JP2019011898A - Bath device - Google Patents

Abstract

To provide a bath device that can improve comfort during bathing.SOLUTION: A heat source machine 100 increases the temperature of hot and cold water 21 circulating through a circulating path 8 by exchanging heat with a heat medium. A pump 10 is connected to the circulating path 8, and circulates the hot and cold water 21 between a bathtub 20 and the circulating path 8. An entry sensor 33 detects that a bathing person 40 enters a bathroom 200 and leaves it. A bathing sensor 11 detects that the bathing person 40 bathes in the bathtub 20. A control unit 12 controls the heat source machine 100 and the pump 10 so as to increase the temperature of the hot and cold water 21 in the bathtub 20 to a set temperature when it is detected by the bathing sensor 11 that the bathing person 40 bathes. The control unit 12 also controls the heat source machine 100 and the pump 10 so as to decrease the temperature of the hot and cold water 21 by exchanging heat with the heat medium when it is detected by the entry sensor 33 that the bathing person 40 leaves the bathroom 200.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bath apparatus, and more particularly, to a bath apparatus provided with a heat source device for heating hot water in a bathtub.

  As one aspect of the bath apparatus, for example, Japanese Patent No. 3331123 (Patent Document 1) includes a pump that circulates hot water in the bathtub, and a heater that heats the hot water in a state where the hot water in the bathtub is circulated by the pump. The heater is controlled based on the temperature detection means for detecting the temperature of the hot water in the bathtub, the hot water temperature adjustment instruction signal from the hot water temperature setting means for setting the hot water temperature, and the detected temperature signal from the temperature detection means. A bathtub temperature control device comprising a control means is described. In Patent Document 1, an auxiliary heat exchanger is further installed in the hot water circulation path. In the above configuration, when an instruction signal for lowering the hot water temperature is input from the hot water temperature setting means, the control means causes the hot water in the bathtub to circulate by the pump and the auxiliary heat from the outdoor heat exchanger of the air conditioner. The exchanger is configured to supply a low-temperature heat medium.

Patent No. 3331123

  In the bath apparatus described in Patent Document 1, the temperature of the hot water in the bathtub can be adjusted to the set temperature while keeping the water level in the bathtub constant.

  However, depending on the set temperature, an abrupt temperature change may occur in a series of actions from room to bathing such as a dressing room and subsequent bathing. For example, if the temperature changes rapidly, such as from a warm room to a cold dressing room, and then hot bathing, there is a concern that the body of the bather will be burdened and the comfort of the bather will be reduced.

  When a bath device is used in a general home, each person constituting the home may take a bath in order. In such a case, it is required that the burden on the body can be reduced and high comfort can be provided for any person from the first bathing person to the last bathing person.

  This invention is made | formed in view of the said subject, The objective is to provide the bath apparatus which can improve the comfort at the time of bathing.

  In one aspect of the present invention, a bath apparatus is connected to a bathtub installed in a bathroom, and includes a circulation path, a heat transfer unit, a pump, an entrance sensor, a bath sensor, a temperature sensor, and a control unit. . A circulation path circulates the hot water of a bathtub in the state connected to the bathtub. The heat transfer unit is configured to adjust the temperature of hot water circulating in the circulation path by heat exchange with the heat medium. The pump is connected to the circulation path and configured to circulate hot water between the bathtub and the heat transfer unit. The entrance sensor detects entry and exit of a bather into the bathroom. The bathing sensor detects bathing of the bather into the bathtub. The temperature sensor detects the temperature of hot water in the bathtub. The control unit is configured to control the heat transfer unit and the pump based on detection signals of the room entrance sensor, the bathing sensor, and the temperature sensor. In the bath apparatus, the pouring operation to the bathtub is performed at an initial temperature lower than the set temperature. A control part controls a heat-transfer part and a pump so that the temperature of the hot water of a bathtub may be raised to preset temperature, when it is detected by the bath sensor that the bather took a bath. Further, when the entrance sensor detects that the bather has left the bathroom, the control unit transfers the hot water to a temperature lower than the set temperature by heat exchange with the heat medium. Control the hot section and pump.

  According to the above bath apparatus, the bath water temperature when the next bather takes a bath can be made lower than the set temperature by lowering the bath water temperature after the bather leaves the bathroom. The bath water temperature can be raised to the set temperature later. Therefore, the burden on the body due to a rapid temperature change that occurs during a series of actions up to bathing can be reduced and a comfortable feeling can be given to the next bather. As a result, it is possible to provide a bath apparatus that can improve comfort during bathing.

  Preferably, in the bath apparatus, the control unit controls the heat transfer unit and the pump so that the temperature of the hot water when the entrance sensor detects that the bather has entered the bathroom is the initial temperature. The control unit further controls the heat transfer unit and the pump so as to lower the temperature of the hot water to the initial temperature when the entrance sensor detects that the bather has left the bathroom.

  By configuring in this way, the bath water temperature is lowered from the initial temperature to the set temperature after taking a bath for the next bather by lowering the bath water temperature to the initial temperature after the bather leaves the bathroom. Since the temperature can be raised, the burden on the body due to a rapid temperature change that occurs during a series of actions up to bathing can be reduced, and a comfortable feeling can be given.

  Preferably, in the bath apparatus, the controller raises the temperature of the hot water from the initial temperature to the set temperature when the bathing sensor detects that the bather has taken a bath after the temperature of the hot water is lowered to the initial temperature. As such, the heat transfer section and the pump are controlled.

  By comprising in this way, bath water temperature can be raised to preset temperature, after the next bather takes a bath.

  Preferably, the bath device further includes a notifying unit for notifying that the temperature of the hot water has decreased to the initial temperature after the entrance sensor detects that the bather has left the bathroom.

  By setting it as such a structure, it can alert | report to the next bather that the hot water of the bathtub became suitable temperature suitable for bathing.

  Preferably, in the bath apparatus, the heat transfer section performs heat exchange between the combustion section that generates fuel by burning fuel, a fan that supplies air to the combustion section, and the combustion gas and hot water in the bathtub. Including heat exchanger. The circulation path has a return pipe connected to the input end of the heat exchanger and a forward pipe connected to the output end of the heat exchanger. The control unit activates the fan and the pump while the combustion unit is stopped when the entrance sensor detects that the bather has left the bathroom.

  By setting it as such a structure, after a bather leaves a bathroom, bath water temperature can be reduced rapidly.

  Preferably, in the bath apparatus, the heat transfer unit is configured to perform a heating operation for heating a heat medium supplied to an external heating terminal. The heat transfer unit includes a heating mechanism for heating the heat medium, a heating circulation path for circulating the heat medium heated by the heating mechanism between the heating terminal and the heat exchange between the liquids during heating operation. A heat exchanger having a primary path and a secondary path, a bypass path, and a flow rate control mechanism are included. The bypass path is configured to be branched from the heating circulation path so that the heat medium flows through the primary side path of the heat exchanger without passing through the heating terminal and then merges with the heating circulation path again. The flow rate control mechanism controls a distribution ratio, which is a ratio of the flow rate of the heat medium supplied to the bypass path to the total flow rate of the heat medium heated by the heating mechanism. The circulation path has a return pipe connected to the input side of the secondary side path and a forward pipe connected to the output side of the secondary side path. The heating mechanism includes a combustion section that burns fuel and generates combustion gas, and a fan that supplies air to the combustion section. When it is detected by the entrance sensor that the bather has left the bathroom, the control unit operates the pump and the fan while stopping the combustion unit, and the distribution rate is determined so that the total amount of the heat medium is bypassed. The flow rate control mechanism is controlled so as to be set to a value supplied to.

  By setting it as such a structure, after a bather leaves a bathroom, bath water temperature can be reduced rapidly.

  According to this invention, the bath apparatus which can improve the comfort at the time of bathing can be provided.

It is the schematic which shows the structure of the bath apparatus which concerns on Embodiment 1 of this invention. It is a functional block diagram for demonstrating the structure of the controller shown in FIG. It is a figure which shows the time change of the bath water temperature after completion of hot water filling. It is a flowchart for demonstrating the process procedure of the chasing operation and heat dissipation operation in the bath apparatus which concerns on this Embodiment 1. FIG. It is a flowchart for demonstrating in detail the heat dissipation driving | operation by step S80-S100 of FIG. It is the schematic which shows the structure of the bath apparatus which concerns on Embodiment 2 of this invention. It is a flowchart for demonstrating the process procedure of the chasing operation and heat dissipation operation in the bath apparatus which concerns on this Embodiment 2. FIG. It is a flowchart for demonstrating in detail the heat dissipation driving | operation by step S80-S100 of FIG.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In the following, the same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated in principle.

[Embodiment 1]
FIG. 1 is a schematic diagram showing a configuration of a bath apparatus according to Embodiment 1 of the present invention.

  Referring to FIG. 1, bath apparatus 300 according to Embodiment 1 includes heat source device 100. A bath apparatus bathtub (hereinafter simply referred to as a “bathtub”) 20 is a bathtub that is installed in the bathroom 200 and bathed by the bather 40. The heat source device 100 according to the present embodiment can supply hot water 21 to the bathtub 20.

  The heat source device 100 includes a housing 1, a burner 2 (combustion unit), a fan 3, a heat exchanger 4, a water supply pipe 5, a hot water supply pipe 6, a mixing valve 7, a circulation path 8, a temperature sensor 9, a pump 10, and a water level sensor 11. , Controller 12, two-way valve 13, electrical wiring 14, switch 15, remote controller 30, and entrance sensor 33.

  The housing 1 is provided so as to communicate with the inside and outside of the housing 1 and has an exhaust port 1a for exhausting combustion gas. The housing 1 can accommodate a burner 2, a fan 3, a heat exchanger 4, a water supply pipe 5, a hot water supply pipe 6, a mixing valve 7, a temperature sensor 9, a pump 10, a water level sensor 11, a controller 12, and a two-way valve 13. It is configured. The housing 1 is configured to be able to accommodate a part of the circulation path 8.

  The burner 2 is configured to receive a fuel gas from a fuel supply system (not shown) and perform a combustion operation. The burner 2 supplies combustion gas to the heat exchanger 4. The burner 2 has a hot water supply burner 2a and a memorial burner 2b.

  The heat exchanger 4 has a heat exchanger 4a for hot water supply and a heat exchanger 4b for remedy. The heat exchangers 4a and 4b are respectively disposed above the burners 2a and 2b in the height direction of the heat source apparatus 100. The heat exchangers 4a and 4b are disposed in the vicinity of the exhaust port 1a.

  The heat exchanger 4a recovers the heat of the combustion gas supplied by the burner 2a. The heat exchanger 4b recovers the heat of the combustion gas supplied by the burner 2b. Each of the heat exchangers 4a and 4b was passed by a primary heat exchanger that heats the incoming water by heat exchange by sensible heat (combustion heat) of the combustion gas of the burner 2 and the latent heat of the combustion exhaust gas from the burner 2. A secondary heat exchanger that heats water by heat exchange may be included.

  A water supply pipe 5 is connected to one end of the heat exchanger 4a, and a hot water supply pipe 6 is connected to the other end. The water supply pipe 5 supplies tap water or the like from the water inlet 5a to the heat exchanger 4a. The hot water supply pipe 6 supplies hot water heated by the heat exchanger 4 from the heat exchanger 4a to the hot water outlet 6a. Thereby, the tap water supplied from the water supply pipe 5 is heated to a predetermined temperature (for example, a temperature set by the user) by the heat exchanger 4a and discharged from the hot water supply pipe 6. Hot water discharged from the hot water supply pipe 6 is supplied to a predetermined hot water supply location such as a hot water tap (not shown) or a return pipe 8a in the kitchen or bathroom 200 or the like. The water supply pipe 5 and the hot water supply pipe 6 are connected to the mixing valve 7.

  The fan 3 supplies combustion air to the burner 2. The fan 3 includes a fan 3a that supplies combustion air to the burner 2a and a fan 3b that supplies combustion air to the burner 2b. Each of fans 3a and 3b has a blade and a motor for rotating the blade. When electric current is applied to the motor, the blades rotate to supply combustion air. The fans 3a and 3b are respectively disposed below the burners 2a and 2b in the height direction of the heat source device 100.

  The circulation path 8 is for circulating the hot water 21 of the bathtub 20 while being connected to the bathtub 20, and has a return pipe 8a and a forward pipe 8b. The return pipe 8a is connected to the input side of the heat exchanger 4b, and the forward pipe 8b is connected to the output side of the heat exchanger 4b.

  The return pipe 8a supplies hot water 21 from the bathtub 20 to the heat exchanger 4b. Outward piping 8b supplies hot water 21 warmed by heat exchanger 4b from heat exchanger 4b to bathtub 20. Thereby, when the hot water 21 supplied from the bathtub 20 to the heat exchanger 4b flows through the heat exchanger 4b, it is heated by the combustion gas and supplied to the bathtub 20 again.

  A temperature sensor 9, a pump 10, and a water level sensor 11 are connected to the return pipe 8a. The return pipe 8 a and the hot water supply pipe 6 are connected to the two-way valve 13. The two-way valve 13 is configured to supply hot water from the hot water supply pipe 6 to the return pipe 8a. By opening the two-way valve 13, hot water heated to a predetermined temperature is introduced from the hot water supply pipe 6 through the return pipe 8 a into the bathtub 20.

  The temperature sensor 9 detects the temperature of the hot water 21 in the bathtub 20 (hereinafter also referred to as bath water temperature) by detecting the temperature of the hot water 21 in the circulation path 8. The temperature sensor 9 is, for example, a thermistor.

  The pump 10 circulates hot water in the bathtub 20 and the circulation path 8. When the pump 10 is actuated, the hot water 21 from the bathtub 20 circulates along the path to the bathtub 20 via the return pipe 8a, the heat exchanger 4b, and the forward pipe 8b. Thereby, the memorial circulation path which circulates the hot water 21 between the bathtub 20 and the heat exchanger 4b is formed.

  The water level sensor 11 detects the water level of the hot water 21 in the bathtub 20 based on the water pressure of the hot water 21 circulating in the circulation path 8. The water level sensor 11 is a pressure sensor, for example. In the present embodiment, as will be described later, the water level sensor 11 also has a bathing sensor for detecting that the bather 40 has bathed.

  The controller 12 controls the operation of the heat source apparatus 100 so that the bath apparatus 300 is operated according to the user instruction based on the input setting operation by the user or the like from the remote controller 30. For example, the controller 12 can be configured to include a microcomputer and a memory.

  The controller 12 is electrically connected to the burners 2a and 2b, the fans 3a and 3b, the temperature sensor 9, the pump 10, the water level sensor 11, the two-way valve 13, the electric wiring 14, the switch 15, and the remote controller 30. The electrical wiring 14 is configured to supply power to the controller 12 by being connected to a power source (not shown).

  The switch 15 drives the water level sensor 11. When the entrance sensor 33 detects that the bather 40 has entered the bathroom 200, the switch 15 is turned on, and when the entrance sensor 33 detects that the bather 40 has exited the bathroom 200, the switch 15 is configured to be in a cut-off (off) state. The water level sensor 11 is driven when the switch 15 is in the ON state, detects the water level of the hot water 21 in the bathtub 20, and outputs a signal indicating the detected water level to the controller 12.

  The remote controller 30 is installed in the bathroom 200 and is for operating the heat source apparatus 100. The remote control 30 includes a display unit 31 for displaying information and an operation unit 32 for receiving an input setting operation by a user or the like. The display part 31 is comprised so that the water level and temperature of the hot water 21 of the bathtub 20 can be displayed. The operation unit 32 is configured to receive a setting operation related to the water level and temperature of the hot water 21 in the bathtub 20.

  The entrance sensor 33 is provided in the case of the remote controller 30, for example. The entrance sensor 33 is configured to detect that the bather 40 has entered the bathroom 200. The entrance sensor 33 is an infrared sensor, for example. The entrance sensor 33 is not limited to an infrared sensor, and may be a radio wave sensor and an ultrasonic sensor, for example.

  Moreover, the entrance sensor 33 may be provided in the case of the bathroom heater (not shown) installed in the ceiling of the bathroom 200, for example. Alternatively, the room entry sensor 33 may be a switch operated by the bather 40 when entering the room, such as a switch for lighting the bathroom 200, for example.

FIG. 2 is a functional block diagram for explaining the configuration of the controller 12 shown in FIG.
With reference to FIG. 2, the controller 12 includes an entrance determination unit 120, a water level determination unit 122, a temperature determination unit 124, and a control unit 126.

  The entrance determination unit 120 determines whether the bather 40 has entered the bathroom 200 or whether the bather 40 has exited the bathroom 200 based on the detection signal transmitted from the entrance sensor 33. For example, when the entrance sensor 33 is an infrared sensor, the entrance determination unit 120 determines that the bather 40 has entered the room when there is a temperature change from the surrounding temperature condition. The room entry determination unit 120 determines that the bather 40 has left the room when there is no temperature change for a predetermined time.

  Alternatively, when the entrance sensor 33 is a radio wave sensor, the entrance determination unit 120 determines that the bather 40 has entered the room when the output voltage of the radio wave sensor changes. The room entry determination unit 120 determines that the bather 40 has left the room when there is no change in the output voltage for a predetermined time.

  Alternatively, when the room entry sensor 33 is an ultrasonic sensor, the room entry determination unit 120 determines that the bather 40 has entered the room when the output voltage of the ultrasonic sensor changes. The room entry determination unit 120 determines that the bather 40 has left the room when there is no change in the output voltage for a predetermined time.

  Based on the detection signal transmitted from the water level sensor 11, the water level determination unit 122 has the bather 40 entered the bath 20 (has taken a bath) or the bather 40 has left the bath 20 (has taken a bath) ). When the water level sensor 11 detects a rise in the water level of the bathtub 20 even though there is no water injection or the like to the bathtub 20, the water level determination unit 122 enters the bathtub 20 (that is, the bather 40 takes a bath). Determined). Moreover, after determining that the bather 40 has taken a bath, when the water level sensor 11 detects a drop in the water level of the bathtub 20, it is determined that the bather 40 has left the bathtub 20 (that is, the bather 40 has retreated). To do.

  The temperature determination unit 124 determines the temperature of the hot water 21 in the bathtub 20 (bath hot water temperature) based on the temperature of the hot water 21 flowing through the return pipe 8 a detected by the temperature sensor 9.

  The control unit 126 controls the operations of the two-way valve 13, the burners 2 a and 2 b, the fans 3 a and 3 b, and the pump 10 based on the determination results in the entry determination unit 120, the water level determination unit 122, and the temperature determination unit 124. Specifically, the control unit 126 operates the two-way valve 13 so that the water level of the bathtub 20 determined by the water level determination unit 122 becomes the set water level, and supplies the hot water 21 from the hot water supply pipe 6 to the bathtub 20.

  Further, the control unit 126 determines that the bath water temperature determined by the temperature determination unit 124 becomes the set temperature T * based on the determination of the bather 40 bathing by the water level determination unit 122, the burner 2a, the fan 3a and the pump 10 are operated to heat the hot water 21.

  In addition, the control unit 126 stops the burner 2a and releases the hot water 21 by operating the fan 3a and the pump 10 when the entrance determination unit 120 determines that the bather 40 has left the bathroom 200. By doing so, the bath water temperature is lowered to the initial temperature T #.

Next, the operation of the bath apparatus 300 shown in FIG. 1 will be described.
First, a normal hot water supply operation will be described. The hot water supply operation is started when a hot water tap (not shown) is opened and a water flow rate equal to or higher than the minimum operating flow rate is detected by a flow rate sensor (not shown) arranged in the water supply pipe 5. When the hot water supply operation is started, the set hot water temperature set by the remote controller 30 and the hot water temperature are made equal by the combustion control of the burner 2b and the mixing ratio control of the high temperature water and the low temperature water by the mixing valve 7. The heat source device 100 operates.

  Further, when “bath hot water filling” is instructed from the remote controller 30, the hot water supply operation to the bathtub 20 is executed by opening the two-way valve 13. Below, in order to distinguish the hot water supply operation to the bathtub 20 from the hot water supply operation from a hot-water tap, it is also called "hot water injection operation" in particular. Alternatively, when the “automatic bath mode” is instructed, a hot water pouring operation is executed for initial hot water filling or for maintaining a constant water level. In the bath automatic mode, the hot water 21 of the bathtub 20 after completion of the hot water filling is automatically kept at a constant temperature.

  The bath apparatus 300 according to the first embodiment sets “set temperature T *” based on the input setting operation by the user or the like from the remote controller 30 as the target temperature of the hot water 21 of the bathtub 20 after filling. It has an “initial temperature T #” lower than the temperature T *. The initial temperature T # is set to a temperature lower by about 2 ° C. than the set temperature T *, for example. In the pouring operation, the hot water 21 of the bathtub 20 after completion of the hot water filling is kept at the initial temperature T #. As will be described later, the hot water 21 of the bathtub 20 is heated from the initial temperature T # to the set temperature T * by the chasing operation performed after the bathing detection of the bather 40 is detected.

  During the pouring operation, hot water (mixed high temperature water and low temperature water) branched from the hot water supply pipe 6 is poured into the bathtub 20 via the circulation path 8. The pouring operation is continued until the water level of the bathtub 20 reaches the set water level based on the detection signal of the water level sensor 11.

  During the pouring operation, hot water from the hot water supply pipe 6 is supplied to the junction 8c on the circulation path 8 through the two-way valve 13 with the pump 10 stopped. For this reason, from both the path from the junction 8c to the bathtub 20 through the return pipe 8a and the path from the junction 8c to the bathtub 20 via the heat exchanger 4b and the outgoing pipe 8b, the bathtub 20 is reached. The hot water is poured.

  In the memorial operation, automatic boiling up to the initial temperature T # after completion of the hot water filling, automatic boiling up to the set temperature T * after the bathing detection of the bather 40, and the hot water 21 in the bathtub 20 at a constant temperature (set temperature T * Or is started by automatic boiling for keeping the temperature at the initial temperature T #) or by boiling based on a memorial command from the user. In the memorial operation, the hot water 21 of the bathtub 20 circulates in the circulation path 8 by operating the pump 10. Furthermore, by the combustion control of the burner 2a, the circulating water is raised to a predetermined temperature (set temperature T * or initial temperature T #) based on a detection signal from the temperature sensor 9, and then supplied to the bathtub 20 again.

  The heat radiation operation is started when the bather 40 leaving the bathroom 200 is detected. In the heat radiation operation, the hot water 21 of the bathtub 20 circulates in the circulation path 8 by operating the pump 10. Furthermore, when the fan 3a is operated with the burner 2a stopped, the circulating water is lowered from the set temperature T * to the initial temperature T # based on the detection signal from the temperature sensor 9.

  Next, with reference to FIG. 3, the memorial operation and the heat radiation operation in the bath apparatus 300 according to the first embodiment will be described.

  FIG. 3 is a diagram showing a temporal change in bath water temperature after completion of hot water filling. In the following description, the first bather 40 after completion of the hot water filling is referred to as a “first bather”, and the second bather 40 is referred to as a “second bather”.

  Referring to FIG. 3, it is assumed that the initial hot water filling is completed at time t <b> 0 by performing the pouring operation. After the completion of the hot water filling, automatic boiling is performed by the chasing operation, whereby the bath water temperature rises to the initial temperature T #. Further, after time t0, a chasing operation for keeping the bath water temperature at the initial temperature T # is executed.

  Assume that the entry of the first bather 40 into the bathroom 200 is detected based on the detection signal from the entry sensor 33 at time t1 after time t0. Furthermore, it is detected that the first bather 40 has taken a bath based on the detection signal from the water level sensor 11 at time t2 following time t1.

  When bathing of the first bather 40 is detected at time t2, a chasing operation is performed so that the bath water temperature becomes the set temperature T *. The controller 126 of the controller 12 causes the hot water 21 in the bathtub 20 to circulate in the circulation path 8 by operating the pump 10. Control unit 126 also raises the bath water temperature from initial temperature T # to set temperature T * by operating fan 3a together with combustion control of burner 2a.

  When the bath water temperature rises at time t3 by such a memorial operation and reaches the set temperature T *, the bath apparatus 300 starts from the memorial operation for raising the bath water temperature to the set temperature T *. The hot water 21 of the bathtub 20 is switched to the chasing operation for keeping the temperature at the set temperature T *.

  In this way, hot water filling is performed at an initial temperature T # lower than the set temperature T *, and the temperature of the bath water is raised to the set temperature T * after the first bather 40 has taken a bath. The burden on the body of the bather due to a rapid temperature change that occurs during a series of actions up to bathing such as subsequent bathing can be reduced. Therefore, a comfortable feeling can be given to the first bather 40.

  Next, when the exit of the first bather 40 from the bathroom 200 is detected based on the detection signal from the entrance sensor 33 at time t4, the heat radiation operation is started. In the heat radiation operation, the bath water temperature is lowered from the set temperature T * to the initial temperature T # based on the detection signal from the temperature sensor 9. The controller 126 of the controller 12 causes the hot water 21 in the bathtub 20 to circulate in the circulation path 8 by operating the pump 10. Control unit 126 lowers bath water temperature from set temperature T * to initial temperature T # by setting burner 2a to a stopped state and operating fan 3a.

  When the bath water temperature decreases at time t5 due to the heat radiation operation and reaches the initial temperature T #, the bath apparatus 300 is switched from the heat radiation operation to the memorial operation for keeping the bath water temperature at the initial temperature T #. . At time t5, the second bather 40 may be notified that the bath water temperature has decreased to the initial temperature T #. For example, it can be notified by the display unit 31 of the remote controller 30 or by voice. Thereby, the 2nd bather 40 can know that the bath water temperature became the temperature suitable for bathing.

  Assume that the entry of the second bather 40 into the bathroom 200 is detected based on the detection signal from the entry sensor 33 at time t6 after time t5. Furthermore, it is assumed that the second bather 40 has been detected based on the detection signal from the water level sensor 11 at time t7 following time t6.

  When bathing of the second bather 40 is detected at time t7, a chasing operation is performed so that the bath water temperature becomes the set temperature T *. The controller 126 of the controller 12 operates the pump 10 and controls the combustion of the burner 2a, thereby raising the bath water temperature from the initial temperature T # to the set temperature T *.

  When the bath water temperature reaches the set temperature T * at time t8 after the time t7, the bath apparatus 300 starts from the memorial operation for raising the temperature of the hot water 21 of the bath 20 to the set temperature T *. The operation is switched to a chasing operation for keeping the hot water 21 at the set temperature T *.

  Thus, after the first bather 40 leaves the bathroom 200, the bath water temperature is lowered to the initial temperature T #, so that the bath water after the second bather 40 has taken a bath as in the first bather 40. The temperature can be raised to the set temperature T *. Therefore, the burden on the body due to the rapid temperature change that occurs in the series of actions up to bathing can be reduced for the second bather 40 as well. As a result, a comfortable feeling can be given to the second bather 40 as well.

  In addition, although illustration is abbreviate | omitted, also about the bather 40 after the 2nd bather 40, the bath water temperature is reduced to the initial temperature T # by performing the heat radiation operation after the bather 40 leaves the bathroom 200. . Thereby, a comfortable feeling can be given also to the bathers 40 after the third bather 40.

  FIG. 4 is a flowchart for explaining the processing procedure of the chasing operation and the heat radiation operation in the bath apparatus 300 according to the first embodiment. The process shown in FIG. 4 can be repeatedly executed by the controller 12.

  Referring to FIG. 4, controller 12 determines whether or not the hot water filling by the pouring operation is completed in step S <b> 10. For example, it is determined that the water level of the bathtub 20 has reached the set water level based on the detection signal of the water level sensor 11, and the bath water temperature has reached the initial temperature T # based on the detection signal of the temperature sensor 9. If determined, step S10 is determined as YES. On the other hand, when it is determined that the water level of bathtub 20 has not reached the set water level, or the bath water temperature has not reached initial temperature T #, step S10 is NO, and the subsequent steps Processing is not performed.

  When the hot water filling is completed (YES in S10), the controller 12 determines whether or not the bather 40 has entered the bathroom 200 based on the detection signal of the entrance sensor 33 in step S20. Until the bather 40 is detected (NO at S20), the processes after step S30 are not executed.

  When the entry of the bather 40 is detected (when YES is determined in S20), the controller 12 determines whether or not the bather 40 has taken a bath based on the detection signal of the water level sensor 11 in step S30. Until bathing of the bather 40 is detected (NO determination in S30), the processing after step S40 is not executed.

  When the bathing of bather 40 is detected (at the time of YES determination in S30), controller 12 performs a chasing operation for raising the bath water temperature to set temperature T * in step S40. The controller 12 heats the hot water 21 of the bathtub 20 that circulates in the circulation path 8 by operating the pump 10 and performing combustion control of the burner 2a.

  After the start of the memorial operation (S40), the controller 12 determines whether or not the bath water temperature has reached the set temperature T * in step S50. In step S50, when the bath water temperature reaches the set temperature T *, a YES determination is made, and a NO determination is maintained until then, and a chasing operation (S40) is executed.

  When the bath water temperature reaches the set temperature T * (when YES is determined in S50), the controller 12 stops the chasing operation in step S60. In addition, after step S60, a chasing operation for keeping the hot water 21 of the bathtub 20 at the set temperature T * is executed.

  In step S <b> 70, the controller 12 determines whether the bather 40 has left the bathroom 200 based on the detection signal of the room entry sensor 33. Until the bather 40 is detected to leave the room (NO in S70), the processes after step S80 are not executed.

  When the leaving of bather 40 is detected (when YES is determined in S70), controller 12 performs a heat radiation operation for lowering the bath water temperature to initial temperature T # in step S80. After starting the heat radiation operation (S80), the controller 12 determines whether or not the bath water temperature has reached the initial temperature T # in step S90. In step S90, YES is determined when the bath water temperature reaches the initial temperature T #, and NO determination is maintained until then, and the heat radiation operation (S80) is performed.

  When bath water temperature reaches initial temperature T # (when YES is determined in S90), controller 12 stops the heat radiation operation in step S100. At this time, the second bather 40 may be notified that the bath water temperature has decreased to the initial temperature T #. After step S100, a chasing operation for keeping hot water 21 of bathtub 20 at initial temperature T # is executed.

  FIG. 5 is a flowchart for explaining in detail the heat radiation operation in steps S80 to S100 of FIG.

  Referring to FIG. 5, when controller 12 detects that the bather 40 has left the room (at the time of YES determination in S70), controller 12 operates pump 10 to supply hot water 21 of bathtub 20 to circulation path 8 in step S81. Circulate. The controller 12 proceeds to step S82 and stops the burner 2a. If the burner 2a is in a stopped state, the process of step S82 is skipped. The controller 12 further operates the fan 3a in step S83.

  When the hot water 21 circulating in the circulation path 8 is dissipated and the bath water temperature reaches the initial temperature T # (YES in S90), the controller 12 stops the pump 10 in step S101. Furthermore, the controller 12 stops the fan 3a by step S102. Thereby, the bath apparatus 300 stops the heat radiation operation.

  As described above, according to the bath apparatus according to the first embodiment, the bath water temperature is lowered to the initial temperature T # after the bather leaves the bathroom, so that the bath water temperature after the next bather takes a bath. Can be raised from the initial temperature T # to the set temperature T *. Therefore, the burden on the body due to a rapid temperature change that occurs during a series of actions up to bathing can be reduced and a comfortable feeling can be given to the next bather. As a result, it is possible to provide a bath apparatus that can improve comfort during bathing.

[Embodiment 2]
In the second and third embodiments, other configuration examples of the bath apparatus according to the present invention will be described.

FIG. 6 is a schematic diagram showing the configuration of the bath apparatus according to Embodiment 2 of the present invention.
Referring to FIG. 6, bath apparatus 310 according to Embodiment 2 is different from bath apparatus 300 according to Embodiment 1 shown in FIG. 1 in that heat source apparatus 110 is provided instead of heat source apparatus 100. Different. In the heat source device 110, a heating function is realized by supplying a heat medium to the heating terminal 112 via the input end 5b and the output end 6b. The heat medium is high-temperature water heated by the heat of combustion of the burner 2 in the heat exchanger 4.

  The heat source device 110 includes a housing 1, a burner 2, a fan 3, heat exchangers 4 and 18, pipes 5A, 6A, and 16A to 16C, a circulation path 8, a distribution valve 17, a temperature sensor 9, and a pump 10 (pumping pump) ), A pump 19 (heating pump), a water level sensor 11, a controller 12A, an electrical wiring 14, a switch 15, a remote controller 30, and a room entrance sensor 33.

  The input end 5b to which the heat medium flowing through the heating terminal 112 is input is connected to the input side of the heat exchanger 4 by the pipe 5A. The output side of the heat exchanger 4 is connected to the pipe 16A. The pipe 16A is connected to the pipe 6A and the pipe 16B via the distribution valve 17. The pipe 6A is connected to an output end 6b for outputting a heat medium to the heating terminal 112. The pipe 16B is connected to the input side of the primary path 18a of the heat exchanger 18. The output side of the primary side path 18a of the heat exchanger 18 is connected to the pipe 5A by the pipe 16C.

  The opening degree of the distribution valve 17 is controlled by the controller 12. The ratio of the flow rate of the path from the pipe 16A to the pipe 6A and the flow rate of the path from the pipe 16A to the pipe 16B can be controlled according to the opening degree of the distribution valve 17.

  The pipe 5 </ b> A, the heat exchanger 4, the pipe 16 </ b> A, the distribution valve 17, and the pipe 6 </ b> A form a heating circulation path for circulating the heat medium with the heating terminal 112. By supplying the heat medium to the heating terminal 112, the space (indoor) in which the heating terminal 112 is arranged can be heated.

  By introducing the heat medium into the pipe 16B by the distribution valve 17, a bypass path branched from the heating circulation path can be formed for the heat medium heated by the heat exchanger 4. The bypass path includes the pipe 16B, the primary path 18a of the heat exchanger 18, and the pipe 16C. The heat medium flowing through the bypass path passes through the heat exchanger 18 without passing through the heating terminal 112, and then joins the heating circulation path at the connection point 5B of the pipes 16C and 5A.

  The pump 19 (heating pump) is disposed downstream of the connection point 5B (on the heat exchanger 4 side) in the pipe 5A. Therefore, if the pump 19 is operated, the bypass path for allowing the heat medium to flow through the heat exchangers 4 and 18 can be formed even if the heating circulation path is not formed.

  The ratio of the supply flow rate to the heating circulation path and the supply flow rate to the bypass path can be controlled by the opening degree of the distribution valve 17 for the heat medium heated by the heat exchanger 4. Hereinafter, the ratio of the flow rate supplied to the bypass path with respect to the total flow rate of the heat medium output from the heat exchanger 4 is also referred to as a distribution ratio kd. The distribution ratio kd is controlled between kd = 0 (that is, the entire amount of the heat medium flows through the heating circulation path) and kd = 1.0 (that is, the entire amount of the heat medium flows through the bypass path). (0 ≦ kd ≦ 1.0). That is, the distribution valve 17 corresponds to an example of a “flow rate control mechanism”.

  Next, the structure connected with the secondary side path | route 18b of the heat exchanger 18 relevant to the memorial function of the bath apparatus 310 is demonstrated.

  The return pipe 8 a of the circulation path 8 is connected to the input side of the secondary side path 18 b of the heat exchanger 18. The forward piping 8 b of the circulation path 8 is connected to the output side of the secondary side path 18 b of the heat exchanger 18. In the heat exchanger 18, hot water 21 (low temperature water) flowing through the secondary side path 18b is heated by the amount of heat of the heat medium flowing through the primary side path 18a. As a result, high temperature water is output from the secondary side path 18b to the outgoing pipe 8b.

  The controller 12A controls signals for controlling the operation and stop of the pumps 10 and 19 and the opening degree of the distribution valve 17 in order for the heat source device 110 to operate according to a user instruction based on an input setting operation by the user or the like from the remote controller 30. A signal for controlling the amount of heat generated by the burner 2, and a signal for controlling the operation and stop of the fan 3. For example, the controller 12A can be configured to include a microcomputer and a memory.

  The controller 12 is electrically connected to the burner 2, fan 3, temperature sensor 9, pumps 10 and 19, water level sensor 11, distribution valve 17, electrical wiring 14, switch 15, and remote controller 30. The electrical wiring 14 is configured to supply power to the controller 12A by being connected to a power source (not shown).

Next, the operation of the bath apparatus 310 shown in FIG. 6 will be described.
First, the heating operation will be described. In the heating operation, the heat medium flowing through the heat exchanger 4 is heated by operating the burner 2 with the above-described heating circulation path formed by the operation of the pump 19. In the heating operation, the opening degree of the distribution valve 17 is controlled so that the distribution rate becomes 0 (kd = 0) so that the entire amount of the heat medium heated by the heat exchanger 4 forms a heating circulation path. .

  In the memorial operation, the hot water 21 of the bathtub 20 is automatically boiled up to the initial temperature T #, the boiled water 40 of the bathtub 20 is automatically boiled up to the set temperature T * after the bathing is detected, and the hot water 21 of the bathtub 20 is set to a constant temperature It is started by automatic boiling for keeping the temperature at T * or the initial temperature T #) or by boiling based on a memorial command from the user.

  In the memorial operation, the pump 19 is operated to allow the heat medium to flow through the bypass path. In the chasing operation, it is not necessary to supply the heating medium to the heating terminal 112. Therefore, the opening of the distribution valve 17 is set so that the entire amount of the heating medium heated by the heat exchanger 4 forms the chasing circulation path. The distribution rate is controlled to be 1.0 (kd = 1.0).

  Furthermore, the hot water 21 of the bathtub 20 circulates in the circulation path 8 by operating the pump 10. The circulating water introduced into the secondary side path 18b of the heat exchanger 18 is heated, so that the circulating water is raised to a predetermined temperature (initial temperature T # or set temperature T *) and then returned to the bathtub 20 again. Supplied.

  When heating and retreating are performed simultaneously, it is necessary to pass the heat medium through both the heating circulation path and the bypass path. Therefore, the opening degree of the distribution valve 17 is set to a predetermined ratio kd. Since 0 <kd <1.0, both the supply of the heat medium to the heating terminal 112 and the supply of the heat medium to the heat exchanger 18 are realized. By operating the pump 10, the hot water 21 in the bathtub 20 circulates in the circulation path 8 and is introduced into the secondary path 18 b of the heat exchanger 18. As the circulating water is heated by the heat quantity of the heat medium in the heat exchanger 18, the circulating water is raised to a predetermined temperature (initial temperature T # or set temperature T *) and then supplied to the bathtub 20 again.

  The heat radiation operation is started when the bather 40 leaving the bathroom 200 is detected. In the heat dissipation operation, the hot water 21 of the bathtub 20 circulates in the circulation path by operating the pump 10. In the heat exchanger 18, the amount of heat of the circulating water introduced into the secondary side path 18b is transmitted to the heat medium flowing through the primary side path 18a, whereby the hot water 21 dissipates heat. The circulating water is supplied again to the bathtub 20 after being lowered from the set temperature T * to the initial temperature T # based on the detection signal from the temperature sensor 9.

  Here, when the heat radiation operation is performed during the heating operation, in order to allow the heat medium to flow through both the heating circulation path and the bypass path, the opening of the distribution valve 17 has a distribution ratio of 0 <kd <1. .0 is set. On the other hand, in the case of transition from the memorial operation to the heat radiation operation, it is not necessary to continue supplying the heat medium to the heating circulation path, so that the distribution ratio of the opening of the distribution valve 17 is maintained at 1.0 ( kd = 1.0).

  Thereby, supply of the heat medium to the heat exchanger 18 is realized during the heat radiation operation. However, in order for the heat exchanger 18 to dissipate the circulating water, the heat medium flowing through the primary path 18a of the heat exchanger 18 needs to be at a lower temperature than the circulating water.

  Therefore, in the heat radiation operation, the controller 12A determines whether or not the hot water 21 tends to fall based on the gradient of the detection signal from the temperature sensor 9 from the time when the operation of the pump 10 is started. When the hot water 21 tends to fall in temperature, the controller 12A causes the heat exchanger 18 to radiate the hot water 21 because the heat medium flowing through the primary path 18a of the heat exchanger 18 is at a lower temperature than the hot water 21. Is determined to have been performed. Therefore, the operation of pump 10 is continued until hot water 21 reaches initial temperature T #.

  On the other hand, when the hot water 21 does not tend to decrease in temperature, the controller 12A determines that the heat medium flowing through the primary side path 18a of the heat exchanger 18 is higher or isothermal than the hot water 21. 18, it is determined that the hot water 21 is not radiated. In this case, the controller 12A puts the burner 2 in a stopped state, and lowers the temperature of the heat medium by operating the fan 3 and the pump 19 with the burner 2 stopped. The controller 12A further controls the opening degree of the distribution valve 17 so that the distribution ratio becomes 1.0 (kd = 1.0). That is, the supply of the heat medium to the heating circulation path is stopped.

  In this way, during the heat radiation operation, the entire amount of the heat medium radiated by the heat exchanger 4 flows through the bypass path and is introduced into the primary path 18 a of the heat exchanger 18. Therefore, since the radiated heat medium is not supplied to the heating terminal 112, the heating operation is temporarily stopped. However, it is possible to avoid the adverse effect that the heating function is lowered by supplying the cooled heat medium to the heating terminal 112 during the heat radiation operation.

  When the bath water temperature reaches the initial temperature T #, the controller 12A operates the burner 2 again, and controls the opening of the distribution valve 17 so that the distribution ratio becomes 0 (kd = 0). Thereby, the heating circulation path is formed again, and the heating operation is resumed.

  FIG. 7 is a flowchart for explaining the processing procedure of the chasing operation and the heat radiation operation in the bath apparatus 310 according to the second embodiment. The process shown in FIG. 7 can be repeatedly executed by the controller 12A.

  7 differs from FIG. 4 in the flowchart shown in FIG. 7 in that step S10 in FIG. 4 is replaced with steps S11 and S12. Since step S20 and subsequent steps are the same as those in the flowchart shown in FIG. 4, detailed description will not be repeated.

  Referring to FIG. 7, controller 12A determines whether or not bath apparatus 310 is in a memorial operation in step S11. If it is determined that the chasing operation is not being performed, step S11 is determined as NO, and the subsequent processing is not executed.

  If it is determined that bath device 310 is in the memorial operation (YES determination in S11), controller 12A causes bath water temperature to reach initial temperature T # based on the detection signal from temperature sensor 9 in step S12. It is determined whether it has been reached. In step S12, a YES determination is made when the bath water temperature reaches the initial temperature T #, and a NO determination is maintained until then, and a chasing operation (S11) is executed. When the bath water temperature reaches initial temperature T # (when YES is determined in S12), the same processes of steps S20 to S100 as in FIG. 4 are executed.

  FIG. 8 is a flowchart for explaining the processing procedure of the heat radiation operation in the bath apparatus 310 according to the second embodiment. The process shown in FIG. 8 can be executed by the controller 12A as the heat radiation operation in steps S80 to S100 in FIG.

  Referring to FIG. 8, when the controller 12A detects that the bather 40 has left the room (YES in S70), the controller 12A activates the pump 10 (remembrance pump) in step S84 to enter the circulation path 8. The hot water 21 of the bathtub 20 is circulated.

  The controller 12A proceeds to step S85, and determines whether or not the bathtub hot water temperature tends to fall based on the detection signal of the temperature sensor 9. For example, when the gradient of the bath water temperature after the time when the operation of the pump 10 is started is negative, the controller 12A determines that the bath water temperature has a tendency to decrease.

  When the bath water temperature tends to fall (when YES is determined in S85), the controller 12A proceeds to step S90 and determines whether or not the bath water temperature has reached the initial temperature T #. In step S90, a YES determination is made when the bath water temperature reaches the initial temperature T #, and the NO determination is maintained until then, and the heat radiation operation (S84) is executed. When bath water temperature reaches initial temperature T # (when YES is determined in S90), controller 12A stops pump 10 in step S106. Thereby, the bath apparatus 310 stops the heat radiation operation.

  On the other hand, when the bath water temperature does not tend to fall (NO in S85), the controller 12A stops the burner 2 in step S86. If the burner 2 is in a stopped state, the process of step S86 is skipped. The controller 12A further operates the fan 3 in step S87 and operates the pump 19 (heating pump) in step S88.

  The controller 12A further proceeds to step S89 to control the opening degree of the distribution valve 17 so that the distribution ratio kd = 1.0. That is, the opening degree of the distribution valve 17 is controlled so that the entire amount of the heat medium flows through the bypass path. As the heat medium flowing through the bypass path cools down, the hot water 21 introduced into the secondary path 18b of the heat exchanger 18 dissipates heat.

  When bath water temperature reaches initial temperature T # (when YES is determined in S90), controller 12A operates burner 2 in step S104. In step S105, the controller 12A further controls the opening of the distribution valve 17 so that the distribution ratio kd = 0. That is, the opening degree of the distribution valve 17 is controlled so that the entire amount of the heat medium flows through the heating circulation path. The controller 12A stops the pump 10 (remembrance pump) in step S106. Thereby, the bath apparatus 310 stops the heat radiation operation.

  Thus, in the bath apparatus according to the second embodiment, similarly to the bath apparatus according to the first embodiment, the bath water temperature is lowered to the initial temperature T # after the bather leaves the bathroom. After the next bather takes a bath, the bath water temperature can be raised to the set temperature T *. Therefore, the burden on the body due to a rapid temperature change that occurs during a series of actions up to bathing can be reduced and a comfortable feeling can be given to the next bather. As a result, it is possible to provide a bath apparatus that can improve comfort during bathing.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 housing, 1a exhaust port, 2, 2a, 2b burner, 3, 3a, 3b fan, 4, 4a, 4b, 18 heat exchanger, 5 water supply piping, 5A, 6A, 16A-16C piping, 5B connection point, 5a Water inlet, 5b Input end, 6 Hot water supply piping, 6a Hot water outlet, 6b Output end, 7 Mixing valve, 8 Circulation path, 8a Return piping, 8b Outward piping, 8c Junction point, 9 Temperature sensor, 10, 19 Pump Water level sensor, 12, 12A controller, 13 Two-way valve, 14 Electrical wiring, 15 Switch, 17 Distribution valve, 18a Primary side path, 18b Secondary side path, 20 Bathtub, 21 Hot water, 30 Remote control, 31 Display unit, 32 Operation 33, entrance sensor, 40 bather, 100, 110 heat source machine, 112 heating terminal, 120 entrance determination unit, 122 water level determination unit, 124 temperature determination unit, 1 6 control unit, 300 and 310 bath apparatus, T♯ initial temperature, T * set temperature.

Claims (6)

A bath device connected to a bathtub installed in the bathroom,
A circulation path for circulating hot water in the bathtub in a state connected to the bathtub;
A heat transfer section for adjusting the temperature of the hot water circulating in the circulation path by heat exchange with the heat medium;
A pump connected to the circulation path for circulating the hot water between the bathtub and the heat transfer section;
An entrance sensor for detecting entry and exit of a bather into the bathroom;
A bath sensor for detecting bathing of the bather into the bathtub;
A temperature sensor for detecting the temperature of the hot water in the bathtub;
A controller for controlling the heat transfer unit and the pump, based on detection signals of the room entrance sensor, the bath sensor, and the temperature sensor;
In the bath apparatus, a pouring operation to the bathtub is performed at an initial temperature lower than a set temperature,
The controller is
When the bathing sensor detects that the bather has bathed, the heat transfer section and the pump are controlled so as to raise the temperature of the hot water in the bathtub to the set temperature,
When the bathing sensor detects that the bather has left the bathroom, the hot water is lowered to a temperature lower than the set temperature by heat exchange with the heat medium. A bath apparatus for controlling the heat transfer section and the pump. The controller is
Controlling the heat transfer section and the pump such that the temperature of the hot water when the bathing sensor detects that the bather has entered the bathroom is the initial temperature;
The heat transfer section and the pump are controlled so as to lower the temperature of the hot water to the initial temperature when the entrance sensor detects that the bather has left the bathroom. The bath apparatus as described.   The controller raises the temperature of the hot water from the initial temperature to the set temperature when the bathing sensor detects that the bather has taken a bath after lowering the temperature of the hot water to the initial temperature. The bath apparatus according to claim 2, wherein the heat transfer unit and the pump are controlled so as to perform the operation.   4. The information processing apparatus according to claim 2, further comprising: a notification unit for notifying that the temperature of the hot water has decreased to the initial temperature after the bathing sensor detects that the bather has left the bathroom. The bath apparatus as described. The heat transfer section is
A combustion section for burning fuel to generate combustion gas;
A fan for supplying air to the combustion section;
A heat exchanger that exchanges heat between the combustion gas and the hot water in the bathtub,
The circuit is
A return pipe connected to the input end of the heat exchanger;
And an outgoing pipe connected to the output end of the heat exchanger,
The said control part operates the said fan and the said pump, while putting the said combustion part into a stop state, when the said entrance sensor detects that the said bather left the said bathroom. The bath apparatus of any one of 1-4. The heat transfer unit is configured to perform a heating operation for heating a heat medium supplied to an external heating terminal,
The heat transfer section is
A heating mechanism for heating the heat medium;
A heating circulation path for circulating the heat medium heated by the heating mechanism with the heating terminal during the heating operation;
A heat exchanger having a primary side path and a secondary side path for heat exchange between liquids;
A bypass path that is branched from the heating circulation path and is configured such that the heat medium passes through the primary side path of the heat exchanger without passing through the heating terminal and then joins the heating circulation path again. When,
A flow rate control mechanism for controlling a distribution ratio that is a ratio of a flow rate of the heat medium supplied to the bypass path with respect to a total flow rate of the heat medium heated by the heating mechanism;
The circuit is
A return pipe connected to the input side of the secondary side path;
An outgoing pipe connected to the output side of the secondary path,
The heating mechanism is
A combustion section for combusting the fuel to generate combustion gas;
A fan for supplying air to the combustion unit,
When the entrance sensor detects that the bather has left the bathroom, the control unit activates the pump and the fan, stops the combustion unit, and the distribution rate. The bath apparatus according to any one of claims 1 to 4, wherein the flow rate control mechanism is controlled so that the total amount of the heat medium is set to a value supplied to the bypass path.

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