion unit has an interference range that prevents displacement of the direct operation unit while the rotation unit makes one rotation.
When the opening / closing operation is performed by the remote operation unit, the control unit controls the rotational drive of the driving unit to complete the opening / closing by the remote operation, and then the direct detection detected by the first detection unit. The drive unit is further driven to rotate according to the position of the operation unit and the angular position of the rotation unit detected by the second detection unit so that the rotation unit is located at a position excluding the interference range. A drainage device that controls the drive unit. The second detection means detects whether or not the predetermined position of the rotating part is within a detection range of a predetermined angle or less;
When the rotating unit makes one rotation, it further includes a storage unit that stores in advance a stop time from a position within the detection range to a position excluding the interference range,
When the opening / closing operation is performed by the remote operation unit, the control unit controls the rotational drive of the driving unit to complete the opening / closing by the remote operation, and then the first operation unit causes the direct operation unit to be When it is detected that it is arranged at the closed position or the open position, the drive unit is further rotated after being arranged at the closed position or the open position, and rotated until it falls within the detection range, The stop time stored in the storage unit is further rotated from a position within the detection range, and the drive unit is controlled so that the rotation unit is positioned at a position excluding the interference range. The drainage device according to claim 1. A measuring means (20) for measuring a detection time within the detection range by the second detection means;
At least the central angular position of the detection range is a position excluding the interference range,
The drainage device according to claim 2 , wherein the stop time stored in the storage unit is a half value of the detection time.   When the drainage device is activated, the control unit controls the driving unit to rotate the rotating unit a plurality of times, and half of the detection time measured by the measuring unit when the rotating unit is rotated a plurality of times. The drainage device according to claim 3, wherein the value is stored in the storage unit as the latest stop time. When the opening and closing operation is performed by the remote operation unit, the measuring unit measures a start time from when the rotating unit is rotationally driven by the driving unit until it is out of the detection range,
The drainage device according to claim 3 or 4, wherein the stop time stored in the storage unit is the start time. The storage unit stores a plurality of values of the start time and half of the detection time as the stop time in association with the measurement time measured by the measurement unit,
The drainage device according to claim 5, wherein the control unit sets an average value of the plurality of stop times stored in the storage unit as the latest stop time. The control unit further controls a hot water supply device (10) for hot water filling the bathtub,
The control unit controls the hot water supply device to supply hot water and controls the drain plug to be closed when an operation for filling the bathtub with hot water is performed by the remote operation unit. The drainage device according to any one of claims 1 to 6. The control unit includes a transmission unit that transmits information related to the open / close state of the drain plug to the remote control unit by wireless communication,
The remote control unit is
A receiver for receiving information transmitted from the transmitter;
The drainage device according to claim 1, further comprising: an output unit that outputs information received by the receiving unit.   When the control unit is activated after a predetermined time has elapsed since the drainage device stopped, when the information in the storage unit is reset, and when activated after the suspension due to an abnormality of the drainage device, the drive The rotation unit is controlled to rotate a plurality of times by a unit, and half the value of the detection time measured by the measurement means when the rotation unit is rotated a plurality of times is stored in the storage unit as the latest stop time. The drainage device according to claim 3, wherein

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