JP2732012B2 - Control method of bath equipment - 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 of controlling a bath apparatus, and more particularly, to a method of controlling a bath apparatus of a type in which a filtration device (20) for removing dust contained in bath water is incorporated. is there.

[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) constituting the circulation circuit (1), while the downstream part of the outward path (1a) constituting the circulation circuit (1) is connected to the bathtub (1). B)
Outlets (12) (1) formed in the back and foot side walls of the
It is connected to 2). Further, 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 a non-self-priming type pump is used as the circulation pump (P ₀₁ ) is that if the self-priming type pump which requires a large capacity is used, the size of the apparatus becomes large.

Further, a forced circulation circuit (1c) formed so as to bypass a part of the circuit is connected to the circulation circuit (1), and the forced circulation circuit (1c) is connected to a bath circuit. A heat exchanger (11) is provided. In the forced circulation circuit (1c), a so-called self-priming small circulation pump (P ₀₂ ) of a type that can be operated without bleeding air from the inside of the circuit is inserted.

[0004] A filtration circuit (2) for removing dust mixed in the bath water in the bathtub (B) is connected in parallel to the non-self-priming circulating pump (P ₀₁ ). Third and fourth switching valves (32) and (31) are arranged in the circuit near the entrance and exit of the filtration device (20) constituting the circuit (2). A discharge circuit (3c) that opens to the atmosphere is connected to the third switching valve (32) on the inlet side.
The filling circuit (3a) drawn from the water heater (4) is connected to the fourth switching valve (31) on the other outlet side.

Further, an air suction circuit (13) for sucking outside air is connected to the discharge ports (12) (12) formed on the side wall of the bathtub (B) through an on-off valve (14). ing. When filling the bathtub (B) with hot water, first, the discharge port (1
Until 2) is submerged, hot water is supplied from the water heater (4) into the bathtub (B), and then the non-self-priming circulation pump (P ₀₁ ) is operated. As a result, air which may have accumulated in the portion where the water level sensor (18) (usually constituted by a water pressure gauge) provided in the circuit near the discharge port (12) is placed in the bathtub (B). Extruding, thereby enabling the sensor to detect the water level in the bathtub. Then, after the air is removed, the hot water is supplied from the water heater (4) to the bathtub (B) while the water level is monitored by the water level sensor (18), and the hot water filling operation proceeds.

After completion of the filling, the circulating pump (P ₀₁ ) of the non-self-priming type is operated, and the on-off valve (1) for the intake is operated.
When the valve 4 is opened, the bath water circulates in the circulation circuit (1) and the air suction circuit (1) is ejected from the discharge ports (12) and (12) by the ejector effect ejected into the bathtub (B).
Outside air is sucked from 3) and is blown out into the bathtub (B). Thereby, the inside of the bathtub (B) becomes a bubble bath state. Also, in the above-mentioned bubble operation, the filtration device (2
0), the third and fourth switching valves (3
2) (31) uses the circulating pump (P
₀₁ ) side. Therefore, when the circulating pump (P ₀₁ ) is operated, a part of the discharge water of the circulating pump (P ₀₁ ) is supplied to the third switching valve (32).
To the filter device (20) and the fourth
The fluid is again sucked into the circulation pump (P ₀₁ ) via the switching valve (31). That is, a part of the circulating water in the circulation circuit (1) flows toward the filtration device (20) and is filtered, whereby the bathing water in the bathtub (B) is gradually purified.

On the other hand, while maintaining the non-self-priming circulation pump (P ₀₁ ) in a stopped state and heating the bath heat exchanger (11) with a burner, the other self-priming circulation pump (P ₀₁ ) is used.
₀₂₎ Activating the bathtub bottom suction ports _{(B 1)} → condensate
Road (1b) → non-self-priming circulating pump _{(P 01)} → own circulation pump _{(P 02)} of the priming → bath heat exchanger (11) → discharge opening (12) → bath (B) to lead circuit The bath water is forcibly circulated and heated, and the bathtub (B) is additionally fired.

[0008] However, in the above-described apparatus, there is a problem that when air is accumulated in the filtration device (20), the bubble operation or the filling operation may not be properly performed. For example, when the circulation pump (P ₀₁ ) is operated in order to release air from the water level sensor (18) at the beginning of filling, when air remains in the filtration device (20), the air is switched to the switching valve (P ₀₁ ). 31) from being sucked into the circulation pump _{(P 01)} so that the bite to the circulating pump _{(P 01).} That is, the non-self-priming circulation pump (P ₀₁ ) does not operate. Therefore, in such a case, the circulation circuit (1)
As a result, the water level sensor (18) cannot detect the accurate water level in the bathtub (B). or,
When bath (B) in the water level from entering air is very low now with the discharge port (12) and suction ports from (B ₁₎ or the like in each water circuit, which may accumulate in the air filtration device (20).
When the air bubble operation is performed under such conditions, the air that has entered the filtration device (20) bites into the circulation pump (P ₀₁ ) in the same manner as described above, so that the air does not operate. .

The present invention has been made in view of the above points, and makes it possible to bleed air remaining in a filtration device (20), thereby enabling proper operation of a non-self-priming circulating pump. The task is to ensure that

[0010]

Technical Means The technical means of the present invention for solving the above-mentioned problem is described in "Suction port (B ₁ ) provided in the constituent wall of bathtub (B)".
From the inlet of the non-self-priming circulating pump (P ₁ ), passing through the outlet thereof, and being provided on the component wall of the bathtub (B) downstream of the circulating pump (P ₁ ). A circulation circuit (1) including first and second branch circuits (150) and (160) that branch so as to be respectively connected to the two discharge ports (12b) and (12a); and the first and second branch circuits (150). ) (1
60) first and second switching valves (15) provided separately.
(16) and connected to a bath heat exchanger (1).
1) and a forced circulation circuit (1c) including a water flow detecting means
Self-priming provided in the forced circulation circuit (1c) and having an inlet connected to the first switching valve (15) and an outlet connected to the second switching valve (16). A filtration circuit (2) having a filtration device (20) having an outlet and an inlet respectively connected to an inlet and an outlet of the non-self-priming circulation pump (P ₁ ); A discharge circuit (3c) connected to a third switching valve (32) provided on the inlet side of the filtration device (20) in (2) and opened to the atmosphere, and the discharge circuit (3) in the filtration circuit (2). A fourth switching valve (3) provided on the outlet side of the filtration device (20).
1) A control method for a bath apparatus having a water supply circuit connected to 1), wherein an inlet and an outlet of the filtration device (20) are connected to an outlet and an inlet of the non-self-priming circulation pump (P ₁ ). It said third, fourth switching valve (32) the switches the (31) the suction port _{(B 1)} from through the circulating pump _{(P 1)} of the circulation circuit (1), the first branch circuit (150)
The first switching valve (15), the forced circulation circuit (1c), and the second switching valve (16) of the second branch circuit (160) are connected to the second discharge port (12a). 1,
The non-self-priming circulating pump is operated in the first circuit state in which the second switching valves (15) and (16) are switched, and when the non-self-priming circulating pump is operated, the water flow detecting means detects the water flow. When the detection signal is not output, the water supply circuit, the fourth switching valve (31), the filtering device (20), the third switching valve (32), and the water passage circuit connected to the discharge circuit (3c) are formed. After switching the third and fourth switching valves (32) and (31),
Water is temporarily supplied from the water supply circuit, and subsequently, the third and fourth switching valves (32) and (31) are switched to return to the first circuit state. Thereafter, the self-priming circulating pump is operated. ] That is.

[0011]

The operation of the above technical means will be described with reference to the accompanying drawings. The third and fourth switching valves (32) and (31) are switched so that the inlet and the outlet of the filtration device (20) are connected only to the outlet and the inlet of the non-self-priming circulation pump (P ₁ ). From the suction port (B ₁ ) to the circulation circuit (1)
Through the circulation pump (P ₁ ) of the first branch circuit (15).
0) The first switching valve (15) → the forced circulation circuit (1c) → the second switching valve (16) of the second branch circuit (160) → the circuit connected to the second discharge port (12a) is formed. The non-self-priming circulating pump in a first circuit state in which the first and second switching valves (15) and (16) are switched (corresponding to the state of FIG. 5 in the embodiment described later, but may be the state of FIG. 7). If the water flow detection means does not output a water flow detection signal when activating (P ₁ ), air may have accumulated in the filtration device (20) of the filtration circuit (2). Therefore, in such a case, FIG.
As shown in the figure, the third and fourth water supply circuits → the fourth switching valve (31) → the filtration device (20) → the third switching valve (32) → the third and the third water supply circuits are connected so as to communicate with the water discharge circuit (3c). After switching the four switching valves (32) and (31), water is temporarily supplied from the water supply circuit. Then, the supply water passes through the filtration device (20) of the filtration circuit (2), and is discharged to the outside from the discharge circuit (3c) together with the air remaining in the filtration device (20). Thereby, the air staying in the filtration device (20) is removed.

Next, the third and fourth switching valves (32) and (31) are switched so that the inlet and outlet of the filtration device (20) are connected to the outlet and inlet of the non-self-priming circulating pump. After returning to the first circuit state, the self-priming circulation pump disposed in the forced circulation circuit (1c) for additional heating is operated. Then, the water in the water circuit on the upstream side of the circulation pump is sucked. That is, the bath water in the bathtub (B) is
Suction port (B ₁ ) → non-self-priming circulation pump (P ₁ ) in circulation circuit (1) → first switching valve (15) of first branch circuit (150) → self-circulation pump (1c) Suction type circulation pump → second switching valve (16) of second branch circuit (160) → second
The second discharge port (12a) at the downstream end of the branch circuit (160) →
The bath water circulates in a circuit connected to the bathtub (B) and is supplied to the non-self-priming circulation pump.

Thus, the circuit connecting the inlet side of the non-self-priming circulating pump (P ₁ ) to the bathtub (B) on the upstream side and the two circuits of the filtration circuit (2) are evacuated. Become.

[0014]

The above technical means have the following effects. The non-self-priming circulation pump is operated by removing air remaining in the filtration device (20) by supplying water from the water supply circuit, and then returning to the first circuit state to operate the self-priming circulation pump. Therefore, when the non-self-priming circulating pump is operated thereafter, air does not flow into the circulating pump from the filtration device (20), and the circulating pump may malfunction. Absent.

[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. The bathtub (B) has a second discharge port (12) on the foot side corresponding to the discharge port (12) (12) described above.
a) and a first discharge port (12b) on the back side, and the first and second discharge ports (12b) (12a) are provided with a branch circuit (150) of the outward path (1a) of the circulation circuit (1). (160)
Are connected separately. That is, the outlet of the bath (B) of the suction port (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 circulation pump (P ₁₎ The outgoing path (1a) connected to the side is branched at the branch point (Q) into first and second branch circuits (150) and (160), one of which is the second discharge port (12) on the foot side.
In (a), the other is connected to the first discharge port (12b) on the back side to form a circulation circuit (1). And
A branch circuit downstream of the air suction circuit (13) is separately connected to the first and second discharge ports (12b) (12a),
The circuit 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 (2) provided in parallel with the circulation circuit (1) has a configuration in which a filtration device (20) is inserted as in the conventional example, and an outlet and an entrance of the filtration device (20) are provided with a circulation pump (P _1). ) Are connected to the inlet and outlet sides of
The filtration direction 0) matches the forward direction of the circulation circuit by the circulation pump (P ₁ ). In the filtration circuit (2), a fourth switching valve (31) is provided on the outlet side of the filtering device (20), and a third switching valve (32) is provided on the inlet side of the filtering device (20). The fourth switching valve (31) has a backwash circuit (3
b) is connected, and a discharge circuit (3c) that opens to the atmosphere is connected to the third switching valve (32).

The bubble bath apparatus includes a water heater (4) and a bath heat exchanger (11). The water heater (4) is a so-called bypass mixing system in which a bypass circuit (43) from a water supply pipe (41) on the inlet side to the heat exchanger is joined to a circuit to be heated (42) via the heat exchanger. There is. Therefore, by controlling the distribution amount by the water supply pipe (41) and the control valve (46) inserted at the branch point of 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 tapping circuit (44)
The water supply pipe (41) is also connected to the hot water circuit (3a) branched from
A branch control circuit (45) is merged with the switch control valve (33) at this junction. The opening degree of the switching control valve (33) is controlled by a servo motor (M). In this embodiment, the filling circuit (3a)
And the hot water circuit (3a),
The tapping circuit (44) side or the branch circuit (45) side can be selectively communicated. Accordingly, only the hot water circuit (3a) and the branch circuit (45) can communicate with each other to supply tap water to the bathtub (B) as it is. In this case, the heated circuit (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) has a filling valve (3
0), a flow counter (34) for measuring the filling flow rate, and a pressure feeding hopper (5) are inserted in this order, and the downstream end thereof is a self-priming pump of a forced circulation circuit (1c) for circulating heating described later. It is connected to the upstream side of (P ₂ ). The filling circuit (3a) and the forced circulation circuit (1)
A fifth switching valve (35) is provided at the junction with c). The fifth switching valve (35) is in a state where the filling circuit (3a) is shut off and only the forced circulation circuit (1c) is in communication with the fifth switching valve (35). The configuration is such that it can be switched to a state in which it is connected to both the suction pump (P ₂ ) side and the circulation switching valve (15) side.

The pressure feeding hopper (5) includes a casing (5).
0) a valve device (52) housed in a valve chamber (51);
An air chamber (5) connected to the valve chamber and opened to the atmosphere side
3). 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). ) Is opened, and a valve device (52) including a valve body opposed to the air suction port (54) and the valve seat port (55) is built in between them. The valve device (52) is urged by a spring (not shown) so as to always close the valve seat port (55) and open the air suction port (54). ), The valve seat opening (55) is opened and the air suction opening (54) is opened.
Is a form that acts to close

A downstream circuit (3a,) of the filling circuit (3a) is connected to the side wall of the valve chamber (51), and the downstream circuit (3a ₁ ) and the air chamber (53) are connected to a drain valve. (5
The communication pipes (57) into which 6) are inserted are connected for communication. The forced circulation circuit (1c) includes a first switching valve (15) inserted into the first branch circuit (150) of the circulation circuit mountain, and a second switching valve (15).
A self-priming pump (P ₂ ) as a self-priming circulation pump between the second switching valve (16) inserted into the branch circuit (160);
And a heat exchanger for bath (11) inserted therein, and the inlet side of the self-priming pump (P ₂ ) is connected to the first switching valve (15).
And the outlet side of the self-priming pump (P ₂ ) is connected to the bath heat exchanger (11), and between the self-priming pump (P ₂ ) and the first switching valve (15). A fifth switching valve (35) is inserted in the second valve. Self-priming pump (P ₂ )
A water flow switch (17), which is a water flow detection means, is inserted at the outlet side. Therefore, the forced circulation circuit (1c)
Switching valve (15) → Fifth switching valve (35) → Self-priming pump (P ₂ ) → Water flow switch (17) → Bath heat exchanger (1)
1) → A path of the second switching valve (16). In addition, the second
A pressure type water level sensor (18) is inserted between the switching valve (16) and the second discharge port (12a).

The water level sensor (18) detects the pressure corresponding to the water level in the bathtub (B) communicating through the second 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 the Filling Operation] When the filling operation is performed, as shown in FIG. 3, the filling valve (30) is operated with the circulation pump (P ₁ ) and the self-priming pump (P ₂ ) stopped. The valve is opened and the switching control valve (3
The fifth switching valve (35) switches the filling circuit (3a) so that 3) disconnects the branch circuit (45) and connects the tapping circuit (44) to the filling circuit (3a). The first switching valve (15) is connected to the branch point (1) of the first branch circuit (150) such that the first switching valve (15) is in communication with both the inlet side of the self-priming pump (P ₂ ) and the first switching valve (15). The second switching valve (16) is connected to the second discharge port (12) so that the first discharge port (12b) and the forced circulation circuit (1c) are in communication with each other by shutting off the Q) side.
The third and fourth switching valves are set so that the a) side is cut off and the forced circulation circuit (1c) and the branch point (Q) side of the second branch circuit (160) communicate with each other. 32)
(31) is set so that the filtration circuit (2) and the return path (1b) communicate with each other. Thereby, as shown in the figure, the hot water is filled from the suction port (B ₁ ) and the first discharge port (12b). At the time of this filling, the valve device (5) in the pressure feeding hopper (5) is
2) is operated by the hot water supply pressure to open the valve seat port (55) and close the air suction port (54), so that the hot water is discharged to the outside of the pressure feeding hopper (5). It flows from the valve chamber (51) to the downstream circuit (3a ₁ ) of the filling circuit (3a). During the filling, the circulation circuit (1), the filtration circuit (2) and the entire forced circulation circuit (1c) are filled with the hot water from the filling circuit (3a).

At the initial stage of filling, the water is measured by a flow counter (34) and a fixed amount (5 liters) of hot water is supplied to the bathtub (B) as shown in FIG. Thereafter, the filling valve (30) is closed to stop the filling operation, and as shown in FIG. 4, the fifth switching valve (35) closes the filling circuit (3a) side and the forced circulation circuit is closed. The first switching valve (15) communicates between the forced circulation circuit (1c) side and the first discharge port (12b) side so that the first communication valve (1c) communicates with the first discharge port (12b). The second switching valve (16) is connected to the forced circulation circuit (1c) side and the second discharge port (12) so that the branch point (Q) side of the branch circuit (150) is shut off.
a) side and the self-priming pump (P ₂ ) is set so that the branch point (Q) side of the second branch circuit (160) in the forward path (1a) is cut off. Is in operation. Thereby, the hot water in the bathtub (B) is sucked from the first discharge port (12b) and discharged from the second discharge port (12a), whereby the presence or absence of residual water is detected. That is, if the state in which the water flow switch (17) is "ON" is continued for a predetermined time (30 seconds) in the circulating state of the forced circulation circuit (1c), the bathtub (61) and (62) in FIG. In B), it is determined that there is residual water up to the water level of the first discharge port (12b). Conversely, when 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
When it is determined that there is no residual water in this determination, the above operation is performed until the water level in the bathtub (B) reaches the height of the first discharge port (12b) and the water flow switch (17) is turned on. Is repeatedly executed. 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). While the continuous filling operation is performed in the state of FIG. 3, the filling operation is completed when the filling water level in the bathtub (B) reaches the set water level. [First to Third Air Bleeding Operation] When it is determined that there is residual water during the above-described intermittent filling, the circulation pump (P ₁ ) is set to the operating state and the circulation pump (P ₁ ) is set.
Is performed, and it is checked whether or not the air bleeding is completed.

Therefore, the operations of steps (63) to (65) in FIG. 8 are executed. First, a certain amount (1
(0 liters), and the water level in the bathtub (B) is further increased by a certain amount. Thereafter, as shown in FIG. 5, the circulation pump (P ₁ ) is turned “ON” and the return path (1
b) and the filtration circuit (2) communicate with each other, the outward path (1a) communicates with the forced circulation circuit (1c) side, and the first discharge port (1).
The respective parts are set so that the 2b) side is shut off and the second discharge port (12a) side is in communication with the outlet of the circulation pump (P ₁ ) and the forced circulation circuit (1c), and the first air bleeding operation is performed. Is done.

As a result, the suction port (B ₁ ) is moved backward (1
together leads to the inlet of the circulation pump _{(P 1)} of b), the outlet → circulation of the circulating pump (inlet → the filtering device outlet → in filtration device the filtration circuit (2) (20) of _{P 1)} (20) A circuit circulating with the inlet of the pump (P ₁ ) is formed. or,
The circuit from the branch point (Q) of the second branch circuit (160) in the forward path (1a) to the second discharge port (12a) communicates with the first branch circuit (150) in the forward path (1a). ), The circuit from the branch point (Q) to the first discharge port (12b) is cut off, and the suction port (B ₁ ) → circulation pump (P ₁ ) → first
The first switching valve (15) of the branch circuit (150) → the forced circulation circuit (1c) → the second switching valve (1) of the second branch circuit (160)
6) A circulation circuit of the circuit of the second discharge port (12a) is formed. At this time, the second switching valve (16) is in a state where the flow rate from the outward path (1a) to the second discharge port (12a) is reduced, and the circuit from the forced circulation circuit (1c) to the second discharge port (12a). Is set to the fully open state.

Therefore, when the hot water in the bathtub (B) is smoothly circulating through the circulation circuit shown in the figure by the operation of the circulation pump (P ₁ ), the first switching valve is provided in the forced circulation circuit (1c). A constant water flow from (15) toward the second switching valve (16) is reliably generated. After the circulating pump (P ₁ ) is operated for a certain period of time (10 seconds) and the first air bleeding operation is performed, the air bleeding is checked in steps (64) and (65) of FIG. Switch (1
7) continues to be in the “ON” state, it is determined that the air bleeding of the circulation circuit is completed, and then the above-described continuous filling operation is performed in the mode shown in FIG.
When the water level detected by 8) is higher than the water discharge ports (12a) and (12b), the continuous filling operation is stopped, and filling is completed.

In the air release check, if the water flow switch (17) is turned off, there is an air bite in a part of the circulation circuit. Therefore, in this case, the circulation pump (P ₁ ) is stopped, and the second pump as shown in FIG.
The air bleeding operation is performed, and then the self-priming pump (P
The third air bleeding operation of FIG. 7 using ₂ ) is performed.
In addition, the said 2nd air bleeding operation | movement is operation | movement which performs backwashing of the filtration apparatus (20) of the filtration circuit (2) for a fixed time,
By backwashing the filtration member in the filtration device (20) where air tends to remain, it is possible to ensure that air is removed from this portion.

As shown in FIG. 6, the second air bleeding operation is performed by the backwashing circuit (3) branched from the hot water filling circuit (3a).
b) and the filtration circuit (2), and the third and fourth switching valves (32) and (31) such that the filtration circuit (2) is cut off from the forward path (1a) and the return path (1b). Is set, and the hot water filling valve (30) is opened to cause a reverse flow in the filtration circuit (2) to drain the water from the discharge circuit (3c). That is, the hot water circuit (3a) → the backwashing circuit (3b) → the fourth switching valve (31) → the filtration device (2)
0) → the third switching valve (32) → the third and fourth switching valves (32) so that the circuit connected to the discharge circuit (3c) communicates with the third switching valve (32).
After switching (31), water is supplied from the hot water circuit (3a). In this embodiment, in FIG.
a) → backwashing circuit (3b) → circuit connected to fourth switching valve (31) corresponds to the water supply circuit described in the section of the technical means described above.

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 off) only. The other third air release operation is an operation of operating the self-priming pump (P ₁ ) in a state where the circuit as shown in FIG. 7 is established. That is, the return path (32) is switched by switching the third and fourth switching valves (32) and (31) such that the inlet and outlet of the filtration device (20) are connected to the outlet and inlet of the non-self-priming circulation pump (P ₁ ). 1b) is communicated with the filtration circuit (2). In addition, the first switching valve (15) on the back side is
a) and only the forced circulation circuit (1c) communicate with the fifth switching valve (35) and only the forced circulation circuit (1c), and the second switching valve (16) on the foot side communicates with the forced circulation circuit (1c). )
And only the second discharge port (12a). Thereby, the self-priming pump (P ₁ ) of the circulation circuit (1) → the first switching valve (15) of the first branch circuit (150) → the forced circulation circuit (1c) → the second suction circuit from the suction port (B ₁ ). 2-branch circuit (16
0) The second switching valve (16) is connected to the second discharge port (12a). In this state, the self-priming pump (P ₂ ) is operated with the circulation pump (P ₁ ) stopped. As a result, water flows to the circulation pump (P ₁ ), the forced circulation circuit (1c), and the like, and the inside of the non-self-priming circulation pump (P ₁ ) is vented.

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 used. The output state of the water flow switch (17) is monitored in steps (67) and (68), and if the "on" state of the water flow switch (17) continues for 15 seconds during 5 minutes, 3 It is determined that the air bleeding has been completed, and the first step following step (63) is performed.
The air release operation is executed again.

When the first air bleeding operation is repeated a set number of times (20 times), it is determined that there is an abnormality, and an error is displayed. If the water flow switch (17) is not continuously turned “ON” for 15 seconds during the execution of the third air release, the operation is continued for 5 minutes after the 15-second timer is stopped and reset. When the switch (17) is turned “ON”, the 15-second timer is turned “ON” again, and the checks in steps (67) and (68) are executed.

If the water flow switch (17) is not turned on for 15 seconds continuously for 5 minutes,
After the self-priming pump (P ₂ ) is turned off when it is determined that there is an abnormality in the circulation circuit, an error is displayed. As described above, the circulation pump (P ₁ ) and the self-priming pump (P ₂ )
By using differently, air biting and air bleeding failure of each part of the circulation circuit are eliminated, and as a result, the water level sensor (1
8), the water level can be detected with high accuracy, and the water is filled to a predetermined water level. In addition, in the reheating operation after the completion of the filling and the bubble operation operation, the non-self-priming circulation pump (P
₁ ) can function reliably. [Others] In the above embodiment described the case of executing the air vent operation of the filtration device (20) to the hot water filling initial, air circulation pump filtration device (20) during the bubble operation (P ₁ ), The filter (20)
Air bleeding may be performed. That is, the on-off valve (14) of the air suction circuit (13) is opened to open the circulation pump (P ₁ ).
When the pump is operated, a filter (20) is connected to the pump (P ₁ ).
If the air inside bites and does not perform its function, the first air release to the third air release operation, or
Only the second air release operation may be executed. If the non-self-priming circulating pump (P ₁ ) does not perform its function, the filter container (2) may be evacuated as necessary, even when the operation is not at the time of the filling or the bubble operation. Needless to say, it is good.

[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.

[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 suction port (B) provided in a constituent wall of a bathtub (B).
₁ ) and a non-self-priming circulating pump (P ₁ )
First provided on the downstream side structure wall of the bath (B) of the inlet than through the outlet the circulating pump (P _1), so as to be connected to each other in the second discharge port (12b) (12a) A circulating circuit (1) including first and second branch circuits (150) and (160) for branching, and first and second circuits respectively provided in the first and second branch circuits (150) and (160). A forced circulation circuit (1c) formed so as to connect the switching valves (15) and (16) and including a bath heat exchanger (11) and a water flow detecting means; and provided in the forced circulation circuit (1c); The inlet is on the first switching valve (15) side, and the outlet is the second switching valve (1).
6) a self-priming circulating pump inserted so as to be connected to each side, and a filtration device (20) in which an outlet and an inlet are respectively connected to an inlet and an outlet of the non-self-priming circulating pump (P ₁ ). And a discharge circuit connected to a third switching valve (32) provided on the inlet side of the filtration device (20) in the filtration circuit (2) and opening to the atmosphere. 3c) a method of controlling a bath apparatus including a water supply circuit connected to a fourth switching valve (31) provided on an outlet side of the filtration device (20) in the filtration circuit (2). The third and fourth switching valves (32) and (31) are switched so that the inlet and outlet of the filtration device (20) are connected to the outlet and inlet of the non-self-priming circulation pump (P ₁ ). From the suction port (B ₁ ), the circulation pump (P
₁ ), the first switching valve (15) of the first branch circuit (150), the forced circulation circuit (1c), and the second branch circuit (16).
0) in the first circuit state in which the first and second switching valves (15) and (16) are switched so as to form a circuit connected to the second discharge port (12a) from the second switching valve (16). When the non-self-priming circulating pump is operated, and when the non-self-priming circulating pump is operated, the water flow detecting means does not output a water flow detection signal, a water supply circuit,
The third and fourth switching valves (32) (32) (so that a water passage circuit connected to the fourth switching valve (31), the filtration device (20), the third switching valve (32), and the discharge circuit (3c) is formed. 31), water is temporarily supplied from the water supply circuit, and subsequently the third circuit state is returned to the first circuit state by switching the third and fourth switching valves (32) and (31). A method of controlling a bath apparatus that operates a circulating pump.