JP2019208638A - Water discharge device - Google Patents

Abstract

To provide a drainage system that improves maintainability of a water discharge device.SOLUTION: A water discharge device 4 includes: a water sucking port 6 provided to a bathtub 2; a water sucking channel 8 connected to the water sucking port 6; a pump 10 connected to the water sucking channel 8 for sucking bathtub water W from the water sucking port 6; a conduit 12 connected to the pump 10; a water discharge port 14 connected to the conduit 12 for discharging the bathtub water W sucked by the pump 10; a drainage channel 32 connected to the water sucking channel 8 for discharging the bathtub water W; a first selector valve 34 for switching communication states of the pump 10, the water sucking port 6, and the drainage channel 32; and a control device 20 for controlling the first selector valve 34. The control device 20 is configured to execute changeover control to cause the first selector valve 34 to be operated so as to communicate the pump 10 with the drainage channel 32, and cut off the water sucking port 6 and the pump 10 and the drainage channel 32 at a predetermined timing.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water discharge device installed in a bathtub.

  A water discharge device that provides a massage effect by locally discharging water on the waist, neck, shoulder, etc. of a bather is known (see Patent Document 1). The water discharging device sucks in the bathtub water with a pump and circulates the bathtub water by discharging water toward the bather in the bathtub.

JP 2010-75473 A

  Sometimes, the user may leave the bath water in the bathtub for a long time. For example, recent bathtubs can suppress the temperature drop of bathtub water to several degrees C. even after about 8 hours have passed. For this reason, there is a usage mode in which hot water is filled in at night and a bath is taken in the next morning. Moreover, in order to use as washing water, bathtub water may be stored. In addition, bathtub water may be stored for the purpose of storing water during a disaster.

  In the state where the bathtub water is accumulated in the bathtub, the bathtub water enters the inside of the water discharging device. If the state in which the bathtub water is accumulated becomes long, the state in which the inside of the apparatus is in contact with the bathtub water also continues for a long time. In this case, dirt such as scale or biofilm is likely to occur inside the apparatus. In addition, bacteria may be generated in the bath water in the apparatus. On the other hand, cleaning inside the water discharge device is troublesome and not easy. However, if the cleaning is neglected, not only is it unsanitary, but foreign matter may enter the pump. From such a situation, the present inventors have come to recognize that further improvement in maintainability of the water discharging device is desirable.

  This invention is made | formed in view of such a situation, One of the objectives is to provide the technique for improving the maintainability of a water discharging apparatus.

  One embodiment of the present invention is a water discharge device. The water discharge device includes: a water inlet provided in the bathtub; a water suction path connected to the water suction opening; a pump connected to the water suction path; and a water suction path connected to the pump; A water outlet that discharges the bathtub water sucked by the pump, a drain passage that is connected to the water suction path and discharges the bathtub water, a first switching valve that switches a communication state of the pump, the water suction opening, and the drain path, And a control device that controls the one switching valve. The control device is configured to execute switching control for operating the first switching valve so as to connect the pump and the drainage channel and to shut off the water inlet, the pump and the drainage channel at a predetermined timing.

  According to the present invention, the maintainability of the water discharge device can be improved.

It is a block diagram of a bathtub system provided with the water discharging apparatus which concerns on embodiment. It is a perspective view which shows the use condition of a water discharging apparatus. It is an enlarged view of a water inlet and a lower water outlet. FIG. 4A is a configuration diagram of a bathtub system including the water discharging device according to the first modification. FIG. 4B is a configuration diagram of a bathtub system including the water discharging device according to the second modification.

  The present invention will be described below based on preferred embodiments with reference to the drawings. The embodiments do not limit the invention but are exemplifications, and all features and combinations described in the embodiments are not necessarily essential to the invention. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate. In addition, the scale and shape of each part shown in each drawing are set for convenience in order to facilitate the explanation, and are not limitedly interpreted unless otherwise specified. In addition, when terms such as “first” and “second” are used in the present specification or claims, these terms do not represent any order or importance unless otherwise specified, and a certain configuration It is for distinguishing from other configurations. Also, in the drawings, some of the members that are not important for describing the embodiment are omitted.

  Drawing 1 is a lineblock diagram of a bathtub system provided with a discharging apparatus concerning an embodiment. The bathtub system 1 includes a bathtub 2 and a water discharge device 4 installed in the bathtub 2. The water discharge device 4 mainly includes a water intake port 6, a water absorption channel 8, a pump 10, a water conduit 12, a water discharge port 14, a drainage channel 32, a first switching valve 34, and a control device 20. Prepare. In FIG. 1, the control device 20 is depicted as a functional block. These functional blocks are realized by elements and circuits such as a CPU and a memory of a computer as a hardware configuration, and are realized by a computer program or the like as a software configuration. Those skilled in the art will understand that these functional blocks can be realized in various forms by a combination of hardware and software.

  The water inlet 6 is provided on the inner wall surface of the bathtub 2. One end side of the water absorption path 8 is connected to the water inlet 6. A pump 10 is connected to the other end side of the water absorption path 8. The pump 10 is a power source that sucks in the bathtub water W that is hot water or water accumulated in the bathtub 2 and sends it out to the spout 14 side. A known pump can be used as the pump 10. By driving the pump 10, the bathtub water W is sucked from the water inlet 6.

  One end side of the water conduit 12 is connected to the pump 10. A water outlet 14 is connected to the other end side of the water conduit 12. The bathtub water W sucked by the pump 10 is discharged from the water outlet 14 to the bathtub 2 via the water conduit 12. “Discharge” or “water discharge” means simply discharging the bath water W, and does not limit the method of discharging. For example, a water discharge method in which the bathtub water W is dropped in a band shape and a water discharge method such as jet injection or spraying are one type of “discharge” or “water discharge”.

  The water conduit 12 of the present embodiment includes a common water conduit 12a, an upper water conduit 12b, and a lower water conduit 12c. The water outlet 14 includes an upper water outlet 14a and a lower water outlet 14b. The lower water outlet 14b is disposed below the upper water outlet 14a in the vertical direction. Note that “in the vertical direction” means that the positional relationship in the horizontal direction does not matter, and the upper water outlet 14a and the lower water outlet 14b may overlap or be shifted in the horizontal direction. One end of the common water conduit 12 a is connected to the pump 10. The upper water conduit 12b branches from the other end side of the common water conduit 12a and is connected to the upper water outlet 14a. The lower water conduit 12c branches from the other end side of the common water conduit 12a and is connected to the lower water outlet 14b.

  FIG. 2 is a perspective view showing a usage state of the water discharge device 4. FIG. 3 is an enlarged view of the water inlet 6 and the lower water outlet 14b. The upper water discharge port 14 a is installed in the flange portion 22 of the bathtub 2. The flange portion 22 is the upper surface of the edge of the bathtub 2. Therefore, the upper water outlet 14a is not immersed in the bathtub water W in the bathtub 2 in principle. The upper water discharge port 14a has a horizontally long and flat shape, and discharges a film-like horizontally long water discharge flow forward. By applying the band-like water discharged from the upper water discharge port 14a to the shoulder and neck of the bather, it is possible to give the bather a relaxing feeling similar to that of hot water.

  The water inlet 6 and the lower water outlet 14 b are installed on the inner wall surface of the bathtub 2. Therefore, the lower spout 14 b can be immersed in the bathtub water W in the bathtub 2. In the present embodiment, the water inlet 6 and the lower water outlet 14 b are provided in a single cover 24. The cover 24 has a flat cylindrical shape, the water suction port 6 is provided on the side surface of the cover 24, and the lower water discharge port 14 b is provided on the front surface of the cover 24. The lower spout 14b sprays the bath water W vigorously toward the bather's waist and back. Thereby, a massage effect can be given to a bather. In addition, air may be taken in from the outside, and this air and the bathtub water W flowing through the lower conduit 12c may be mixed and sprayed from the lower spout 14b.

  As shown in FIG. 1, a drainage channel 32 is connected in the middle of the water absorption channel 8. The drainage channel 32 is a pipe for discharging the bathtub water W in the water discharger 4. “In the water discharge device” means a portion where the bathtub water W flows in the pipes such as the water absorption path 8 and the water guide path 12 and in the pump 10, the first switching valve 34, and the second switching valve 36. The drainage channel 32 has one end connected to the water absorption channel 8 and the other end connected to a drain port (not shown). The drainage channel 32 and the water absorption channel 8 are connected via a first switching valve 34. The first switching valve 34 is a valve that switches the communication state of the pump 10, the water inlet 6, and the drainage channel 32. As the first switching valve 34, a known valve such as a three-way valve can be used. The switching of the communication state between the three parties will be described in detail later.

  The water discharge device 4 includes a second switching valve 36. The second switching valve 36 of the present embodiment is provided at a branch point from the common conduit 12a to the upper conduit 12b and the lower conduit 12c. That is, the common water conduit 12 a, the upper water conduit 12 b, and the lower water conduit 12 c are connected via the second switching valve 36. As the second switching valve 36, a known valve such as a three-way valve can be used. By controlling the second switching valve 36, the communication state between the common water conduit 12a, the upper water conduit 12b, and the lower water conduit 12c can be switched.

  In the present embodiment, the first switching valve 34 and the second switching valve 36 are controlled by a control signal from the control device 20. The control device 20 also controls driving of the pump 10. The bather can input to the control device 20 by a console or a remote controller (not shown). The control device 20 is connected to an external power line, and includes a valve control unit 20a and a pump control unit 20b. The usage mode of the water discharging apparatus 4 by the user is, for example, as follows.

  For example, when the console accepts a user operation, the console issues an instruction to the valve control unit 20a according to the operation input. The valve control unit 20 a sends a control signal to the second switching valve 36 to operate the second switching valve 36. The valve control unit 20a can also cause the second switching valve 36 to automatically execute predetermined control in accordance with a built-in program. Further, the valve control unit 20a transfers a part of the command from the console to the pump control unit 20b. The pump control unit 20 b controls the pump 10 by sending various control signals to the pump 10. The bather may control the second switching valve 36 manually, that is, not physically, but physically. Further, the pump control unit 20b may control the pump 10 by directly receiving a command from the console without going through the valve control unit 20a.

  The bathtub water W is guided from the water inlet 6 to the common water conduit 12 a via the water suction path 8 and the pump 10. When the bather selects the upper spout 14a, the valve control unit 20a sets the second switching valve 36 in the upwardly open state. In the upper open state, the second switching valve 36 communicates the common water conduit 12a and the upper water conduit 12b and blocks the common water conduit 12a and the lower water conduit 12c. Therefore, the bathtub water W is discharged into the bathtub 2 only from the upper water outlet 14a via the common conduit 12a and the upper conduit 12b.

  When the bather selects the lower spout 14b, the valve control unit 20a sets the second switching valve 36 in the downwardly opened state. In the lower open state, the second switching valve 36 communicates the common water conduit 12a and the lower water conduit 12c and blocks the common water conduit 12a and the upper water conduit 12b. Therefore, the bathtub water W is discharged into the bathtub 2 only from the lower water discharge port 14b via the common conduit 12a and the lower conduit 12c.

  Thus, even when the power of the pump 10 is small by discharging water from only one of the upper water outlet 14a and the lower water outlet 14b without dividing the bathtub water W flowing through the common water conduit 12a. It is possible to easily secure a sufficient water discharge amount. Note that, in both the upper open state and the lower open state, the first switching valve 34 communicates the water inlet 6 and the pump 10 and blocks the drainage channel 32, the water inlet 6 and the pump 10. Thereby, the inflow of the bathtub water W from the water absorption path 8 to the drainage path 32 is prevented.

  Further, the control device 20 is configured to execute switching control described below at a predetermined timing. Preferably, the control device 20 performs switching control while the pump 10 is stopped. If the stop state of the pump 10 and the state of the first switching valve 34 and the second switching valve 36 that have undergone switching control overlap at least temporarily, the requirement of “pump 10 being stopped” is satisfied.

  This switching control is executed in the drainage mode. The drainage mode is a mode in which the bathtub water W that has entered the inside of the water discharge device 4 can be discharged outside the apparatus even when the bathtub water W is accumulated in the bathtub 2. For example, when the user inputs a stop instruction of the pump 10 from the console in the state where the bathtub water W is accumulated in the bathtub 2, the control device 20 executes the drain mode together with the stop of the pump 10. Or if the user inputs the execution instruction of drainage mode from a console in the state where bathtub water W collected in bathtub 2, control device 20 will execute drainage mode. In this case, in the drainage mode, the pump 10 is instructed to stop and the switching control is executed.

  In the switching control, the control device 20 causes the pump 10 and the drainage channel 32 to communicate with each other and operates the first switching valve 34 so as to shut off the water inlet 6, the pump 10, and the drainage channel 32. Moreover, the water discharging apparatus 4 is provided with the vent hole 38 connected to the apparatus exterior. Then, under the control of the control device 20, the second switching valve 36 switches the communication state of the pump 10, the lower water discharge port 14 b, and the ventilation port 38. Specifically, the control device 20 causes the pump 10 and the vent 38 to communicate with each other, and operates the second switching valve 36 so as to shut off the lower water discharge port 14b, the pump 10, and the vent 38.

  As described above, the pump 10, the upper water discharge port 14a, and the lower water discharge port 14b are connected to the second switching valve 36 of the present embodiment through the water conduit 12. The upper water discharge port 14 a is installed in the flange portion 22. For this reason, the upper water outlet 14 a can be used as the vent 38. That is, the upper water discharge port 14a also serves as the vent hole 38. Accordingly, in the switching control, the control device 20 communicates with the pump 10 and the upper water outlet 14a and operates the second switching valve 36 so as to shut off the lower water outlet 14b, the pump 10, and the upper water outlet 14a.

  In the state where the second switching valve 36 shuts off the lower water outlet 14b, the pump 10 and the upper water outlet 14a, and the first switching valve 34 shuts off the water inlet 6, the pump 10 and the drainage channel 32, The bath water W can enter only the first switching valve 34 and the second switching valve 36. Then, the pump 10 and the upper water discharge port 14a are communicated, and the pump 10 and the drainage channel 32 are communicated, whereby the upper water discharge port 14a, the upper water conduit 12b, the second switching valve 36, the common water conduit 12a, the pump 10, the water absorption path 8 (region between the pump 10 and the first switching valve 34) and the bathtub water W remaining in the first switching valve 34 are discharged from the drainage path 32 to the outside of the apparatus. Thereby, most of the water discharger 4 can be brought into a non-contact state with the bath water W.

  In the present embodiment, the first switching valve 34 is located above the water inlet 6 in the vertical direction. That is, the portion where the bathtub water W flows in the first switching valve 34 is located above the portion where the bathtub water W flows in the water inlet 6. Moreover, the lower end B1 of the connection part with the water absorption path 8 (area | region between the 1st switching valve 34 and the water intake port 6) in the 1st switching valve 34 is the lower end B2 of the connection part with the water absorption path 8 in the water intake port 6. It is located above. Accordingly, the water absorption path 8 is inclined downward from the first switching valve 34 toward the water intake 6. Thereby, when the bathtub water W is extracted from the bathtub 2, the bathtub water W in the water absorption path 8 flows down to the bathtub 2 side.

  In the present embodiment, the pump 10 is located above the first switching valve 34 in the vertical direction. That is, the part where the bathtub water W flows in the pump 10 is located above the part where the bathtub water W flows in the first switching valve 34. In addition, the lower end B3 of the connection portion of the pump 10 with the water absorption path 8 is lower than the lower end B4 of the connection portion of the first switching valve 34 with the water absorption path 8 (region between the pump 10 and the first switching valve 34). Located above. Therefore, the water absorption path 8 is inclined downward from the pump 10 toward the first switching valve 34. Thereby, the bathtub water W in the water discharging apparatus 4 flows into the drainage channel 32 smoothly in drainage mode.

  The control device 20 can also execute a cleaning mode described below. For example, in a state where the bathtub water W is accumulated in the bathtub 2, when the user inputs an instruction to execute the cleaning mode from the console, the control device 20 executes the cleaning mode. Or when the user inputs the stop instruction | indication of the pump 10 from a console in the state which the bathtub water W collected in the bathtub 2, the control apparatus 20 performs washing | cleaning mode. The program for the cleaning mode is built in a memory (not shown) of the control device 20 in advance.

  In the cleaning mode, the pump control unit 20b first drives the pump 10 for a predetermined time. Thereby, the bathtub water W circulates in the water discharging apparatus 4. The driving time of the pump 10 can be appropriately set based on experiments and simulations by the designer. For example, it is designed such that a plurality of driving times are set, and the user can appropriately select the driving times according to the degree of cleaning to be obtained, the usage state of the water discharge device 4, and the like.

  After a predetermined time has elapsed, the pump control unit 20b stops the pump 10, and then the valve control unit 20a executes the switching control described above. That is, the intrusion of the bath water W from the water inlet 6 side and the lower water outlet 14 b side is blocked, and a flow path from the upper water outlet 14 a to the drainage channel 32 via the pump 10 is formed, and the water discharge device 4 The remaining bathtub water W is discharged. Thereby, the inside of the water discharging apparatus 4 is maintained in a clean state. For example, the inside of the water discharge device 4 can be kept clean by executing the cleaning mode each time the pump 10 is stopped.

  As described above, the water discharge device 4 according to the present embodiment includes the water suction port 6, the water suction path 8 connected to the water suction port 6, the pump 10 that is connected to the water suction path 8 and sucks the bathtub water W, and the pump 10, a water conduit 12 connected to the water conduit 12, a water discharge port 14 that is connected to the water conduit 12 and discharges the bathtub water W, a drain passage 32 that is connected to the water intake path 8 and discharges the bathtub water W, the pump 10, and the water intake path 8. And a first switching valve 34 that switches the communication state of the drainage channel 32 and a control device 20 that controls the first switching valve 34. And the control apparatus 20 performs the switching control which operates the 1st switching valve 34 so that the pump 10 and the drainage channel 32 may be communicated at a predetermined timing, and the water inlet 6 and the pump 10 and the drainage channel 32 are shut off. To do.

  In this way, the control device 20 performs the switching control, in other words, the drainage mode, so that the bath water W remaining in the water discharge device 4 can be discharged while blocking the intrusion of the bath water W from the bath 2. it can. As a result, it is possible to suppress the occurrence of dirt such as scale and biofilm in the apparatus and the generation of bacteria in the remaining water. Moreover, since the design that the drainage mode is executed by a single button operation of the user is possible, the inside of the water discharge device 4 can be cleaned without forcing the user to perform complicated operations. Therefore, the maintainability of the water discharge device 4 can be improved. Further, the remaining water in the water discharge device 4 is discharged from the drainage channel 32. That is, the remaining water is not discharged to the bathtub 2. For this reason, the bathtub 2 can also be kept clean.

  Moreover, the water discharge port 14 of this Embodiment contains the lower water discharge port 14b installed in the inner wall face of the bathtub 2, and the water discharge device 4 is the ventilation port 38 connected to the apparatus exterior, the pump 10, the lower water discharge port 14b, and And a second switching valve for switching the communication state of the vent hole. In the switching control, the control device 20 controls the first switching valve 34 and communicates the pump 10 and the vent 38 with the second switching valve so as to shut off the lower water discharge port 14b, the pump 10 and the vent 38. 36 is operated. Thereby, even if it is a case where the lower spout 14b is immersed in the bathtub water W, the bathtub water W in the water discharging apparatus 4 is discharged | emitted, preventing the penetration of the bathtub water W to the inside from the 2nd switching valve 36. Can do.

  Furthermore, the water outlet 14 of this Embodiment contains the upper water outlet 14a installed in the flange part 22 of the bathtub 2 in addition to the lower water outlet 14b. Further, the water conduit 12 includes a common water conduit 12a connected to the pump 10, an upper water conduit 12b branched from the common water conduit 12a and connected to the upper water outlet 14a, and a lower portion branched from the common water conduit 12a. And a lower water conduit 12c connected to the water outlet 14b. The second switching valve 36 is provided at a branch point from the common conduit 12a to the upper conduit 12b and the lower conduit 12c. In such a configuration, the upper water discharge port 14 a can also serve as the vent hole 38. Therefore, in the switching control, the control device 20 operates the second switching valve 36 so as to connect the pump 10 and the upper water outlet 14a and to shut off the lower water outlet 14b, the pump 10 and the upper water outlet 14a.

  This provides a bathing method in which the bath water W discharged from the upper spout 14a is applied to the shoulder and neck of the bather and the bath water W discharged from the lower spout 14b is applied to the waist and back of the bather. Can do. In addition, since the upper water discharge port 14a is used as the vent hole 38, it is possible to reduce the complexity of the configuration necessary for the switching control.

  In the present embodiment, the control device 20 executes the switching control while the pump 10 is stopped. Thereby, the bathtub water W in the water discharging apparatus 4 can be drained more smoothly. Further, it is possible to avoid the bathtub water W from flowing backward from the drainage channel 32.

  The first switching valve 34 is located above the water inlet 6 in the vertical direction. Thereby, the water absorption path 8 can be inclined below toward the bathtub 2 side from the water discharging apparatus 4 side. For this reason, when the bathtub water W is extracted from the bathtub 2, the bathtub water W in the water absorption path 8 can be drained to the bathtub 2 side. As a result, the inside of the water discharge device 4 can be kept clean.

  Further, the pump 10 is positioned above the first switching valve 34 in the vertical direction. Thereby, the water absorption path 8 can be inclined downward from the pump 10 toward the first switching valve 34. For this reason, the bathtub water W in the water discharging apparatus 4 can be more smoothly guided to the drainage channel 32. As a result, the possibility that the bathtub water W remains in the water discharging device 4 can be reduced, and the inside of the device can be kept clean.

  The embodiment of the present invention has been described in detail above. The above-described embodiments are merely specific examples for carrying out the present invention. The contents of the embodiments do not limit the technical scope of the present invention, and many design changes such as changes, additions, deletions, and the like of components are made without departing from the spirit of the invention defined in the claims. Is possible. In the above-described embodiment, contents that can be changed in design are emphasized with notations such as “in this embodiment” and “in this embodiment”. Design changes are allowed even if there is no content. Any combination of the above components is also effective as an aspect of the present invention. The hatching attached to the cross section of the drawing does not limit the material of the hatched object.

  In the embodiment, the description has been given of the two lower water outlets 14b and the one upper water outlet 14a (see FIG. 2). Needless to say, the number of the lower water outlets 14b, the upper water outlets 14a, and the water inlets 6 is as follows. Is optional. Moreover, in embodiment, the bathtub water W which flows through the common conduit 12a is discharged from either one of the upper water outlet 14a and the lower water outlet 14b without being diverted, but the bathtub water W is diverted. Water may be discharged simultaneously from the upper water outlet 14a and the lower water outlet 14b. In the embodiment, the water inlet 6 and the lower water outlet 14b are provided in the single cover 24, but the water inlet 6 and the lower water outlet 14b may be arranged separately.

  Furthermore, the water discharge device 4 may include only one of the upper water discharge port 14a and the lower water discharge port 14b. FIG. 4A is a configuration diagram of a bathtub system 1 including the water discharge device 4 according to the first modification. The water discharge device 4 according to the first modification includes only the upper water discharge port 14a. In this case, the possibility that the bath water W enters from the upper water discharge port 14a side is low, and the upper water discharge port 14a can function as the ventilation port 38, so the second switching valve 36 can be omitted.

  FIG. 4B is a configuration diagram of the bathtub system 1 including the water discharging device 4 according to the second modification. The water discharging apparatus 4 which concerns on the modification 2 is provided with only the lower water discharge port 14b. In this case, the water discharge device 4 includes a second switching valve 36 in order to block the intrusion of the bath water W from the lower water discharge port 14 b side. At this time, the second switching valve 36 is constituted by, for example, a three-way valve, the common conduit 12a and the lower conduit 12c are connected to the two connection ports, and the remaining one connection port to which the pipe is not connected functions as the ventilation port 38. .

  Arbitrary combinations of the above-described constituent elements and those obtained by converting the expression of the present invention between methods, apparatuses, systems, etc. are also effective as an aspect of the present invention.

  2 bathtubs, 4 water discharge devices, 6 water intake ports, 8 water intake channels, 10 pumps, 12 water conduits, 12a common water conduits, 12b upper water conduits, 12c lower water conduits, 14 water discharge ports, 14a upper water discharge ports, 14b lower water discharge ports 20 control device, 22 flange part, 32 drainage channel, 34 1st switching valve, 36 2nd switching valve, 38 vent.

Claims (6)

A water inlet provided in the bathtub;
A water absorption path connected to the water inlet;
A pump connected to the water absorption path and sucking bathtub water from the water inlet;
A water conduit connected to the pump;
A water outlet that is connected to the water conduit and discharges the bathtub water sucked by the pump;
A drainage channel connected to the water absorption channel and discharging the bathtub water;
A first switching valve for switching the communication state of the pump, the water inlet and the drainage channel;
A control device for controlling the first switching valve,
The control device performs switching control for operating the first switching valve so as to communicate the pump and the drainage channel at a predetermined timing so as to shut off the water inlet, the pump, and the drainage channel. A water discharge device, characterized in that it is configured as follows. The spout includes a lower spout installed on the inner wall surface of the bathtub,
The water discharge device includes a vent connected to the outside of the device, and a second switching valve that switches a communication state of the pump, the lower water discharge port, and the vent,
In the switching control, the control device communicates the pump and the vent with the control of the first switching valve so as to block the lower water discharge port, the pump and the vent. The water discharging apparatus of Claim 1 which operates. The spout includes the lower spout and an upper spout installed on the flange portion of the bathtub,
The water conduit includes a common water conduit connected to the pump, an upper water conduit branched from the common water conduit and connected to the upper water outlet, and a branch from the common water conduit to the lower water outlet. A lower water conduit connected,
The second switching valve is provided at a branch point from the common conduit to the upper conduit and the lower conduit.
The upper spout also serves as the vent,
3. The control device according to claim 2, wherein in the switching control, the second switching valve is operated so that the pump communicates with the upper water outlet and the lower water outlet, the pump, and the upper water outlet are shut off. The water discharge apparatus of description.   The water discharge device according to any one of claims 1 to 3, wherein the control device executes the switching control while the pump is stopped.   The water discharge device according to any one of claims 1 to 4, wherein the first switching valve is positioned above the water inlet in the vertical direction.   The water discharge device according to any one of claims 1 to 5, wherein the pump is positioned above the first switching valve in a vertical direction.

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