JP2002266387A - Remaining warm water conveying equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide technique for utilizing the whole of the remaining warm water in a bathtub as washing water. SOLUTION: The remaining warm water conveying equipment is provided at the bottom portion of a bathtub 26 and has a drain valve 22 draining the remaining warm water from the bathtub 26 to a drainage 72 when the equipment is opened, a water stop valve 24 installed in the downstream of the drain valve 22, a piping connecting the bathtub 26 to the a washing machine 62 with one end set to communicate with a bathtub drainage 72 between the drain valve 22 and the water stop valve 24 with the other end set to communicate with a water filling hole 56 to the washing machine, and a controller 14 operating the pimp by opening the pump inserted to the middle of the piping and the drain valve 22 and closing the water stop valve 24. The drain valve 22 of this remaining warm water conveying equipment having the configuration as stated above is opened by the controller 14, the water stop valve 24 is closed, an when the pump is operated, the remaining warm water inside the bathtub 26 is conveyed to the water filling hole 56 through the piping of the drain plug 22 and the bathtub drainage 72. Since the drain valve 22 is provided at the bottom portion of the bathtub 26, the remaining warm water in the bathtub 26 is all conveyed to the washing machine 62.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an apparatus for feeding remaining hot water in a bathtub to a washing machine.

[0002]

2. Description of the Related Art The technology for reheating hot water in a bathtub has become widespread. Between the automatic hot water supply device and the bathtub, the hot water in the bathtub is sucked into the automatic hot water supply device, and reheated in the automatic hot water supply device.
A pipe is provided to send the reheated hot water back to the bathtub. For this purpose, the side wall of the bathtub is provided with a port (suction port) for sending out hot water to the automatic hot water supply apparatus and a port (supply port) for receiving hot water from the automatic hot water supply apparatus. A pump for circulating water is installed. 2. Description of the Related Art There is known a remaining hot water supply device that uses an automatic hot water supply device to supply remaining hot water in a bathtub to a washing machine. In this technique, the remaining hot water in the bathtub is sucked out to the automatic hot water supply device by using the above-mentioned suction port for reheating, and the remaining hot water sucked out to the automatic hot water supply device is sent to the water inlet of the washing machine.

[0003]

The conventional remaining hot water supply device is provided on the side wall of the bath tub in both the case where the hot water in the bath tub is reheated and the case where the remaining hot water in the bath tub is fed to the washing machine. Use the outlet. Therefore, when the level of the remaining hot water becomes lower than the suction port, the remaining hot water cannot be sent to the washing machine. That is, only a part of the remaining hot water in the bathtub can be used as washing water, and the remaining hot water that cannot be used has to be drained, which is wasted.

[0004] The present invention has been made to solve such a problem, and has as its object to provide a technique capable of using all remaining hot water in a bathtub as washing water.

[0005]

Means for Solving the Problems and Action and Effect The remaining hot water supply device of the present invention is provided at the bottom of the bathtub and drains the remaining hot water in the bathtub to a drainage channel when opened, A water stop valve provided in a drainage channel downstream of the tap,
A pipe connecting the washing machine to the bathtub having one end communicating with the drainage passage between the drain cock and the water stop valve and the other end communicating with the washing machine inlet, a pump inserted in the middle of the pipe, and a drain cock And a controller for closing the water stop valve and operating the pump. When the drain plug is opened by the controller, the water stop valve is closed, and the pump is operated, the remaining hot water in the bathtub passes through the drain plug, the drain passage, and the piping. Water is sent to the water inlet of the washing machine. Since the drain plug is provided at the bottom of the bathtub, all of the remaining hot water in the bathtub can be sent to the washing machine.

[0006] In the case of this water supply device, it is preferable that the controller has a program for stopping the pump when the water inlet of the washing machine is closed. In this case, since the pump is stopped when the washing machine is full and the washing machine water inlet is closed, wasteful operation of the pump even after the washing machine is full is prevented.

[0007] It is also preferable that the controller has a program for opening the water stop valve when the washing machine water inlet is closed. In this case, when the washing machine is full and the washing machine inlet is closed, the water stop valve is automatically opened. Therefore, when the remaining hot water has been sent to the washing machine, the remaining hot water in the bathtub is automatically drained.

[0008] A second drainage channel is branched from a position downstream of a pump connected to a pipe connecting the bathtub and the washing machine, and a second drainage plug is provided for opening and closing the second drainage channel. It is preferable to provide a program for opening the drain cock. In this case, at the time of rapid drainage, in addition to draining the remaining hot water in the bathtub through the water stop valve, the second drain plug is opened and the remaining hot water is drained from the second drainage channel. For this reason, the remaining hot water in the bathtub can be quickly drained.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The remaining hot water supply device of the present invention can be suitably implemented in the following forms. (Mode 1) In the automatic water heater according to claim 1,
The piping connecting the bathtub and the washing machine connects the bathtub and the washing machine through a water heater and a pouring unit. (Mode 2) A third drainage channel is branched from a pipe connecting the suction port of the bathtub and the automatic hot water supply device, and a third drainage plug is provided in the third drainage channel. Sometimes we have a program to open a third drain plug. By employing a configuration in which drainage is performed also from the suction port, the remaining hot water in the bathtub can be more rapidly drained.

[0010]

Embodiment An embodiment of the remaining hot water supply apparatus according to the present invention will be described. First, regarding the configuration of the automatic water heater 10,
This will be described with reference to FIG. The automatic water heater 10 includes a water heater 11, a pouring unit 12, a controller 14, a drain plug 22, a water stop valve 24, and the like, and a pipe, a hose, and the like that communicate these components. FIG. 1 illustrates a state in which automatic hot water supply apparatus 10 is placed in a “standby state” (described later). The water heater 11 includes a gas combustor (not shown),
Built-in heat exchanger, pump, etc. The water heater 11 includes a water supply port 11a connected to the water pipe 27, a water supply port 11b for supplying hot water to the water supply pipe 28, and a suction pipe 32 and a drain pipe 76 for supplying hot water (or remaining hot water) in the bathtub 26 (patented). It has a suction port 11c that sucks in via a third water distribution channel (a third water distribution channel described in the claims) and a return port 11d that discharges hot water (or remaining hot water) sucked from the suction port 11c to the return pipe 33. Water inlet 11
The tap water supplied to “a” is heated by a gas combustor and a heat exchanger (not shown) and is supplied to a tapping pipe 28. Hot water pipe 2
The hot water discharged at 8 is supplied to a bathroom, a kitchen faucet, a shower or the like. The pump draws hot water from the bathtub 26, is reheated by a gas combustor and a heat exchanger as needed, and then supplies water from the return port 11d.

Tap water branched from the water pipe 27 is supplied to a water inlet 42 of the pouring unit 12. An inlet filter 43 is attached to the water inlet 42, and if the tap water contains dust, the dust is captured here. A governor 41 is mounted downstream of the water inlet 42. The governor 41 operates to close when the pressure difference between the upstream side and the downstream side exceeds a predetermined value, and has a function of limiting the flow rate.
Further, a water amount valve 44 is mounted downstream of the governor 41. The water amount valve 44 is a servo valve of a type in which a stepping motor rotates to adjust the opening degree of the valve. Water heater 11
The hot water discharged from the hot water supply pipe 28 is supplied to a faucet or the like in the bathroom, and is branched off on the way to the hot water inlet 45 of the pouring unit 12. A check valve 46 for preventing backflow from the pouring unit 12 to the water heater 11 is attached to the hot water inlet 45. Downstream of the hot water inlet 45, a hot water on-off valve 47 driven by a solenoid to open and close the flow of hot water is mounted.

A passage downstream of the water flow valve 44 and the hot water on-off valve 47 joins, and a check valve 48 for preventing backflow is mounted downstream of the joining portion. The downstream of the check valve 48 is branched, and a water flow sensor 52 for detecting whether or not there is a water flow is mounted in one of the branched passages. The water flow sensor 52 is turned on when there is a water flow, and is turned off when there is no water flow. A temperature sensor 53 is inserted and attached to a passage downstream of the water flow sensor 52. The temperature sensor 53 detects the temperature using the characteristics of a thermistor whose resistance changes according to the temperature. A switching valve B54 is mounted downstream of the temperature sensor 53. This switching valve B54 is
Switching between flowing the water flowing from the temperature sensor 53 to the washing machine 62 and draining the water is performed. Downstream of the flow path on the washing machine 62 side of the switching valve B54, a washing machine water injection valve 56 for switching between injection and stoppage of water into the washing machine 62 is mounted.
The washing machine water injection valve 56 is a component of the washing machine 62. The drainage side of the switching valve B54 is connected to the water stop valve 24 through a drainage pipe 69.
It is connected to a distribution pipe downstream of (described later).

On the other hand, a return pipe 33 connected to the return port 11d of the water heater 11 communicates with the switching valve A66.
The switching valve A66 supplies hot water (or remaining hot water) from the water heater 11
Switching is performed between the washing machine 62 side and the bathtub 26 side. Downstream of the branch of the switching valve A66 toward the washing machine 62, a filter 65 for trapping dust contained in the remaining hot water is mounted, and further downstream there is mounted a remaining hot water opening / closing valve 67. The remaining hot water on-off valve 67 is driven by a solenoid to open and close the flow of the remaining hot water. The downstream of the remaining hot water on-off valve 67 merges with the above-mentioned downstream of the check valve 48. Also,
The branch of the switching valve A66 toward the bathtub 26 is communicated with a supply port 26a formed in the bathtub.

One end of a suction pipe 32 is connected to a suction port 26 b formed in the bathtub 26, and the other end communicates with a suction port 11 c of the water heater 11. In the middle of the suction pipe 32, a bathtub suction shutoff valve 74 is mounted. The bathtub suction shut-off valve 74 opens when water is flowing, but when air is sucked,
That is, when the pressure difference between the upstream side and the downstream side of the valve becomes small, the valve closes to prevent suction of air. A drain plug 22 is provided at the bottom of the bathtub 26, a drain pipe 72 is connected downstream of the drain plug 22, and a water stop valve 24 is mounted downstream of the drain pipe 72. Drain plug 22 and water stop valve 24
Have a function of opening and closing the flow of water by being driven by a solenoid. As described above, the drain pipe 69 communicating with the switching valve B54 is connected downstream of the water stop valve 24. The drain pipe 76 has one end connected to the middle of the drain pipe 72 and the other end connected to the suction pipe 32. In the middle of the drain pipe 76, a drain suction shutoff valve 77 is mounted. The drainage suction shutoff valve 77 is provided. It has the same internal configuration as the bathtub suction shut-off valve 74 described above, and is provided for the purpose of preventing suction of air.

The controller 14 comprises the components of the water heater 11 and the pouring unit 12 (water quantity valve 44, hot water on / off valve 47, remaining hot water on / off valve 67, water flow sensor 52, switching valve A66, switching valve B54, temperature sensor 53). , Drain plug 22, water stop valve 24
And a signal line (in FIG. 1 to FIG. 10, the signal line is shown by a chain line). The controller 14 has a CP
U, RAM, ROM, input processing circuit, output processing circuit,
It is composed of a BUS or the like that transmits information between them, processes input signals according to a predetermined program, and outputs them as control signals. This control signal controls the above-described pouring unit 12 and the like connected to the controller 14. Further, a remote controller 16 is connected to the controller 14 via a signal line. The remote controller 16 is used by a user to operate a selection switch to remotely control the pouring unit 12, the drain plug 22, and the like, and can select various operation modes of the automatic water heater 10. The operation modes relating to the water supply to the washing machine 62 include a “remaining hot water mode” in which the remaining hot water in the bathtub 26 is supplied, a “hot water mode” in which tap water is heated by the water heater 11 to generate hot water, and the hot water is supplied. There is a "water mode" in which tap water is sent as it is. In addition, as other modes, "hot water mode", "reheating mode",
There are "drain mode", "rapid drain mode", and the like. The remote controller 14 may be disposed in two locations, for example, a bathroom and a kitchen, with functions dispersed or overlapped in consideration of user's convenience.

Next, the operation of the automatic water heater 10 in each operation mode will be described with reference to FIGS. The automatic water heater 10 has a function of performing various operations. In the following description, operations relating to the reuse and drainage of remaining hot water in the bathtub according to the present invention will be described, and other operations ( The operation of the hot water filling mode or the like is not different from the generally known operation, and the description thereof is omitted.

(Standby mode) FIG. 1 shows a state (standby state) in which water (remaining hot water) is put into the bathtub 26, the washing machine water injection valve 56 is closed, and the selection switch of the remote controller 16 is set to the remaining hot water mode. It is a system diagram of the automatic hot-water supply apparatus 10. In this standby state, the water quantity valve 44 is opened, and the hot water on-off valve 47 and the remaining hot water on-off valve 67 are closed. The flow paths of the switching valve B54 and the switching valve A66 are switched to the washing machine 62 side and the bathtub 26 side, respectively. The drain plug 22 is closed, and the water stop valve 24 is open. Further, the water pressure of the water supply is applied to the water pipe 27.

(Remaining Hot Water Mode) When the washing machine injection valve 56 is opened in the standby mode shown in FIG. 1, the flow from the water pipe 27 to the washing machine 62 is increased as shown in FIG. A passage is formed, and water flows through this passage, and the water flow sensor 52 is turned on. When the water flow sensor 52 is turned on,
Automatic hot water supply device 10 determines that washing machine water injection valve 56 has been opened (in FIGS. 2 to 10, the remaining hot water and the portion where the water is flowing are indicated by “shading”). Water flow sensor 5
When 2 is turned on, as shown in FIG. 3, the water amount valve 44 is closed, the switching valve A66 switches the flow path to the filter 65 side, and the remaining hot water on-off valve 67 is opened. Drain tap 2
2 is opened, the water stop valve 24 is closed, and the pump of the water heater 11 starts operating. In this state, since the water stop valve 24 is closed, all of the remaining hot water that has flowed out of the drain plug 22 is sucked out of the branch of the drain pipe 72 by the pump of the water heater 11, and the switching valve A66 and the remaining hot water opening and closing are opened. Valve 67, switching valve B54
The water is sent to the washing machine 62 via the like. Check valve 48
Is attached, the remaining hot water does not flow backward to the water amount valve 44 or the hot water on-off valve 47 side. The remaining hot water in the bathtub 26 is also drawn out from the suction port 26b of the bathtub 26 and sent to the washing machine 62. The filter 65 captures dust contained in the remaining hot water sent to the washing machine 62. In addition,
In this state, the bathtub suction shutoff valve 74 and the drainage suction shutoff valve 7
7 is opened by the suction pressure of the pump of the water heater 11 to allow the remaining hot water to flow. In this way, the remaining hot water in the bathtub 26 is sucked out from the drain plug 22 and the suction port 26b, so that a large amount of the remaining hot water is sent to the washing machine 62 in a short time.

When the water supply to the washing machine 62 is further continued, the level of the remaining hot water in the bathtub 26 decreases and becomes lower than the suction port 26b. This state is shown in FIG.
Is shown in When the water level becomes lower than the suction port 26b, the suction port 26b sucks in the air, so that the pressure difference between the upstream and downstream of the bathtub suction shutoff valve 74 decreases, and upon detecting this, the bathtub suction shutoff valve 74 is closed. .
Even when the water level of the bathtub 26 becomes lower than the suction port 26b, the remaining hot water is sucked in from the drain plug 22 provided at the bottom of the bathtub 26, and the water supply to the washing machine 62 is continued.
That is, the thus configured automatic water heater 10
Since the remaining hot water is sucked from the drain plug 22, all the remaining hot water in the bathtub 26 can be used.

When the washing machine injection valve 56 is closed or the remaining hot water in the bathtub 26 is completely fed, the remaining hot water stops flowing through the pouring unit 12 and the water flow sensor 52 is turned off. When the water flow sensor 52 is turned off, the water heater 11
Is stopped, the water quantity valve 44 is opened, the remaining hot water opening / closing valve 67 is closed, and the switching valve A66 switches the flow path to the bathtub 26 side. When the water flow sensor 52 is kept off for a predetermined time (for example, three minutes), it is determined that the water supply to the washing machine 62 has been completed, and the remaining hot water on-off valve 67 is opened. When the remaining hot-water on-off valve 67 is opened, as shown in FIG. 5, water flows through the filter 65 in the direction of the bathtub 26, and is captured by the filter 65 when the water in the bathtub 26 is sent to the washing machine 62. Dust is washed away. The remaining hot water opening / closing valve 67 is closed after a predetermined time (for example, 15 seconds) has elapsed, and the washing of the dust on the filter 65 ends. When the water flow sensor 52 is turned on within a predetermined time, that is, when the washing machine water injection valve 56 is opened, the dust is not washed out from the filter 65, and the water is not supplied to the washing machine 62. Will be resumed.

(Hot water mode) When the selection switch of the remote controller 16 is operated to the hot water mode, the remaining hot water opening / closing valve 67 is closed and the hot water opening / closing valve 47 is opened. When the washing machine water injection valve 56 is opened in this state, as shown in FIG. 6, a flow path from the outlet 11b of the water heater 11 to the washing machine 62 is formed, and water flows through this flow path. The water flow sensor 52 is turned on. When the water flow sensor 52 is turned on, the gas combustor of the water heater 11 is operated, and the water supply port 1 of the water heater 11 is
1a is heated and the hot water 4 of the pouring unit 12 is heated.
5 Hot water supplied to the hot water inlet 45 flows through the hot water on-off valve 47. In addition, water is supplied from the water pipe 27 to the water inlet 42 of the pouring unit 12, mixed with the hot water flowing through the hot water opening / closing valve 47 after passing through the governor 41 and the water quantity valve 44. The governor 41 limits the flow rate of the water from the water pipe 27 so that the flow rate does not exceed a predetermined flow rate (do not flow too much). Hot water from hot water on-off valve 47 and water quantity valve 44
The temperature sensor 53 detects the temperature after the water has been mixed and sends it to the controller 14. Controller 14
Is a preset temperature (for example, 38 ° C.)
Is transmitted to the flow valve 44. The opening of the water quantity valve 44 is adjusted by this control signal, and the water quantity valve 4
The temperature after mixing the water flowing through the hot water 4 and the hot water flowing through the hot water on-off valve 47 is controlled to a predetermined temperature, and the water is sent to the washing machine 62.
When the washing machine water injection valve 56 is closed, the water flow sensor 52 is turned off, whereby the operation of the gas combustor of the water heater 11 is stopped.

(Water Mode) When the water mode is selected, as shown in FIG. 7, the water amount valve 44 is opened, and the hot water opening / closing valve 47 and the remaining hot water opening / closing valve 67 are closed. When the washing machine injection valve 56 is opened in this state, a flow path from the water pipe 27 to the washing machine 62 is formed, and water is supplied to the washing machine 62.

(Reheating Mode) The reheating mode is selected when the hot water put in the bathtub 26 has cooled down and it is desired to reheat it. When the reheating mode is selected,
As shown in FIG. 8, the switching valve A66 switches the flow path to the bathtub 26 side, and the gas combustor and the pump of the water heater 11 operate. When the pump of the water heater 11 is operated, the remaining hot water contained in the bathtub 26 is sucked out from the outlet 26b and sent to the water heater 11. The remaining hot water sent to the water heater 11 is warmed by the gas combustor, returned to the bathtub 26 side, and flows into the bathtub 26 from the supply port 26a. In this way, the hot water in the bathtub 26 is refired.

(Drainage Mode) When the drainage mode is selected, as shown in FIG.
4 is opened. When the drain cock 22 and the water stop valve 24 are opened,
The remaining hot water put in the bathtub 26 is drained out of the bathtub 26.

(Rapid drain mode) The rapid drain mode is selected when it is desired to quickly drain the remaining hot water contained in the bathtub 26. When the quick drain mode is selected, as shown in FIG. 10, the switching valve A66 switches the flow path to the filter 65 side, and the switching valve B54 switches the flow path to the drain side. In addition, the drain plug 22 and the water stop valve 24 are opened, and the pump of the water heater 11 operates. The remaining hot water in the bathtub 26 flows through the drain plug 22 and the water stop valve 24 and is discharged. Moreover,
The hot water is sucked into the pump of the water heater 11, and the remaining hot water in the bathtub 26 is also sucked from the suction port 26 b of the bathtub 26 and the branch portion of the drain pipe 72. The remaining hot water sucked into the hot water heater 11
The water is drained downstream of the water stop valve 24 via the pouring unit 12. In addition, the bathtub suction shutoff valve 74 and the drainage suction shutoff valve 77 are opened by the suction pressure of the pump of the water heater 11 to allow the remaining hot water to flow. Even if the level of the remaining hot water put in the bathtub 26 becomes lower than the suction port 26b,
The remaining hot water is drained from the water stop valve 24 and the branch of the drain pipe 72. When all the remaining hot water in the bathtub 26 has been drained, the water flow sensor 52 does not detect the water flow and is turned off. When the water flow sensor 52 is turned off, the pump of the water heater 11 stops, and the drainage ends. As described above, in the rapid drainage mode, three places (the water surface in the bathtub 26
b) from the two places at the same time.
Since the remaining hot water is discharged, the drainage time can be reduced.

Next, the washing machine 6 for water (remaining hot water) in the bathtub 26 is used.
Fig. 1 shows the procedure for water supply to wastewater 2 and treatment of wastewater to the outside.
1 will be described. The remote water mode is selected by the remote controller 16 while the bathtub 26 is filled with water (S12).
Is opened (S14), the process proceeds to S16. In S16, the drain plug 22 is opened, the water stop valve 24 is closed, the pump of the water heater 11 is operated, the switching valve B54 is switched to the washing machine 62 side, and the remaining hot water in the bathtub 26 is supplied to the washing machine 62. Is done. Thereafter, when the washing machine water injection valve 56 is closed, the water supply to the washing machine 62 is stopped (S18). Continue S20
In, drain the remaining hot water in the bathtub 26 as it is,
The user selects whether to return to the remaining hot water mode and perform water supply to the washing machine 62 again. When the drain mode is selected, the drain plug 22 and the water stop valve 24 are opened, and the remaining hot water stored in the bathtub 26 is drained to the outside. Then, the drainage ends (S24). On the other hand, when the remaining hot water mode is selected in S20, the process returns to the process immediately before S14, and the washing machine water injection valve 56
Is opened again, water is supplied from the bathtub 26 to the washing machine 62. Note that the user does not have to select whether to drain the remaining hot water in the bathtub or to supply the remaining hot water to the washing machine again, as described in S20 above.
May be configured so that the remaining hot water in the bathtub is automatically drained when is closed. When the washing machine injection valve 56 is closed as described above, if the remaining hot water in the bathtub 26 is configured to be drained, the drainage from the bathtub is reliably performed (forgotten drainage is prevented).

When the "drain mode" is selected (S3
2) The process directly proceeds to the process of S22, the drain plug 22 and the water stop valve 24 are opened, and the water put in the bathtub 26 is drained. When the "rapid drainage mode" is selected (S42),
The drain plug 22 and the water stop valve 24 are opened, the pump of the water heater 11 is operated, the switching valve B54 is switched to the drain side, and the bathtub 26
Of water is rapidly drained (S44), and the drainage is terminated (S44).
24).

As described above, the automatic hot water supply apparatus according to the embodiment of the present invention has been described. However, the present invention is not limited to the above embodiment, and the present invention is not limited to various modifications and changes based on the knowledge of those skilled in the art. It can be implemented in an improved form. For example, it may be configured as described below.

(1) The drainage passing through the switching valve B54 does not necessarily have to be drained downstream of the water stop valve 24, but may be drained from other portions to the outside.

(2) A pump may be separately provided in addition to the pump built in the water heater 11, and the pump may supply water to the washing machine 62 or drain the bathtub. With this configuration, water can be sent and drained more efficiently.

[Brief description of the drawings]

FIG. 1 is a system diagram showing the operation of an automatic hot water supply apparatus according to an embodiment (standby state).

FIG. 2 (in a standby state, immediately after a washing water tap is opened)

FIG. 3 (Remaining hot water mode, in which the water surface of the bathtub is above the suction port)

FIG. 4 (Same hot water mode, in which the water surface of the bathtub is below the suction port)

FIG. 5 (the state in which the dust on the filter is washed away)

FIG. 6 (Hot water mode)

FIG. 7 (Water mode)

FIG. 8 (Same-fire mode)

FIG. 9 (drain mode)

FIG. 10: (Rapid drainage mode)

FIG. 11 is a follow chart showing a processing procedure of water supply and drainage from a bathtub of the automatic hot water supply apparatus of the embodiment.

[Explanation of symbols]

10: Automatic water heater 11: Water heater, 11a: Water inlet, 11b: Hot water outlet, 11
c: suction port, 11d: return port 12: pouring unit 14: controller 16: remote control 22: drain plug 24: water stop valve 26: bath tub, 26a: supply port, 26b: suction port 27: water pipe 28: tapping pipe 32: suction pipe 33: return pipe 41: governor 42: water inlet 43: inlet filter 44: water flow valve 45: hot water inlet 46: check valve 47: hot water open / close valve 48: check valve 52: water flow sensor 53: temperature sensor 54: Switching valve B 56: Washing machine injection valve 62: Washing machine 65: Filter 66: Switching valve A 67: Remaining hot water opening / closing valve 69: Drain pipe 72: Drain pipe 74: Bath tub suction closing valve 76: Drain pipe 77: Drain suction suction closing valve

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Tetsuya Higuchi 2-26 Fukuzumi-cho, Nakagawa-ku, Nagoya-shi, Aichi F-term in Rinnai Corporation (reference) 2D005 FA00 2D060 AA03 AA07 3B155 FA38 MA03 MA06 3L024 CC05 DD19 DD50 EE05 FF02 HH39 HH40

Claims (4)

[Claims] A drain valve provided at a bottom portion of the bathtub for draining remaining hot water in the bathtub to a drainage channel when opened; a water stop valve provided in a drainage channel downstream of the drainage plug; One end communicates with the drainage channel between the water stop valve and the other end, and the other end communicates with the water inlet of the washing machine.The pipe connects the bathtub and the washing machine, the pump inserted in the middle of the pipe, and the drain cock is opened and stopped. A controller for closing the water valve and operating the pump. 2. The remaining hot water supply device according to claim 1, wherein the controller has a program for stopping the pump when the washing machine water inlet is closed. 3. The remaining hot water supply device according to claim 1, wherein the controller has a program for opening the water stop valve when the washing machine water inlet is closed. 4. A second drainage channel branching from the downstream side of the pump in the pipe, and a second drainage plug for opening and closing the second drainage channel is provided, and the controller is configured to perform rapid drainage. The remaining hot water supply device according to any one of claims 1 to 3, further comprising a program for opening the second drain plug at the time.