JP2002364913A - Bath heater provided with bathtub-water supply function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bath heater provided with bathtub-water supply function, in which cost reduction and miniaturization are attained. SOLUTION: A running water switch 23 detects whether bathtub water is circulating or not at the time of reheating of the bathtub water. During remaining water in the bathtub is supplied to a washing machines 90 by switching to a condition b in a selector valve 67, if the running-water switch 23 detects that the supply of the bathtub remaining water to the washing- machine 90 has interrupted for a longer time than a predetermined time of circulation, the operation of supplying washing-water to the washing machine 90 is determined to be finished. When the bathtub water is to be supplied to an external part such as the water tank 101 of a flush toilet 100 and the washing machine 90 by switching the condition b in the selection valve 67, the running-water switch 23 detects whether remaining water exists in the bathtub 20 or not.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathtub having a bathtub water supply function having a function of supplying bathtub water to a washing machine.

[0002]

2. Description of the Related Art Conventionally, there is known a bathtub water supply system in which a separate flow path switching unit is externally attached to a bathtub with a water heater and the like, and the remaining hot water (tub water) in the bathtub is supplied to a washing machine. .
In such a bath water supply system, for example,
As shown in 269947, a pump provided in the circulation line by connecting a bathtub water supply line in the middle of a circulation line connecting the bathtub and the bath kettle with a water heater and circulating and heating the bathtub water. To supply the remaining hot water to the washing machine by flowing in the order of the circulation pipe and the bathtub water supply pipe. In addition, such a bathtub water supply system is also provided with a tap water supply pipe that supplies tap water or hot water heated by a water heater to the washing machine. And
When the operation of the washing machine shifts from the washing operation to the rinsing operation,
The hot water flow path to the washing machine is switched from the bath water supply pipe to the water supply pipe to supply clean water or hot water to the washing machine. This switching is performed when the remaining electromagnetic water is supplied to the washing machine, the water electromagnetic valve of the washing machine is opened and closed, and when the water electromagnetic valve is closed and the water flow is not detected for a predetermined time or more, the water supply for washing is completed. It is determined that the water supply for rinsing is possible.

[0003]

However, in the above-described bathtub water supply system, since the bathtub with the water heater and the flow path switching unit are provided as separate bodies, they are provided in the circulation pipe and are used during reheating operation. In addition to a running water switch that detects the presence or absence of bathtub water circulation, a running water switch that detects switching from the washing operation to the rinsing operation of the washing machine must be provided in the flow path switching unit, leading to an increase in cost. An object of the present invention is to provide a bathtub with a bathtub water supply function that solves the above-mentioned problems and reduces cost and size.

[0004]

According to a first aspect of the present invention, there is provided a bathtub with a bathtub water supply function, wherein the bathtub has a circulation path for flowing water through a heat exchanger and circulating the bathtub water. Water flow detection means for detecting a water flow in the circulation path,
Heating means for heating the heat exchanger to reheat the bathtub water based on the detection of the waterflow by the waterflow detection means, and a bathtub water supply branched from the circulation path to supply the bathtub water to the washing machine. A water supply path for supplying clean water or hot water heated to the washing machine to the washing machine; and a hot water supply path to the washing machine, wherein either the bathtub water supply path or the clean water supply path is used. A bathtub with a tub water supply function provided with switching means for switching to one side, wherein a supply path of hot water to the washing machine is switched to the tub water supply path to supply tub water for a washing operation to the washing machine; During the supply of the bathtub water, the state of supply of the bathtub water to the washing machine is monitored using the water flow detecting means, and based on the monitoring result, the hot water supply path to the washing machine is supplied to the washing water supply path. Switch to the road and use the above washing machine There are summarized as to supply hot water heated clean water.

The bathtub with a bathtub water supply function according to the first aspect of the present invention having the above-mentioned structure is provided in a circulation path when supplying bathtub water for washing operation to a washing machine when the bathtub water is reheated. The state of supply of the bathtub water to the washing machine is monitored by using a water flow detecting means for detecting a water flow in the circulation path, and based on the result, the hot water supply path to the washing machine is supplied from the bathtub water supply path to the water supply path. By switching to the supply path, clean water (which may be heated) is supplied to the washing machine as water for the rinsing operation. For this reason, there is no need to separately provide a detecting means for monitoring the supply state of the bathtub water to the washing machine.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of a bathtub with a bathtub water supply function of the present invention will be described below.

FIG. 1 is a schematic configuration diagram of a bath water heater 1 with a bath water supply function (hereinafter, simply referred to as a water heater 1) as one embodiment of the present invention. This water heater 1 is roughly divided into a circulation heating unit 4 for circulating hot water in a bathtub 20 and reheating it.
0 and a hot water supply unit 50 that heats the tap water to be supplied and discharges hot water
And a tub water supply unit 60 for supplying the hot water to the washing machine 90 and the remaining hot water in the bathtub 20 to the washing machine 90 and the flush toilet 100.

The circulating heating unit 40 includes a bath heat exchanger 42 for heating bath water, a return pipe 46 for sending bath water to the bath heat exchanger 42, and a bath water heated by the bath heat exchanger 42. A circulation heat path is formed by the outgoing pipe 47 and the return pipe 46 and the outgoing pipe 47, and the bath heat exchanger 42
And a bath bypass pipe 34 for bypassing. This return pipe 4
6 includes, in order from the upstream side, a bath water thermistor 24 for detecting the temperature of hot water before reheating, a circulation pump 22 for circulating bath water, and a running water switch 23 for confirming the flow of the circulation water.
Is provided. On the other hand, the outgoing pipe 47 has the bath heat exchanger 4
A bath hot water thermistor 25 for detecting the temperature of hot water after reheating is provided in the vicinity of 2. The bath heat exchanger 42 is provided above the bath combustion chamber 49 and is heated by the bath burner 41.

The hot water supply unit 50 includes a water supply pipe 56 connected to a water supply pipe, a hot water supply heat exchanger 52 for heating water supplied from the water supply pipe 56, and a flow for sending out hot water heated by the hot water supply heat exchanger 52. A hot water supply heat exchanger 52
Is provided above the hot water supply combustion chamber 59 and is heated by the hot water supply burner 51. The hot water supply burner 51 includes three sets of burners having different combustion capacities, and the burner that burns is switched according to the amount of combustion. In the water supply pipe 56, in order from the upstream,
A flow sensor 26 for detecting the amount of incoming water, a hot water supply / water supply thermistor 27 for detecting the temperature of incoming water, a motor-driven water amount control valve 28 for adjusting the flow rate of the supplied water so as to obtain a set hot water temperature are provided. A hot water supply heat exchanger outlet thermistor 12 for detecting the temperature of the hot water after the heat exchange is provided.

A hot water supply bypass pipe 36 bypassing the hot water supply heat exchanger 52 is connected between the water supply pipe 56 and the hot water supply pipe 57, and a bypass valve 14 for opening and closing the hot water supply bypass pipe 36.
Is provided. A hot water tapping thermistor 15 for detecting the temperature of the mixed hot water of the water passing through the hot water supply bypass pipe 36 and the hot water after the heat exchange is provided in the tapping pipe 57 downstream of the connection point with the hot water supply bypass pipe 36, Further downstream, it is connected to a general hot water supply pipe 37 communicating with a hot water supply curan 21 (general hot water tap) in a kitchen or the like. Further, a dropping pipe 30 for supplying hot water to the bathtub 20 is provided to branch off from a tapping pipe 57 downstream of the hot water supply tapping thermistor 15. The dropping pipe 30 connects the hot water supply unit 50 and the circulation heating unit 40, and detects a flow rate from the hot water supply unit 50 to the circulation heating unit 40 from the dropping solenoid valve 31 that opens and closes the dropping pipe 30 in order from the upstream side. A drop flow sensor 32 and two check valves 33 for preventing backflow are provided.

Each of the hot water supply section 50 and the circulation heating section 40 is provided with a common air supply duct 35 serving as a supply path of combustion air, and the air is supplied to the bath combustion chamber by one fan 18 driven by a fan motor 19. 49 and the hot water supply combustion chamber 59 are simultaneously supplied. The gas flow path is provided with a main solenoid valve 10 for opening and closing the gas flow path and a proportional valve 11 for controlling the amount of gas in accordance with the amount of electric current in order from the upstream side. And a bath-side gas flow path. On the hot water supply side, hot water supply gas solenoid valves 55 for independently opening and closing gas flow paths to three sets of burners are provided, and independent combustion control is performed. On the other hand, on the bath side, a bath gas solenoid valve 45 for opening and closing the bath-side gas flow path is provided. The bath burner 41 and the hot water supply burner 51 are provided with electrodes 43 and 53 for igniting gas by the operation of the igniter 13 and frame rods 44 and 54 for detecting a combustion flame. A predetermined control, such as tapping and reheating, is performed. The controller 9 includes a microcomputer as a main part, and is connected to a hot water remote control 58 for externally controlling a hot water supply operation and a bath remote control 48 for externally controlling a bath operation.

The hot water supply remote controller 58 controls the set temperature from 38 to 48.
It can be set in the range of ° C and values such as 50 ° C and 60 ° C. Controller 9 performs hot water temperature control such as controlling the combustion amount of hot water supply burner 51 so that the hot water temperature of hot water supply unit 50 approaches the set temperature set by hot water supply remote control 58.

Here, the reheating operation of the bathtub water by the circulation heating unit 40 will be described. When the start of the reheating operation is instructed by the bath remote controller 48, the circulation pump 22 is driven to start circulation of the bath water. Then, it is detected that the bathtub water is circulating by the flowing water switch 23, and if the temperature of the bathtub water detected by the bath water thermistor 24 is equal to or lower than the set temperature in the reheating operation, the fan 18 rotates and the original solenoid valve is turned on. 10 and the bath gas solenoid valve 45 are opened and the bath burner 41 is opened.
The igniter 13 is operated at the same time as the gas is supplied to the bath burner 41 to ignite. While circulating bath water, it is heated by the bath burner 41 and reheated. And while the flowing water switch 23 detects the circulation of bathtub water, the combustion of the bath burner 41 is continued. On the other hand, when the return pipe 46 and the outgoing pipe 47 are clogged or the bathtub water is exhausted and the running water switch 23 does not detect the circulation of the bathtub water, the combustion of the bath burner 41 is stopped. When the bath water thermistor 24 detects that the temperature of the bath water being circulated and heated reaches the set temperature, the bath burner 41 is extinguished and the circulation pump 22 is stopped.

The flush toilet 100 has a structure in which a stopper (not shown) provided on the bottom of the water storage tank 101 is temporarily opened by operating a lever (not shown), and the water stored in the water storage tank 101 is drained as flush water into the toilet. A clean water supply pipe 102 for supplying clean water is connected to 101. In the middle of the water supply pipe 102, the flow path area is reduced in conjunction with the floating ball 103 rising with the rise of the water level in the water storage tank 101, and the flow path is completely raised by rising to a predetermined water level. A well-known ball tap 104 configured to shut off is provided. Further, a toilet water supply pipe 105 for supplying the remaining hot water in the bathtub 20 to the water storage tank 101 has a distal end connected to the water storage tank 101.
Is provided to be slightly above the bottom surface.

The washing machine 90 is connected to a washing water injection pipe 92 through a water solenoid valve 91 for opening and closing a water supply passage.
By performing opening / closing control of 1, a water injection operation in the washing operation and the rinsing operation is performed.

A bath water supply section 60 is provided with a water supply pipe 61 connected to a water supply pipe 56 downstream of the water quantity control valve 28 of the hot water supply section 50, and a hot water supply communicating with a tapping pipe 57 through the dropping pipe 30. A water supply electromagnetic valve 63 and a hot water supply electromagnetic valve 64 for opening and closing respective flow paths are provided. The hot water supply pipe 62 is provided with a check valve 2 for preventing backflow. The water supply pipe 61 and the hot water supply pipe 62 join at the downstream side of the respective solenoid valves and are connected to the main supply pipe 65. The main supply pipe 65 is provided with two check valves 3 for preventing the backflow of the supplied hot water or water, and a flow sensor 4 for pouring the hot water into the washing machine 90.

A bathtub water supply pipe 66 for supplying bathtub water to an external water supply destination such as a washing machine 90 or a water storage tank 101 of a flush toilet 100 is connected to the main supply pipe 65, and the bathtub water supply pipe 66 is circulated. Outgoing pipe 4 of heating unit 40
7 is connected. A switching valve 67 for switching the flow path of the bathtub water to either the bathtub 20 side or the external water supply side is provided at a branch portion of the going pipe 47 to the bathtub water supply pipe 66. In FIG. 1, the case where the switching valve 67 is in the closed position is the state where the bathtub water flow path is switched to the bathtub 20 side (state a), and the case where the switching valve 67 is in the open position. In this state, the bathtub water flow path is switched to the external water supply destination side (state b). The arrows a and b in FIG. 1 indicate the directions of the bathtub water flows in the states a and b, respectively.
The main supply pipe 65 is connected to the external supply pipe 5 that supplies clean water and remaining hot water to an external water supply destination on the downstream side of the connection with the bathtub water supply pipe 66. The external supply pipe 5 branches into a washing water supply pipe 92 and a toilet water supply pipe 105 on the way. A toilet opening / closing valve 106 for opening / closing a flow path to the water storage tank 101 and a water storage tank 10
1 is provided with a pressure sensor 107 for detecting the water level in 1 by water pressure. The toilet opening / closing valve 106 and the pressure sensor 107 are provided separately from the water heater 1 in a toilet unit 108.
Is formed as Further, a pouring remote control 68 is provided for performing an external operation such as switching of a pouring mode to the washing machine 90 and supplying remaining hot water to the water storage tank 101 of the flush toilet 100. Is connected to

The pouring remote controller 68 is, as shown in FIG.
A washing mode switch 71 for selecting a pouring mode during a washing operation of the washing machine 90, a rinsing mode switch 72 for selecting a pouring mode for a rinsing operation, and a display panel for displaying the selected pouring mode and the like. 73, a washing switch 74 for switching on / off of a pouring operation to the washing machine 90, and a toilet switch 75 for switching on / off of an operation of supplying remaining hot water to the water storage tank 101.

The pouring mode during the washing operation is as follows.
A remaining hot water washing mode in which the remaining hot water in the bathtub 20 is directly supplied to the washing machine 90;
The remaining hot water heating and washing mode, which is supplied by heating to 0 ° C., is mixed with hot water from the hot water supply pipe 62 and cold water from the water supply pipe 61.
A hot water washing mode in which the hot water is supplied as mixed water at 0 ° C., a water washing mode in which cold water from the water supply pipe 61 is supplied as it is, and a mixture of hot water from the hot water supply pipe 62 and cold water from the water supply pipe 61 at 30 ° C. There are five types of wool hot water washing modes that are supplied as mixed hot water. In the rinsing mode, there are two types of hot water (40 ° C.) rinsing mode and water rinsing mode.

Here, a water washing mode, a remaining hot water washing mode,
Each pouring control in the hot water (including wool) washing mode will be described. The pouring control in the water rinsing mode and the hot water rinsing mode is the same as the pouring control in the water rinsing mode and the hot water rinsing mode, respectively. In the water washing mode, the hot water supply electromagnetic valve 64 is closed, and the switching valve 67 is switched to the state a.
The water supply electromagnetic valve 63 is opened. Therefore, when the water solenoid valve 91 provided in the washing machine 90 is opened, the water from the water pipe is supplied to the water supply pipe 56, the water supply pipe 61, the main supply pipe 65, the external supply pipe 5, and the washing water supply pipe 92. It flows and is supplied to the washing machine 90.

In the hot water washing (including wool hot water washing) mode, the switching valve 67 is switched to the state a, and the hot water supply electromagnetic valve 64 and the water supply electromagnetic valve 63 are simultaneously opened. Just open the valve. Such a process is defined as one cycle, and when one cycle is completed, the temperature of the hot water poured into the washing machine is equal to the target pouring temperature (hot water washing mode: 40 ° C.,
The controller 9 controls the opening and closing of the hot water supply electromagnetic valve 64 and the water supply electromagnetic valve 63 so that the hot water washing mode for wool is 30 ° C.). Then, a desired pouring amount is obtained by repeating this cycle. Here, the route of pouring water into the washing machine 90 when the hot water supply electromagnetic valve 64 is opened will be described. When the water solenoid valve 91 of the washing machine 90 is opened with the hot water supply electromagnetic valve 64 opened, water is passed through the hot water supply unit 50 to start the combustion operation of the hot water supply burner 51, and the heated hot water is discharged from the hot water supply pipe 57. ,
The water flows through the dropping pipe 30, the hot water supply pipe 62, the main supply pipe 65, the external supply pipe 5, and the washing water supply pipe 92, and is supplied to the washing machine 90. Therefore, when the hot water supply solenoid valve 64 and the water supply solenoid valve 63 are simultaneously opened, hot water and water are simultaneously supplied to the main supply pipe 65 and mixed, and the mixed hot water is supplied to the external supply pipe 5 and the washing water supply pipe 9.
2 to the washing machine 90.

In the remaining hot water washing mode, the water supply solenoid valve 63,
The hot water supply electromagnetic valve 64 is closed, the switching valve 67 is switched to the state b, and the circulation pump 22 is driven. For this reason, the washing machine 9
When the water solenoid valve 91 provided in the bathtub 20 is opened, the remaining hot water in the bathtub 20 is returned to the return pipe 46, the outgoing pipe 47, and the bathtub water supply pipe 6.
6. The water is supplied to the washing machine 90 through the main supply pipe 65, the external supply pipe 5, and the washing water injection pipe 92. Further, in the case of the remaining hot water heating and washing mode, when the remaining hot water passes through the bath heat exchanger 42 while being supplied to the washing machine 90 as described above, the remaining hot water is heated and supplied by the bath burner 41. . still,
The controller 9 controls the combustion of the bath burner 41 and the capacity of the circulation pump 22 so that the temperature of the remaining hot water that has passed through the bath heat exchanger 42 becomes 40 ° C.

Next, control processing performed by the controller 9 in the remaining hot water washing mode will be described with reference to the flowchart of FIG. When the washing switch 74 is pressed while the remaining hot water washing mode is selected (S1), the switching valve 6
7 is switched to state b, and the circulation pump 22 is driven (S
2) It is determined whether or not the flowing water switch 23 for checking the flow of the circulating water is on (S3). That is, the washing machine 9
It is determined whether or not the zero water solenoid valve 91 is in the open state.

If the flowing water switch 23 is on (S
3: YES), in step 4, the circulation pump 22 is continuously driven to supply the remaining hot water to the washing machine 90 until the running water switch 23 is detected to be in the cumulative OFF state for 3 minutes. During the supply of the remaining hot water to the washing machine 90, the flow of water is constantly monitored by the running water switch 23, and whenever water flow is no longer detected, the water stop time is counted and integrated. When the time exceeds a predetermined time (three minutes in the present embodiment) (S4: YES), it is determined that the pouring operation for washing into the washing machine 90 has been completed, and the switching valve 67 is switched to the state a for circulation. Stop the operation of the pump 22 (S5),
The process shifts to a rinse mode for performing pouring control corresponding to the rinse operation of the washing machine 90 (S6). As described above, when the accumulated time during which the water switch 23 does not detect the water flow exceeds the predetermined time, it is determined that the pouring operation for washing into the washing machine 90 has been completed.

On the other hand, if it is determined in step 3 that the water switch 23 has been off for 10 consecutive minutes (S
3: NO), the switching valve 67 is set to the state a to determine whether there is no remaining hot water in the bathtub 20 or whether the water solenoid valve 91 of the washing machine 90 is closed for the reserved operation.
And the operation of the circulation pump 22 is stopped, and the water supply solenoid valve is opened (S7) to supply clean water to the washing machine 90. In step 8, if the flow rate of the water is not less than 2.5 liters / minute by the pouring flow sensor 4 (S 8: YES), the water supply electromagnetic is again determined in order to determine whether or not there is bathtub water in the bathtub 20. Once the valve 63 is closed, the switching valve 67 is switched to the state b,
The circulating pump 22 is driven (S9), and it is determined again whether the flowing water switch 23 is turned on (S10).

In step 10, the water flow switch 23
Is ON (S10: YES), it is determined that there is bath water and the process returns to step 4, while the running water switch 23
Is OFF (S10: NO), the water solenoid valve 91 of the washing machine 90 is open, but it is considered that there is no bathtub water in the bathtub 20, and the pouring of the bathtub water to the washing machine 90 is stopped.
To pour clean water itself or hot water which heated water,
The switching valve 67 is switched to the state a to stop the operation of the circulation pump 22 (S5), the washing mode is interrupted, and the mode is shifted to the rinsing mode (S6).

In step 8, the flow rate sensor 4 for pouring
18 with no more than 2.5 liters / minute
If the time has elapsed, the water supply electromagnetic valve 63 is closed (S1).
1), the control ends (S12). The reason for waiting for a long time here is that the reservation timer of the fully automatic washing machine may be used. If the washing machine 90 is in a reserved operation,
At the reserved time, the water solenoid valve 91 of the washing machine 90 is opened (S8: YES), and the process proceeds to step 9. However, if the passage of water is not detected after waiting for 18 hours (S8: NO), an erroneous operation by the user is performed. It is determined that there is, and the water supply electromagnetic valve 63 is closed (S11), and the control of the remaining hot water washing mode is ended (S1).
2).

By the control of the remaining hot water washing mode described above,
If there is remaining hot water (bath tub water) in the bathtub 20, the remaining hot water is supplied as it is to the washing machine 90. If there is no remaining hot water, the remaining hot water cannot be used. Alternatively, hot water obtained by heating clean water is supplied to the washing machine 90.

In the control of the remaining hot water heating and washing mode,
Bath combustion control is performed between step 3 and step 4 of the control of the remaining hot water washing mode. This means that the opening degree of the proportional valve 11 is adjusted to adjust the amount of gas supplied to the bath burner 41, and the capacity of the circulation pump 22 is adjusted to reduce the amount of remaining hot water flowing to the bath heat exchanger. The control of the adjustment controls the temperature of the remaining hot water that is heated and supplied to the washing machine 90 to a predetermined value (for example, 40 ° C.).

When the washing mode is completed, the mode shifts to the rinsing mode. In the water rinsing mode, the switching valve 67 is switched to the state a, and the water supply electromagnetic valve 63 is opened. For this reason, the washing machine 9
When the zero water solenoid valve 91 is opened, water is supplied to the washing machine 90. Then, it is determined that the rinsing operation of the washing machine 90 has ended when two hours have elapsed since the shift to the water rinsing mode, and the control is ended. In the hot water rinsing mode, the switching valve 6
7 is switched to state a, and hot water at 40 ° C. is supplied to the washing machine 90 by the same control as in the above-described hot water washing mode. Then, when two hours have passed since the shift to the hot water rinsing mode, it is determined that the rinsing operation of the washing machine 90 has ended, and the control is ended.

Next, the water storage tank 10 of the flush toilet 100
The control process performed by the controller 9 when the remaining hot water is supplied to 1 will be described with reference to the flowchart of FIG. When the remaining hot water is supplied to the water storage tank 101, the clean water is supplied from the clean water supply pipe 102. When the toilet switch 75 is pressed to supply the remaining hot water to the water storage tank 101 of the flush toilet 100 (S1), this routine starts, and first, the switching valve 67 is switched to the state b (S1).
2). When there is no detection history indicating that there is no remaining hot water in the bathtub 20 (S3: YES), the water level of the water storage tank 101 is detected by the pressure sensor in step 4. Water storage tank 10
The difference between the standard water level (H1) when the water level is 1 and the water level (Hn) detected by the pressure sensor 107 is equal to or greater than a predetermined value (for example, 6).
0 mm or more) (S4: YES), the flush toilet 1
00 is operated, and the water storage tank 10 is operated.
It is determined that the water stored in 1 has been drained to the toilet as running water. Thereafter, in order to wait for the water in the water storage tank 101 to settle, wait for three seconds to elapse, and after elapse of three seconds (S5: YES), detect the settled water level (Hn ′), and then The circulating pump 22 is driven to open the toilet opening / closing valve 106 (S6). Then, it is determined whether or not the flowing water switch 23 for confirming the flow of the circulating water is on (S7), and it is determined whether or not there is remaining hot water in the bathtub 20.

If the running water switch 23 is on (S
7: YES), and in step 8, the remaining hot water is stored in the water storage tank 10
The circulation pump 22 continues to be driven until it is determined that the predetermined supply time T for supplying to the
The remaining hot water is supplied to the water storage tank 101 from the toilet water supply pipe 105 together with the clean water from the second water. A method for calculating the supply time T will be described later. When the supply time T has elapsed from the start of the supply of the remaining hot water (S8: YES), the toilet opening / closing valve 106 is closed, the operation of the circulation pump 22 is stopped (S9), and the supply of the remaining hot water to the water storage tank 101 is stopped. The water level (Hm) of the water storage tank 101 is detected to calculate T (S1).
0). Thereafter, if a change in the water level of the water storage tank 101 is not detected (S11: YES), it is determined that the water storage tank 101 is full and the supply of clean water is also stopped, and step 12 is performed.
Proceed to. In step 12, if the difference between the standard water level (H1) and the water level (Hn) detected by the pressure sensor 107 is equal to or more than a predetermined value (for example, 60 mm or more) (S12: YE).
S), it is determined that a predetermined amount or more of water has not been supplied to the water storage tank 101 because the clean water is not supplied due to water cutoff or the like, and the process returns to step 6 to further supply remaining hot water. If the difference between H1 and Hn is equal to or smaller than a predetermined value (S12: N
O), it is determined that the remaining hot water and clean water have been sufficiently supplied to the water storage tank 101, the water level in the water storage tank 101 at this time is detected by the pressure sensor 107, and the detected water level is replaced with the standard water level (H1). (S13) After calculating and updating the supply time T based on a calculation method described later (S19),
Returning to step 3, in step 4 again the flush toilet 100
Wait until is used. The standard water level (H1) is
When the toilet switch 75 is turned on, an initial value is given. However, by repeating such processing, it is constantly updated in step 13.

On the other hand, if the water flow switch 23 is in the off state for one continuous minute in step 7 (S7: NO),
Judging that there is no remaining hot water in the bathtub 20, the toilet opening / closing valve 1
06 is closed and the operation of the circulation pump 22 is stopped (S1
4) Return to step 3. In this case, there is a detection history indicating that there is no remaining hot water in step 3 (S3:
NO), the process proceeds to a step 15, and the bathtub 2 for automatic bath operation and the like
The process waits until the operation of dropping hot water into zero is performed (S15: NO). When hot water is supplied to the bathtub 20 (S
15: YES), the supplied bathtub water is stored in the storage tank 1
Before that, the switching valve 67 is switched to the state a, the toilet opening / closing valve 106 is opened, and the water supply electromagnetic valve 63 is opened (S16). Supply. This prevents the water in the toilet injection pipe 105 from being extruded and emptied when the circulation pump 22 is driven even though there is no remaining hot water, thereby preventing the water level detection by the pressure sensor 107 from being performed accurately. This is performed to fill the toilet water pipe 105 with water.
When the pouring flow sensor 4 detects that a predetermined amount (for example, 5 liters) of clean water has been supplied (S17: YES),
The water supply electromagnetic valve 63 is closed, the toilet opening / closing valve 106 is closed, the switching valve 67 is switched to the state b (S18), and the process returns to step 4 and waits until the flush toilet 100 is used. When the flush toilet 100 is used, the bathtub water is supplied to the water storage tank 101 together with the clean water from the clean water supply pipe 102 according to the above-described control.

Here, a method of calculating the predetermined supply time T for supplying the remaining hot water to the water storage tank 101 will be described. When the toilet switch 75 is turned on, T takes an initial value T ₁ (for example, 10 seconds). Then, an n-th value T _n when the above control is repeated is calculated by the equation (1). _{T n = (H1-Hn '} ) / K ······ (1) where K is, K = (Hm-Hn' is _{a) / T n-1 ······ (} 2). H1 is the water level detected in step 13, Hn 'is the water level detected in step 6, and Hm is the water level detected in step 10. That is, K is the rate of increase of the supply water when both the remaining hot water and the clean water are supplied to the water storage tank 101, and at the rate of increase, the water level (H1) at the time of full water and the supply of the remaining hot water have begun. By dividing the difference from the current water level (Hn '), the supply time T at which the water storage tank 101 becomes full when the supply of the remaining hot water is stopped can be obtained.
In this way, the supply time T for supplying the remaining hot water to the water storage tank 101 can be constantly corrected, and the optimum supply time for the remaining hot water to the water storage tank 101 can be obtained.

As described above, in the bath water heater 1 with the bath water supply function of the present embodiment, when the switching valve 67 is switched to the state b to supply the remaining hot water to the washing machine 90, the bath water is added. Utilizing the running water switch 23 for detecting whether or not bathtub water is circulating at the time of baking, by detecting that the supply of bathtub water to the washing machine 90 has been interrupted for a predetermined cumulative time or more, When the end of the pouring operation for washing is detected,
A transition is made to a rinsing mode for performing pouring control corresponding to the rinsing operation of washing machine 90. For this reason, there is no need to separately provide a detection unit for detecting the end of the pouring operation for washing into the washing machine 90, so that the cost of the appliance can be reduced. Further, the running water switch 23 switches the switching valve 67 to the state “b” to switch the water storage tank 101 of the flush toilet 100 or the washing machine 90.
When supplying bathtub water to an external water supply destination such as
It is also possible to detect whether there is any remaining hot water in 0.
For this reason, there is no need to separately provide a detecting means for detecting the presence or absence of the remaining hot water, so that the cost can be further reduced. In addition, a bath tub water supply unit 60 for supplying hot water to and from the washing machine 90 and supplying remaining water in the bath tub 20 to the washing machine 90 and the flush toilet 100 is built in a bath kettle with a water heater, so that washing and pouring is performed. The signal of the flowing water switch 23 can be easily used for control, and the entire system can be easily integrated and controlled. Further, the workability such as mounting can be improved as compared with the case where the device is formed as a separate device.

The water storage tank 10 of the flush toilet 100
In order to constantly correct the supply time T of the remaining hot water to the storage tank 1 during the control process performed by the controller 9, the water storage tank 101
The optimal amount of remaining hot water can be supplied to Further, if there is residual hot water in the bathtub 20, if the clean water cannot be supplied to the water storage tank 101 of the flush toilet 100 due to water cutoff, the flush toilet 10
The problem that 0 cannot be used can be prevented.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments at all, and it is needless to say that the present invention can be carried out in various modes without departing from the gist of the present invention. is there. For example, in the rinsing mode, water or hot water may not be supplied to the washing machine, but only water may be supplied. It may be determined that the pouring operation for washing into the washing machine 90 is completed even when the flush switch 23 does not continuously detect the water flow for a predetermined time or more.

[0038]

As described in detail above, claim 1 of the present invention
According to the bathtub with a bathtub water supply function described in the above, the detection means for monitoring the supply state of the bathtub water to the washing machine is separately provided by also using the water flow detection means for detecting the water flow in the circulation path at the time of reheating. Since there is no need to provide them, the cost of the device can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a bathtub with a bathtub water supply function as the present embodiment.

FIG. 2 is an external view of a pouring remote controller.

FIG. 3 is a flowchart illustrating a control process performed by a controller in a remaining hot water washing mode.

FIG. 4 is a flowchart illustrating a control process performed by a controller when supplying remaining hot water from a bathtub to a water storage tank of a flush toilet.

[Explanation of symbols]

1 ... bath water heater with bathtub water supply function, 9 ... controller,
20 ... bathtub, 23 ... running water switch, 40 ... circulation heating unit,
41: Bath burner, 42: Bath heat exchanger, 46: Return pipe, 47: Outgoing pipe, 60: Bathtub water supply section, 65: Main supply pipe, 66: Bathtub water supply pipe, 67: Switching valve, 90: Washing Machine.

Continued on the front page F term (reference) 2D005 FA00 3B155 AA17 BB14 FA31 FA38 FD06 KA38 LA14 LC03 MA03 MA06 MA10 3L024 CC30 DD06 DD15 DD22 DD27 DD50 GG18 GG23 GG28 GG37 GG41 HH04 HH31 HH40

Claims (1)

[Claims] 1. A circulation path for flowing bathtub water through a heat exchanger and circulating the water, a water flow detection means provided in the circulation path and detecting a water flow in the circulation path, and a water flow detection by the water flow detection means. A heating means for heating the heat exchanger to reheat the bathtub water, a bathtub water supply passage branched from the circulation path and supplying the bathtub water to the washing machine, A bathtub provided with a water supply path for supplying hot water heated to water, and a switching means for switching a supply path of hot water to the washing machine to either the bathtub water supply path or the water supply path. In the bath kettle with a water supply function, the hot water supply path to the washing machine is switched to the bathtub water supply path to supply the washing machine with bath water for the washing operation, and the water flow detection is performed during the bath water supply. Monitor the supply of bath water to the washing machine Switching the hot water supply path to the washing machine to the clean water supply path based on the monitor result, and supplying the cleansing water or hot water for heating the clean water to the washing machine. A bath kettle with a bathtub water supply function.