JP2699254B2 - Bath equipment abnormality detection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting an abnormality in a bath apparatus, and more particularly to a method for detecting an abnormality when a pump incorporated in a bubble bath apparatus or the like does not operate properly.

[0002]

2. Description of the Related Art In recent years, bath apparatuses have become widespread in which air bubbles can be jetted into a bathtub in order to improve a bathing effect such as recovery from fatigue and health promotion. As shown in FIG.
The lower end of the bathtub (B) is connected to the upstream end of the return path (1b) forming the circulation circuit (1), while the downstream part of the outward path (1a) forming the circulation circuit (1) is connected to the bathtub (1). B) are connected to discharge ports (12) (12) formed on the back and foot side walls. The circulation circuit (1) is provided with a so-called non-self-priming circulation pump (P ₀₁ ) which needs to be operated after bleeding air from the circuit. The reason why the non-self-priming type circulation pump (P ₀₁ ) is used is that if the self-priming type pump, which requires a large capacity, is made a self-priming type, the size of the apparatus will increase. A filling circuit (3a) drawn from the water heater (4) is connected to the suction side of the circulation pump ( _P01 ).

[0003] Further, the circulation circuit (1) with forced circulation circuit formed so as to bypass a portion of the circuit (1 _C) is connected, to the forcible circulation circuit (1 _C) is Bath heat exchanger
(11) is provided. And the above forced circulation circuit (1 _C )
A small-sized self-priming circulating pump (P ₀₂ ) of a type that can be operated without bleeding air from the circuit is inserted into the pump.

Further, an air suction circuit (13) for sucking outside air is connected to discharge ports (12) (12) formed in the side wall of the bathtub (B) through an on-off valve (14). ing. When filling the bathtub (B) with water, first turn on the water heater until the discharge port (12) is submerged.
(4) actuating the circulation pump of the non-self-priming (P ₀₁₎ after hot water into the bathtub (B) from. As a result, air that may be trapped in the portion where the water level sensor (18) (usually composed of a water pressure gauge) provided near the discharge port (12) is placed in the bathtub
(B), thereby ensuring the detection of the water level in the bathtub (B) by the water level sensor (18). And
After the air is evacuated, the hot water is supplied from the water heater (4) to the bathtub (B) while monitoring the water level with the water level sensor (18), and the filling operation is advanced.

When the self-priming circulating pump (P ₀₂ ) is operated after the completion of the filling, the suction port (B ₁ ) at the lower part of the bathtub → return path
(1b) → Circulation pump (P ₀₁ ) → Circulation pump (P ₀₂ ) → Bath heat exchanger (11) → Discharge port (12) → Forced circulation and heating of bath water in the circuit connected to the bathtub (B) The inside of the bathtub (B) is refired. When the circulation pump (P ₀₂ ) is stopped and the other circulation pump (P ₀₁ ) is operated and the on-off valve (14) is opened, the bath water circulates in the circulation circuit (1), The outside air is sucked from the air suction circuit (13) by the ejector effect of the jet water spouting from the discharge ports (12) and (12) into the bathtub (B), and is spouted into the bathtub (B). This allows
The inside of the bathtub (B) becomes a bubble bath.

However, in this case, the circulation circuit (1)
When air was mixed in the stagnant water in the upstream circuit of the non-self-priming circulation pump (P ₀₁ ) inserted in the circulating pump (P ₀₁ ), the circulation pump (P ₀₁ ) was operated to perform hot water filling and bubble operation. At this time, air is caught in the pump (P ₀₁ ), and this does not function. As a countermeasure in such a case, when air is trapped in the circulating pump (P ₀₁ ), the bath device is forcibly stopped, and an error display or the like is provided on a display (not shown) for instructing an operation of restoring the abnormal state. Is also conceivable. For example, the fact that the operation of the hot water switch is required is displayed on the display. When you operate the hot water switch,
A predetermined amount of hot water is forcibly supplied from the water heater (4) to the bathtub (B) through the outward path (1a) and the return path (1b) of the circulation circuit (1), whereby the non-self-priming circulation is performed. The return path (1b) and the like located upstream of the pump (P ₀₁ ) are in a state where air is vented. Therefore, when the circulating pump (P ₀₁ ) is operated again with the air removed, the inside of the bathtub (B) becomes a bubble bath state as described above.

[0007] However, as described above, if the device is forcibly stopped, an error display or the like (hereinafter, the process is referred to as an error process) suddenly occurs, a user of the device with poor technical knowledge cannot quickly respond to this. Therefore, even when the non-self-priming circulating pump does not operate properly, it is not preferable to immediately perform error processing as described above, and it is desirable to reduce the occurrence of the error as much as possible.

[0008] The present invention has been made in view of the above, "bathtub discharge port formed in a configuration wall (B) (12) and the suction port (B ₁₎ Connect and non-self-priming circulating pump A filtration circuit (2) provided so as to return from the outlet side of the circulation pump to the entrance side of the circulation pump in the circulation circuit (1), and having a filtration vessel (20) inserted therein;
A forced circulation circuit (1c) formed so as to bypass a part of the circuit on the outlet side of the circulation pump in the circulation circuit (1) and including a bath heat exchanger (11) and a self-priming circulation pump. )), When the air is _{trapped in} the circulation pump (P _o1 ), after performing the recovery operation in which both the filtration circuit (2) and the circulation circuit (1) are vented. An object of the present invention is to determine whether or not an error is present and to reduce the frequency of occurrence of errors.

[0009]

The technical means of the present invention for solving the above-mentioned problems is as follows: "The filtration circuit (2) is connected to a water supply, and the backwashing of the filtration vessel (20) is performed by switching a predetermined flow path. the backwashing device for discharging to the outside of the circulation circuit consecutively provided with, together with the circulation pump of the non-self-priming is provided water flow detection means for detecting a water flow occurring upon actuation of the non-self-priming During the operation of the circulation pump, the output of the water flow detection means was monitored, and when no water flow detection signal was generated from the water flow detection means after operating the non-self-priming circulation pump, the backwashing device was operated. Thereafter, the flow path is switched so that the flow of the filtration circuit (2) is in the forward direction, and the self-priming circulating pump inserted into the forced circulation circuit (1c) for reheating is operated. A suction-type circulation pump and a self-priming-type circulation pump A predetermined number of times repeated the operation with to each other operated, when the water flow detection signal from the water flow detecting means even after returning the predetermined number of times repeated does not occur is the "it possible to determine an abnormality.

[0010]

The above technical means operates as follows. When the non-self-priming circulation pump is operated, the path including the filtration circuit (2) (the filtration vessel (20)) is also circulated by the non-self-priming circulation pump. If the water flow detection means does not output a water flow detection signal at this time, it is considered that air is mainly trapped in the non-self-priming circulation pump in the circulation circuit (1) and the like. Although there are various possible causes of the air entrapment, air is particularly likely to be entrained in the filtration container (20), and this air is often sucked by the non-self-priming circulating pump to cause the air entrapment. . Therefore, in the above case, the non-self-priming circulating pump is stopped, and the backwashing device is operated to bring the filtration vessel of the filtration circuit (2) into the backwashing state. The inside of the filtration circuit (2) including the filtration container (20) is air-purged by the backwashing operation. Thereafter, the self-priming circulation pump inserted into the forced circulation circuit (1c) for additional heating is operated. Then, even when air stays in a part of the water circuit on the upstream side of the circulation pump, the bathing water is sucked by the circulation pump, and the circuit up to the circulation pump is air-purged.

As a result, the bath water in the bathtub (B) flows into the circulation circuit (1) from the suction port (B ₁ ) formed in the bathtub (B), and the non-water is disposed in the circuit. After passing through the self-priming circulation pump, the gas flows from the discharge side to the self-priming circulation pump in the forced circulation circuit (1c). That is, the circuit connected to the non-self-priming circulating pump on the downstream side can be evacuated from the suction port (B ₁ ) of the bathtub (B), and the circuit is filled with water.

The non-self-priming circulating pump (the pump provided in the circulating circuit (1)) is turned on again in place of the self-priming circulating pump. When the signal is not output, the self-priming circulation pump and the non-self-priming circulation pump are alternately operated, and the water flow detecting means detects the water flow even if the number of times of operation of the non-self-priming pump reaches a predetermined number. If not detected, it is determined to be in an abnormal state. As described above, according to the above technical means, when air is trapped in the non-self-priming circulating pump, the pump and the circuit connected to the pump are evacuated, that is, once the recovery operation is automatically performed. It can be determined whether or not the state is abnormal.

As described above, according to the above technical means, when air is trapped in the non-self-priming circulating pump, the pump and the circuit connected thereto are evacuated, that is, the recovery operation is automatically performed once. After performing the operation, it can be determined whether or not the state is abnormal.

[0014]

The present invention has the following specific effects. If air is trapped mainly in the non-self-priming circulating pump in the circulating circuit (1) or the like, an error occurs because the recovery operation is automatically performed once and then it is determined whether or not it is in an abnormal state. The frequency is reduced, and stable operation of the entire bath apparatus can be secured. Especially,
Filtration vessel (2) circulated by non-self-priming circulation pump
Although it is easy for air to enter the filtration circuit (2) containing 0),
Since the air bite caused by the air in this portion is eliminated in the first stage of the detection operation, the frequency of occurrence of the error is further reduced.

[0015]

Next, an embodiment of the present invention will be described in detail with reference to FIG. The bubble bath apparatus employing the method of this embodiment employs the configuration shown in FIG. 2, and the basic configuration is the same as that of the above-described conventional example. In the bathtub (B), the discharge port
(12) Foot outlet (12a) and back outlet corresponding to (12)
(12b), and each discharge port has a forward path of the circulation circuit (1).
The branch circuits of (1a) are separately connected. Tub suction port (B) (B ₁₎ backward from (1b) is connected to the inlet side of the circulation pump of a large capacity non-self-priming (P _1), the outlet side of the circulation pump (P ₁₎ The forward path (1a) to be connected is branched at the branch point (Q), one of which is connected to the foot-side discharge port (12a), and the other is connected to the back-side discharge port (12).
b) to form a circulating circuit (1). The discharge ports (12a) and (12b) have an air suction circuit (1).
The downstream branch circuits of 3) are separately connected, and the path to the discharge port of the air suction circuit (13) is opened and closed by an on-off valve (14) inserted upstream of the branch point.

A filtration circuit provided in parallel with the circulation circuit (1)
(2) is a configuration in which a filtration container (20) is inserted as in the conventional example,
An inlet side and an outlet side of both ends a circulation pump filtration container (20) (P ₁₎ is connected, filtration direction of the filter container (20) is a circulating pump
This coincides with the forward direction of the circulation circuit according to (P ₁ ). In addition, a switching valve (31) is provided at the outlet side of the filtration vessel (20) in the filtration circuit (2).
However, a switching valve (32) is provided on the inlet side of the filtration vessel (20), a backwash circuit (3b) is connected to the switching valve (31), and a discharge circuit (3) is connected to the switching valve (32). 3c) is connected.

The bubble bath apparatus includes a water heater (4) and a bath heat exchanger (11). The water heater (4) is
The bypass circuit (4) from the water supply pipe (41) on the inlet side to the heat exchanger
3) is combined with a circuit to be heated (42) via a heat exchanger, which is a so-called bypass mixing method. Therefore,
By controlling the distribution amount by the control valve (46) inserted at the branch point of the water supply pipe (41) and the bypass circuit (43), the temperature of the hot water from the hot water circuit (44) is maintained at the set temperature.

In this embodiment, the branch circuit (45) from the water supply pipe (41) is also joined to the filling circuit (3a) branched from the tapping circuit (44), and the switching control is performed at this junction. Valve (33) is inserted. This switching control valve (33) is
The opening degree is controlled by (M) .In this embodiment, the amount of hot water to the filling circuit (3a) can be controlled, and the filling circuit (3a) and the tapping circuit (44) side or branch circuit can be controlled. (45) side can be selectively communicated. Therefore, only the hot water circuit (3a) and the branch circuit (45) can be communicated to supply tap water to the bathtub (B) as it is, and in this case, the circuit to be heated (42) can be filled with cold water. Since there is no hot water, the cold water sand phenomenon is unlikely to occur at the time of hot water supply again.

The filling circuit (3a) includes a filling valve (30), a flow counter (34) for measuring a filling flow rate, and a pressure feeding hopper (5).
Are inserted in this order, and the downstream end thereof is connected to the upstream side of the self-priming pump (P ₂ ) of the forced circulation circuit (1c) for circulation heating described later. A switching valve (35) is provided at the junction of the filling circuit (3a) and the forced circulation circuit (1c). This switching valve (35) is in a state in which the filling circuit (3a) is shut off and only the forced circulation circuit (1c) is connected, and the filling circuit (3a) is in a forced circulation circuit (1c). In this configuration, the pump (P ₂ ) and the circulation switching valve (15) are connected to both sides.

The pressure feed hopper (5) includes a valve device (52) housed in a valve chamber (51) in a casing (50), and an air chamber (53) connected to the valve chamber and opened to the atmosphere. ). An air suction port (54) is opened in a partition wall between the valve chamber (51) and the air chamber (53), and a valve seat port (55) is provided at a position facing the air suction port (54) and at an inlet of the valve chamber (51). ) Opens, during which time
A valve device (52) including a valve body facing the air suction port (54) and the valve seat port (55) is incorporated. The valve device (52) is always operated by a spring (not shown).
(55) is closed and the air suction port (54) is urged to open, and the water seat circuit (3a) opens the valve seat port (55) and closes the air suction port (54). Is a form that works as follows.

A downstream circuit (3a ₁ ) of the filling circuit (3a) is connected to the side wall of the valve chamber (51).
a ₁ ) and the air chamber (53) are connected to the communication pipe (57) into which the drain valve (56) is inserted.
Are connected to each other. The forced circulation circuit (1c) is a self-priming pump between the circulation switching valve (15) inserted in the back circuit of the circulation circuit (1) and the circulation switching valve (16) inserted in the foot circuit.
(P ₂ ) and a bath heat exchanger (11) are inserted.The inlet side of the self-priming pump (P ₂ ) is connected to the circulation switching valve (15), and the self-priming pump (P The outlet side of ₂ ) is connected to the bath heat exchanger (11), and a switching valve (35) is inserted between the self-priming pump (P ₂ ) and the circulation switching valve (15). A water flow switch (17) is inserted on the outlet side of the self-priming pump (P ₂ ), and a pressure type water level sensor (18) is provided between the circulation switching valve (16) and the discharge port (12a). Is inserted. Therefore, the forced circulation circuit (1c) comprises a circulation switching valve (15) → a switching valve (35) → a self-priming pump (P ₂ ) → a water flow switch (17) → a bath heat exchanger (11) → a circulation switching valve ( 16).

The water level sensor (18) detects the pressure corresponding to the water level in the bathtub (B) which communicates via the discharge port (12a). The operation of the bubble bath apparatus having the above configuration will be described below. In this embodiment, each unit is controlled by a microcomputer, and the operation of each main unit will be described with reference to the flowchart shown in FIG.

[Regarding Hot Water Operation] Hot water operation is performed.
And a circulation pump (P₁) And self-priming pon
(P _Two) Is stopped and the filling valve (30) is opened
In both cases, the switching control valve (33) shuts off the branch circuit (45) and
When the road (44) is in communication with the filling circuit (3a), the switching valve
(35) is the circuit to both sides of the filling circuit (3a) and the forced circulation circuit (1c).
The circulation switching valve (15) is connected to the forward path (1a) while the
Cut off the junction (Q) side and discharge port (12b) and forced circulation circuit (1c)
And the circulation switching valve (16) is connected to the discharge port (12a).
Shut off the side and branch point (Q) between the forced circulation circuit (1c) and the forward path (1a)
Are set in a state where the sides are connected, and the switching valve (3
1) (32) is a state where the filtration circuit (2) and the return path (1b) side are connected.
Is set to As a result, as shown in FIG.₁)
Is filled with water from the discharge port (12b) side. At the time of this hot water,
The valve device (52) in the pressure feed hopper (5) is operated by hot water supply pressure.
To open the valve seat port (55) and close the air suction port (54).
Since the valve is in a valved state, hot water flows outside the pressure feed hopper (5).
It is not discharged and the hot water circuit (3a) is discharged from the valve chamber (51).
Downstream circuit (3a₁). In addition, at the time of this hot water filling, circulation
Circuit (1) and filtration circuit (2), and also forced circulation circuit (1c)
The whole is filled with hot water from the hot water circuit (3a)
Then, air purging of each circuit is performed.

At the initial stage of the filling, the flow counter (3
4), and as shown in FIG.
Liters) of hot water is supplied to the bathtub (B). Thereafter, the filling valve (30) is closed to stop the filling operation, and as shown in FIG. 4, the switching valve (35) closes the filling circuit (3a) side and the forced circulation circuit (1c ), The circulation switching valve (15) connects the forced circulation circuit (1c) side and the discharge port (12b) side, and
With the branch point (Q) side of (1a) closed and the circulation switching valve (1
6) are connected to the forced circulation circuit (1c) side and the discharge port (12a) side so that the branch point (Q) side of the outward path (1a) is closed, and each is set, and the self-priming pump (P ₂ ) Is in operation. As a result, hot water in the bathtub (B) is sucked from the discharge port (12b) and discharged from the discharge port (12a), thereby detecting the presence or absence of residual water. That is, the forced circulation circuit (1c)
When the state in which the water flow switch (17) is "ON" is continued for a predetermined time (30 seconds) in the circulating state, the discharge ports (61) and (62) in FIG. If it is determined that there is residual water up to the water level of 12b), and conversely, if the water flow switch (17) is “OFF”, it is determined that there is no residual water.

If it is determined that there is no remaining water,
The filling operation of a fixed amount (10 liters) is performed again in the same procedure as above, and the remaining water determination is performed. And
If it is determined that there is no remaining water in this determination,
The above operation is repeatedly performed until the water level in (B) reaches the height of the discharge port (12b) and the water flow switch (17) is turned on. In other words, a fixed amount of hot water is intermittently filled until there is remaining water.

When it is determined that there is residual water in the residual water determination, after the first to third air bleeding operations described in detail below are performed, the filling water level is detected by the water level sensor (18). Meanwhile, the continuous filling operation is executed in the state of FIG. 3, and when the filling water level in the bathtub (B) reaches the set water level, the filling operation is completed. [First to third air bleeding operation] When it is determined that there is residual water during the above-mentioned intermittent filling, the circulating pump (P ₁ ) is set to an operating state, and the _first circulating circuit including the circulating pump (P ₁ ) is operated. (1) The air bleeding operation is executed, and it is checked whether or not the air bleeding is completed.

For this reason, steps (63) to (6) in FIG.
The operations up to 5) are performed. First, a water filling operation of a fixed amount (10 liters) is executed to further raise the water level in the bathtub (B) by a fixed amount. Thereafter, as shown in FIG. 5, the circulation pump (P ₁ ) is turned on, the return path (1b) communicates with the filtration circuit (2), and the outward path (1a) communicates with the forced circulation circuit (1c) side. At the same time, each part is set so that the discharge port (12b) side is shut off and the discharge port (12a) side is in communication with the return path (1b) and the forced circulation circuit (1c), and the first air bleeding operation is performed. Is done.

Thus, a circulation path of the suction port (B ₁ ) → return path (1b) / circulation pump (P ₁ ) → filtration circuit (2) is formed, and the outward path (1a) is connected to the discharge port (12a). Circuit, and the outward path (1a) and the discharge port (12b) are shut off, and the suction port (B
₁ ) → Circulation pump (P ₁ ) → Outgoing path (1a) → Circulation switching valve (15) → Forced circulation circuit (1c) → Circulation switching valve (16) → Discharge port (12a) . At this time, the circulation switching valve (16) is in a state where the flow rate from the outward path (1a) to the discharge port (12a) is reduced, and the circuit from the forced circulation circuit (1c) to the discharge port (12a) is set to a fully open state. Have been.

Therefore, when the hot water in the bathtub (B) is smoothly circulating through the circulation circuit shown in FIG. ₁ by the operation of the circulation pump (P ₁ ), the circulation switching valve (1c) is connected to the forced circulation circuit (1c). A certain water flow from 15) to the circulation switching valve (16) is reliably generated. After the circulating pump (P ₁ ) is operated for a fixed time (10 seconds) and the first air bleeding operation is executed, steps (64) and (65) in FIG.
Is checked for air release for a certain period of time (20 seconds)
If the water flow switch (17) continues to be in the “ON” state, it is determined that the air bleeding of the circulation circuit has been completed, and then the above-described continuous filling operation is performed in the mode shown in FIG. 3, and the water level sensor (18) ), The continuous filling operation is stopped and filling is completed when the detected water level becomes higher than the water discharge ports (12a) (12b).

In the air release check, when the water flow switch (17) is turned off, a part of the circulation circuit (mainly the circulation pump (P ₁ )) has an air bite. Therefore, in this case, the circulating pump (P ₁ ) is stopped, the second air bleeding operation is performed, and then the third air bleeding operation of FIG. 7 using the self-priming pump (P ₂ ) is performed. You. The second air bleeding operation is, as shown in FIG. 6, a backwashing operation of the filtration vessel (20) of the filtration circuit (2) for a certain period of time, and the filtration inside the filtration vessel (20) where air tends to remain. By backwashing the member, air bleeding at this portion is ensured.

As shown in FIG. 6, the second air bleeding operation connects the backwashing circuit (3b) branched from the hot water filling circuit (3a) with the filtration circuit (2), and also connects the filtration circuit (2). ) And return
(1b) The switching valves (31) and (32) are set in a state where the side is shut off, and the filling valve (30) is opened to generate a backflow in the filtration circuit (2), and the discharge circuit (3c ) To drain water.

As shown in FIG. 8, this second air bleeding operation is performed when the air bleeding is determined to be defective in step (64) after the first time of the first air bleeding operation (water flow switch ( 17) is turned off). The third air bleeding operation is performed as shown in FIG.
(1b) and the filtration circuit (2), and the circulation switch valve (1
5) communicates only with the forward path (1a) and the forced circulation circuit (1c), and the switching valve (35) is set in a position that allows only the forced circulation circuit (1c) to communicate.The foot-side circulation switching valve (16) ) Is the forced circulation circuit (1
c) is set in a state where only the discharge port (12a) is communicated,
This is an operation for operating the self-priming pump (P ₂ ) with the circulation pump (P ₁ ) stopped.

In this embodiment, the self-priming pump (P ₂ ) is provided as shown in FIG.
A water storage chamber (25) and an impeller (26) for discharging the water stored in the water storage chamber (25) to an outlet (28) are provided. The self-priming pump (P ₂ ) is connected to the water storage chamber (2
The inlet (27) communicating with 5) and the outlet (28) are arranged with both of them facing upward. This self-priming pump (P
_{In 2} ), since the water storage chamber (25) is provided, the water storage chamber (25) is provided.
As long as water accumulates, even if some air stays in the upstream circuit, the impeller (26) does not lose its water supply function. That is, the outward path (1a) on the upstream side of the self-priming pump (P ₂ )
Even if some air stays in the return path (1b) or the like, the air is sucked into the self-priming pump (P ₂ ) together with the water in the circuit.
Therefore, bathing water suction port of the tub along with this (B) (B ₁₎ →
Return path (1b) and filtration circuit (2) → outward path (1a) → self-priming pump (P
₂ ) supplied.

As a result, the entire circulation path is forcibly circulated, and the inside of the non-self-priming circulation pump (P ₁ ) and the inside of the filtration vessel (20) where backflow occurs are evacuated. In the third air bleeding operation, the control operations from step (66) to step (68) in FIG. 8 are executed. In step (66), both the 15-second timer and the 5-minute timer are turned on. After that, the output state of the water flow switch (17) (corresponding to the water flow detection means described in the section of the technical means described above) is monitored by steps (67) and (68), and the output state of the water flow switch (17) is monitored for 15 seconds for 5 minutes. When the "on" state of the water flow switch (17) continues, it is determined that the third air bleeding has been completed, and the first air bleeding operation of step (63) and subsequent steps is executed again.

Next, a description will be given of the abnormality detection step which is the subject of the present invention. After the second air bleeding operation is performed following the first air bleeding operation, when the first air bleeding operation is performed again, the self-priming pump (P
₂ ) Third air bleeding operation (step (66)-)
(68)) and the first by the non-self-priming circulating pump (P ₁ )
The air bleeding operation (steps (63) to (65)) is alternately repeated, and the first air bleeding operation is repeated a set number of times (2
(0 times), it is determined to be abnormal and an error is displayed. According to the present embodiment, after performing the second air release after the first first air release, error processing is performed after repeating the first and third air release operations a predetermined number of times. In many cases, the air bite of (P ₁ ) is eliminated, thereby reducing the frequency of occurrence of errors.

When executing the third air release, a water flow switch
If (17) does not turn on continuously for 15 seconds, 1
After the 5 second timer is stopped and reset, this operation is continued for 5 minutes. During this time, if the water flow switch (17) is turned on, the 15 second timer is turned on again, and the steps (67) and (68) ) Is performed.
If the water flow switch (17) does not turn on for 5 minutes, it is determined that there is something wrong with the circulation circuit, the self-priming pump (P ₂ ) is turned off, and an error is displayed.

As described above, by selectively using the circulating pump (P ₁ ) and the self-priming pump (P ₂ ), air clogging and air deficiency of each part of the circulating path (mainly the circulating circuit (P ₁ )) can be prevented. As a result, highly accurate water level detection by the water level sensor (18) becomes possible, and the water is filled to a predetermined water level. The suction-type circulation pump (P ₁ ) can function reliably.

[Others] In the above description, the present invention is applied to recover the function of the non-self-priming circulating pump (P ₁ ) which has stopped functioning during hot water filling. The present invention may be applied to the case where the non-self-priming circulating pump (P ₁ ) is operated. That is, the air suction circuit
If air does not function even when the circulation pump (P ₁ ) is operated by opening the on-off valve (14) of (13) and the pump does not function, the first air release and the third air release are performed. The operation of the circulation pump (P ₁ ) may be restored by repeating the above operation. Further, when the non-self-priming circulation pump (P ₁ ) does not function, it is possible to appropriately perform the above-described air bleeding as needed, even at times other than the above-mentioned hot water filling or bubble operation. Needless to say.

It should be noted, was placed in the forced circulation circuit (1 _C) water flow switch (17) in the above embodiment, the water flow switch in any circuit as long as the circuit water stream is generated during operation of the circulating pump (P ₁₎
(17) may be provided. For example, a water flow switch (17) can be provided in the circulation circuit (1) or the like. In the above embodiment, the outlet side of the circulation pump (P ₁ ) is a self-priming pump (P
₂ ) The self-priming pump was connected so as to be connected to the inlet side.
The pump may be arranged in such a manner that the entrance of (P ₂ ) is reversed. That is, the outlet side of the self-priming pump (P ₂ ) may be connected to the outlet side of the circulation pump (P ₁ ).

[Brief description of the drawings]

FIG. 1 is an explanatory view of a conventional example.

FIG. 2 is an overall view of a configuration according to an embodiment of the present invention.

FIG. 3 is a state diagram of each part during a filling operation.

FIG. 4 is a state diagram of each part during a residual water detection operation.

FIG. 5 is a state diagram of each part during a first air release operation.

FIG. 6 is a state diagram of each part during a second air release operation.

FIG. 7 is a state diagram of each part during a third air release operation.

FIG. 8 is a flowchart of a control device according to this embodiment.

FIG. 9 is an explanatory view of a self-priming pump (P ₁ ).

[Explanation of symbols]

(B) ... bathtub (12) ... discharge port (B ₁₎ ... suction port (P ₁₎ ... circulation pump (1) ... circulation circuit (P ₂₎ ... Self-priming Type pump (1c) ・ ・ ・ Forced circulation circuit (15) (16) ・ Circulation switching valve (1c) ・ ・ ・ Forced circulation circuit

Claims (1)

(57) [Claims] 1. A discharge port (1) provided in a constituent wall of a bathtub (B).
2) a circulating circuit (1) connecting the suction port (B ₁ ) and having a non-self-priming circulating pump, and returning from the outlet side to the inlet side of the circulating pump in the circulating circuit (1). And a heat exchanger for bath formed so as to bypass a part of a circuit on the outlet side of the circulating pump in the circulating circuit (1) and a filtering circuit (2) provided with a filtering vessel (20) inserted therein. The filter (2) is provided with a forced circulation circuit (1c) provided with a vessel (11) and a self-priming circulation pump. A backwashing device for backwashing the vessel (20) and discharging the same to the outside of the circulation circuit is provided in series, and a water flow detection means for detecting a water flow generated when the non-self-priming circulation pump is operated is provided. At the same time, when the non-self-priming circulating pump is The output of the means is monitored, and if a water flow detection signal is not generated from the water flow detection means after activating the non-self-priming circulating pump, the filtration circuit (2) is activated after activating the backwashing device. The self-priming circulating pump inserted into the forced circulation circuit (1c) for reheating is operated by switching the flow path so that the flow is in the forward direction, and thereafter, the self-priming circulating pump and the self-priming circulating pump are connected. The bath apparatus is configured to alternately operate the circulating pump and repeat the operation a predetermined number of times, and to determine an abnormality if the water flow detection signal is not generated from the water flow detection means even after the predetermined number of times. Detection method.