Faucet device

Abstract

To store a faucet body in a concealment member while inhibiting the faucet body from interfering with another member.SOLUTION: A faucet device according to the embodiment includes a plurality of water discharge parts, and a faucet body for supplying hot water to the water discharge parts, stored in the concealment member, the faucet body including a mixing faucet unit capable of mixing hot water and water, and a water discharge switching part for switching a destination for hot water to be discharged thereto, the water discharge switching part being provided above the mixing faucet unit.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The disclosed embodiments relate to a water faucet device. [Background technology]

[0002] BACKGROUND ART Conventionally, a faucet device in which a faucet body is housed in a counter is known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-100427 Summary of the Invention [Problem to be solved by the invention]

[0004] When the faucet body is housed in a concealing member such as a counter, there is a risk that the faucet body may interfere with other members housed in the concealing member.

[0005] One aspect of the embodiment aims to provide a faucet device in which the faucet body is housed in a concealing member while preventing the faucet body from interfering with other members. [Means for solving the problem]

[0006] The faucet device according to one embodiment includes a plurality of water outlets, a faucet body that supplies hot and cold water to the water outlets and is housed in a concealing member. The faucet body includes a mixing faucet unit that can mix hot and cold water, and a water outlet switching unit that switches the destination of the hot and cold water. The water outlet switching unit is located above the mixing faucet unit.

[0007] This allows the faucet device to house the faucet body in the concealing member while preventing it from interfering with other components, for example. Furthermore, workers can easily access the water discharge switching unit when performing maintenance on it. Therefore, the faucet device can improve the maintainability of the water discharge switching unit housed in the concealing member.

[0008] The faucet device also includes a control device that controls the mixer faucet unit and the water discharge switching unit. The control device is located forward of the mixer faucet unit and the water discharge switching unit. The mixer faucet unit and the water discharge switching unit are located so that they at least partially overlap when viewed from above.

[0009] This allows the faucet device to shorten the length of the wiring connecting the mixer faucet unit and the water discharge switching unit to the control device, thereby reducing electrical noise to the control device. Furthermore, even if the control device is located forward of the mixer faucet unit and the water discharge switching unit, the faucet device is configured so that the mixer faucet unit and the water discharge switching unit at least partially overlap in a top view, preventing the faucet device from becoming too long in the front-to-back direction.

[0010] The faucet device also includes an upstream flow path which is a flow path upstream of the water discharge switching unit, a downstream flow path which is a flow path downstream of the water discharge switching unit, a bypass flow path which connects the upstream flow path and the downstream flow path across the mixer faucet unit, an opening / closing operation unit which switches the communication state of the bypass flow path, and a first water drainage operation unit which switches the communication state between a water drain hole formed in the upstream flow path and the outside, and the connection point between the upstream flow path and the bypass flow path and the connection point between the downstream flow path and the bypass flow path are located at a higher position than the water drainage hole.

[0011] This allows the faucet device to drain hot and cold water from the downstream flow path downstream of the water discharge switching unit via the bypass flow path and the upstream flow path.The faucet device can drain hot and cold water from the downstream flow path without passing through the mixer faucet unit.By locating the water discharge switching unit above the mixer faucet unit, the faucet device can easily drain hot and cold water from the downstream flow path, which is the flow path downstream of the water discharge switching unit.

[0012] In addition, all of the bypass flow paths are provided at positions higher than the locations where the drain holes are provided.

[0013] This allows the faucet device to drain hot and cold water without leaving any hot and cold water in the bypass flow path.

[0014] The water discharge switching unit is provided downstream of the mixer faucet unit. The upstream flow path is a water supply path that supplies water to the mixer faucet unit. The opening / closing operation unit can be manually operated.

[0015] As a result, when the bypass flow path is manually set to "open" during a power outage, for example, the faucet device can allow water to flow from the water supply channel through the bypass flow path into the downstream flow path and discharge water from the discharge section.

[0016] The control device also includes an actuator that operates the mixing faucet unit, and a control device that controls the mixing faucet unit and the water discharge switching unit. The control device has a residual water drain mode that drains residual water from the mixing faucet unit by operating the actuator.

[0017] This allows the faucet device to reduce the amount of hot and cold water remaining in the mixer faucet unit by using the residual water drain mode.

[0018] The faucet device also includes a first downstream flow path which is a flow path downstream of the water discharge switching unit, a second downstream flow path which is a flow path downstream of the water discharge switching unit and different from the first downstream flow path, a first connecting flow path connected to the first downstream flow path, a second connecting flow path connected to the second downstream flow path, and a second water draining operation unit which switches the communication state of the first connecting flow path and the second connecting flow path with the outside.

[0019] This allows the faucet device to drain hot and cold water from multiple downstream flow paths by operating a single drainage operation unit, making it easy for users to perform the drainage operation.

[0020] The second drainage operation unit includes a first seal that switches the communication state between the first connection flow path and the second connection flow path, and a second seal that switches the communication state between the second connection flow path and the outside. The timing at which the communication state is switched by the first seal and the timing at which the communication state is switched by the second seal are different.

[0021] This allows the faucet device to switch the communication state using the second draining operation section with a small force.

[0022] The second water drainage operating unit includes a first switching valve that switches the communication state between the first connecting flow path and the outside, a second switching valve that switches the communication state between the second connecting flow path and the outside, a shaft that operates the first switching valve and the second switching valve by rotating the shaft, a motor that rotates the shaft, and a handle that can manually operate the shaft.

[0023] As a result, the faucet device can use the motor to discharge hot and cold water from the first downstream flow path and the second downstream flow path to the outside. This allows the user to easily perform the draining operation. The faucet device can also manually discharge hot and cold water from the first downstream flow path and the second downstream flow path to the outside. This allows the faucet device to perform the draining operation manually, for example, during a power outage. Furthermore, because the faucet device can perform the draining operation by operating the motor and the draining operation by manual operation using a single shaft, the faucet device can be made smaller.

[0024] In addition, the rotation direction of the shaft that connects the first connecting flow path and the second connecting flow path with the outside by the motor is a first direction, and the rotation direction of the shaft that connects the first connecting flow path and the second connecting flow path with the outside by the handle is a second direction opposite to the first direction, and the second water draining operation unit is provided with a biasing spring that biases the shaft to a neutral position in the first direction and the second direction.

[0025] This allows the faucet device to automatically return the shaft to the neutral position when, for example, the handle is released after the water has been drained by operating the handle. Therefore, the faucet device can return the shaft to the neutral position even if, for example, the user forgets to return the handle.

[0026] The shaft is provided with a first cam and a second cam that protrude radially, and as the shaft rotates, the first cam comes into contact with each switching valve, thereby switching the communication state between the first connection flow path and the second connection flow path and the outside, and the second cam comes into contact with each switching valve, thereby switching the communication state between the first connection flow path and the second connection flow path and the outside.

[0027] This allows the water faucet device to operate each switching valve using each cam, thereby switching the communication state between each connecting flow path and the outside.

[0028] The faucet device also includes a downstream flow path that is a flow path downstream of the water discharge switching unit, a discharge flow path that is connected to the downstream flow path and communicates with the outside, and a switching valve that switches the communication state between the downstream flow path and the discharge flow path. The switching valve is an automatic open valve that closes when hot or cold water flows in the downstream flow path and opens when hot or cold water does not flow in the downstream flow path.

[0029] This allows the faucet device to automatically switch the discharge of hot and cold water from the downstream flow path depending on whether or not there is a flow of hot and cold water in the downstream flow path. [Effects of the Invention]

[0030] According to one aspect of the embodiment, the faucet body can be housed in the concealing member while preventing the faucet body from interfering with other members. [Brief explanation of the drawings]

[0031] [Figure 1] FIG. 1 is a schematic diagram showing an example of a bathroom unit in which a water faucet device according to a first embodiment is installed. [Figure 2] FIG. 2 is a front view of the remote controller according to the first embodiment. [Figure 3] FIG. 3 is a block diagram showing an outline of the water faucet device according to the first embodiment. [Figure 4] FIG. 4 is a perspective view of the faucet body. [Figure 5] FIG. 5 is a perspective view of the mixer faucet unit and the flow path unit. [Figure 6] FIG. 6 is a front view of the mixer faucet unit. [Figure 7] FIG. 7 is a perspective view taken along the line VII-VII in FIG. [Figure 8] FIG. 8 is a plan view of the mixer tap unit and the flow path unit according to the first embodiment. [Figure 9] FIG. 9 is a rear view of the mixer faucet unit and the flow path unit. [Figure 10] FIG. 10 is a cross-sectional view showing the flow path unit taken along the line XX in FIG. [Figure 11] FIG. 11 is a cross-sectional view showing the flow path unit taken along the line XI-XI in FIG. [Figure 12] FIG. 12 is a diagram showing the flow of hot and cold water in the flow passage unit when water is discharged from the hand shower. [Figure 13] FIG. 13 is a diagram showing the flow of hot and cold water in the flow path unit when water is discharged from the hand shower. [Figure 14] FIG. 14 is a diagram showing the flow of hot and cold water in the passage unit when draining water. [Figure 15] FIG. 15 is a diagram showing the flow of hot and cold water in the flow path unit when draining water. [Figure 16] FIG. 16 is a plan view showing a mixer tap unit and part of a flow path unit according to the second embodiment. [Figure 17] FIG. 17 is a perspective view of the XVI-XVI cross section of FIG. [Figure 18] FIG. 18 is a perspective view of the shaft. [Figure 19] 19 is a cross-sectional view showing a part of the flow path unit taken along the line XIX-XIX in FIG. [Figure 20] FIG. 20 is a cross-sectional view of the vicinity of the faucet supply passage according to the modified example, taken along a plane perpendicular to the left-right direction. DETAILED DESCRIPTION OF THE INVENTION

[0032] (First embodiment) The faucet device 1 according to the first embodiment is provided, for example, in a bathroom unit 1000 as shown in Figure 1. Figure 1 is a schematic diagram showing an example of a bathroom unit 1000 in which the faucet device 1 according to the first embodiment is provided.

[0033] Bathroom unit 1000 comprises a bathtub 1001, a first counter 1002 (concealing member), a second counter 1003, and a faucet device 1. In the following, when there is no need to distinguish between water discharged by faucet device 1, hot water, and mixed water discharged by faucet device 1 after water has been mixed, they will be referred to as "hot water."

[0034] In the following, the direction in which the second counter 1003 protrudes from the wall 1004a of the bathroom unit 1000 is referred to as the front, and the opposite side of the front is referred to as the rear, and the vertical direction is referred to as the down, and the opposite side of the down is referred to as the up, and the direction perpendicular to the front, back, and up, and down is referred to as the left, right, and left directions.

[0035] The first counter 1002 is attached to the wall portion 1004a of the bathroom unit 1000. The first counter 1002 protrudes from the wall portion 1004a into the bathroom. The first counter 1002 is provided above the washing area floor 1005 of the bathroom unit 1000. The faucet body 3 of the faucet device 1 is housed in the first counter 1002.

[0036] The second counter 1003 is attached to the wall 1004a. The second counter 1003 protrudes from the wall 1004a into the bathroom. The second counter 1003 is provided higher than the first counter 1002. For example, the second counter 1003 is provided so as to extend above the bathtub 1001. Note that the second counter 1003 does not have to extend above the bathtub 1001.

[0037] The second counter 1003 houses a portion of the faucet device 1. Specifically, the second counter 1003 houses a portion of the faucet 10 of the faucet device 1 and a portion of the hand shower 11 of the faucet device 1. The second counter 1003 is provided so that the spout 10a of the faucet 10 is exposed. The spout 10a of the faucet 10 is provided on the second counter 1003 so that the direction of hot and cold water spouting is downward.

[0038] In addition, the shower hose 11a of the hand shower 11 of the faucet device 1 is connected to the second counter 1003. The shower hose 11a is connected to a shower water conduit housed in the second counter 1003.

[0039] An overhead shower 12 of the faucet device 1 and a warm pillar 13 of the faucet device 1 are attached to the ceiling 1006 of the bathroom unit 1000. The overhead shower 12 and the warm pillar 13 are provided integrally.

[0040] The overhead shower 12 sprays hot water over a wider area of ​​the user than the hand shower 11. For example, the overhead shower 12 is configured so that hot water hits the entire body of the user. The warm pillar 13 collects hot water into a single stream and sprays it straight. In other words, the warm pillar 13 straightens and sprays the hot water so that it flows down in a continuous column.

[0041] A remote control 4 for the faucet device 1 is attached to a wall portion 1004b of the bathroom unit 1000. The remote control 4 may be attached to the wall portion 1004a on which the first counter 1002 and the second counter 1003 are attached.

[0042] The remote control 4 accepts various operations by the user on the faucet main body 3. Specifically, the remote control 4 accepts operations to set the hot and cold water temperature in the faucet main body 3. The remote control 4 accepts operations to set the hot and cold water flow rate in the faucet main body 3. The remote control 4 accepts operations to switch between discharging hot and cold water and stopping the water. The remote control 4 accepts operations to switch the destination for discharging hot and cold water. When operated by the user, the remote control 4 sends an operation signal corresponding to each operation to the control device 7 of the faucet device 1 (see Figure 3).

[0043] 2, the remote control 4 includes, for example, a temperature adjustment button 41, a water volume adjustment button 42, and a switching button 43. Fig. 2 is a front view of the remote control 4 according to the first embodiment.

[0044] The temperature adjustment button 41 is a button for adjusting the temperature of the mixed water in the faucet body 3. The temperature adjustment button 41 includes a high temperature button 41a and a low temperature button 41b. The high temperature button 41a is a button for increasing the temperature of the mixed water. The low temperature button 41b is a button for decreasing the temperature of the mixed water. The remote control 4 displays the set temperature of the mixed water on the first display unit 45a. When the high temperature button 41a or the low temperature button 41b is operated, the display on the first display unit 45a changes in accordance with the operation of each button 41a, 41b.

[0045] The temperature of the mixed water in the faucet body 3 can be adjusted within a predetermined temperature range. When the low temperature button 41b is operated and the set temperature of the mixed water becomes lower than the lowest temperature in the predetermined temperature range, the faucet body 3 does not mix hot water with cold water and instead dispenses cold water.

[0046] The water volume adjustment button 42 is a button for adjusting the flow rate of hot and cold water dispensed from the faucet device 1. The water volume adjustment button 42 includes an increase water button 42a and a decrease water button 42b. The increase water button 42a is a button for increasing the flow rate of hot and cold water. The decrease water button 42b is a button for decreasing the flow rate of hot and cold water. The remote control 4 displays the set status of the hot and cold water volume on the second display unit 45b. When the increase water button 42a or the decrease water button 42b is operated, the display on the second display unit 45b changes in accordance with the operation of each button 42a, 42b. The flow rate of hot and cold water dispensed from the faucet device 1 can be adjusted within a predetermined flow rate range.

[0047] The switching button 43 is a button for switching between discharging hot and cold water and stopping the water supply in the faucet device 1. The switching button 43 is also a button for switching the destination of the hot and cold water supply in the faucet device 1. The switching buttons 43 include a faucet button 43a, a hand shower button 43b, an overhead shower button 43c, and a warm pillar button 43d. Each of the buttons 43a to 43d can be switched between "ON" and "OFF" when pressed by the user.

[0048] When each of the buttons 43a to 43d of the switching button 43 is set to "OFF," hot or cold water is not discharged. In other words, the water faucet device 1 is in a water stop state.

[0049] When any one of the switching buttons 43, 43a to 43d, is pressed from the "OFF" state, and the pressed switching button 43 becomes "ON," hot or cold water is discharged. In other words, the water faucet device 1 changes from a water stop state to a water discharge state.

[0050] When one of the switching buttons 43 is "ON" and another switching button 43 is pressed, the switching button 43 that is "ON" is changed, and the destination of hot and cold water is switched.

[0051] For example, when hand shower button 43b is "ON," hot and cold water is discharged from hand shower 11. When faucet button 43a is pressed in this state, hand shower button 43b turns "OFF" and faucet button 43a turns "ON." This changes the destination of hot and cold water discharge from hand shower 11 to faucet 10, and hot and cold water is discharged from faucet 10.

[0052] When the "ON" switch button 43 is pressed again, the pressed switch button 43 turns "OFF," and each of the buttons 43a to 43d of the switch button 43 turns "OFF," stopping the flow of hot and cold water. In other words, the water faucet device 1 changes from a water discharge state to a water stop state.

[0053] Each of the buttons 43a to 43d is configured so that the user can distinguish between the "ON" and "OFF" states. For example, a switching button 43 that is "ON" lights up, and a switching button 43 that is "OFF" lights up.

[0054] Although the faucet device 1 capable of discharging hot and cold water from the overhead shower 12, warm pillar 13, hand shower 11, and faucet 10 has been described as an example here, the present invention is not limited to this. For example, the faucet device 1 may be configured without the overhead shower 12 and warm pillar 13.

[0055] Next, an overview of the faucet device 1 according to the first embodiment will be described with reference to Fig. 3. Fig. 3 is a block diagram showing an overview of the faucet device 1 according to the first embodiment. In Fig. 3, the flow of hot and cold water is indicated by solid arrows, and communication lines are indicated by dashed lines.

[0056] In the following description, in the flow direction of hot water flowing from the water supply source 81 or the hot water supply source 80 toward the water discharge section 2, the water supply source 81 or the hot water supply source 80 side is referred to as upstream, and the water discharge section 2 side is referred to as downstream.

[0057] The faucet device 1 comprises a plurality of water discharge units 2, a faucet body 3, a remote control 4, and a communication unit 5.

[0058] The plurality of water discharge units 2 include a faucet 10, a hand shower 11, an overhead shower 12, and a warm pillar 13.

[0059] The faucet body 3 includes a mixer faucet unit 20, a water discharge switching section 30, and a control device 7.

[0060] The mixing faucet unit 20 includes a hot and cold water mixing section 50 and a flow rate adjustment section 60. Hot water is supplied to the hot and cold water mixing section 50 from a hot water supply source 80. Water is also supplied to the hot and cold water mixing section 50 from a water supply source 81. A stop valve 84 is provided in a hot water supply path 701 between the hot and cold water mixing section 50 and the hot water supply source 80. A stop valve 85 is also provided in a water supply path 700 between the hot and cold water mixing section 50 and the water supply source 81.

[0061] The hot and cold water mixing unit 50 mixes hot water supplied from the hot water supply source 80 with cold water supplied from the cold water supply source 81. Specifically, the hot and cold water mixing unit 50 switches whether or not to mix hot water with cold water. The hot and cold water mixing unit 50 also adjusts the ratio of hot water to be mixed with cold water, thereby adjusting the temperature of the mixed water.

[0062] The hot and cold water mixing unit 50 includes a motor 51. The motor 51 is, for example, a stepping motor. When the temperature adjustment button 41 on the remote control 4 is operated, the hot and cold water mixing unit 50 drives the temperature control valve 210 (see FIG. 7) to switch whether or not to mix hot water with cold water.

[0063] Furthermore, in response to operation of the temperature adjustment button 41 on the remote control 4, the hot and cold water mixing unit 50 drives the temperature control valve 210 by driving the motor 51, thereby adjusting the ratio of hot water to be mixed with water. Furthermore, even if the temperature adjustment button 41 is not operated, when the temperature of the hot water changes and the temperature of the mixed water changes, the hot and cold water mixing unit 50 can automatically adjust the temperature of the mixed water by adjusting the ratio of the flow rate of hot water to the flow rate of water according to the temperature of the mixed water.

[0064] Hot and cold water flows into the flow rate adjusting unit 60 from the hot and cold water mixing unit 50. When hot and cold water is discharged from the water discharge unit 2, the flow rate adjusting unit 60 adjusts the flow rate of the discharged hot and cold water.

[0065] The flow rate adjustment unit 60 includes a motor 61. The motor 61 is, for example, a stepping motor. In response to operation of the water volume adjustment button 42 on the remote control 4, the motor 61 is driven to drive the flow regulation valve 230 (see FIG. 7), thereby adjusting the flow rate of hot and cold water.

[0066] The water discharge switching unit 30 is located downstream of the mixer faucet unit 20. The water discharge switching unit 30 switches between discharging or stopping the hot and cold water flowing out of the mixer faucet unit 20. In other words, the water discharge switching unit 30 switches between discharging or stopping the hot and cold water from the water discharge unit 2. The water discharge switching unit 30 also switches the destination of the hot and cold water to be discharged. The faucet device 1 switches between discharging or stopping the hot and cold water from the water discharge unit 2 using the water discharge switching unit 30, and adjusts the flow rate of the hot and cold water when it is being discharged using the flow rate adjustment unit 60.

[0067] The water discharge switching unit 30 includes a plurality of solenoid valves 31 to 35. Specifically, the water discharge switching unit 30 includes a first solenoid valve 31, a second solenoid valve 32, a third solenoid valve 33, and a fourth solenoid valve 34. The water discharge switching unit 30 may also include a fifth solenoid valve 35.

[0068] The first solenoid valve 31 to the fourth solenoid valve 34 are switched between "closed (OFF)" and "open (ON)" in response to the operation of the switching button 43.

[0069] When the first solenoid valve 31 to the fourth solenoid valve 34 are "closed," hot or cold water is not discharged from the water discharge section 2. In other words, when the first solenoid valve 31 to the fourth solenoid valve 34 are "closed," hot or cold water is stopped. When any one of the first solenoid valve 31 to the fourth solenoid valve 34 is "open," hot or cold water is discharged from the water discharge section 2 corresponding to the solenoid valve that is "open."

[0070] The first solenoid valve 31 switches between discharging hot and cold water at the faucet 10 and stopping the water flow. The second solenoid valve 32 switches between discharging hot and cold water at the hand shower 11 and stopping the water flow. The third solenoid valve 33 switches between discharging hot and cold water at the overhead shower 12 and stopping the water flow. The fourth solenoid valve 34 switches between discharging hot and cold water at the warm pillar 13 and stopping the water flow.

[0071] For example, when the first solenoid valve 31 is "open" and the second solenoid valve 32 to the fourth solenoid valve are "closed", hot and cold water is discharged from the faucet .

[0072] The fifth solenoid valve 35 is switched to "closed (OFF)" or "open (ON)" in response to operation by an external device 89 (for example, a multi-remote control provided in the bathroom). The fifth solenoid valve 35 may also be switched to "closed" or "open" in response to operation by the remote control 4. The fifth solenoid valve 35 is a valve for discharging residual water from the hose of the hand shower 11 or the like and from the piping, and is normally kept "closed." In other words, the fifth solenoid valve 35 is "open" only when residual water treatment is performed. When the fifth solenoid valve 35 is "open," residual water is discharged from the residual water discharge flow path 88.

[0073] The control device 7 controls the motors 51, 61 and the first solenoid valve 31 to the fourth solenoid valve 34 in response to the operation of the faucet body 3 received by operating the remote control 4. The control device 7 also controls the fifth solenoid valve 35 in response to the operation of an external device 89, for example.

[0074] The control device 7 is a controller. The control device 7 includes, for example, a microcomputer having a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), etc., and various circuits. The control device 7 may also include hardware such as an ASIC (Application Specific Integrated Circuit) or FPGA (Field Programmable Gate Array).

[0075] The communication unit 5 receives operation signals from the remote control 4 and the external device 89, and transmits the received operation signals to the control device 7. The remote control 4 and the external device 89 are connected to the communication unit 5 by wired communication or wireless communication. The control device 7 is connected to the communication unit 5 by wired communication or wireless communication.

[0076] Next, the faucet body 3 will be described with reference to Figure 4. Figure 4 is a perspective view of the faucet body 3. The faucet body 3 comprises a mixer faucet unit 20, a water discharge switching unit 30, and a control device 7 (see Figure 3), as well as a flow path unit 70. The faucet body 3 is attached to the wall 1004a (see Figure 1) of the bathroom unit 1000 by the flow path unit 70.

[0077] In the faucet body 3, the flow path unit 70 is provided at the rear, and the mixer faucet unit 20 is provided in front of the flow path unit 70. A part of the flow path unit 70 is provided above the mixer faucet unit 20. A control box 7a that houses the control device 7 is provided in front of the mixer faucet unit 20. The control box 7a is provided in front of the water discharge switching unit 30. The water discharge switching unit 30 is provided above the mixer faucet unit 20. The hot and cold water mixing unit 50 (see Figure 7) of the mixer faucet unit 20 and the water discharge switching unit 30 are arranged so that at least a portion of them overlap when viewed from above.

[0078] Next, the mixer faucet unit 20 will be described with reference to Figures 5 to 7. Figure 5 is a perspective view of the mixer faucet unit 20 and the flow path unit 70. Figure 6 is a front view of the mixer faucet unit 20. Figure 7 is a perspective view of the VII-VII cross section of Figure 6.

[0079] The mixer faucet unit 20 is provided so as to extend in the left-right direction. A motor case 200 that houses the motor 51 of the hot and cold water mixing section 50 is provided at one left-right end of the mixer faucet unit 20, specifically the left end. A motor case 201 that houses the motor 61 of the flow rate adjustment section 60 is provided at the other left-right end of the mixer faucet unit 20, specifically the right end.

[0080] The hot and cold water mixing unit 50 switches whether or not to mix the hot water supplied from the hot water supply unit 203 with the water supplied from the water supply unit 202 by moving the temperature adjustment valve 210 (adjustment valve) in the left-right direction.

[0081] For example, when the temperature control valve 210 abuts against a case 211 provided to the left of the temperature control valve 210, the supply of hot water is blocked by the temperature control valve 210, and the hot water is not mixed with the water supplied from the water supply unit 202.

[0082] Furthermore, by separating the temperature control valve 210 from the case 211, the supply of hot water is not blocked by the temperature control valve 210, and the hot water supplied from the hot water supply unit 203 is mixed with the water supplied from the water supply unit 202.

[0083] The temperature control valve 210 is biased by the temperature sensitive spring 212 in a direction away from the case 211. The temperature control valve 210 is also biased by the bias spring 213 in a direction toward contact with the case 211. That is, the temperature control valve 210 moves left and right depending on the magnitude relationship between the biasing force of the temperature sensitive spring 212 and the biasing force of the bias spring 213.

[0084] The temperature-sensitive spring 212 is a spring whose spring constant changes depending on the temperature, and is made of, for example, a shape memory alloy. The bias spring 213 is a spring whose spring constant is almost constant regardless of the temperature.

[0085] When the biasing force of the bias spring 213 is greater than the biasing force of the temperature-sensing spring 212, the temperature control valve 210 moves leftward toward the case 211. When the temperature control valve 210 is in contact with the case 211, the temperature control valve 210 is maintained in contact with the case 211.

[0086] When the biasing force of the temperature-sensing spring 212 is greater than the biasing force of the bias spring 213, the temperature adjustment valve 210 moves to the right so as to move away from the case 211.

[0087] When the biasing force of the temperature sensitive spring 212 and the biasing force of the bias spring 213 are equal, the temperature adjustment valve 210 does not move left or right and is held in a position where the biasing force of the temperature sensitive spring 212 and the biasing force of the bias spring 213 are balanced.

[0088] The temperature-sensing spring 212 abuts against the liner 214 at one end opposite to the end that abuts against the temperature control valve 210. The liner 214 is connected to a rotating shaft 216 via a spindle 215. The spindle 215 is rotatably supported by the case 211, and converts the rotational movement of the rotating shaft 216 into linear movement of the liner 214 in the left-right direction. Therefore, the liner 214 moves left-right in response to the rotation of the rotating shaft 216.

[0089] The rotation shaft 216 is connected to the motor 51 via a transmission mechanism. The transmission mechanism is housed in the motor case 200. The transmission mechanism includes, for example, a plurality of gears.

[0090] In the hot and cold water mixing unit 50, the liner 214 moves left and right in accordance with the rotational position of the rotating shaft 216, i.e., in accordance with the rotational position of the rotating shaft of the motor 51. That is, the hot and cold water mixing unit 50 can change the position of the temperature control valve 210 to a position where the biasing force of the temperature sensitive spring 212 and the biasing force of the bias spring 213 are balanced in accordance with the rotational position of the rotating shaft of the motor 51. As a result, when discharging mixed water, the hot and cold water mixing unit 50 can set the temperature of the mixed water to a set temperature that corresponds to the rotational position of the rotating shaft of the motor 51.

[0091] Furthermore, when discharging mixed water, if the temperature of the hot water changes and the temperature of the mixed water changes, for example, the temperature-sensitive spring 212 expands and contracts according to the temperature of the mixed water, and the temperature control valve 210 moves left and right, automatically changing the equilibrium position of the temperature control valve 210. This adjusts the amount of hot water and cold water in the mixed water, and automatically adjusts the temperature of the mixed water.

[0092] The hot and cold water mixer 50 is in communication with the flow rate adjuster 60 via a communication hole 220. Hot and cold water flows into the flow rate adjuster 60 from the hot and cold water mixer 50 via the communication hole 220.

[0093] The flow rate adjustment unit 60 rotates the flow rate adjustment valve 230 (adjustment valve) around an imaginary axis extending in the left-right direction, thereby changing the area of ​​communication between the opening of the restricting member 221 and the opening of the flow rate adjustment valve 230, and changing the opening degree of the flow rate adjustment valve 230. By changing the opening degree of the flow rate adjustment valve 230, the flow rate adjustment unit 60 adjusts the flow rate of hot and cold water flowing out from the hot and cold water discharge unit 204 of the mixing faucet unit 20, i.e., the flow rate of hot and cold water discharged from the water discharge unit 2 (see Figure 3).

[0094] The flow regulation valve 230 is connected to a rotating shaft 231. The rotating shaft 231 is connected to the motor 61 via a transmission mechanism. The transmission mechanism is housed in the motor case 201. The transmission mechanism includes, for example, a plurality of gears.

[0095] Flow adjustment valve 230 rotates within a predetermined rotation range in response to the user's operation of water volume adjustment buttons 42 (increase water button 42a, decrease water button 42b) on remote control 4. When water is not being discharged from water discharger 2, flow adjustment valve 230 is held in a rotation position in response to the operation of water volume adjustment button 42. In other words, when water is not being discharged from water discharger 2, the opening degree of flow adjustment valve 230 is held at the opening degree when water discharger 2 was discharging water.

[0096] Next, the flow path unit 70 according to the first embodiment will be described with reference to Fig. 5 and Figs. 8 to 11. Fig. 8 is a plan view of the mixer faucet unit 20 and the flow path unit 70 according to the first embodiment. Fig. 9 is a rear view of the mixer faucet unit 20 and the flow path unit 70. Fig. 10 is a cross-sectional view showing the flow path unit 70 at cross section XX in Fig. 8. Fig. 11 is a cross-sectional view showing the flow path unit 70 at cross section XI-XI in Fig. 8.

[0097] The flow path unit 70 includes a water supply path 700, a hot water supply path 701, a hot and cold water inlet path 702, a faucet supply path 703, a hand shower supply path 704, an overhead shower supply path 705, a warm pillar supply path 706, and a residual water discharge path 707. The flow path unit 70 also includes a bypass flow path 710, a first discharge path 711, a second discharge path 712, a third discharge path 713, a fourth discharge path 714, a first combined discharge path 715, and a second combined discharge path 716.

[0098] The flow path unit 70 also includes stopcocks 84 and 85, check valves 720 and 721, an opening / closing operation unit 722, a first draining unit 723, a second draining unit 724, a third draining unit 725, and a fourth draining unit 726.

[0099] Water supply channel 700 is connected to a water supply pipe provided in wall portion 1004a (see Figure 1) of bathroom unit 1000. Water supply channel 700 is connected to water supply section 202 (see Figure 7) of hot and cold water mixing section 50 of mixer tap unit 20. Water supply channel 700 supplies water supplied from water supply source 81 to water supply section 202 of hot and cold water mixing section 50. Stop valve 85 and check valve 721 are provided in water supply channel 700. Check valve 721 is provided downstream of stop valve 85.

[0100] Hot water supply path 701 is connected to a hot water supply pipe provided in wall portion 1004a of bathroom unit 1000. Hot water supply path 701 is connected to hot water supply section 203 (see Figure 7) of hot water and cold water mixing section 50 of mixer faucet unit 20. Hot water supply path 701 supplies hot water supplied from hot water source 80 to hot water supply section 203 of hot water and cold water mixing section 50. Hot water supply path 701 is provided with stop valve 84 and check valve 720. Check valve 720 is provided downstream of stop valve 84.

[0101] The hot and cold water inlet channel 702 is connected to the hot and cold water outlet section 204 (see Figure 7) of the mixer faucet unit 20. The hot and cold water inlet channel 702 is arranged to extend upward from the hot and cold water outlet section 204. The hot and cold water inlet channel 702 includes a hot and cold water switching channel 702a. The hot and cold water switching channel 702a is arranged on the downstream side of the hot and cold water inlet channel 702. The hot and cold water switching channel 702a is arranged to extend in the left-right direction.

[0102] Connected to hot and cold water switching passage 702a are faucet supply passage 703, hand shower supply passage 704, overhead shower supply passage 705, warm pillar supply passage 706, and residual water drain passage 707. Faucet supply passage 703, hand shower supply passage 704, overhead shower supply passage 705, and warm pillar supply passage 706 are provided above hot and cold water inlet passage 702.

[0103] Faucet supply passage 703 is connected to a faucet supply pipe provided in wall portion 1004a (see FIG. 1) of bathroom unit 1000. Faucet supply passage 703 is provided with first electromagnetic valve 31.

[0104] Hand shower supply passage 704 is connected to a hand shower supply pipe provided in wall portion 1004a of bathroom unit 1000. Faucet supply passage 703 is provided with second solenoid valve 32.

[0105] The overhead shower supply passage 705 is connected to an overhead shower supply pipe provided in the wall portion 1004a of the bathroom unit 1000. The overhead shower supply passage 705 is provided with a third solenoid valve 33.

[0106] The warm pillar supply passage 706 is connected to a warm pillar supply pipe provided in a wall portion 1004a of the bathroom unit 1000. A fourth solenoid valve 34 is provided in the warm pillar supply passage 706.

[0107] The residual water discharge path 707 is connected to the residual water discharge flow path 88. The residual water discharge path 707 is provided with a fifth electromagnetic valve 35.

[0108] Residual water discharge flow path 88 is formed, for example, in an L shape, and extends rearward from residual water discharge path 707 and then extends downward. The lower end of residual water discharge flow path 88 opens toward washing area floor 1005 (see FIG. 1).

[0109] Bypass flow path 710 connects water supply path 700 and hand shower supply path 704. Bypass flow path 710 connects water supply path 700 and hand shower supply path 704 across mixer tap unit 20. In other words, bypass flow path 710 connects water supply path 700 and hand shower supply path 704, bypassing mixer tap unit 20. Bypass flow path 710 connects an upper part of water supply path 700, for example, water supply path 700 near water supply unit 202, to the bottom side of hand shower supply path 704. Bypass flow path 710 connects water supply path 700, which is a flow path upstream of second solenoid valve 32, to hand shower supply path 704 downstream of second solenoid valve 32 (downstream flow path). The connection point between water supply passage 700 and bypass passage 710, and the connection point between hand shower supply passage 704 and bypass passage 710, are located higher than drainage hole 700a (described below), i.e., above. All of bypass passages 710 are located higher than the location where drainage hole 700a is provided. Bypass passage 710 is formed so that its height decreases from the connection point with hand shower supply passage 704 toward the connection point with water supply passage 700. First seal portion 722b of opening / closing operation part 722 is inserted into bypass passage 710.

[0110] The first discharge path 711 connects the faucet supply path 703 and the first joint discharge path 715. The first discharge path 711 is connected to the bottom side of the faucet supply path 703. A first seal portion 725c of the third water drain portion 725 is inserted into the first discharge path 711.

[0111] The second discharge channel 712 connects the hot and cold water inlet channel 702 and the first combined discharge channel 715. Specifically, the second discharge channel 712 connects an upper hot and cold water inlet channel 702, for example, a hot and cold water inlet channel 702 near the hot and cold water switching channel 702a, to the first combined discharge channel 715.

[0112] The third discharge path 713 connects the overhead shower supply path 705 and the second combined discharge path 716. The third discharge path 713 is connected to the bottom side of the overhead shower supply path 705. The third discharge path 713 (first connecting path) is connected to the overhead shower supply path 705 (first downstream path) downstream of the third solenoid valve 33.

[0113] The fourth discharge passage 714 connects the worm pillar supply passage 706 and the second joining discharge passage 716. The fourth discharge passage 714 is connected to the bottom side of the worm pillar supply passage 706. The fourth discharge passage 714 (second connecting passage) is connected to the worm pillar supply passage 706 (second downstream passage) downstream of the fourth solenoid valve 34. A first seal portion 726c of a fourth water drain portion 726 is inserted into the fourth discharge passage 714.

[0114] The first combined discharge channel 715 is connected to the first discharge channel 711 and the second discharge channel 712. The first combined discharge channel 715 is provided below the faucet supply channel 703. The second discharge channel 712 connects to the first combined discharge channel 715 below the first discharge channel 711. The first combined discharge channel 715 extends downward. The lower end of the first combined discharge channel 715 opens toward the washing area floor 1005 (see FIG. 1). The second seal portion 725d of the third drain portion 725 is inserted into the first combined discharge channel 715.

[0115] The second combined discharge channel 716 is connected to the third discharge channel 713 and the fourth discharge channel 714. The second combined discharge channel 716 is provided below the overhead shower supply channel 705 and the warm pillar supply channel 706. The third discharge channel 713 connects to the second combined discharge channel 716 below the fourth discharge channel 714. The second combined discharge channel 716 extends downward. The lower end of the second combined discharge channel 716 opens toward the washing area floor 1005. A second seal portion 726d of the fourth water drain portion 726 is inserted into the second combined discharge channel 716.

[0116] Stopcocks 84 and 85 are provided so that a user can operate them from below. For example, operating sections 84a and 85a of stopcocks 84 and 85 are provided so as to be exposed below first counter 1002 (see FIG. 1).

[0117] When the water pressure upstream of check valve 721 is greater than the water pressure downstream of check valve 721, check valve 721 opens and supplies water to hot and cold water mixing section 50 via water supply path 700. When the water pressure upstream of check valve 721 is less than the water pressure downstream of check valve 721, check valve 721 closes and blocks the flow of water from hot and cold water mixing section 50 to water supply source 81.

[0118] When the water pressure upstream of the check valve 720 is greater than the water pressure downstream of the check valve 720, the check valve 720 opens, and hot water is supplied to the hot and cold water mixing unit 50 via the hot water supply path 701. When the water pressure upstream of the check valve 720 is less than the water pressure downstream of the check valve 720, the check valve 720 closes, and the flow of hot water from the hot and cold water mixing unit 50 to the hot water source 80 is blocked.

[0119] Opening / closing operation unit 722 switches the communication state of bypass flow path 710. The communication state of bypass flow path 710 can be switched between "open (communicating)" and "closed (blocked)." When the communication state of bypass flow path 710 is "open," water supply path 700 and hand shower supply path 704 communicate with each other. When the communication state of bypass flow path 710 is "closed," water supply path 700 and hand shower supply path 704 do not communicate with each other.

[0120] A portion of the opening / closing operation unit 722 is inserted into the operation channel 718 that connects to the water supply channel 700. The opening / closing operation unit 722 is configured to extend in the vertical direction. The opening / closing operation unit 722 has an operation unit 722a at its lower end. The operation unit 722a is provided so that the user can operate it from below. Specifically, the operation unit 722a is provided so as to be exposed below the first counter 1002 (see FIG. 1).

[0121] The opening / closing operation part 722 is threadedly engaged with the operation path 718, and moves up and down when the operation part 722a is rotated.

[0122] The opening / closing operation unit 722 is provided with a first seal portion 722b and a second seal portion 722c. The first seal portion 722b is provided on the upper end side of the opening / closing operation unit 722. The first seal portion 722b is held by the opening / closing operation unit 722 and inserted into the bypass flow path 710. The first seal portion 722b switches the communication state of the bypass flow path 710 by moving the opening / closing operation unit 722 up and down.

[0123] When the first seal portion 722b is inserted into the bypass flow path 710, the first seal portion 722b seals the bypass flow path 710, and puts the communication state of the bypass flow path 710 into the "closed" state.

[0124] When the first seal portion 722b is not inserted into the bypass flow passage 710, the first seal portion 722b does not seal the bypass flow passage 710, and the communication state of the bypass flow passage 710 is "open."

[0125] The second seal portion 722c is provided below the first seal portion 722b. The second seal portion 722c is held by the opening / closing operation portion 722 and inserted into the reduced diameter portion 718a of the operation path 718. The second seal portion 722c seals the reduced diameter portion 718a. The second seal portion 722c seals the reduced diameter portion 718a even when the communication state of the bypass flow path 710 is set to "open."

[0126] The first water draining section 723 (first water draining operation section) switches the communication state between the water drain hole 700a formed in the water supply channel 700 and the outside. The communication state between the water drain hole 700a and the outside can be switched between "open" and "closed." When the communication state between the water drain hole 700a and the outside is "open," the water supply channel 700 is in communication with the outside. When the communication state between the water drain hole 700a and the outside is "closed," the water supply channel 700 is not in communication with the outside. The water draining hole 700a is formed on the lower end side of the water supply channel 700.

[0127] A portion of the first draining portion 723 is inserted into the draining hole 700a. The first draining portion 723 includes a fixing portion 723a and an operating portion 723b. A portion of the fixing portion 723a is inserted into and fixed in the draining hole 700a. The fixing portion 723a is cylindrical, and the operating portion 723b is inserted into the fixing portion 723a. The operating portion 723b is provided so that the user can operate it from below. Specifically, the operating portion 723b is provided so as to be exposed below the first counter 1002 (see FIG. 1).

[0128] Operating portion 723b is threadedly engaged with fixed portion 723a, and when operating portion 723b is rotated, it moves up and down relative to fixed portion 723a. When water is not being supplied from water supply source 81 by stopcock 85 and operating portion 723b is moved upward, operating portion 723b pushes up check valve 721. As a result, check valve 721 becomes "open." Furthermore, when operating portion 723b moves upward, seal portion 723c provided between fixed portion 723a and operating portion 723b moves upward together with operating portion 723b and comes off fixed portion 723a. In other words, when operating portion 723b moves upward, the seal between operating portion 723b and fixed portion 723a is released. As a result, when operating portion 723b moves upward, drain hole 700a becomes "open" in communication with the outside.

[0129] Furthermore, when operating portion 723b moves downward from a state in which the seal between operating portion 723b and fixed portion 723a is released, check valve 721 is biased by spring 721a and becomes "closed." Furthermore, when operating portion 723b moves downward, seal portion 723c moves downward together with operating portion 723b and is inserted into fixed portion 723a. In other words, when operating portion 723b moves downward, operating portion 723b and fixed portion 723a are sealed. As a result, when operating portion 723b moves downward, the communication state between drain hole 700a and the outside becomes "closed."

[0130] The second draining section 724 switches the communication state between the draining hole 701a formed in the hot water supply channel 701 and the outside. The communication state between the draining hole 701a and the outside can be switched between "open" and "closed." When the communication state between the draining hole 701a and the outside is "open," the hot water supply channel 701 is connected to the outside. When the communication state between the draining hole 701a and the outside is "closed," the hot water supply channel 701 is not connected to the outside. The draining hole 701a is formed on the lower end side of the hot water supply channel 701.

[0131] Second draining section 724 includes fixing section 724a and operating section 724b. The specific configuration of second draining section 724 is the same as that of first draining section 723, and detailed description thereof will be omitted.

[0132] The third water draining unit 725 switches the communication state between the first discharge channel 711 and the first combined discharge channel 715. Specifically, because the first combined discharge channel 715 is connected to the second discharge channel 712, the third water draining unit 725 switches the communication state between the first discharge channel 711 and the second discharge channel 712. The communication state between the first discharge channel 711 and the first combined discharge channel 715 is switched between "open" and "closed." When the communication state between the first discharge channel 711 and the first combined discharge channel 715 is "open," the first discharge channel 711 and the first combined discharge channel 715 communicate with each other. When the communication state between the first discharge channel 711 and the first combined discharge channel 715 is "closed," the first discharge channel 711 and the first combined discharge channel 715 do not communicate with each other.

[0133] Furthermore, the third water draining unit 725 switches the state of communication between the first merging and discharge channel 715 and the outside. Specifically, the third water draining unit 725 switches the state of communication between the first discharge channel 711 and the second discharge channel 712 and the outside. The state of communication between the first merging and discharge channel 715 and the outside can be switched between "open" and "closed." When the state of communication between the first merging and discharge channel 715 and the outside is "open," the first merging and discharge channel 715 is in communication with the outside. When the state of communication between the first merging and discharge channel 715 and the outside is "closed," the first merging and discharge channel 715 is not in communication with the outside.

[0134] A portion of the third water draining section 725 is inserted into the first merging and discharging passage 715. The third water draining section 725 is configured to extend in the vertical direction. The third water draining section 725 has an operating section 725a at its lower end. The operating section 725a is provided so that the user can operate it from below. Specifically, the operating section 725a is provided so as to be exposed below the first counter 1002.

[0135] The third water draining portion 725 is threadedly engaged with the first merging and discharging passage 715, and when the third water draining portion 725 is rotated, it moves in the vertical direction relative to the first merging and discharging passage 715. Note that the third water draining portion 725 has a through-hole 725b that penetrates in the vertical direction at the location where it threadably engages with the first merging and discharging passage 715.

[0136] The third water draining section 725 is provided with a first seal portion 725c and a second seal portion 725d. The first seal portion 725c is provided on the upper end side of the third water draining section 725. The first seal portion 725c is held by the third water draining section 725 and inserted into the first discharge channel 711. The first seal portion 725c switches the communication state between the first discharge channel 711 and the first junction discharge channel 715 by vertical movement of the third water draining section 725.

[0137] When the first seal portion 725c is inserted into the first discharge path 711, the first seal portion 725c seals the first discharge path 711, and closes the communication between the first discharge path 711 and the first junction discharge path 715.

[0138] When the first seal portion 725c is not inserted into the first discharge path 711, the first seal portion 725c does not seal the first discharge path 711, and the communication state between the first discharge path 711 and the first merging discharge path 715 is "open."

[0139] The second seal portion 725d is provided below the first seal portion 725c. The second seal portion 725d is held by the third water draining portion 725 and inserted into the reduced diameter portion 715a of the first merging and discharging channel 715. The reduced diameter portion 715a is provided below the point where the second discharge channel 712 is connected to the first merging and discharging channel 715. The second seal portion 725d switches the communication state between the first merging and discharging channel 715 and the outside by moving the third water draining portion 725 up and down.

[0140] When the second seal portion 725d is inserted into the reduced diameter portion 715a, the second seal portion 725d seals the reduced diameter portion 715a, and closes the communication between the first junction discharge path 715 and the outside.

[0141] When the second seal portion 725d is not inserted into the reduced diameter portion 715a, the second seal portion 725d does not seal the reduced diameter portion 715a, and the communication state between the first junction discharge channel 715 and the outside is "open."

[0142] In the third drain section 725, the timing of switching the communication state between the first discharge path 711 and the first merging discharge path 715 by the first seal section 725c is different from the timing of switching the communication state between the first merging discharge path 715 and the outside by the second seal section 725d.

[0143] For example, when third draining section 725 is moved downward so that each communication state changes from "closed" to "open," first, the communication state between first merging and discharging channel 715 and the outside by second seal section 725d becomes "open." Furthermore, when third draining section 725 is moved downward, the communication state between first discharge channel 711 and first merging and discharging channel 715 by first seal section 725c becomes "open."

[0144] Furthermore, when the third water draining section 725 is moved upward so that each communication state changes from "open" to "closed," first, the communication state between the first discharge path 711 and the first merging discharge path 715 by the first seal section 725c becomes "closed." Furthermore, when the third water draining section 725 is moved upward, the communication state between the first merging discharge path 715 and the outside by the second seal section 725d becomes "closed."

[0145] The fourth water draining unit 726 (second water draining operation unit) switches the communication state between the fourth discharge channel 714 and the second combined discharge channel 716. Specifically, because the third discharge channel 713 is in communication with the second combined discharge channel 716, the fourth water draining unit 726 switches the communication state between the third discharge channel 713 and the fourth discharge channel 714. The communication state between the fourth discharge channel 714 and the second combined discharge channel 716 is switched between "open" and "closed." When the communication state between the fourth discharge channel 714 and the second combined discharge channel 716 is "open," the fourth discharge channel 714 and the second combined discharge channel 716 are in communication. When the communication state between the fourth discharge channel 714 and the second combined discharge channel 716 is "closed," the fourth discharge channel 714 and the second combined discharge channel 716 are not in communication.

[0146] Furthermore, the fourth water draining section 726 switches the communication state between the second merging and discharge channel 716 and the outside. Specifically, the fourth water draining section 726 switches the communication state between the third discharge channel 713 and the fourth discharge channel 714 and the outside. The communication state between the second merging and discharge channel 716 and the outside can be switched between "open" and "closed." When the communication state between the second merging and discharge channel 716 and the outside is "open," the second merging and discharge channel 716 is in communication with the outside. When the communication state between the second merging and discharge channel 716 and the outside is "closed," the second merging and discharge channel 716 is not in communication with the outside.

[0147] A portion of the fourth water draining section 726 is inserted into the second merging and discharging passage 716. The fourth water draining section 726 is configured to extend in the vertical direction. The fourth water draining section 726 has an operating section 726a at its lower end. The operating section 726a is provided so that the user can operate it from below. Specifically, the operating section 726a is provided so as to be exposed below the first counter 1002 (see FIG. 1).

[0148] The fourth water draining portion 726 is threadedly engaged with the second merging and discharging passage 716, and when the fourth water draining portion 726 is rotated, it moves in the vertical direction relative to the second merging and discharging passage 716. Note that the fourth water draining portion 726 has a through-hole 726b that penetrates in the vertical direction at the location where it threadably engages with the second merging and discharging passage 716.

[0149] The fourth water draining section 726 is provided with a first seal portion 726c and a second seal portion 726d. The first seal portion 726c is provided on the upper end side of the fourth water draining section 726. The first seal portion 726c is held by the fourth water draining section 726 and inserted into the fourth discharge channel 714. The first seal portion 726c switches the communication state between the fourth discharge channel 714 and the second merged discharge channel 716 by moving the fourth water draining section 726 up and down.

[0150] When the first seal portion 726c is inserted into the fourth discharge path 714, the first seal portion 726c seals the fourth discharge path 714, and closes the communication between the fourth discharge path 714 and the second combined discharge path 716.

[0151] When the first seal portion 726c is not inserted into the fourth discharge path 714, the first seal portion 726c does not seal the fourth discharge path 714, and the communication state between the fourth discharge path 714 and the second junction discharge path 716 is "open."

[0152] The second seal portion 726d is provided below the first seal portion 726c. The second seal portion 726d is held by the fourth water draining portion 726 and inserted into the reduced diameter portion 716a of the second merging and discharging channel 716. The reduced diameter portion 716a is provided below the point where the third discharge channel 713 is connected to the second merging and discharging channel 716. The second seal portion 726d switches the communication state between the second merging and discharging channel 716 and the outside by moving the fourth water draining portion 726 up and down.

[0153] When the second seal portion 726d is inserted into the reduced diameter portion 716a, the second seal portion 726d seals the reduced diameter portion 716a, and closes the communication between the second junction discharge path 716 and the outside.

[0154] When the second seal portion 726d is not inserted into the reduced diameter portion 716a, the second seal portion 726d does not seal the reduced diameter portion 716a, and the communication state between the second junction discharge channel 716 and the outside is "open."

[0155] In the fourth drain section 726, the timing of switching the communication state between the fourth discharge path 714 and the second merging discharge path 716 by the first seal section 726c is different from the timing of switching the communication state between the second merging discharge path 716 and the outside by the second seal section 726d.

[0156] For example, when the fourth water draining section 726 is moved downward so that each communication state changes from "closed" to "open," first, the communication state between the second merging and discharging passage 716 and the outside by the second sealing section 726d becomes "open." Furthermore, when the fourth water draining section 726 is moved downward, the communication state between the fourth discharging passage 714 and the second merging and discharging passage 716 by the first sealing section 726c becomes "open."

[0157] Furthermore, when the fourth water draining section 726 is moved upward so that each communication state changes from "open" to "closed," first, the communication state between the fourth discharge path 714 and the second merging discharge path 716 by the first seal portion 726c becomes "closed." Furthermore, when the fourth water draining section 726 is moved upward, the communication state between the second merging discharge path 716 and the outside by the second seal portion 726d becomes "closed."

[0158] Next, the flow of hot and cold water in flow path unit 70 when hot and cold water is discharged from water discharger 2 (for example, hand shower 11) will be explained using Figures 12 and 13. Figure 12 is a diagram showing the flow of hot and cold water in flow path unit 70 when water is discharged from hand shower 11. Figure 13 is a diagram showing the flow of hot and cold water in flow path unit 70 when water is discharged from hand shower 11. In Figures 12 and 13, the flow of water is indicated by dashed arrows, the flow of hot water is indicated by dashed arrows, and the flow of mixed water is indicated by solid arrows.

[0159] When hot or cold water is discharged from the water discharger 2, the communication state of the bypass flow path 710 is "closed." Furthermore, in the first water draining section 723, the communication state of the water drain hole 700a with the outside is "closed." Furthermore, in the second water draining section 724, the communication state of the water drain hole 701a with the outside is "closed." Furthermore, in the third water draining section 725, the communication state of the first discharge path 711 with the first merging discharge path 715 is "closed," and the communication state of the first merging discharge path 715 with the outside is "closed." Furthermore, in the fourth water draining section 726, the communication state of the third discharge path 713 with the second merging discharge path 716 is "closed," and the communication state of the second merging discharge path 716 with the outside is "closed."

[0160] Water supplied from water supply source 81 (see FIG. 3) flows through water supply path 700 and into hot and cold water mixing section 50 (see FIG. 7). Hot water supplied from hot water supply source 80 (see FIG. 3) flows through hot water supply path 701 and into hot and cold water mixing section 50. Mixed water obtained by mixing cold and hot water by hot and cold water mixing section 50 flows into hot and cold water inflow path 702. The mixed water that flows into hot and cold water inflow path 702 flows upward and into hot and cold water switching path 702a.

[0161] The mixed water that has flowed into hot / cold water switching channel 702a flows into hand shower supply channel 704, and is discharged from hand shower 11 (see FIG. 1) via the hand shower supply pipe.

[0162] When hot and cold water is discharged from the water discharger 2, the flow paths of the flow path unit 70 are formed so that the hot and cold water mainly flows upward from the upstream side to the downstream side.

[0163] Next, the flow of hot and cold water when draining water from the flow path unit 70 will be explained using Figures 14 and 15. Figure 14 is a diagram showing the flow of hot and cold water in the flow path unit 70 when draining water. Figure 15 is a diagram showing the flow of hot and cold water in the flow path unit 70 when draining water. In Figures 14 and 15, the flow of hot and cold water is indicated by solid arrows. Draining water is performed, for example, to prevent freezing in the faucet device 1.

[0164] When draining the flow path unit 70, the stop valves 84 and 85 are closed, hot water is not supplied from the hot water supply source 80, and cold water is not supplied from the water supply source 81.

[0165] When opening / closing operation unit 722 is operated and the communication state of bypass flow path 710 becomes "open," bypass flow path 710 communicates with water supply path 700. In other words, hand shower supply path 704 communicates with water supply path 700. Specifically, hand shower supply path 704 downstream of second solenoid valve 32 communicates with water supply path 700.

[0166] In addition, when the first draining portion 723 is operated, the communication state between the draining hole 700a and the outside becomes "open", and hot and cold water in the water supply passage 700 is discharged to the outside. is operated, and the communication state of bypass flow path 710 is "open," so hot and cold water in hand shower supply path 704 is discharged to the outside via bypass flow path 710 and water supply path 700. Hot and cold water from hand shower 11 (see FIG. 1) and the hand shower supply pipe, etc., is also discharged to the outside via bypass flow path 710 and water supply path 700. Hot and cold water in mixer faucet unit 20 (see FIG. 7) is also discharged to the outside via water supply path 700. Hot and cold water in supply paths 703-706 upstream of solenoid valves 31-34 and in hot and cold water inlet path 702 is also discharged to the outside via mixer faucet unit 20 and water supply path 700.

[0167] When second drain section 724 is operated and the communication state between drain hole 701a and the outside is set to "open," hot water in hot water supply channel 701 is drained to the outside. Also, hot and cold water in mixer faucet unit 20 is drained to the outside via hot water supply channel 701. Also, hot and cold water in each of supply channels 703-706 upstream of each solenoid valve 31-34 and in hot and cold water inlet channel 702 is drained to the outside via mixer faucet unit 20 and hot water supply channel 701.

[0168] When the third water drain section 725 is operated and the communication state between the first combined discharge path 715 and the outside becomes "open", the hot and cold water in the hot and cold water inlet path 702 is discharged to the outside via the second discharge path 712 and the first combined discharge path 715.

[0169] Furthermore, when the third drain section 725 is operated and the communication state between the first combined discharge channel 715 and the first discharge channel 711 becomes "open," the faucet supply channel 703, the first discharge channel 711, and the first combined discharge channel 715 are connected to each other. Specifically, the faucet supply channel 703 downstream of the second solenoid valve 32, the first discharge channel 711, and the first combined discharge channel 715 are connected to each other. As a result, hot and cold water in the faucet supply channel 703 is discharged to the outside via the first discharge channel 711 and the first combined discharge channel 715. Hot and cold water in the faucet supply pipe, etc., is also discharged to the outside via the first discharge channel 711 and the first combined discharge channel 715.

[0170] When fourth water draining section 726 is operated and communication between second combined discharge channel 716 and the outside is opened, hot and cold water in overhead shower supply channel 705 is discharged to the outside via third discharge channel 713 and second combined discharge channel 716. Specifically, hot and cold water in overhead shower supply channel 705 downstream of third solenoid valve 33 is discharged to the outside via third discharge channel 713 and second combined discharge channel 716. Furthermore, when communication between second combined discharge channel 716 and the outside is opened, hot and cold water from overhead shower 12 (see FIG. 1 ), the overhead shower supply pipe, etc. is discharged to the outside via third discharge channel 713 and second combined discharge channel 716.

[0171] Furthermore, when the fourth water draining section 726 is operated and the communication state between the second junction discharge channel 716 and the fourth discharge channel 714 becomes "open," hot and cold water in the worm pillar supply channel 706 is discharged to the outside via the fourth discharge channel 714 and the second junction discharge channel 716. Specifically, hot and cold water in the worm pillar supply channel 706 downstream of the fourth solenoid valve 34 is discharged to the outside via the fourth discharge channel 714 and the second junction discharge channel 716. Furthermore, when the communication state between the second junction discharge channel 716 and the fourth discharge channel 714 becomes "open," hot and cold water from the worm pillar 13 (see FIG. 1 ), the worm pillar supply pipe, etc. is discharged to the outside via the fourth discharge channel 714 and the second junction discharge channel 716.

[0172] The control device 7 may also have a water draining mode (residual water draining mode). The water draining mode is set by operating the remote control 4 or the external device 89, and is executed during the water draining process described above. In the water draining mode, the temperature control valve 210 is driven by the motor 51 (actuator) that operates the mixer faucet unit 20. For example, the temperature control valve 210 is driven to reciprocate left and right multiple times. In the water draining mode, the flow adjustment valve 230 is driven by the motor 61 (actuator) that operates the mixer faucet unit 20. For example, the flow adjustment valve 230 is rotated so that its direction of rotation changes multiple times.

[0173] This allows the faucet device 1 to discharge hot and cold water from the mixer faucet unit 20 to the outside via the water supply path 700 or the hot water supply path 701, thereby reducing the amount of hot and cold water remaining in the mixer faucet unit 20.

[0174] When stop valve 85 is open and water is being supplied from water supply source 81 to water supply passage 700, opening / closing operation unit 722 can be manually operated to open bypass passage 710, causing water to flow from water supply passage 700 into hand shower supply passage 704 via bypass passage 710. This allows faucet device 1 to discharge water from hand shower 11 without going through mixer faucet unit 20. Therefore, faucet device 1 can cause water to discharge from hand shower 11, for example, even during a power outage.

[0175] The faucet device 1 comprises multiple water outlets 2 and a faucet main body 3 that supplies hot and cold water to the water outlets 2 and is housed in the first counter 1002. The faucet main body 3 comprises a mixing faucet unit 20 that can mix hot and cold water, and a water outlet switching unit 30 that switches the destination of the hot and cold water. The water outlet switching unit 30 is provided above the mixing faucet unit 20.

[0176] This allows the faucet device 1 to house the faucet body 3 in the first counter 1002 while preventing the faucet body 3 from becoming too long in the left-right direction, preventing it from interfering with other components. Furthermore, workers can easily access the water discharge switching unit 30 when performing maintenance on the water discharge switching unit 30. Therefore, the faucet device 1 can improve the maintainability of the water discharge switching unit 30 housed in the first counter 1002.

[0177] The faucet device 1 also includes a control device 7 that controls the mixer faucet unit 20 and the water discharge switching unit 30. The control device 7 is provided forward of the mixer faucet unit 20 and the water discharge switching unit 30. The mixer faucet unit 20 and the water discharge switching unit 30 are provided so that they at least partially overlap when viewed from above.

[0178] As a result, the faucet device 1 can shorten the length of the wiring connecting the mixer faucet unit 20 and the water discharge switching unit 30 to the control device 7, thereby reducing electrical noise to the control device 7. Furthermore, even if the control device 7 is positioned forward of the mixer faucet unit 20 and the water discharge switching unit 30, the mixer faucet unit 20 and the water discharge switching unit 30 are arranged so that they at least partially overlap when viewed from above, so the length of the faucet device 1 in the front-to-back direction is prevented from becoming longer.

[0179] Furthermore, faucet device 1 includes, for example, water supply channel 700, which is a channel upstream of water discharge switching unit 30, hand shower supply channel 704, which is a channel downstream of water discharge switching unit 30, bypass channel 710, which connects water supply channel 700 and hand shower supply channel 704 across mixer faucet unit 20, opening / closing operation unit 722, which switches the communication state of bypass channel 710, and first water drain unit 723, which switches the communication state of drain hole 700a formed in water supply channel 700 with the outside. The connection point between water supply channel 700 and bypass channel 710, and the connection point between hand shower supply channel 704 and bypass channel 710 are located at a higher position than drain hole 700a.

[0180] This allows faucet device 1 to drain hot and cold water from hand shower supply path 704 downstream of water discharge switching unit 30 via bypass flow path 710 and water supply path 700. Faucet device 1 can drain hot and cold water from hand shower supply path 704 without passing through mixer faucet unit 20. Therefore, by locating water discharge switching unit 30 above mixer faucet unit 20, faucet device 1 can easily drain hot and cold water from hand shower supply path 704 downstream of water discharge switching unit 30.

[0181] Moreover, all of the bypass flow paths 710 are provided at a position higher than the location where the drain holes 700a are provided.

[0182] This allows the faucet device 1 to drain hot and cold water without leaving any hot or cold water in the bypass flow path 710.

[0183] The faucet device 1 also includes an overhead shower supply path 705, which is a flow path downstream of the water discharge switching unit 30, a warm pillar supply path 706, which is a flow path downstream of the water discharge switching unit 30 and is different from the overhead shower supply path 705, a third discharge path 713 connected to the overhead shower supply path 705, a fourth discharge path 714 connected to the warm pillar supply path 706, and a fourth water drainage unit 726 that switches the communication state with the outside between the third discharge path 713 and the fourth discharge path 714.

[0184] As a result, the faucet device can drain hot and cold water from the overhead shower supply channel 705 and the warm pillar supply channel 706 by operating the fourth water draining section 726. This allows the user to easily perform the water draining operation.

[0185] Furthermore, for example, the fourth water draining section 726 includes a first seal section 726c that switches the communication state between the third discharge channel 713 and the fourth discharge channel 714, and a second seal section 726d that switches the communication state between the fourth discharge channel 714 and the outside. The timing at which the communication state is switched by the first seal section 726c is different from the timing at which the communication state is switched by the second seal section 726d.

[0186] This allows the faucet device 1 to switch the communication state using the fourth drain section 726 with little force.

[0187] (Second embodiment) Next, a water faucet device 1100 according to a second embodiment will be described with reference to Figures 16 to 19. Here, differences from the first embodiment will be described. Figure 16 is a plan view showing a mixer faucet unit 1110 and part of a flow path unit 1120 according to the second embodiment. Figure 17 is a perspective view taken along the line XVI-XVI in Figure 16. Figure 18 is a perspective view of a shaft 1140. Figure 19 is a cross-sectional view showing part of a flow path unit 1120 taken along the line XIX-XIX in Figure 16. The water faucet device 1100 according to the second embodiment differs in the method of draining water from the faucet supply path 703, hand shower supply path 704, overhead shower supply path 705, and warm pillar supply path 706.

[0188] The flow path unit 1120 includes a first discharge path 1121, a second discharge path 1122, a third discharge path 1123, a fourth discharge path 1124, and a junction discharge path 1125. The flow path unit 1120 also includes a first selector valve 1130, a second selector valve 1131, a third selector valve 1132, and a fourth selector valve 1133. The flow path unit 1120 also includes a shaft 1140, a motor 1141, a handle 1142, and a spindle 1143. The first selector valve 1130, the second selector valve 1131, the third selector valve 1132, the fourth selector valve 1133, the shaft 1140, the motor 1141, the handle 1142, the spindle 1143, and a torsion spring 1155 (described later) configure a water drainage operation unit (second water drainage operation unit).

[0189] The first discharge path 1121 connects the faucet supply path 703 and the combined discharge path 1125. The first discharge path 1121 has a bottom, and a hole 1121b is formed in the bottom 1121a. A first switching valve 1130 is provided in the first discharge path 1121.

[0190] Second discharge path 1122 connects hand shower supply path 704 and joint discharge path 1125. Second discharge path 1122 has a bottom, and hole 1122b is formed in bottom 1122a. Second discharge path 1122 is provided with second switching valve 1131.

[0191] The third discharge path 1123 connects the overhead shower supply path 705 and the combined discharge path 1125. The third discharge path 1123 has a bottom, and a hole 1123b is formed in the bottom 1123a. A third switching valve 1132 is provided in the third discharge path 1123.

[0192] The fourth discharge path 1124 connects the worm pillar supply path 706 and the junction discharge path 1125. The fourth discharge path 1124 has a bottom, and a hole 1124b is formed in the bottom 1124a. A fourth switching valve 1133 is provided in the fourth discharge path 1124.

[0193] The merging and discharging path 1125 includes a merging path 1125a and a discharging path 1125b. The merging path 1125a is provided so as to extend in the left-right direction. A motor 1141 is provided at one end of the merging path 1125a via a spindle 1143. A handle 1142 is provided at the other end of the merging path 1125a. The discharging path 1125b is connected to the merging path 1125a and is provided so as to extend downward from the merging path 1125a. The lower end of the discharging path 1125b is open.

[0194] The first switching valve 1130 is slidable in the vertical direction relative to the first discharge path 1121. The first switching valve 1130 is biased toward the bottom 1121a by a spring 1130a. The first switching valve 1130 has a protruding pin 1130b that is inserted into a hole 1121b of the first discharge path 1121. The protruding pin 1130b is provided so as to protrude into the merged discharge path 1125. A seal portion 1130c is provided on the base end side of the protruding pin 1130b. The first switching valve 1130 switches the communication state between the first discharge path 1121 and the outside.

[0195] The second switching valve 1131 is slidable in the vertical direction relative to the second discharge path 1122. The second switching valve 1131 is biased toward the bottom 1122a by a spring 1131a. The second switching valve 1131 has a protruding pin 1131b that is inserted into a hole 1122b of the second discharge path 1122. The protruding pin 1131b is provided so as to protrude into the merged discharge path 1125. A seal portion 1131c is provided on the base end side of the protruding pin 1131b. The second switching valve 1131 switches the communication state between the second discharge path 1122 and the outside.

[0196] The third switching valve 1132 is slidable in the vertical direction relative to the third discharge path 1123. The third switching valve 1132 is biased toward the bottom 1123a by a spring 1132a. The third switching valve 1132 has a protruding pin 1132b that is inserted into a hole 1123b of the third discharge path 1123. The protruding pin 1132b is arranged to protrude into the merged discharge path 1125. A seal portion 1132c is provided on the base end side of the protruding pin 1132b. The third switching valve 1132 switches the communication state between the third discharge path 1123 and the outside.

[0197] The fourth switching valve 1133 is slidable in the vertical direction relative to the fourth discharge path 1124. The fourth switching valve 1133 is biased toward the bottom 1124a by a spring 1133a. The fourth switching valve 1133 has a protruding pin 1133b that is inserted into a hole 124b of the fourth discharge path 1124. The protruding pin 1133b is arranged to protrude into the merged discharge path 1125. A seal portion 1133c is provided on the base end side of the protruding pin 1133b. The fourth switching valve 1133 switches the communication state between the fourth discharge path 1124 and the outside.

[0198] The shaft 1140 is inserted into the junction passage 1125a. The shaft 1140 is provided to extend in the left-right direction. A spindle 1143 is attached to one end of the shaft 1140. A handle 1142 is attached to the other end of the shaft 1140.

[0199] The shaft 1140 is rotatably supported in the junction path 1125a. The shaft 1140 includes a first cam 1150 and a second cam 1151. The first cam 1150 and the second cam 1151 protrude in the radial direction of the shaft 1140. Four pairs of the first cams 1150 and the second cams 1151 are provided. The first cams 1150 and the second cams 1151 are arranged at predetermined intervals along the rotation direction of the shaft 1140.

[0200] When the shaft 1140 rotates in the first direction from a preset neutral position, the first cam 1150 comes into contact with the protruding pins 1130b to 1133b of the switching valves 1130 to 1133, and pushes the protruding pins 1130b to 1133b upward.

[0201] When the shaft 1140 rotates from the neutral position in a second direction opposite to the first direction, the second cam 1151 abuts against the protruding pins 1130b to 1133b of the switching valves 1130 to 1133, and pushes the protruding pins 1130b to 1133b upward.

[0202] In this way, the shaft 1140 operates each of the switching valves 1130 to 1133 by rotating.

[0203] Furthermore, shaft 1140 has, at one end thereof, protruding portion 1152 that protrudes in the radial direction. Shaft 1140 also has engaging portion 1153 that is provided radially outward of protruding portion 1152. When shaft 1140 rotates from the neutral position, engaging portion 1153 comes into contact with one arm of torsion spring 1155, causing the one arm of torsion spring 1155 to rotate. Note that the arm of torsion spring 1155 that engages engaging portion 1153 changes depending on the rotation direction of shaft 1140.

[0204] The spindle 1143 is connected to the rotation shaft of the motor 1141. The spindle 1143 has an engaging portion 1143a that can engage with the protrusion 1152. The spindle 1143 rotates together with the rotation shaft of the motor 1141.

[0205] The handle 1142 is provided to rotate together with the shaft 1140. The handle 1142 is provided to be manually operable by a user.

[0206] When the shaft 1140 is in the neutral position, the first cam 1150 and the second cam 1151 do not come into contact with the protruding pins 1130b to 1133b of the switching valves 1130 to 1133.

[0207] In this state, the switching valves 1130-1133 are not pushed upward, and the switching valves 1130-1133 close the holes 1121b-1124b of the discharge channels 1121-1124 with their seals 1130c-1133c. That is, the switching valves 1130-1133 are "closed." As a result, the faucet supply channel 703, hand shower supply channel 704, overhead shower supply channel 705, and warm pillar supply channel 706 do not communicate with the confluence discharge channel 1125.

[0208] When the shaft 1140 is rotated in the first direction from the neutral position by the motor 1141, the engaging portion 1143a of the spindle 1143 comes into contact with the protruding portion 1152 of the shaft 1140, and the shaft 1140 rotates in the first direction together with the spindle 1143. When the shaft 1140 rotates in the first direction, the first cam 1150 pushes up the protruding pins 1130b to 1133b of the switching valves 1130 to 1133.

[0209] As a result, each of the switching valves 1130-1133 moves upward against the biasing force of the springs 1130a-1133a. Then, each of the sealing portions 1130c-1133c moves away from the bottom portions 1123a-1124a. That is, each of the switching valves 1130-1133 opens. As a result, the faucet supply path 703, the hand shower supply path 704, the overhead shower supply path 705, and the warm pillar supply path 706 communicate with the junction discharge path 1125. Therefore, hot and cold water is discharged to the outside from the faucet supply path 703, the hand shower supply path 704, the overhead shower supply path 705, and the warm pillar supply path 706. In this way, first cam 1150 switches the communication state between faucet supply channel 703, hand shower supply channel 704, overhead shower supply channel 705, and worm pillar supply channel 706 and combined discharge channel 1125 by rotating shaft 1140. In other words, first cam 1150 switches the communication state between each of discharge channels 1121-1124 and combined discharge channel 1125 by rotating shaft 1140.

[0210] When the spindle 1143 is rotated in the second direction by the motor 1141 from a state in which the first cam 1150 has pushed up the protruding pins 1130b-1133b of the switching valves 1130-1133, the shaft 1140 rotates in the second direction and returns to the neutral position due to the return force of the torsion spring 1155. That is, the torsion spring 1155 biases the shaft 1140 to the neutral position in the second direction.

[0211] When the user rotates handle 1142 in the second direction from the neutral position of shaft 1140, shaft 1140 rotates in the second direction together with the rotation of handle 1142. When shaft 1140 rotates in the second direction from the neutral position, protrusion 1152 of shaft 1140 does not abut on engagement portion 1143a of spindle 1143. Therefore, the user can rotate shaft 1140 in the second direction without rotating the rotating shaft portion of motor 1141. When draining water by operating handle 1142, the user can easily perform the water draining operation.

[0212] As shaft 1140 rotates in the second direction, second cam 1151 pushes up protruding pins 1130b-1133b of switching valves 1130-1133. This connects faucet supply channel 703, hand shower supply channel 704, overhead shower supply channel 705, and warm pillar supply channel 706 to combined discharge channel 1125. As a result, hot and cold water is discharged to the outside from faucet supply channel 703, hand shower supply channel 704, overhead shower supply channel 705, and warm pillar supply channel 706, etc. In this way, second cam 1151 switches the communication state between faucet supply channel 703, hand shower supply channel 704, overhead shower supply channel 705, and warm pillar supply channel 706 and combined discharge channel 1125, depending on the rotation of shaft 1140. That is, the second cam 1151 switches the communication state between each of the discharge paths 1121 to 1124 and the combined discharge path 1125 by the rotation of the shaft 1140.

[0213] When the user releases the handle 1142 after the second cam 1151 has pushed up the protruding pins 1130b to 1133b of the switching valves 1130 to 1133, the shaft 1140 rotates in the first direction and returns to the neutral position due to the return force of the torsion spring 1155. That is, the torsion spring 1155 biases the shaft 1140 to the neutral position in the first direction.

[0214] The water drainage operation unit 1160 includes, for example, a first switching valve 1130 that switches the communication state between the first discharge path 1121 (first connection flow path) and the outside, a second switching valve 1131 that switches the communication state between the second discharge path 1122 (second connection flow path) and the outside, a shaft 1140 that operates the first switching valve 1130 and the second switching valve 1131 by rotating the shaft 1141, a motor 1141 that rotates the shaft 1140, and a handle 1142 that can manually operate the shaft 1140.

[0215] As a result, faucet device 1100 can use motor 1141 to drain, for example, hot and cold water from faucet supply channel 703 and hand shower supply channel 704 to the outside. This allows the user to easily perform water draining operations. Furthermore, faucet device 1100 can manually drain, for example, hot and cold water from faucet supply channel 703 and hand shower supply channel 704 to the outside. This allows faucet device 1100 to be manually drained, for example, during a power outage. Furthermore, because faucet device 1 can perform both motor-operated water draining operations and manual water draining operations using a single shaft 1140, faucet device 1 can be made smaller.

[0216] Furthermore, the motor 1141 rotates the shaft 1140, which connects the first discharge path 1121 and the second discharge path 1122 with the outside, in a first direction, and the handle 1142 rotates the shaft 1140, which connects the first discharge path 1121 and the second discharge path 1122 with the outside, in a second direction opposite to the first direction, and the water drainage operating unit 1160 is provided with a torsion spring 1155 that biases the shaft 1140 to a neutral position in the first direction and the second direction.

[0217] This allows faucet device 1100 to automatically return shaft 1140 to the neutral position, for example, when handle 1142 is released after draining water by operating handle 1142. Therefore, faucet device 1100 can return shaft 1140 to the neutral position, for example, even if the user forgets to return handle 1142. Even if the user forgets to return handle 1142, faucet device 1100 can prevent first discharge path 1121 and second discharge path 1122 from being maintained in a state of communication with the outside, for example.

[0218] In addition, the shaft 1140 is provided with a first cam 1150 and a second cam 1151 that protrude radially, and as the shaft 1140 rotates, the first cam 1150 comes into contact with each of the switching valves 1130-1133, thereby switching the state of communication between each of the discharge paths 1121-1124 and the outside, and the second cam 1151 comes into contact with each of the switching valves 1130-1133, thereby switching the state of communication between each of the discharge paths 1121-1124 and the outside.

[0219] As a result, the faucet device 1 can operate the switching valves 1130-1133 using the cams 1150, 1151 to switch the communication state between the discharge paths 1121-1124 and the outside.

[0220] Note that draining of water from at least one of faucet supply path 703, hand shower supply path 704, overhead shower supply path 705, and warm pillar supply path 706 may be performed by the method described below. Here, an example of draining water from faucet supply path 703 will be described.

[0221] An automatic open valve 1200 is provided in the faucet supply passage 703 (downstream flow passage) as shown in Fig. 20. Fig. 20 is a cross-sectional view of the vicinity of the faucet supply passage 703 according to the modified example, cut along a plane perpendicular to the left-right direction.

[0222] The automatic release valve 1200 is supported so as to be movable up and down by a second case 1202 fixed to a first case 1201 having a through-hole 1201a. Note that upward movement of the second case 1202 is restricted by a support member 1203 provided above. Also, a hole is formed in the second case 1202 to allow hot and cold water to flow into the second case 1202.

[0223] The automatic release valve 1200 has a downwardly projecting protrusion 1210 provided with a seal portion 1211. The automatic release valve 1200 is biased upward by the biasing force of a spring 1212.

[0224] When the biasing force of spring 1212 is greater than the force of the water pressure of hot and cold water in faucet supply passage 703, automatic open valve 1200 is pressed against second case 1202 by the biasing force of spring 1212. In this case, seal portion 1211 does not close through-hole 1201a, and automatic open valve 1200 is "open." Then, faucet supply passage 703 and first discharge passage 1121 communicate with each other, and hot and cold water in faucet supply passage 703 is discharged to the outside via first discharge passage 1121.

[0225] When the force of the water pressure of the hot and cold water in faucet supply passage 703 is greater than the biasing force of spring 1212, automatic open valve 1200 moves downward due to the force of the water pressure in faucet supply passage 703. In this case, seal portion 1211 closes through-hole 1201a, and automatic open valve 1200 is "closed." Then, faucet supply passage 703 and first discharge passage 1121 no longer communicate with each other, and the hot and cold water in faucet supply passage 703 is not discharged to the outside.

[0226] Spring 1212 is provided so that automatic open valve 1200 is closed by the water pressure when hot and cold water flows at the minimum flow rate in mixer faucet unit 20. In other words, when hot and cold water flows in faucet supply path 703, automatic open valve 1200 is closed, and when hot and cold water does not flow in faucet supply path 703, automatic open valve 1200 is open.

[0227] In this way, by providing the automatic release valve 1200, it is possible to automatically switch the discharge of water from the faucet supply passage 703 depending on whether or not water is being discharged from the faucet 10.

[0228] <Additional Notes> (1) A plurality of water outlets; a faucet body that supplies hot and cold water to the water outlet portion and is housed in a concealing member; Equipped with The faucet body is a mixing faucet unit capable of mixing hot water and cold water; A water outlet switching unit that switches the hot and cold water outlet Equipped with The water discharge switching unit is provided above the mixer faucet unit. (2) A control device for controlling the mixing faucet unit and the water discharge switching unit Equipped with The control device is provided forward of the mixing faucet unit and the water discharge switching unit, The faucet device according to (1), wherein the mixing faucet unit and the water discharge switching section are arranged so as to overlap at least partially when viewed from above. (3) an upstream flow path upstream of the water discharge switching unit; a downstream flow path downstream of the water discharge switching unit; a bypass flow path connecting the upstream flow path and the downstream flow path across the mixing faucet unit; an opening / closing operation unit for switching the communication state of the bypass flow path; a first drainage operation unit that switches a state of communication between a drainage hole formed in the upstream flow path and the outside; Equipped with A faucet device as described in (1) or (2), wherein the connection point between the upstream flow path and the bypass flow path, and the connection point between the downstream flow path and the bypass flow path are located at a higher position than the drain hole. (4) The faucet device according to (3), wherein all of the bypass flow paths are provided at a higher position than the location where the drain hole is provided. (5) The water discharge switching unit is provided downstream of the mixing faucet unit, the upstream flow path is a water supply path that supplies water to the mixing faucet unit, The water faucet device according to (3) or (4), wherein the opening and closing operation unit can be manually operated. (6) an actuator for operating the mixing faucet unit; a control device that controls the mixing faucet unit and the water discharge switching unit; Equipped with The faucet device according to any one of (1) to (5), wherein the control device has a residual water drain mode in which the actuator is operated to drain residual water from the mixer faucet unit. (7) a first downstream flow path downstream of the water discharge switching unit; a second downstream flow path that is downstream of the water discharge switching unit and different from the first downstream flow path; a first connecting flow path connected to the first downstream flow path; a second connecting flow path connected to the second downstream flow path; a second drainage operation unit that switches the communication state between the first connection flow path and the second connection flow path and the outside; The faucet device according to any one of (1) to (6), comprising: (8) The second water draining operation unit is a first seal portion that switches a communication state between the first connection flow path and the second connection flow path; a second seal portion that switches a communication state between the second connection flow path and the outside; Equipped with The faucet device according to (7), wherein the timing at which the communication state is switched by the first seal portion and the timing at which the communication state is switched by the second seal portion are different. (9) The second water draining operation unit is a first switching valve that switches a communication state between the first connection flow path and the outside; a second switching valve that switches a communication state between the second connection flow path and the outside; a shaft that operates the first switching valve and the second switching valve by a rotational movement; a motor that rotates the shaft; The shaft is connected to a manually operable handle. The faucet device according to (7) above, (10) a rotation direction of the shaft by the motor that connects the first connection flow path and the second connection flow path with the outside is a first direction, and a rotation direction of the shaft by the handle that connects the first connection flow path and the second connection flow path with the outside is a second direction opposite to the first direction, The faucet device according to (9), wherein the second draining operation part is provided with a biasing spring that biases the shaft to a neutral position in the first direction and the second direction. (11) The shaft includes a first cam and a second cam that protrude radially, A faucet device as described in (9) or (10), in which the rotation of the shaft causes the first cam to contact each switching valve, thereby switching the state of communication between the first connection flow path and the second connection flow path and the outside, and the second cam to contact each switching valve, thereby switching the state of communication between the first connection flow path and the second connection flow path and the outside. (12) a downstream flow path that is a flow path downstream of the water discharge switching unit; a discharge flow path connected to the downstream flow path and communicating with the outside; a switching valve that switches a communication state between the downstream flow path and the discharge flow path; Equipped with The switching valve is The faucet device according to any one of (1) to (11), which is an automatic open valve that closes when hot or cold water flows in the downstream flow path and opens when hot or cold water does not flow in the downstream flow path.

[0229] Further advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. [Explanation of symbols]

[0230] 1. 1100 Faucet equipment 2. Water outlet 3 Faucet body 4 Remote Control 7 Control Device 20 Mixing faucet unit 30 Water outlet switching section 50 Hot water mixing section 51 Motor (actuator) 60 Flow rate adjustment section 61 Motor (actuator) 70, 1120 flow path unit 700 Water supply path (upstream flow path) 700a drain hole 703 Containment channel (downstream flow channel) 704 Hand shower supply channel (downstream channel) 705 Overhead shower supply channel (first downstream channel) 706 Worm pillar supply channel 710 Bypass flow path 713 Third discharge channel (first connecting channel) 714 4th discharge channel (2nd connection channel) 722 Opening and closing operation part 723 First water draining section (first water draining operation section) 726 4th water draining section (2nd water draining operation section) 726c First seal part 726d Second seal part 1121 First discharge channel (first connection channel) 1122 Second discharge channel (second connection channel) 1130 First switching valve 1131 Second switching valve 1140 Shaft 1141 Motor 1142 Handle 1150 First Cam 1151 Second Cam 1155 Torsion spring (bias spring) 1200 Automatic release valve

Claims

1. A plurality of water outlets; a faucet body that supplies hot and cold water to the water outlet portion and is housed in a concealing member; Equipped with The faucet body is a mixing faucet unit capable of mixing hot water and cold water; A water outlet switching unit that switches the hot and cold water outlet Equipped with The water discharge switching unit is provided above the mixer faucet unit.

2. A control device for controlling the mixing faucet unit and the water discharge switching unit Equipped with The control device is provided forward of the mixing faucet unit and the water discharge switching unit, The water faucet device according to claim 1 , wherein the mixer faucet unit and the water discharge switching section are arranged so as to at least partially overlap each other when viewed from above.

3. an upstream flow path upstream of the water discharge switching unit; a downstream flow path downstream of the water discharge switching unit; a bypass flow path connecting the upstream flow path and the downstream flow path across the mixing faucet unit; an opening / closing operation unit for switching the communication state of the bypass flow path; a first drainage operation unit that switches a state of communication between a drainage hole formed in the upstream flow path and the outside; Equipped with The water faucet device according to claim 1, wherein a connection point between the upstream flow path and the bypass flow path and a connection point between the downstream flow path and the bypass flow path are provided at a position higher than the drain hole.

4. The water faucet device according to claim 3 , wherein all of the bypass flow paths are provided at a position higher than a position where the drain hole is provided.

5. The water discharge switching unit is provided downstream of the mixing faucet unit, the upstream flow path is a water supply path that supplies water to the mixing faucet unit, The water faucet device according to claim 3 , wherein the opening / closing operation unit is manually operable.

6. an actuator for operating the mixing faucet unit; a control device that controls the mixing faucet unit and the water discharge switching unit; Equipped with The water faucet device according to claim 1 , wherein the control device has a residual water drain mode in which residual water in the mixer faucet unit is drained by operating the actuator.

7. a first downstream flow path downstream of the water discharge switching portion; a second downstream flow path that is downstream of the water discharge switching unit and different from the first downstream flow path; a first connecting flow path connected to the first downstream flow path; a second connecting flow path connected to the second downstream flow path; a second drainage operation unit that switches communication states of the first connection flow path and the second connection flow path with the outside; The water faucet device according to claim 1 , comprising:

8. The second water draining operation unit is a first seal portion that switches a communication state between the first connection flow path and the second connection flow path; a second seal portion that switches a communication state between the second connection flow path and the outside; Equipped with The water faucet device according to claim 7 , wherein the timing at which the communication state is switched by the first seal portion is different from the timing at which the communication state is switched by the second seal portion.

9. The second water draining operation unit is a first switching valve that switches a communication state between the first connection flow path and the outside; a second switching valve that switches a communication state between the second connection flow path and the outside; a shaft that operates the first switching valve and the second switching valve by a rotational movement; a motor that rotates the shaft; The shaft is connected to a manually operable handle. The water faucet device according to claim 7, comprising:

10. a rotation direction of the shaft by the motor that connects the first connection flow path and the second connection flow path with the outside is a first direction, and a rotation direction of the shaft by the handle that connects the first connection flow path and the second connection flow path with the outside is a second direction opposite to the first direction, The second water draining operation unit includes a biasing spring that biases the shaft to a neutral position in the first direction and the second direction. The water faucet device according to claim 9.

11. The shaft includes a first cam and a second cam that protrude radially, The faucet device described in claim 9, wherein, as the shaft rotates, the first cam contacts each switching valve, thereby switching the communication state between the first connection flow path and the second connection flow path and the outside, and the second cam contacts each switching valve, thereby switching the communication state between the first connection flow path and the second connection flow path and the outside.

12. a downstream flow path that is a flow path downstream of the water discharge switching unit; a discharge flow path connected to the downstream flow path and communicating with the outside; a switching valve that switches a communication state between the downstream flow path and the discharge flow path; Equipped with The switching valve is The water faucet device according to claim 1, wherein the automatic release valve closes when hot or cold water flows through the downstream flow path and opens when hot or cold water does not flow through the downstream flow path.

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