JP3333688B2 - Water supply device - Google Patents

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 supply water from a water supply source such as tap water or bathtub water to an external water supply device such as a washing machine. The present invention relates to a water supply device capable of easily detecting the presence or absence of water at a water supply source.

[0002]

2. Description of the Related Art There are a water supply device and a bath device in which hot water is poured into a bathtub and residual water from the bathtub can be poured into a washing machine or the like. These devices, for example,
27032 and JP-A-4-15017, etc., and bathtub water is poured into a washing machine according to a predetermined watering procedure. According to such a device and a water injection method, when water is poured from the bathtub to the washing machine, if there is no remaining water in the bathtub due to the water injection to the washing machine, the water can be switched to water supply from the water supply to compensate for this. It is configured. The residual state of the residual water in the bathtub is detected by a water level sensor provided in the bathtub. In recent years, there is a water injection device provided with a water amount sensor in a water injection channel for water injection into a washing machine and a water flow switch in a bathtub circulation circuit. According to such a device, the water amount sensor in the water supply channel operates, and when it detects that there is no water amount based on this, it determines whether the closing operation of the opening / closing valve of the washing machine or no residual water is present, It is cut off from the internal circuit of the device, and the bath circulation circuit is circulated by a pump, and the presence or absence of water flow is detected by a water flow switch.

[0003]

However, in the water supply device using the water level sensor in the bathtub, the water level sensor is not suitable when the water level is delicate due to the mounting state of the water level sensor and the dispersion of the water level sensor itself. It is difficult to accurately detect the water level, and furthermore, the wiring work of the signal line connecting between the bathtub side and the apparatus main body side becomes complicated. In the latter case of the water injection device using the water flow sensor and the water flow switch, the water injection circuit is switched, and the output of the water flow sensor and the output of the water flow switch are sequentially detected until the presence or absence of residual water is detected. It takes time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a first object of the present invention is to provide a simple configuration without requiring extra wiring work and installation work. It is another object of the present invention to provide a water supply device capable of detecting the presence or absence of water remaining in a bathtub during a water injection operation to a washing machine. A second object of the present invention is to provide a highly convenient water supply device capable of accurately and instantaneously detecting the presence or absence of bathtub residual water.

[0005]

In order to achieve each of the above-mentioned objects, a water supply apparatus according to a first aspect of the present invention enables water from a water supply source to be supplied to an external water supply apparatus. A water supply device in which water is injected or water is stopped based on the opening / closing operation of the on-off valve on the side of the water-receiving device, one of which is connected to the water supply source side and the other is connected to the on-off valve of the water-receiving device. A water supply passage, a pressure-sensitive detection means provided in the water supply passage for detecting pressure in the water supply passage, a water flow detection means provided in the water supply passage for detecting the presence or absence of water flow in the water supply passage; When the detection output by the detection means is low pressure and the detection output by the water flow detection means is no water flow, there is provided a determination means for determining that the water supply source injected into the water-injected device has no water. Things.

According to this solution, it is possible to inject water into an external water-supplied device, in particular, an independent water-supplied device that is independent of the present water supply device and does not exchange electric signals. During the water injection operation, the presence / absence of water from a water supply source such as a bathtub or tap water is determined by the determination means based on a combination of the detection outputs. The water flow detection means outputs an ON state and an OFF state according to a water flowing state in the water supply channel,
In the on state, it is assumed that there is water, while in the off state, it is assumed that there is no water or that the external water injection device is closed. And, when the water flow detecting means is in the off state, the output of low pressure or high pressure is made by the pressure sensitive detecting means similarly provided in the water supply channel, and when the pressure sensitive detecting means detects the low pressure, it is easy to output. It is determined that there is no water. With this water supply device, without providing a communication means between the water supply device and the water receiving device separately, simply providing the water flow detection means and the pressure sensitive detection means in the water supply path, the waterless state of the water supply source can be easily achieved. Is determined.

A water supply apparatus according to a second aspect of the present invention enables water from a water supply source to be injected into an external water-supplied device, and water is supplied or opened based on an opening / closing operation of an on-off valve on the water-supplied device side. A water supply device in which water injection is stopped, one of which is connected to a water supply source side, and the other of which is provided in the water supply channel connected to an open / close valve of the water-injected device, and is provided in the water supply channel. A check valve that sets the water supply direction to a forward direction, pressure-sensitive detection means provided in the water supply path to detect pressure in the water supply path, and presence / absence of water supply in the water supply path provided in the water supply path And a combination of a detection output of the pressure-sensitive detection means and a detection output of the water flow detection means, the opening and closing operation of the on-off valve, and the water of the water supply source to be injected into the water-receiving device. Determination means for determining the presence or absence of That.

According to this solution, it is possible to inject water into the external water-supplied device, in particular, the water-supplied device independent of the present water supply device and without the exchange of electric signals. The operation and the presence / absence of water from a water supply source such as a bathtub or tap water at the time of the operation of injecting water into the water-receiving device are determined by the determination means based on a combination of the above detection outputs. The water flow detecting means outputs an ON state and an OFF state according to a water flowing state in the water supply channel, and it is determined that there is water in the ON state, but there is no water in the OFF state or the external water receiving device is closed. It is said that he is giving a speech. And, when the water flow detecting means is in the off state, the output of low pressure or high pressure is made by the pressure sensitive detecting means similarly provided in the water supply channel, and when the pressure sensitive detecting means detects the low pressure, it is easy to output. It is determined that there is no water. When the pressure sensing means is at a high pressure, it is determined that the on-off valve is closed. The determination of the closing of the on-off valve is made such that when the on-off valve is closed during the injection of water into the water-injected device, the check valve is also closed at the same time. The water is held in a pressurized state. Accordingly, the output of the pressure sensing means is maintained at a high pressure, and it is easily determined that the valve is closed.

The present water supply device does not require any separate communication means between the water supply device and the water-injected device, but merely provides the water flow detection means and the pressure-sensitive detection means in the water supply passage. It is easy to determine that there is no water at the water supply source. The water supply device according to claim 3 of the present invention enables water from a water supply source to be injected into an external water injection device, and water injection or water injection stoppage is performed based on an opening / closing operation of an on-off valve on the water injection device side. A water supply device, one of which is connected to a water supply source side, and the other of which is provided in the water supply passage connected to an on-off valve of the water-supplied device, and the water supply passage, and controls the pressure in the water supply passage. A first threshold value and a second threshold value larger than the first threshold value are set for the pressure sensing means for sensing, and the detected pressure of the pressure sensing means, When the detected pressure becomes larger than the second threshold during the water injection operation to the water injection device, it is determined that the on-off valve has closed, and the detected pressure is equal to the first threshold and the second threshold. If the value is between 2 and the threshold value, the on-off valve is open and the Determining means for determining that water is being injected into the water-injected device, and further determining that there is no water from the water supply source when the detected pressure is smaller than the first threshold value; It is a thing.

According to this solution, since two thresholds are set for the detection pressure of the pressure sensing means, the determination means determines that there is no water at the water supply source in accordance with these thresholds. Is easily determined. The water supply device according to claim 4 of the present invention, in addition to the water supply device according to any one of claims 1 to 3, when the determination unit determines that there is no water from the water supply source, Water supply source switching means for switching to water supply from another water supply source is provided in the water supply passage. According to this solution, when it is determined that there is no water at the water supply source from the water supply source, water from another water supply source is switched, so that a convenient water supply device can be obtained.

[0011]

As described above, the present invention according to claim 1 of the present invention is directed to an external water receiving device, particularly to a water receiving device independent of the present water supply device and having no exchange of electric signals. Water can be injected, and the presence or absence of water from a water supply source such as a bathtub or tap water is determined by a combination of the above detection outputs during the operation of injecting water into the device to be injected.
In the present water supply device, it is sufficient to provide a pressure sensing means and a water flow detection means for these detections in the water supply channel, and this water supply channel connects the water supply source side and the water injection device side. Thus, the main water supply apparatus and the water receiving apparatus side may be connected only by the water supply path, and the main water supply apparatus and the water supply source side may be connected only by the water supply path. Therefore, there is no need for any electrical wiring work between the water supply device and the water supply device or the water supply source. Therefore, in accordance with the first object of the present invention, it is possible to obtain a water supply device having a simple configuration without the need for installation and wiring work.
And since the present water supply device performs pressure sensing detection and water flow detection in the water supply channel, and furthermore, the presence or absence of water at the water supply source is determined by a combination of both detection outputs,
Since there is no influence from the mounting state of the detection means provided on the water supply side and the variation of the detection means itself as in the past, and there is no exchange between the device side and the water supply side, it takes time to perform such processing. Is not required. Therefore, in accordance with the second object of the present invention, it is possible to obtain a highly convenient water supply device that can be accurately detected and instantaneously detected and determined.

According to a second aspect of the present invention, similarly to the first aspect, water from a water supply source can be injected into an external water-supplied device, and the on-off valve of the water-received device is opened and closed. This is a water supply device in which water injection or water injection stop is performed in conjunction with the opening / closing operation. Further, as a feature of the second aspect of the present invention, a check valve is provided in the water supply passage. Thereby, in addition to the determination that there is no water at the water supply source, the open / close operation of the on-off valve is also determined. Therefore, similarly to the water supply device according to the first aspect, no wiring work or the like is required between the present water supply device and the counterpart device, and the detection is instantaneous, and no time is required for the processing. Therefore, also in the present water supply device, a highly convenient water supply device having a simple configuration can be obtained corresponding to the first and second objects of the present invention.

According to the third aspect of the present invention, it is possible to easily determine the absence of water at the water supply source only by the pressure sensing means provided in the water supply channel. Means only the connection of the water supply channel. Therefore, also in the present water supply device, a highly convenient water supply device having a simple configuration can be obtained corresponding to the first and second objects of the present invention.

According to a fourth aspect of the present invention, in the water supply apparatus according to any one of the first to third aspects, when it is determined by the determination means that there is no water from the water supply source, A water supply source switching means for switching to water supply from another water supply source is provided. For example, in a case where water in a bathtub is supplied to a water injection device as a water supply source, the water supply source is switched from the bathtub to the tap water when the bathtub water runs out halfway. Thereby, the water can be smoothly supplied to the water receiving device side, and a highly convenient water supply device can be obtained.

[0015]

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 equipment (1) includes a reheating heat exchanger (12a) and a hot water supply heat exchanger (12
b) and a reburning burner (13a) and a hot water supply burner (13b) for heating these, and a circulation pump (11).
Are arranged. Further, the appliance (1) has an electrical unit (10) for switching the inside of the pipe (14) to a circulation state or a hot water supply state, or for controlling the operation of the pump (11) and the burners (13a) and (13b).
Is installed. The pipe (14) refers to the entire pipe in the device (1).

The water injection unit (2) includes an appliance (1), a bathtub (4),
It is provided between the washing machines (3) so as to be detachable therefrom. The water injection unit (2) switches the water or hot water supplied from the appliance (1) to the external bathtub (4) or washing machine (3) as appropriate, or supplies water to the bathtub (11) using the pump (11) of the appliance (1). Supply the remaining water from 4) to the washing machine (3). For this reason, the water injection unit (2) has a pipe (27a) and a pipe (27b) connected to the pipe (15) and the pipe (16) from the appliance (1), and the first three-way A pipe (29) and a pipe (27c) connected via a valve (21) and a second three-way valve (22) are provided, and the first three-way valve is provided.
The water supply path is appropriately selected by switching between (21) and the second three-way valve (22). From the water injection unit (2) to the bathtub (4), the pipes (62) and (63) are connected to the pipes (27a) and (27b), and the water injection unit (2) is connected to the washing machine ( To (3), a water supply pipe (61) is connected to the pipe (29) to supply water or hot water. In the water injection unit (2), in the middle of the pipe (29), when the water supply direction, that is, the direction toward the washing machine (3) is the forward direction, when the water supply pressure is generated in the forward direction, the valve is attached in the valve closing direction. A check valve (24) that opens against the biasing spring (24a) is provided, and further in the pipe (29), a pipe (29) is provided downstream of the check valve (24). A pressure switch (25) for detecting the water pressure in the) is provided. And even a pressure switch
On the downstream side of (25), a water flow switch (26) for detecting the presence or absence of water flow in the pipeline (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). In the pipe (27a), between the connection port a side and the connection port b side of the first three-way valve (21), when the solenoid valve (30) is closed at the time of a water injection operation to the washing machine, the water supply pipe (61) is closed. ), Pipeline (29),
A bypass (27d) provided with an overpressure relief valve (28) bypasses the first three-way valve (21) and is connected in parallel so that the water pressure in the pipe (15) does not rise excessively. 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.

According to the above configuration, the operation of filling the bathtub (4) with water is first selected by the remote controller (51) of the appliance, and the water injection unit (10) is controlled by the electrical units (10) and (20). 2) The first three-way valve (21) and the second three-way valve (22) are electrically connected between the connection port a and the connection port b, and the supply water introduced from the water supply source, that is, the flush water is supplied to the appliance (1). When passing through the hot water supply heat exchanger (12b) from the hot water supply heat exchanger (12b) through the hot water supply burner (13b), the hot water is heated by the combustion heat of the hot water supply burner (13b). ) And supplied to the bathtub (4) and the pipeline (16),
The water is supplied to the bathtub (4) via the pipe (27b) and the pipe (63).

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. Fig. 2 shows the state of water supply from the bathtub (4) to the washing machine (3), Fig. 3 shows the washing state of the filter (23),
FIG. 4 shows a water supply state in which washing water is supplied to the washing machine (3). FIG. 5 is an explanatory diagram showing an operation state based on detection outputs of the pressure switch (25) and the water flow switch (26) of the present embodiment. FIGS. 6 to 8 are flowcharts for explaining the operation of supplying water to the washing machine (3) according to the present embodiment. FIG. 6 is a flow chart showing the steps of supplying remaining water from the bathtub (4) as washing water. 7 shows a water supply step for rinsing, and FIG. 8 shows a step of supplying water as washing water. FIG. 9 is an operation explanatory diagram illustrating the operation state of the pressure switch (25) in another embodiment. [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 6, first, the first three-way valve (21) conducts (S3) through the connection ports a to c, and the second three-way valve (22) conducts through the connection ports b to a (S4). ). Then, in (S5), the pressure switch (25) detects that the solenoid valve (3
When the valve opening of (0) is determined, the pump (11) operates (S6) and the bathtub
The remaining water from (4) goes to pipeline (63) → pipeline (27b) → pipeline (16) →
After passing through the water supply circuit of the pump (11) → reheating heat exchanger (12a) → pipe (15) → first three-way valve (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). Accordingly, the water flow switch (26) of the pipe (29) is turned on from the off state.

By the way, as is apparent from the example shown in FIG.
(3) is provided with an electromagnetic valve (30) as opening / closing means, 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 solenoid valve (30) in the washing machine (3) is operated by the pressure switch (25).
Is detected, and based on this, the water supply control of the present water supply device is performed. Here, apart from the above steps, the operation of the present apparatus accompanying the opening / closing operation of the solenoid valve (30) will be described in advance. The pressure switch (25) is located inside the connected pipe (29) and the water supply pipe (61), and is further provided with a check valve (2).
It is substantially held in a sealed area (64) defined between 4) and the solenoid valve (30). The pressure switch (25) is
When (29) is in a water-flowing state and has a low pressure, the threshold value is set to be off. Bathtub by pump (11)
In the remaining water supply from (4), the solenoid valve (30) on the washing machine (3) side is in the open state, and the check valve (24) is actuated by the water supply pressure in the forward direction, and the water flow is reduced. Because of the occurrence, the valve-open state is maintained. In this state, the pressure switch (25) is off.

Next, 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 is applied by the pump (11) in 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). And check valve (24)
The pressure difference between the upstream part and the downstream part is no longer generated, and the check valve (24) is closed by the urging force of the spring (24a). The pump (11) stops upon detection of valve closing, but the solenoid valve (30) and the check valve (2
Water is held in a pressurized state in the sealing area (64) defined by 4) and the pressure is higher than when water is passed, and the pressure switch (25) disposed in the sealing area (64) Are maintained in an on state under a pressurized state. Thereafter, when the solenoid valve (30) determines that the control device of the washing machine (3) needs to supply the washing water, the valve is automatically opened on the washing machine (3) side. As a result, the pressurized state of the sealed water in the sealing area (64) is released, so that the sealing area (64) is released.
The water pressure in (64) decreases, the pressure switch (25) detects a pressure lower than a predetermined threshold value, and turns off, and the water supply device detects the opening of the solenoid valve (30). When the pump (11) is actuated based on this valve opening detection, the check valve (24) opens and the water is passed.

Now, return to the steps of FIG. 6 again. When the water flow switch (26) is turned on, there is water in the bathtub (4) and the water is flowing.When the water flow switch (26) is turned off and there is no water flow (S7), the pressure switch (25) is turned on. (S8), a predetermined amount of remaining water is supplied into the washing machine (3), and the control device of the washing machine (3) is operated by the solenoid valve.
It can be recognized that (30) has been closed. In this case, this corresponds to (b) in FIG. 5, and accordingly, the pump (11) stops (S9).
Is done. In (S8), when the pressure switch (25) is kept off even when there is no water flow (S7), that is, when both the water flow switch (26) and the pressure switch (25) are off, the bathtub It is determined that the water inside has run out. This is shown in FIG.
The bathtub (4) has no water to supply to the washing machine (3). In this embodiment, the pump (11) is stopped (S81) based on the determination that there is no water in the bathtub, the mode is switched to the "wash water mode" in FIG. 8 described later, and the process proceeds to step (S101).

Here, in this embodiment, the detection signals of the pressure switch (25) and the water flow switch (26) are transmitted by the electric transmission unit.
The state is sent to (20), and the above states are determined based on these detections. By detecting the output of the pressure switch (25), it is possible to know the opening operation and the closing operation of the solenoid valve (30), and as shown in FIG. 5, by detecting the presence or absence of water flow of the water flow switch (26). , From the combination of these detections,
The bathtub (4) is configured so that the user can easily know that there is no water in the bathtub (4). In the above description, the operation of the pump (11) corresponds to the operation of injecting a claim. In each of the steps (S7) to (S8) in the above-described embodiment, the presence or absence of water in the bathtub (4) is determined when the bathtub water from the bathtub (4) is injected into the washing machine (3). (S24) to (S25) and (S105) to (S1
In 06), it is shown whether or not the water supply was cut off when the washing water (3) was being poured from the tap water during the water injection operation. In the above embodiment, the check valve (24) is provided in the pipeline (29) to detect the opening operation of the solenoid valve (30) by the pressure switch (25). Check valve (24)
The sealing region (64) is formed with the solenoid valve (30) due to the presence of the pressure switch (30), and the pressure switch (25) is maintained in the ON state while a predetermined pressure is applied. However, as evident above, the solenoid valve (30)
Due to the closing operation of the pipe (29), the water pressure rises, and the increased water pressure can be detected by the pressure switch (25), so if attention is paid to the detection itself of the closing operation of the solenoid valve (30), it is not necessarily There is no need to provide a check valve (24). That is, even when the check valve (24) is not provided in the water supply passage (29), the closing operation of the solenoid valve (30) itself is detected by the combination of the detection outputs of the pressure switch (25) and the water flow switch (26). At the same time, it is possible to know that there is no water from the bathtub (4).

Now, return to the step, and then in (S9) the pump
After the stop of (11), a predetermined time has elapsed ((S10);
Min), the control device of the washing machine determines that the injection of the washing water for the washing process is completed, and proceeds to the filter (23) washing process (S11) to (S13). It is determined whether or not the pressure switch (25) is turned off (the solenoid valve (30) is opened) (S10a). When the pressure switch (25) is turned off, the washing machine
(3) The amount of water supply is insufficient, and the pump is turned on to perform the water supply operation again (S10b), and then returns to (S7).

In the filter (23) washing step, as shown in FIG. 3, 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) is switched from the connection port a to the connection port c (S12), and the water beam operation of (S13) is performed. In other words, the flush water introduced from the tap water after the water supply valve (k) is opened is supplied from the line (14) of the appliance (1), and the line (16) → the line
(27b) → Second three-way valve (22) → Pipe (27c) → Water supply path (29) → Filter (23) → Pipe (27a) → First three-way valve (21) → Via pipe (62) Is discharged into the bathtub (4), whereby the filter (23) is washed. In this washing step, when the flow counter (not shown) counts up to 5 liters, the water supply valve (k) is closed to stop water supply. [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 cleaning step (S13) is completed, the first three-way valve (21) is connected to the connection ports a to c.
(S20) and the second three-way valve (22) is plugged.
(S21) is performed. As a result, as shown in FIG. 4, the water supply path passes from the water supply valve (k) of the pipe (14) of the appliance (1) to the heat exchanger (1).
2b) → heat exchanger (12a) → pipe (15) → first three-way valve (21) → water supply path (29) → path to washing machine (3) via water supply pipe (61) is formed. Here, when the control device of the washing machine (3) opens the solenoid valve (30) to perform the rinsing process, it is determined that the pressure switch (25) is off (S22), and the water supply of the appliance (1) is performed. The valve (k) is opened and water is supplied from the tap water (S23) (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 (S24) and the pressure switch (25) detects the on state (S25) ((b) in Fig. 5), the solenoid valve (30) is closed. Then, the water supply valve is closed and the water supply is stopped (S26). Water switch off
(S25) When the pressure switch (25) is off, the solenoid valve (30) is closed and there is no water supply (FIG. 5).
(A)), that is, it is determined that the water supply is cut off, the water supply valve (K) is closed, the water beam operation is stopped (S251), and an abnormality display (S29)
I do.

When the rinsing operation of the washing machine (3) is repeated again, the solenoid valve (30) is opened and the pressure switch (25) is turned off (S27). Return to the routine of (S23). Step (S26)
A predetermined time has elapsed since the first stop of water supply (2 in this embodiment).
If it is determined that the pressure switch (25) is in the ON state (0 minutes or more) (S27) and (S28), it is determined that the rinsing step in the washing machine has been completed. Until the elapse of 20 minutes, it is determined that the rinsing process is in the middle, and every time it is determined that the solenoid valve (30) has been opened by turning off the pressure switch (25) (S23)
Return to the routine and perform water spray for rinsing. [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. 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. 6), first the first three-way The valve (21) is switched to conduction to the connection ports a to c (S101), and the second three-way valve (22) is closed (S10).
2) is done. As a result, as shown in FIG. 4, the water supply path passes from the water supply valve (k) of the pipe (14) of the appliance (1) to the heat exchanger (1).
2b) (12a) → Pipe (15) → Pipe (27a) → First three-way valve (21) → Water supply path (29) → Route to washing machine (3) via water supply pipe (61) is formed. In (S103), when the pressure switch (25) is turned off and the solenoid valve (30) is determined to be open, the water supply valve (k) is opened and the tap water is supplied from tap water (S104). (Water beam operation). It should be noted that the steps of the "wash water mode" (S101) and subsequent steps are also continued from the already described step of (S81) in FIG. In that case, fill the bathtub with water from the bathtub (4) into the washing machine (3).
It is when it is determined that there is no water in (4). That is, the electrical unit (20) determines that there is no water in the bathtub (4) based on the OFF state of both the detection outputs of the pressure switch (25) and the water flow switch (26). Water mode ”. Accordingly, the first three-way valve (21) switches to conduction to the connection ports a to c (S10
1), the second three-way valve (22) is closed (S102).

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) is closed, the pressure switch (25) is turned on (S106). Is detected, and the water supply valve (k) is closed to stop water supply (S107). If the water pressure switch (25) remains off (S106) while the water flow switch (26) is off (S105), the water supply is cut off (FIG. 5).
(A)) and the water supply operation is stopped in this case as well.
(S1061), and an error display is performed. When the predetermined time has elapsed ((S108); 3 minutes or more in this embodiment) after the stop of the water supply in (S107), 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. Already explained (S2
2) Proceed to the rinsing process. If the predetermined time has not elapsed, whether the pressure switch (25) is in the off state (S10
81) is detected and the opening of the solenoid valve (30) is determined.

In the above embodiment, the pressure switch (25)
And the combination of the detection output of the water flow switch (26)
Although the absence of water from the bathtub (4) or tap water is detected, another embodiment in which only the pressure switch (25) is used will be described below with reference to FIGS.
In the above embodiment, the threshold value of the detection pressure of the pressure switch (25) is set to one value that is turned off when the water is passed. In this embodiment, the threshold value of the pressure detected by the pressure switch (25) is set as two threshold values P1 and P2. The set value of the threshold value is shown in FIG.
(4) Or the state without water from the water supply, (b) the state of water flow to the washing machine (3), and (c) the closing of the solenoid valve (30). The flowchart of FIG. 10 corresponds to a part of the flow of FIG. 6, and specifically, steps (S7) and (S7) of FIG.
8) is replaced by (S7a) and (S8a). In step (S7a), the detected pressure of the pressure switch (25) is P2
Is determined, and if the pressure exceeds P2, it is determined that the solenoid valve (30) has closed, and FIG.
Go to step (S9). If the detected pressure is lower than P2, the process proceeds to step (S8a), and it is determined whether the pressure is lower than P1. If the pressure is lower than P1, it is determined that there is no water in the bathtub (4) (FIG. 6).
Go to step (S81). If the pressure exceeds P1, the process returns to the routine of (S7a) again. During this time, the detected pressure is between P1 and P2, and the flow is continued, assuming that the water is flowing.

The present invention is not limited to the above-described embodiment, but may be freely changed in design within the scope of the present invention. Although the water supply device shown in FIG. 1 is configured such that the appliance (1) and the water injection unit (2) are separate units, they may be configured as a water supply device provided integrally therewith. As the water injection unit (2), the first and second three-way valves (2
1), (22) and a predetermined pipe line. For example, a pump (11) (provided on the instrument (1) side) is further connected to a water injection unit.
(2) It may be provided on the side. On the other hand, in this embodiment, the pressure switch (25) and the water flow switch (26) are
(2) Connected to the electrical unit (20) on the side. The electrical unit (20) determines whether the solenoid valve (30) of the washing machine (3) is open or closed, no water, or the like, based on the combination of the respective detection outputs. The electrical unit for performing such operations may be operated by the electrical unit (10) on the side of the appliance (1), or may be an electrical unit integrating these electrical units (10) and (20) (not shown). . Further, the water flow switch (26) is provided on the water injection unit (2) side in the illustrated example, but may be provided on the device (1) side, for example, at a portion (26a) shown by a broken line in FIG. In addition, the water flow switch (26) and the pressure switch (25) must be installed at least from the water source (from the bathtub (4) or water supply) to the solenoid valve.
There is no particular limitation as long as it is provided in the water supply path leading to (30).

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an entire water supply device according to an embodiment 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 water supply state in the 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 an explanatory diagram showing a combined state of detection outputs of a pressure switch and a water flow switch according to an embodiment of the present invention.

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

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

FIG. 8 is a flowchart showing the operation of the water supply device according to the embodiment of the present invention.

FIG. 9 is an explanatory diagram showing an operation state of a pressure switch according to another embodiment of the present invention.

FIG. 10 is a flowchart showing an operation of a water supply device according to another embodiment of the present invention.

[Explanation of symbols]

(1) ・ ・ ・ Instrument (22) ・ ・ ・ Second three-way valve (2) ・ ・ ・ Irrigation unit (24) ・ ・ ・ Check valve (3) ・ ・ ・ Washing machine (25) ・ ・ ・ Pressure switch (4) ... bathtub (26) ... water flow switch (11) ... pump (29) ... pipe (21) ... first three-way valve (30) ... solenoid valve The same reference numerals in the drawings indicate the same or corresponding parts.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E03C 1/01 D06F 39/08 301 F24H 1/00

Claims (4)

(57) [Claims] 1. A water supply device in which water from a water supply source can be injected into an external water injection device, and water is injected or water injection is stopped based on an opening / closing operation of an on-off valve on the water injection device side. A water supply channel connected to the water supply source side and the other is connected to the on-off valve of the water-injected device; and a pressure-sensitive detecting means provided in the water supply channel and detecting pressure in the water supply channel. A water flow detecting means provided in the water supply path, for detecting the presence or absence of water flow in the water supply path; and a detection output by the pressure-sensitive detection means is low pressure, and a detection output by the water flow detection means is no water flow. Determining means for determining that there is no water in the water supply source to be injected into the water-supplied device. 2. A water supply device that allows water from a water supply source to be injected into an external water injection device and that performs water injection or water injection stoppage based on the opening / closing operation of an on-off valve on the water injection device side. A water supply path connected to the water supply source side and the other side connected to the open / close valve of the water-injected device; and a check valve provided in the water supply path, wherein a water supply direction of the water supply path is a forward direction. A pressure sensing means provided in the water supply passage for detecting pressure in the water supply passage; a water flow detection means provided in the water supply passage for detecting the presence / absence of water flow in the water supply passage; By the combination of the detection output of the pressure detection means and the detection output of the water flow detection means, the opening and closing operation of the on-off valve,
Determining means for determining whether there is water from the water supply source to be injected into the water injection device. 3. A water supply device that allows water from a water supply source to be injected into an external water injection device, and performs water injection or water injection stoppage based on an opening / closing operation of an on-off valve on the water injection device side. A water supply channel connected to the water supply source side and the other is connected to the on-off valve of the water-injected device; and a pressure-sensitive detecting means provided in the water supply channel and detecting pressure in the water supply channel. A first threshold value and a second threshold value larger than the first threshold value are set with respect to the detection pressure of the pressure-sensitive detection means, and when a water is injected into the water-receiving device, When the detected pressure is greater than the second threshold, it is determined that the on-off valve has closed, and the detected pressure is determined by the difference between the first threshold and the second threshold. When it is in the middle, the on-off valve is in the open state, It is determined that the vehicle is underwater, and the detected pressure is the first
And a determining means for determining that there is no water at the water supply source when the water supply value becomes smaller than the threshold value. Further, when it is determined that there is no water of the water supply source in the water supply channel by the determination of the determination means,
The water supply device according to any one of claims 1 to 3, further comprising a water supply source switching unit configured to switch to water supply from another water supply source.