JPH1094692A - Washing method for filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly convenient sanitary water charging method capable of reutilizing the residual water of a bathtub without making sewage generated by washing of a filtering machine stain the inside of the bathtub. SOLUTION: A water pouring unit 2 is freely attachably and detachably installed between the side of a water supply device 1 and the side of the bathtub 4 and can pour the water to a washing machine 3. At the time of pouring the residual water of the bathtub 4 to the washing machine 3, the residual water is purified by a filter 23 in a water pouring path. For the washing of the filter 23, by the changeover of a first three-way valve 21 and a second three-way valve 22, the filter 23 is made to pass through the water in a direction opposite to the time of pouring the water, however, when a cancellation button 72 is operated and a cancellation switch is in an ON state, it is not executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply device which can purify bath water by a filtering means and inject water into an external device to be injected. The present invention relates to a method for cleaning a filtering means for cleaning.

[0002]

2. Description of the Related Art There is a water supply device which supplies water or hot water from a hot water heater to a bathtub and also can be used as washing water for a washing machine. Such an apparatus is described in, for example, JP-A-7-124383, and appropriately selects warm water or water according to the washing and rinsing steps of a washing machine,
Further, the washing machine is configured to switch between residual water and tap water in the bathtub to supply water to the washing machine. Such a water supply device is connected to a washing machine by a control controller, operates according to a predetermined program, and is systematized in conjunction with a control system on the washing machine side.

When the residual water in the bathtub is poured into the washing machine, if the residual water is directly poured into the washing machine, dirt and impurities contained in the residual water are taken in as washing water together with the washing water. As well as contaminating, the clogging of the water supply / drain valves on the washing machine side is a serious inconvenience. For this reason, according to the above-mentioned publication, when the remaining water from the bathtub is poured into the washing machine, the residual water is filtered using a filter, and on the other hand, the clean water is poured into the filter every time the water supply is completed. It is described that the water is passed in the opposite direction to the time to wash the water, and the sewage resulting from the cleaning is discharged into the bathtub.

[0004]

However, according to the above-described water supply apparatus, when the water supply from the bathtub to the washing machine is completed, the filter is washed, and every time the washed wastewater flows into the bathtub. For this reason, residual water in the bathtub is garbage and hair (hair)
In the case of further contaminating, for example, when the remaining water is reheated to take a bath, or when the remaining water is continuously poured into the washing machine from the bathtub, it is not preferable, and there remains a problem in hygiene.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a cleaning apparatus for cleaning a filter when reusing residual water in a bathtub. It is an object of the present invention to provide a sanitary and highly convenient method for cleaning filtering means, which makes it possible to reuse residual water in a bathtub without preventing wastewater from flowing into the bathtub and making the wastewater dirty.

[0006]

In order to achieve the above-mentioned object, a method for cleaning a filtering means according to a first aspect of the present invention is described as follows. A water injection operation of injecting water into a water injection point, and water remaining in the bathtub is injected into the water injection point through the water supply device side, and the residual water is purified and injected by a filtering means provided in a water supply passage, and purified water injection is performed. After the cleaning and pouring operation, the cleaning operation is performed by passing the clean water supplied from the water supply device side through the filter means in a direction opposite to the direction of the water pouring, thereby cleaning, and discharging the cleaning contaminated water to the bathtub. In the water supply device that selectively performs, when the cancel switch for canceling the cleaning operation is in an ON state, regardless of the cleaning operation command issued after the purification water injection operation, the cleaning operation is not performed. It was "that characterized.

According to this washing method, in the washing operation for washing the filtering means, the clean water supplied from the supply device after the purification and water injection operation is passed through the filtering means in a direction opposite to the direction of water injection. The washing wastewater generated by this is discharged to the bathtub. According to the present invention, when the cancel switch for canceling the washing operation is on, the washing operation of the filtering means is not executed regardless of the instruction of the washing operation .

[0008] For this reason, since the cleaning sewage is not discharged into the bathtub, the residual water in the bathtub is not contaminated, and the residual water can be reused as a bath. In addition, this cancel switch, in addition to bathing, when the residual water in the bathtub is scheduled to be used for washing or the like, restricting the washing operation of the filtering means from being executed, or by operating a manual cancel button, or When the residual water is scheduled to be used as described above, it indicates a switch that is automatically turned on and off by the control device. When the cancel switch is in the on state, the switch operates and the regulation is performed. Under state.

[0009] The method for cleaning the filtering means according to claim 2 of the present invention is characterized in that a water or hot water supplied from a water supply device is injected into a bathtub or a location to be injected, and the residual water in the bathtub is removed. Water is injected from the water supply device side through the water supply device side, and the residual water is supplied from the water supply device side after a purification water injection operation in which the residual water is purified and injected by a filtering means provided in the water supply passage and after the purification water injection operation. A cleaning operation performed by selectively passing the purified water through the filter means in a direction opposite to the direction of the water injection. Is in the off state, the sewage is discharged to the bathtub, and in the washing operation, when the drain switch is in the on state, the sewage is discharged to a discharge location different from the bathtub. It is characterized by.

According to this cleaning method, in the cleaning operation for cleaning the filtering means, the clean water supplied from the supply device after the purification water injection operation is passed through the filtration means in a direction opposite to the direction of water injection. You. And, in the present invention, during the cleaning operation, when the discharge switch for discharging sewage due to cleaning is in an OFF state, the sewage is discharged to the bathtub. The sewage from the washing is discharged to a discharge place different from the bathtub.

When the drain switch is in the ON state, when the residual water in the bathtub is scheduled to be used for washing or the like in addition to bathing, the waste water from the cleaning is discharged to a discharge location different from the bathtub. When the switch is in the off state, it means a state in which the wastewater is discharged to the bathtub. Thereby, regardless of whether the residual water in the bathtub is used or not, the washing operation of the filtering means can be always performed. Then, when the residual water in the bathtub is used or scheduled to be used, the cleaning sewage generated by washing the filtering means is discharged to a discharge point different from the bathtub, and discharged to the bathtub to contaminate the residual water. Is prevented. The discharge switch is a switch that is manually or automatically turned on and off.

[0012]

As described above, according to the method for cleaning the filtering means according to the first aspect, when the cancel switch is turned on, the cleaning operation of the filtering means is not executed, so that the residual water in the bathtub is prevented. When it is scheduled to use, it is prevented that the sewage generated by washing the filter makes the inside of the bathtub dirty. Therefore, the residual water in the bathtub is sanitary and can be reused, which is convenient.

According to the second aspect of the present invention, the sewage generated by the washing of the filtering means is discharged to a discharge point or a bathtub different from the bathtub depending on whether the discharge switch is on or off. By doing so, the washing operation of the filtering means can always be executed, and when the residual water in the bathtub is to be used, the residual water in the bathtub is prevented from being contaminated. Therefore, the residual water in the bathtub is sanitary and can be reused, which is convenient.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a water supply apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing the entire water supply device of the present invention. The appliance (1) is, for example, a water heater with a reheating function connected to a water supply source. The device (1) has a three-way valve (A) as a branch point and pipes (14) (15) (1).
6), and the line (15) is equipped with a refired heat exchanger (12a),
The pipe (14) is provided with a hot water supply heat exchanger (12b). A reburning burner (13a) and a hot water supply burner (13b) for heating these
And a circulation pump (11) is provided in the pipeline (16). Further, the pipes (14), (15), (16) in the appliance (1) are switched to a circulation state or a hot water supply state by the three-way valve (A), or the operation of the pump (11) and the burners (13a), (13b). An electrical unit (10) for controlling is mounted.

The water injection unit (2) is interposed between the appliance (1) and the bathtub (4) and the washing machine (3), and supplies water or hot water supplied from a water supply source through the appliance (1) to an external bathtub. (4) and washing machine
Switch to (3) as appropriate and supply water, or use the pump (11) of the appliance (1) to supply the remaining water in the bathtub (4) to the washing machine (3). For this reason, the water injection unit (2) has a pipeline (27a) connected to the pipeline (15) and pipeline (16) from the appliance (1), and a pipeline (27).
b), the first three-way valve (21) and the second three-way valve (2
A pipe (29) and a pipe (27c) connected via 2) are provided, and a water supply path is appropriately selected by switching the first three-way valve (21) and the second three-way valve (22). From the water injection unit (2) to the bathtub (4), the pipe (62) and the pipe (63) are connected to the pipe (27a) and the pipe (27b), and from the water injection unit (2) to the washing machine.
To (3), a water supply pipe (61) is connected to the pipe (29) so that water or hot water can be supplied.

In the water injection unit (2), when a water supply pressure is generated in the forward direction with the water supply direction, that is, the direction toward the washing machine (3) as a forward direction, in the middle of the pipe line (29), the valve is closed. A check valve (24) is provided that opens against a spring (24a) that urges in the direction, and a pipe (29) is further provided with a pipe downstream of the check valve (24). A pressure switch (25) for detecting the water pressure in the path (29) is provided. A filter (23) is provided between the check valve (24) and the connection port c of the first three-way valve (21). A pipe (27c) from the connection port c of the second three-way valve (22) is connected between the check valve (24) and the filter (23). Between the connection port a side and the connection port b side of the first three-way valve (21) in the pipe line (27a), there is provided a solenoid valve (3) for injecting water into the washing machine.
When (0) is closed, the water supply pipe (61), the water supply channel (29), and the pipeline (15)
A bypass (27d) provided with an overpressure relief valve (28) to be described later is connected in parallel by bypassing the first three-way valve (21) so that the internal water pressure does not excessively rise.

Further, a water flow switch (26) for detecting the presence or absence of a water flow is provided upstream of the additional heat exchanger (12a) in the pipe (15) in the appliance (1). Water injection unit
In (2), the pressure switch (25) and the water flow switch (26)
The first three-way valve (21) and the second three-way valve (22)
An electrical unit (20) for controlling the switching of the power supply is provided. In the water supply device in the above example, the appliance (1) and the water injection unit
(2) and (2) are separate configurations, but these may be configured as one device body.

According to the above arrangement, the operation of filling the bathtub (4) with water is first selected by the remote controller (51) of the appliance, and the operation of the appliance (1) is controlled by the electrical units (10) and (20). )
The three-way valve (A) is connected from the pipe (14) side to the pipe (15), while the first three-way valve (21) and the second three-way valve of the water injection unit (2) are connected.
(22) conducts between the connection port a and the connection port b. Hot water supply burner (13b)
Is heated by the heat of combustion to make hot water, pipe (15), pipe
(27a) and supplied to the bath tub (4) via the pipe (62) and the bath tub via the pipe (16), the pipe (27b) and the pipe (63)
Supplied to (4).

Next, the operation of the water supply device in the present embodiment will be described in detail below with reference to FIGS. 2 to 4 are water supply circuit diagrams showing a water supply state, in which FIG. 2 shows a water supply state from the bathtub (4) to the washing machine (3), and FIG. 3 shows a water supply state of the filter (24). Washing condition,
FIG. 4 shows a state of supplying fresh water to the washing machine (3). 5 to 7 show a washing machine (3) according to the present embodiment.
It is a flowchart for explaining the water supply operation to the,
5 shows a step of supplying remaining water from the bathtub (4) as washing water, FIG. 6 shows a water supply step for rinsing, and FIG. 7 shows a step of supplying fresh water as washing water. [Water supply of washing water from bathtub (4) to washing machine (3)] Washing machine
When (3) is turned on (S1), the remote control (5
2) The mode changeover switch provided in “Remaining hot water washing mode”
In the state (S2), the remaining water (or remaining hot water) in the bathtub (4) is washed by the washing machine based on the control of the electrical units (10) and (20).
Supply water to (3). 2 and 5, the three-way valve (A) conducts (S3) from the pipe (16) side to the pipe (15) side, and the first three-way valve (2)
1) conducts (S4) through the connection ports a to c, and the second three-way valve (22) conducts (S5) through the connection ports b to a. And
When the pressure switch (25) is turned off in (S6) and the solenoid valve (30) is determined to be open, the pump (11) operates (S7) and the bathtub (4)
Remaining water from pipeline (63) → pipeline (27b) → pipeline (16) → pump (11) → pipeline (15) → reheating heat exchanger (12a) → first three-way valve
After passing through the water supply circuit of (21) → pipe (29) → water supply pipe (61), water is supplied into the washing machine (3) via the solenoid valve (30) of the washing machine (3).

Here, as shown in the figure, the washing machine (3) includes:
An electromagnetic valve (30) as opening / closing means is provided, and a pipe (29) in the water injection unit (2) and the electromagnetic valve (30) are connected by a water supply pipe (61). In this device, the pressure switch
The opening / closing operation of the solenoid valve (30) in the washing machine (3) is detected by (25), and the water supply control of the water supply device is performed based on the detection. A pressure switch (25) inside a pipe (29) and a water supply pipe (61) and in a sealed area (64) defined between a check valve (24) and a solenoid valve (30). Is held, and the pressure switch (25) turns on the line (29),
The threshold value is set so that the valve is turned off when the pressure is low, and is turned on when the pressure between the solenoid valve (30) and the check valve (24) is high.

When the remaining water is supplied from the bathtub (4), the solenoid valve (30) of the washing machine (3) is open and
The check valve (24) is supplied with water pressure in the forward direction to generate a water flow. Here, when the control device of the washing machine (3) determines that a predetermined amount of washing water has been supplied, the solenoid valve (30) is automatically closed on the washing machine (3) side. As a result, the water flow stops on the upstream side of the solenoid valve (30) even though the water supply pressure by the pump (11) is applied to the pipeline (29). The high pressure is detected and the water supply device is turned on to detect the closing of the solenoid valve (30). Then, the pressure difference between the upstream part and the downstream part of the check valve (24) does not occur, and the check valve (24) is closed by the urging force of the spring (24a). That is, the solenoid valve (3
When the valve (0) is closed, the pump (11) stops, but the solenoid valve
Since water is kept in a pressurized state in the sealed area (64) defined by the (30) and the check valve (24), the pressure (static pressure) becomes higher than when water is passed, The pressure switch (25) arranged in the sealing area (64) is kept on under the pressurized state.
Therefore, even when the solenoid valve (30) of the washing machine is closed, the water is fed into the pipe (29) by turning the pump or the like, and the solenoid valve (30) is opened and the pressure switch (25) is opened. There is no need to add a water supply pressure for enabling detection based on a change in the detection pressure, and it is only necessary that the water supply path has a pressure resistance against a sealed pressurized state. Thereafter, due to the control of the washing machine (3), when the solenoid valve (30) is opened, the pressurized state of the sealed water in the sealed area (64) is released, so that the sealed area ( The water pressure in 64) decreases, the pressure switch (25) is turned off by a pressure lower than a predetermined threshold, and the water supply device detects the opening of the solenoid valve (30). When the pump (11) is operated based on the detection of the valve opening, the check valve (24) is opened and the water is again passed.

By the way, as described above, when the solenoid valve (30) is automatically closed on the washing machine (3) side even though bathtub water is supplied from the bathtub (4), FIG. Indicated pump
(11) → Pipe (15) → Heat exchanger (12a) → Pipe (27a) → First three-way valve (21) → Filter (23) → Pipe (29) → Water supply pipe (61)
Since the water flow stops, the water supply source pressure due to the discharge pressure of the pump (11) is directly applied to each of the above-mentioned parts. As a result, the internal pressure rises, and an excessive pressure tends to act on the above-mentioned parts, so that a required pressure load is imposed on the respective parts of the water supply in the above-mentioned path. However, according to the present embodiment, of the water passage, the pipe (27d) is provided with an overpressure relief valve (28) as a pressurization preventing member, so that a pressure exceeding a certain level is not applied to the passage. It is planned.

Now, return to the steps of FIG. When the water flow switch (26) is off and there is no water flow (S8), and when the pressure switch (25) is on (S9), a predetermined amount of remaining water is supplied into the washing machine (3) and the washing is performed. (3) control device is a solenoid valve
It can be recognized that (30) has been closed. Accordingly, the pump (11) is stopped (S10). Further, in (S9), if the pressure switch (25) remains off while there is no water flow (S8), it is determined that the water in the bath tub has run out, and the pump (11) is stopped (S91). Then, the mode is switched to the "wash water mode" in FIG.

Next, when a predetermined time elapses after the pump (11) is stopped in (S10) ((S11); three minutes or more in this embodiment),
Assuming that the control device of the washing machine has determined that the injection of the washing water for the washing process is completed, the filter (23) washing process (S
12) to (S16), if it has not elapsed, determine whether the pressure switch (25) has been turned off (the solenoid valve (30) opens) (S11a), and if it has been turned off, Since the amount of water supply in the washing machine (3) is insufficient, the pump is turned on to perform the water supply operation again (S11b), and the process returns to (S8). [Washing of the filter (23)] The remaining water in the bathtub (4) is the washing machine (3).
When water is injected into the filter (23), the filtered dirt accumulates in the filter (23), which becomes a filter, which becomes a resistance, making it impossible to secure a flow rate at the time of water injection. Therefore, the filter (23) is washed. The washing of the filter (23) is shown in FIG.
As shown in (3), the three-way valve (A) conducts from the pipe (14) to the pipe (16), and the first three-way valve (21) is switched from the connection port c to the connection port b (S11). The second three-way valve (22) has connection ports a to c.
The operation is switched to (S12), and the water beam operation of (S13) is performed.

That is, clean water is passed through the filter (23) in a direction opposite to that in the above-described manner of water injection into the washing machine, whereby the filter (23) is washed. Is discharged to the bathtub (4) via the pipe (27a) → the pipe (62). Hereinafter, the cleaning step will be described. Water injection from the bathtub (4) to the washing machine (3) is completed (S2 to S11),
When a user operates a manual cancel button (72) provided in (1), a cleaning cancel switch (not shown) in the electric transmission unit (10) which is turned on or off is determined to be in an ON or OFF state. (S12). The user intends to use the remaining water in the bathtub (4) (for example, reheat it again and use it as bathing water) and press the cancel button (7
When 2) is operated and the cancel switch is determined to be ON, washing of the filter (23) is not performed, and the process proceeds to the next rinsing step (S20). That is, even though the residual water in the bathtub (4) is scheduled to be used, when the filter (23) is washed and the washed sewage is discharged into the bathtub (4), the sewage fills the bathtub (4). This is because it is contaminated and causes inconvenience. Thereby, according to the present embodiment, the user can use the bathtub (4).
If you plan to use the remaining water in the
2) is operated, the cancel switch is turned ON, and the washing operation of the filter (23) is not executed regardless of the washing command, so that the inside of the bathtub (4) is not stained. If the cancel switch is OFF and the determination of (S12) is NO, the three-way valve (A) conducts between the pipe (14) and the pipe (16) (S1).
3) Then, the first three-way valve (21) is switched from the connection port c to the connection port b (S14), and the second three-way valve (22) is switched from the connection port a to the connection port c (S15). Then, the clean supply water introduced from the appliance (1) side, i.e., the flush water, is supplied from the pipe (14) of the appliance (1) (S16) by opening the water supply valve (K).
Pipe (14) → three-way valve (A) → pipe (16) → pipe (27b) →
2nd three-way valve (22) → line (27c) → line (29a) → filter (2
3) → First three-way valve (21) → Pipe (27a) → Pipe (62) → Bathtub (4)
Water is passed through the route to. As a result, the filter (23) is washed, and the wastewater is discharged to the bathtub (4). After 5 liters of water is supplied, the water supply valve (K) closes and the filter (23)
Washing is completed. In addition, the clean water supplied at the time of this washing is operated by operating the hot water supply burner (13b) at the time of this washing.
Hot water may be used, and it is preferable from the viewpoint of hygiene that the bacteria of the filter (23) are killed. [Water Supply as Rinsing Water to Washing Machine (3)] Following the above, the step of supplying the washing water as rinsing water will be described below with reference to FIGS. When the filter washing step of (S16) is completed, the three-way valve (A) is switched (S20) so that the pipe (14) and the pipe (15) are conducted, and the first three-way valve (21) is connected to the connection port. The connection is switched to the connection from a to the connection port c (S21), and the second three-way valve (22) is closed (S22). As a result, as shown in FIG. 4, the water supply path is changed to the pipe (14) of the appliance (1).
From the water supply valve (k), heat exchanger (12b) (12a) → line (15) → line (27a) → first three-way valve (21) → water supply line (29) → water supply pipe (61) A route to the washing machine (3) is formed. Here the washing machine
When the control device of (3) opens the solenoid valve (30) to perform the rinsing process, it is determined that the pressure switch (25) is off (S23), and the water supply valve (k) of the appliance (1) is determined. Is opened to supply water from the water supply source (S24) (water beam operation).

When a predetermined amount of water is supplied to the washing machine (3),
When the control device of (3) determines, the washing machine performs the rinsing operation by closing the solenoid valve (30).
When (26) is off and there is no water flow (S25) and the pressure switch (25) is on (S26), it is determined that the solenoid valve (30) is closed and the water supply valve is closed to supply water. Stop (S27). When the water flow switch is off (S26) and the pressure switch (25) is off, the solenoid valve (30) is not closed but there is no water supply, that is, it is determined that the water supply is cut off, and the water supply valve ( K) is closed to stop the water beam operation (S261), and display an error (S30)
I do.

When the rinsing operation of the washing machine (3) is repeated again, the solenoid valve (30) is opened accordingly, the off state (S28) of the pressure switch (25) is detected, and the water supply step is started. Return to the routine of (S24). When a predetermined time has elapsed (at least 20 minutes in this embodiment) from the first stop of water supply in (S27), and the ON state of the pressure switch (25) is detected.
In (S28) and (S29), it is determined that the rinsing step has been completed in the washing machine. Until the elapse of 20 minutes, it is determined that the rinsing step is in the middle of the rinsing process, and the routine returns to the (S24) routine every time it is determined that the solenoid valve (30) has been opened by turning off the pressure switch (25). Do a water beam for [Water supply as washing water] Washing machine using washing water
The step of supplying washing water to (3) will be described with reference to FIGS. 4 and 7. When the washing machine (3) is turned on and the mode changeover switch provided on the remote control (52) of the water injection unit is in the "washing mode" (corresponding to step (S2) in FIG. 5), the three-way valve (A ) Is switched (S101) so as to conduct between the pipe (14) and the pipe (15), and the first three-way valve (21) is connected to the connection ports a to
The connection to the connection port c is switched (S102) and the second
The three-way valve (22) is closed (S103). As a result, as shown in FIG.
From (k), the hot water supply heat exchanger (12b) → three-way valve (A) → pipeline (15)
→ Additional heat exchanger (12a) → Pipe line (27a) → First three-way valve (21)
→ A path is formed from the pipe (29) to the washing machine (3) via the water supply pipe (61), and the pressure switch (25) is turned off in (S104) to determine the opening of the solenoid valve (30). When this is done, the water supply valve (k) is opened and the water is supplied (S105) from the water supply source of the appliance (1) (water beam operation). Next, when the control device of the washing machine (3) determines that a predetermined amount of water has been supplied and the solenoid valve (30) closes, the water flow switch is turned off (S106) and the pressure switch (25) is turned off. The ON state (S107) is detected, the water supply valve (k) is closed, and the water supply is stopped (S108). If the water pressure switch (25) remains off while the water flow switch (26) is off (S106) (S107), it is determined that the water supply is cut off and the water supply operation is stopped in this case (S1071), Perform an error display. Then, when a predetermined time has elapsed ((S109); three minutes or more in this embodiment) after the stop of the water supply in (S108), it is assumed that the control device of the washing machine has determined that the injection of the washing water for the washing process has been completed. Then, the process proceeds to the rinsing step (S23) described above. If the predetermined time has not elapsed, check whether the pressure switch (25) is in the off state.
(S1091) is detected, and the opening of the solenoid valve (30) is determined. If the solenoid valve is in the off state, the water supply is determined to be insufficient and the water jetting operation of (S105) is performed again. [Other Embodiment 1 of Cleaning Filter (23)]
3) In the cleaning, the cleaning is canceled by the manual operation of the cancel button (72) by the operator, but this embodiment shows an example in which the operation is automatically performed.

FIG. 8 shows another embodiment of the flow chart for performing the washing step of the filter (23), and the preceding and following steps are omitted because they overlap with the steps of FIGS. 5 to 7 already described. Injection of residual water from the bathtub (4) to the washing machine (3) is completed (S201 to S202), and a predetermined amount of residual water remains by the water level detector (71) provided in the bathtub (4). It is determined whether or not there is (S203). Since the residual water is still remaining in a predetermined amount, the cancel switch in the electrical unit (10) is turned ON because the residual water is continuously used,
When it has not reached the predetermined amount, it turns OFF. Step (S204)
If the answer is YES in step S203, the process returns to step (S203), and the process does not shift to the next step, and the filter (23) is not washed. This prevents the residual water in the bathtub (4) from being contaminated. Then, when the remaining water becomes equal to or less than the predetermined amount, the cancel switch is turned off, and step (S
If NO is determined in 204), the fresh water is passed through the same route as in FIG. 3 described above, and the filter (23) is washed. (S205 to S208) In the above description, the cancel switch is turned ON and OFF depending on whether or not a predetermined amount of residual water remains using the water level detector (71). The cancel switch can be turned on and off depending on whether or not. In addition to using detection signals for control by the program, various detection means such as a temperature sensor and a flow sensor for driving the burner (13) and the pump (11) are used. The cancel switch can be turned on and off depending on whether the pressure is higher or lower, or whether the pump (11) is operating. [Other Embodiment 2 of Filter (23) Washing] FIGS. 9 to 11 show that a third three-way valve (201) and a pipe (202) are newly added to the water injection unit (2) of FIG. This is an added configuration. Along with this, a drain pipe (64) is connected to the pipeline (202), and the drain pipe (64) is provided with its end opening facing the discharge section (8). In addition,
9 and 10, members and portions common to those in the configuration in FIG. 1 are denoted by the same reference numerals as in FIG. 1. FIG. 11 is a flowchart according to this embodiment. In these figures, the third three-way valve (201) is connected to the electrical unit (2) of the water injection unit (2) similarly to the first three-way valve (21) and the second three-way valve (22).
Switching is driven by the control of 0). The water injection from the bathtub (4) to the washing machine (3) is substantially the same as the water supply path of FIG. 2 already described, and the difference between this embodiment and FIG.
A third three-way valve (201) newly provided between the first three-way valve (21) and the filter (23) makes the connection port a and the connection port b conductive during cleaning. It is. Bathtub
Water injection from (4) to washing machine (3) ends (S301 to S302)
Then, the use state of the bathtub (4) is determined (S303).

The use state is determined by the following. When it is determined by the cancel button (72) or the water level detector (71) that the water remaining in the bathtub (4) is to be used, the electric unit (1)
The discharge switch in (0) is in the ON state, and it is determined as YES. If YES is determined in the step (S303), the three-way valve (A) conducts between the pipe (14) and the pipe (16) (S304), and the first three-way valve (21) is closed ( (S305), the second three-way valve (22) is switched to the connection ports a to c (S306), and the third three-way valve (201) is further switched to the connection ports a to c (S307). Then, as shown in the water flow path in FIG. 9, clean supply water introduced from the side of the appliance (1) is supplied from the pipeline (14) of the appliance (1) (S308), and the pipeline (14) → Three-way valve (A) → Pipe (16) → Pipe (27b) → Second three-way valve (22) → Pipe (27c) → Pipe (29a) →
Water is passed to the filter (23). As a result, the filter (23) is washed, and the sewage is passed through the third three-way valve (201) to the pipe (202).
→ It is discharged to the discharge part (8) through the drain pipe (64). As described above, when the residual water in the bathtub (4) is scheduled to be used, the cleaning sewage is discharged to the discharge section (8), thereby preventing the water in the bathtub (4) from being polluted. After the completion of the washing, the first three-way valve (21) is switched to the connection ports a to c, corresponding to the next water injection step (step not shown), and the second three-way valve (22), as described above. Is closed, and the third three-way valve (201) is switched from the connection port a to the connection port b.

When the discharge switch is in the OFF state and the determination in step S303 is NO, the three-way valve (A) is connected to the line (1).
4) and the line (16) are connected (S314), the first three-way valve (21) is switched from the connection port c to the connection port b (S315), and the second three-way valve is connected.
(22) is switched to the connection ports a to c (S316), and the third three-way valve (201) is switched to the connection ports a to b (S316).
317). Thereby, the water passage shown in FIG. 10 is configured. That is, clean supply water introduced from the appliance (1) side is supplied from the pipeline (14) of the appliance (1) (S308), and is supplied to the pipeline (14).
→ Three-way valve (A) → Pipe (16) → Pipe (27b) → Second three-way valve (22)
→ Pipe (27c) → Pipe (29a) → Water is passed to the filter (23). As a result, the filter (23) is washed, and the sewage passes through the third three-way valve (201), and the first three-way valve (21) → the pipe (27a) → the pipe
After (62), it is discharged to bathtub (4). As described above, in this embodiment, the cleaning of the filter (23) can always be performed, and the filter (2) can be used.
Since 3) can be maintained in the best condition, stable water injection purification can be achieved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing the entire water supply device of the present invention.

FIG. 2 is a water supply circuit diagram for explaining a water supply state in the water supply path of FIG. 1;

FIG. 3 is a water supply circuit diagram for explaining a cleaning state of a filter in a water supply path of FIG. 1;

FIG. 4 is a water supply circuit diagram for explaining a water supply state in the water supply path of FIG. 1;

FIG. 5 is a flowchart showing the operation of the water supply device of the present invention.

FIG. 6 is a flowchart showing the operation of the water supply device of the present invention.

FIG. 7 is a flowchart showing the operation of the water supply device of the present invention.

FIG. 8 is a flowchart showing another operation of the water supply device of the present invention.

FIG. 9 is a water supply circuit diagram showing a cleaning state of a filter in another water supply device of the present invention.

FIG. 10 is a water supply circuit diagram illustrating a cleaning state of a filter of the water supply device in FIG. 9;

FIG. 11 is a flowchart showing the operation of the water supply device of FIGS. 9 and 10;

[Explanation of symbols]

(1) ・ ・ ・ Instrument (22) ・ ・ ・ Second three-way valve (2) ・ ・ ・ Irrigation unit (23) ・ ・ ・ Filter (3) ・ ・ ・ Washing machine (24) ・ ・ ・ Check valve ( 4) ・ ・ ・ Bathtub (25) ・ ・ ・ Pressure sensor (11) ・ ・ ・ Pump (28) ・ ・ ・ Overpressure relief valve (21) ・ ・ ・ First three-way valve (30) ・ ・ ・ Water supply path ( 201) 3rd three-way valve (A) ... three-way valve Note that the same reference numerals in the drawings denote the same or corresponding parts.

Continued on the front page (51) Int.Cl. ⁶ Identification code FI D06F 39/10 B01D 35/02 J F24H 1/00 302 F24H 1/00 602L

Claims (2)

[Claims] 1. A water injection operation of injecting water or hot water supplied from a water supply device side into a bathtub or a water injection location, and injecting residual water in the bathtub to the water injection location through the water supply device side, The purification water injection operation in which the residual water is purified and injected by the filtration means provided in the water supply passage, and after the purification water injection operation, the clean water supplied from the water supply device side is supplied to the filtration means at the time of the water injection. And a washing operation for selectively discharging washing wastewater to the bathtub in the water supply apparatus, wherein when the cancel switch for canceling the washing operation is in an ON state, the cleaning and pouring operation is performed. A cleaning method for filtering means, wherein the cleaning operation is not performed regardless of a cleaning operation command issued later. 2. A water injection operation of injecting water or hot water supplied from a water supply device side into a bathtub or a water injection location, and injecting residual water in the bathtub into the water injection location through the water supply device side, The purification water injection operation in which the residual water is purified and injected by the filtration means provided in the water supply passage, and after the purification water injection operation, the clean water supplied from the water supply device side is supplied to the filtration means at the time of the water injection. In the water supply device, which selectively performs the washing operation performed by flowing water in the opposite direction, and in the cleaning operation, when the discharge switch for discharging sewage due to cleaning is in an OFF state, the sewage is discharged to the bathtub. The method according to claim 1, wherein, during the cleaning operation, when the discharge switch is turned on, the waste water is discharged to a discharge place different from the bathtub.