JP2023121905A - bath system - Google Patents

Abstract

To provide a bath system which can control an automatic drain plug of a bathtub by properly performing data communication even when communication protocols of a power supply control device and a water heater related to the automatic drain plug are different from each other.SOLUTION: A bath system SY includes: a power supply control device 3 which is capable of performing drive power supply to an automatic drain plug 41 of a bathtub 40 and control of operation of the drain plug; and a water heater WH which can supply hot water to the bathtub 40. The bath system SY further includes an interface unit 2 which is communicatively connected to the water heater WH and the power supply control device 3, and upon receiving a signal on prescribed drain water plug-related information from the water heater WH, outputs a control signal for making the power supply control device 3 perform an opening/closing operation of the automatic drain plug 41 in response to a content of the signal. The interface unit 2 is configured to receive power supply from the water heater WH or a power supply source different from the water heater WH, and not to receive power supply from the power supply control device 3.SELECTED DRAWING: Figure 2

Description

The present invention relates to a bath system of the type in which the bath is provided with an automatic drain plug.

A specific example of the bath system is disclosed in Patent Document 1.
The bath system described in the document includes a hot water supply device capable of supplying hot water to a bathtub, and a power supply control device (drain plug control device) for executing drive power supply and operation control of an automatic drain plug provided in the bathtub. I have. The water heater and the power supply control device are connected to communicate with each other, and when the water heater starts to supply hot water to the bathtub, the power supply control device senses this and closes the automatic drain plug. is set to
According to this configuration, when starting to supply hot water to the bathtub, the automatic drain plug can be set to the closed state by the control of the power supply control device. It is possible to prevent the hot water supply from starting.

However, the prior art still has room for improvement as described below.

That is, the hot water supply apparatus and the power supply control apparatus are connected for communication with each other, and this communication is performed according to a predetermined communication protocol. Therefore, if the communication protocol between the hot water supply device and the power supply control device does not match, it is difficult to appropriately construct the bath system.
More specifically, when remodeling a bathroom, there is a case where an existing water heater is used while a new automatic drain plug and power supply control device are purchased and installed. In this case, if the automatic drain plug and the power supply control device are manufactured by a different manufacturer than the hot water supply device and their communication protocols are different, appropriate data communication between them will not be possible. This causes a problem that it becomes difficult to control the automatic drain plug.
Unlike the above, in a bath system that already has an automatic drain valve and a power supply controller in addition to the water heater, for example, only the water heater may be replaced. In this case, if the water heater is made by a different manufacturer, for example, the communication protocol will be different, making it difficult to control the automatic drain plug.
As described above, in the prior art, the automatic drain valve, the power supply control device, and the hot water supply device must be made by the same manufacturer and have the same communication protocol. In order to improve flexibility of the system and convenience for users, it is desirable to solve such problems appropriately.

Another specific example of the bath system is described in Patent Document 2. In the bath system described in the document, a remote controller for a water heater and a power supply control device for controlling an automatic drain plug and a bathtub cleaning device are connected for communication using an HA terminal. However, even with such a configuration, if the hot water supply device and the power supply control device are manufactured by different manufacturers and have different communication protocols, the same procedure as described in Patent Document 1 is performed. However, it is not possible to solve the above-mentioned problems appropriately.

Japanese Patent Application Laid-Open No. 2021-169906 Japanese Patent Application Laid-Open No. 2021-116930

The present invention has been conceived under the circumstances as described above, and a power supply control device capable of executing the driving power supply and operation control of the automatic drain valve of the bathtub and the hot water supply device are manufactured by different manufacturers. Even if their communication protocols are different due to the fact that they are The task is to provide a possible bath system.

In order to solve the above problems, the present invention takes the following technical means.

A bath system provided by the present invention includes a power supply control device capable of supplying power to drive an automatic drain plug of a bathtub and controlling the operation of the automatic drain plug, and supplying hot water to the bathtub. and a water heater capable of outputting a signal of drain plug-related information, wherein communication is connected to each of the water heater and the power supply control device, and from the water heater to the drain plug. an interface unit that, when receiving a signal of related information, outputs a control signal for causing the power supply control device to perform an opening/closing operation of the automatic drain plug in accordance with the content of the signal; The interface unit is configured to receive power from the water heater or a power supply source separate from the water heater, and is configured to be operable without receiving power from the power supply control device. is characterized by

In the present invention, preferably, mutual communication between the hot water supply apparatus and the interface unit is performed according to a first communication protocol, while mutual communication between the interface unit and the power supply control apparatus is performed by: When communication is performed by a second communication protocol different from the first communication protocol, and the interface unit receives a signal of the drain plug-related information from the water heater by the first communication protocol, A corresponding signal is transmitted to the power supply control device in the second communication protocol.

According to the above configuration of the present invention, the following effects are obtained.
That is, the water heater and the power supply control device are not directly connected for communication, but are indirectly connected for communication via the interface unit. When the signal is output, a control signal corresponding to the content is output from the interface unit to the power supply control device. Therefore, even if the communication protocols of the water heater and the power supply control device are different, it is possible to appropriately control the operation of the automatic drain plug using the interface unit and the power supply control device based on the output signal from the water heater. becomes possible. As a result, it is possible to construct a bath system by combining, for example, a hot water supply device and a power supply control device which are products of different manufacturers, which is highly flexible and convenient.
In addition, since the interface unit does not receive power from the power supply control device and has a power supply system independent of the power supply control device, if a failure occurs in them, the failure will be transmitted to the interface unit side. It becomes clear whether it is a failure or a failure on the side of the power supply control device. Therefore, the warranty category for such failures is also clarified, and it is possible to preferably prevent troubles regarding failure repair or quality assurance by the manufacturer or distributor.

In the present invention, preferably, the interface unit is wire-connected to the water heater and is configured to receive power supply from the water heater.

According to such a configuration, the power supply to the interface unit can be easily achieved, and the configuration can be simplified as compared with the case where the power is independently supplied from the commercial power supply.

In the present invention, preferably, when the power supply control device receives the control signal from the interface unit and operates the automatic drain plug in accordance with the content of the control signal, a response signal for notifying that fact is sent back to the water heater via the interface unit.

According to such a configuration, it is possible to allow the hot water supply apparatus to accurately detect the operation state of the automatic drain plug, and it is more preferable in terms of executing an appropriate operation of the automatic drain plug corresponding to the hot water supply operation of the hot water supply apparatus. become a thing.

In the present invention, preferably, the power supply control device is wire-connected to the interface unit as a communication circuit for mutual data communication with the interface unit, and is supplied with power from the interface unit. a first communication circuit; and a second communication circuit capable of signal transmission with the first communication circuit via a photocoupler and receiving power from a power supply circuit provided in the power supply control device. , wherein the first and second communication circuits are electrically isolated from each other.

According to such a configuration, the first and second communication circuits provided in the power supply control device are electrically insulated from each other while allowing signal transmission via the photocoupler. Therefore, even if an electrical failure (abnormal situation) occurs in either the interface unit side including the first communication circuit or the power supply control device side including the second communication circuit, the failure can be prevented from affecting the other, and a large failure of the whole can be appropriately prevented.

In the present invention, it is preferable that the bathtub cleaning device further comprises a bathtub cleaning device that operates by receiving power supply from the power supply control device and is capable of cleaning the bathtub using hot water supplied from the hot water supply device, The hot water supply device is capable of outputting a signal of bathtub cleaning related information related to the operation of the bathtub cleaning device, and the interface unit receives a signal of the bathtub cleaning related information from the water heating device, Corresponding to the content, it is configured to output a control signal for operating the bathtub cleaning device to the power supply control device.

According to such a configuration, it is possible to control the operation of not only the automatic drain plug but also the bathtub cleaning device in accordance with the contents of the bathtub cleaning related information output from the hot water supply device. Even if the bathtub cleaning device is manufactured by a different manufacturer than the hot water supply device, the operation can be appropriately controlled. Further, since power is supplied to the bathtub cleaning device from the power supply control device, even if the hot water supply device fails, the bathtub cleaning device can be operated.

Other features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows an example of schematic structure of the bath system which concerns on this invention. 2 is a block diagram of the bath system shown in FIG. 1; FIG. FIG. 3 is an explanatory diagram showing an example of operation control executed in the bath system shown in FIGS. 1 and 2; FIG. FIG. 3 is an explanatory diagram showing another example of operation control executed in the bath system shown in FIGS. 1 and 2; FIG. 3(a) and 3(b) are explanatory diagrams showing another example of operation control executed in the bath system shown in FIGS. 1 and 2. FIG. FIG. 6 is an explanatory diagram showing an example different from the operation control of FIG. 5;

Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

The bath system SY shown in FIG. The bathtub cleaning device A is configured by combining a cleaning nozzle 42 provided in the bathtub 40, a functional unit 5 described later, and a detergent tank 50. As shown in FIG.

The water heater WH is configured by combining a water heater body 1 with kitchen and bathroom remote controllers 6A and 6B.
As shown in FIG. 2, the hot water supply apparatus main body 1 includes a heat exchanger 10 into which hot water supplied from the outside is fed into a water inlet 12, and a burner 11 for heating the hot water flowing through the heat exchanger 10. there is Hot water heated by burner 11 can be supplied into bathtub 40 from outlet 13a through hot water pipe 13 and adapter 13b (shown in FIG. 1). The heated hot water can also be supplied to the functional unit 5 from another hot water outlet 14a through the hot water pipe 14, whereby the washing nozzle 42 shown in FIG. The detergent liquid can be jetted toward a wall surface or the like.
The functional unit 5 has a configuration in which a detergent liquid generating unit (not shown), an opening/closing valve, and the like are incorporated in a case 51 made of resin or the like. The detergent liquid generation unit can mix the detergent in the detergent tank 50 with the hot water supplied from the water heater WH to generate the detergent liquid. The opening/closing valve can switch between supplying and stopping the cleaning solution to the cleaning nozzle 42 .

As shown in FIG. 2, water heater main body 1 includes a power supply circuit 15 for receiving electric power from commercial power source PS1 and supplying necessary power to each part of hot water heater main body 1, a control unit 16, and a communication circuit. A circuit 17 is provided. The control unit 16 is configured using a microcomputer or the like (this point is the same for the other control units 21, 31, 61, and 71, which will be described later), and executes various data processing and operation control of each unit.

Remote controllers 6A and 6B for kitchen and bathroom and interface unit 2 are communicatively connected to communication circuit 17 via wiring La, Lb and L1 such as two-core wires. In relation to the wiring L1, the wiring L2, which will be described later, is shorter than the wiring L1. The communication circuit 17 is capable of power line communication (power superimposed communication) such as superimposed two-wire communication, and is capable of supplying power to the kitchen and bathroom remote controllers 6A and 6B and the interface unit 2 and mutual transmission of information signals. .

The kitchen and bathroom remote controllers 6A and 6B are for setting and confirming the operation conditions of the water heater WH and for issuing operation commands for the water heater WH. It includes a communication circuit 60, a control section 61, a display section 62, an operation section 63 including a plurality of operation switches, a speaker SP, and the like. These kitchen and bathroom remote controllers 6A and 6B can also be operated to execute, for example, opening/closing operation of the automatic drain plug 41, operation of starting bathtub washing using the bathtub washing apparatus A, and the like.

The power supply control device 3 supplies drive power to the automatic drain plug 41 and the bathtub cleaning device A, and controls their operation. A power supply circuit 30, a control section 31, and a communication circuit 32 are provided for supplying power. As will be described later, the communication circuit 32 is divided into first and second communication circuits 32A and 32B, which will be described later.

The control unit 31 of the power supply control device 3 is directly or indirectly connected to the drain plug driving device 44 , the functional unit 5 constituting the bathtub cleaning device A, and the bathtub cleaning remote controller 7 . The bathtub cleaning remote controller 7 is for remotely operating the power supply control device 3. For example, like the kitchen and bathroom remote controllers 6A and 6B, a communication circuit 70, a control section 71, a display section 72, and an operation section 73 are provided. , a speaker SP, and the like. Although not shown in FIG. 2, the power supply control device 3 has power line communication (superimposed two-core line communication) with the communication circuit 70 of the bathtub cleaning remote controller 7 via wiring Ld such as a two-core line. A capable communication circuit is provided.

As shown in FIG. 1, the drain plug driving device 44 has a motor (not shown) connected to the automatic drain plug 41 via a wire 45, and the motor pulls the wire 45 and releases it. Thereby, the automatic drain plug 41 can be opened and closed.
As described above, the functional unit 5 of the bathtub cleaning device A is a unit that includes a predetermined detergent liquid generating section, an opening/closing valve, and the like.
The drain plug driving device 44 and the functional unit 5 are connected to the power supply control device 3 via composite wiring Le, Lf consisting of a power supply line and a signal line. It is supplied and controlled by the power supply controller 3 .

The interface unit 2 is interposed between the hot water heater WH and the power supply control device 3, and receives signals of the first communication protocol used for data communication with the water heater WH and data communication with the power supply control device 3. When receiving one of the signals of the second communication protocol used in , it converts it to the other and plays a role of outputting, enabling mutual data communication between the water heater WH and the power supply control device 3 It is something to do.
More specifically, the first communication protocol is a mutual communication protocol between water heater main unit 1 and kitchen and bathroom remote controllers 6A and 6B. In this embodiment, the bathtub cleaning device A and the power supply control device 3 and the hot water supply device WH are manufactured by different manufacturers, and the first and second communication protocols are different from each other.

The interface unit 2 includes communication circuits 20A and 20B, a control section 21, and a power supply circuit 22.
As described above, the communication circuit 20A is connected to the communication circuit 17 of the water heater WH via the wiring L1, and is capable of power line communication such as superimposed two-wire communication. The interface unit 2 receives power supply from the hot water supply apparatus WH via the wiring L1. The communication circuit 20B is connected to the communication circuit 32 of the power supply control device 3 via wiring L2 as a signal line. Control unit 21 receives a signal of the first communication protocol from hot water supply apparatus WH at communication circuit 20A, and outputs the signal from communication circuit 20B to power supply control device 3 side according to the second communication protocol. On the contrary, when communication circuit 20B receives a signal of the second communication protocol from power supply control device 3, it outputs the signal from communication circuit 20A to water heater WH side according to the first communication protocol.

As described above, the communication circuit 32 of the power supply control device 3 is divided into first and second communication circuits 32A and 32B. These first and second communication circuits 32A and 32B are photocoupler Signal transmission is enabled via 33a and 33b, and they are electrically insulated from each other.
The first communication circuit 32A is connected to the interface unit 2 via the power supply line Lc in addition to the wiring L2, and receives power from the interface unit 2. FIG. A power supply source for the power supply line Lc is the power supply circuit 22, and the power supply circuit 22 is supplied with power from the water heater WH through the communication circuit 20A. The second communication circuit 32B is driven by power supply from the power supply circuit 30, and information received by the second communication circuit 32B from the first communication circuit 32A is input to the control unit 31, and the control unit 31 The received information is transmitted to the first communication circuit 32A.

As shown in FIG. 1, the interface unit 2 and the power supply control device 3 are installed in the ceiling space (above the ceiling panel 49) of the bathroom in which the bathtub 40 is provided. The wiring L2 is shorter than the wiring L1, so that the wiring L2 can be easily routed behind the ceiling. In addition, it is less susceptible to electromagnetic noise and the like.
In FIG. 1, reference numerals 48a and 48b denote wiring connectors. However, they are omitted in FIG.

Next, a specific example of operation control of each part in the bath system SY will be described with reference to FIGS. 3 to 5. FIG.

In FIG. 3, when one of the kitchen and bathroom remote controllers 6A and 6B of the water heater WH is used to open or close the automatic drain valve 41 of the bathtub 40 (S1), A control signal Sa instructing that effect is transmitted from the hot water supply apparatus WH to the interface unit 2 using the first communication protocol. The control signal Sa corresponds to a specific example of the "signal of drain plug-related information" referred to in the present invention.

Upon receiving the control signal Sa, the interface unit 2 transmits it to the power supply control device 3 as a control signal Sa' conforming to the second communication protocol. As a result, the power supply control device 3 can appropriately determine the content (information) of the control signal Sa', and the automatic drain plug 41 is controlled to open or close (S2 ).

After that, the power supply control device 3 returns a response signal Sb' to the effect that the automatic drain plug 41 has been set to the open state or the closed state to the interface unit 2 using the second communication protocol. Then, the response signal Sb' is returned from the interface unit 2 to the hot water supply apparatus WH as a response signal Sb conforming to the first communication protocol. Therefore, in the water heater WH, it is confirmed that the automatic drain plug 41 has been appropriately controlled to the open state or the closed state in response to the previous control signal Sa, and the current state of the automatic drain plug 41 can be accurately determined. can grasp.

4, one of the kitchen and bathroom remote controllers 6A and 6B of the water heater WH is used to perform operations related to the operation of the bathtub cleaning apparatus A, such as an operation to start cleaning the bathtub. Alternatively, when an operation is performed to interrupt bathtub cleaning that has already started (S11), a control signal Sc instructing that effect is transmitted from water heater WH to interface unit 2 using the first communication protocol. The control signal Sc corresponds to a specific example of the "signal of bathtub washing-related information" referred to in the present invention.

Upon receiving the control signal Sc, the interface unit 2 transmits it to the power supply control device 3 as a control signal Sc' conforming to the second communication protocol. As a result, the power supply control device 3 can appropriately determine the content (information) of the control signal Sc', and performs control such as starting or stopping the operation of the bathtub cleaning device A. (S12).

Further, when such control is executed, a response signal Sd' is returned from the power supply control device 3 to the interface unit 2 using the second communication protocol. Further, this response signal Sd' is returned from the interface unit 2 to the water heater WH as a response signal Sd conforming to the first communication protocol. As a result, in the hot water supply apparatus WH, it is confirmed that the bathtub cleaning apparatus A has been properly controlled in response to the previous control signal Sc.

As can be understood from the control shown in FIGS. 3 and 4, although the communication protocol between the water heater WH and the power supply control device 3 is different, by converting the communication protocol using the interface unit 2, Data communication can be appropriately performed between them to control the automatic drain plug 41 and the bathtub cleaning device A. As the hot water supply device WH and the power supply control device 3, it is possible to use products of different manufacturers with different communication protocols, which is highly flexible and convenient.

If, for example, a sensor or the like malfunctions during the bathtub cleaning, the power supply control device 3 causes the bathtub cleaning remote controller 7 to notify the user of the error. However, if the automatic drain plug 41 is not out of order, its opening/closing operation can be controlled. Therefore, even if the above-described error reporting process is performed, as shown in FIG. This signal is transmitted to the power supply control device 3, and the automatic drain plug 41 is appropriately controlled.

In the bath system SY of this embodiment, processing for determining whether communication is normal or abnormal is also executed.
Specifically, as shown in FIG. 5(a), the power supply control device 3 executes the process of determining whether the communication is normal or abnormal at a predetermined short cycle (S21). At the start of this process, a predetermined signal Se' for judging normality/abnormality of communication is transmitted from the power supply control device 3 to the interface unit 2 . As a result of this transmission, the signal Se′ is converted into the signal Se conforming to the first communication protocol and its response signal Sf in mutual communication between the interface unit 2 and the water heater WH, and then the second communication When it is returned to the power supply control device 3 as a predetermined response signal Sf' conforming to the protocol within a predetermined time, the power supply control device 3 determines that the communication in the bath system SY is normal.

Unlike the above, as shown in FIG. 5(b), even though the signal Se' is transmitted from the power supply control device 3 to the interface unit 2, the response signal Sf' is not returned within a predetermined time. Sometimes. In this case, the power supply control device 3 determines that there is a communication abnormality (S23), and notifies the fact using the bathtub cleaning remote controller 7 (S24). As a result, the user can accurately perceive that there is an abnormality in the communication system of the bath system SY, and quickly eliminate the abnormality.

In FIG. 5, the process of determining whether communication is normal or abnormal is executed by the power supply control device 3, but instead of this, for example, as shown in FIG. can. That is, at the start of the process of determining whether the communication is normal or abnormal (S25), a predetermined signal Se is transmitted from the hot water supply apparatus WH to the interface unit 2. FIG. As a result of this transmission, if there is no predetermined appropriate response signal within a predetermined time, the water heater WH determines that the communication in the bath system SY is abnormal (S26), and informs the kitchen and bathroom remote control 6A of this fact. , 6B (S27). Unlike this, if there is a predetermined appropriate response signal within a predetermined time, it is determined that communication in bath system SY is normal.

The interface unit 2 is supplied with power from the hot water supply device WH, and has a power supply system independent from the power supply control device 3 . Therefore, when a failure occurs in either the interface unit 2 or the power supply control device 3, it is possible to determine whether the failure is on the interface unit 2 side or on the power supply control device 3 side. become clear. The warranty categories for such failures are also clarified, and it is also possible to preferably prevent troubles regarding failure repairs or quality assurance by manufacturers and distributors.

The first and second communication circuits 32A, 32B provided in the power supply control device 3 enable signal transmission via photocouplers 33a, 33b and are electrically insulated from each other. Therefore, if an electrical failure (abnormal situation) occurs on either the interface unit 2 side including the first communication circuit 32A or the power supply control device 3 side including the second communication circuit 32B, Also, the effect of preventing this failure from affecting the other can be expected, and the electrical failure range can be prevented from widening.

In addition, according to the present embodiment, the interface unit 2 and the power supply control device 3 are installed in the ceiling space of the bathroom with good space efficiency, and the installation workability is also good.
Since the water heater WH, the interface unit 2, and the power supply control device 3 are connected by wire using the wirings L1 and L2, stable communication is possible compared to the case of adopting wireless communication. be. In addition, since the wiring L2 is short, it is difficult for noise to be picked up, and communication can be stabilized.

The invention is not limited to the content of the embodiments described above. The specific configuration of each part of the bath system according to the present invention can be changed in various ways within the intended scope of the present invention.

In the above-described embodiment, the bathtub cleaning device is provided in addition to the automatic drain plug, but the present invention is not limited to this. It is also possible to have a bath system with only an automatic drain valve.
The automatic drain plug is a plug that can switch on/off the drainage of hot water from the bathtub, but its specific structure, opening/closing mechanism, etc. are not limited.
The "drain plug-related information signal" referred to in the present invention is not limited to the control signal for opening or closing the automatic drain plug, and may be a control signal with other contents. Further, the "signal of information related to bathtub cleaning" as used in the present invention is not limited to a control signal for starting or interrupting bathtub cleaning, and may be a control signal containing other operation instructions related to bathtub cleaning. You can also

The interface unit has a function of outputting a control signal for causing the power supply control device to automatically open and close the drain plug when receiving a signal of predetermined drain plug-related information from the water heater. should have As an example of such a function, it has a function of converting the communication protocol of the water heater (first communication protocol) into the communication protocol of the power supply control device (second communication protocol). A function of outputting the control signal to the power supply control device according to the second communication protocol when a predetermined control signal output according to the communication protocol is received. Specific contents of the first and second communication protocols are not limited.
In the present invention, the interface unit is prevented from receiving power supply from the power supply control device. It is also possible to adopt a configuration in which power is supplied from a power supply source (commercial power supply, etc.).

The power supply control device only needs to be able to supply drive power to the automatic drain plug and control the operation.
The hot water heater may be, for example, a hot water storage type hot water heater instead of an instantaneous hot water heater having a burner and a heat exchanger.

A Bathtub cleaning device SY Bath system WH Water heater 2 Interface unit 3 Power supply control device 32A, 32B First and second communication circuits 33a, 33b Photocoupler 40 Bathtub 41 Automatic drain plug

Claims (6)

a power supply control device capable of executing drive power supply and operation control of an automatic drain valve of a bathtub;
a water heater capable of supplying hot water to the bathtub and capable of outputting a signal of drain plug-related information related to opening/closing of the automatic drain plug;
A bath system comprising
connected to each of the hot water supply device and the power supply control device, and when receiving a signal of the drain plug-related information from the hot water supply device, the automatic drainage is sent to the power supply control device in accordance with the content of the signal. further comprising an interface unit that outputs a control signal for executing the opening and closing operation of the tap;
The interface unit is configured to receive power from the water heater or a power supply source separate from the water heater, and can be driven without receiving power from the power supply control device. A bath system characterized by: A bath system according to claim 1,
Communication is performed between the water heater and the interface unit according to a first communication protocol, while communication between the interface unit and the power supply control device is performed using the first communication protocol. communication is performed in a different second communication protocol;
When the interface unit receives a signal of the drain plug-related information from the water heater using the first communication protocol, the interface unit transmits a corresponding signal to the power supply control device using the second communication protocol. A bath system that consists of The bath system according to claim 1 or 2,
The bath system, wherein the interface unit is wire-connected to the water heater and configured to receive power supply from the water heater. The bath system according to any one of claims 1 to 3,
When the power supply control device receives the control signal from the interface unit and operates the automatic drain plug in accordance with the content of the control signal, a response signal to that effect is sent via the interface unit. and a bath system configured to return to the hot water heater. The bath system according to any one of claims 1 to 4,
The power supply control device includes a first communication circuit that is wire-connected to the interface unit and supplied with power from the interface unit as a communication circuit for performing data communication with the interface unit; a second communication circuit capable of signal transmission via the first communication circuit and a photocoupler and receiving power from a power supply circuit included in the power supply control device;
The bath system, wherein the first and second communication circuits are electrically isolated from each other. The bath system according to any one of claims 1 to 5,
further comprising a bathtub cleaning device that operates by receiving power supply from the power supply control device and is capable of cleaning the bathtub using hot water supplied from the hot water supply device,
The hot water supply device is capable of outputting a signal of bathtub cleaning-related information related to the operation of the bathtub cleaning device,
The interface unit outputs a control signal for operating the bathtub cleaning device to the power supply control device in accordance with the content of the bathtub cleaning-related information signal received from the hot water supply device. A bath system that consists of

Images