JP4931577B2 - Bath equipment - Google Patents

Description

  The present invention relates to a bath apparatus having a fine bubble generating function for generating fine bubbles (white turbidity) in a bathtub.

  For example, a bubble generating device that generates bubbles in a bathtub is provided, and bubbles are discharged into hot water in a bathtub. In particular, by discharging very fine bubbles from the bubble generating device, cloudiness is generated in the bathtub. There is an increasing demand for devices that generate microbubbles of the formula (appearing cloudy due to a large amount of microbubbles). It is said that the generation of fine bubbles (white turbidity) in the bathtub has the effect of improving the heat retention of the bather and making it easier to remove dirt.

  As a device for generating fine bubbles in a bathtub or the like, conventionally, a bubble generating device having a hot water circulation path with a gas-liquid mixing tank is attached to the bathtub or the like, and this bubble generating device is operated alone when bubbles are generated. There have been proposed ones (see, for example, Patent Documents 1 and 2) and a configuration in which a bubble generating device is incorporated on the heat source unit side.

Japanese Patent No. 3680670 Japanese Patent Laid-Open No. 2001-179241

  However, since the bubble generating device of the type that operates alone has to be connected to the bubble generating device by providing a dedicated pipe line, assuming that the cost is high and the bubble generating device is not used, There was a problem that water draining became complicated. On the other hand, when the bubble generating device is incorporated on the heat source device side, there is a possibility that the initial cost is likely to be high, and there is a problem that the cost is further increased because development is required for each model.

  The present invention has been made in order to solve the above-mentioned problems, and the object thereof can be easily configured by using various heat source devices such as an existing or new heat source device. It is an object of the present invention to provide a bath apparatus capable of appropriately generating and repelling a formula.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, according to the first aspect of the present invention, an outward pipe connecting the reheating heat exchanger and the bathtub is connected to one end side of the reheating heat exchanger performing reheating of the bathtub hot water, A discharge port side of the bath pump is connected to the end side via a connection path, and a return pipe connecting the bath pump and the bathtub is connected to the suction port side of the bath pump, and the return A bypass path that connects the pipe and the outgoing pipe, and one end side is connected to the outgoing pipe and the other end side is connected to the return pipe so that air is passed through the hot water for generating fine bubbles during operation in the fine bubble generation mode. An air melting unit for pressure melting, and one end side of the air melting unit is connected closer to the reheating heat exchanger than the bypass path connection portion of the outgoing pipe, and the other end of the air melting unit Side is the bypass path connection part of the return pipe A recirculation circuit that is connected to the tub side and recirculates the tub hot water through the return pipe, the bath pump, the connection path, the reheating heat exchanger, and the forward line in order to return to the bathtub. Path switching means for switching between a path and a circulation path for generating fine bubbles is provided, and the circulation path for generating fine bubbles passes the bathtub hot water through the forward pipe to the bypass path, and from the bypass path to the return pipe. The bath pump, the connection path, the reheating heat exchanger, and the forward pipe are sequentially passed through the forward pipe and introduced into the air melting unit to create an overpressure molten hot water of the air. And a path through which hot water in which the air is over-pressure melted is returned to the bathtub through the return pipe. A path is switched from a ring path to the circulation path for generating fine bubbles, and a path from the circulation path for generating fine bubbles to the recirculation circulation path is received by the path switching means in response to an operation off command in the fine bubble generation mode. A configuration in which path switching control means for performing switching is provided serves as means for solving the problem.

  In addition to the configuration of the first invention, the second invention includes a hot water tank for storing hot water introduced into the air melting unit, an air pump for introducing air into the hot water tank, A pressure pump that pressurizes and melts the air introduced by the air pump into the hot water in the hot water tank, and drives the air pump to introduce air into the hot water tank when operating in the fine bubble generation mode. Air introduction operation, bath hot water jet introduction that drives the pressurization pump and bath pump to circulate hot water in the bathtub through the circulation path for generating fine bubbles and jets it from the outgoing pipe into the hot water storage tank of the air melting unit It is characterized by having an air melting operation control unit for over-pressure melting the hot and cold water by alternately repeating the operation.

  Furthermore, in addition to the configuration of the second invention, the third invention is provided with a pouring path for introducing hot water from the hot water outlet side of the hot water supply heat exchanger to the outgoing pipe, and the air melting operation control unit includes fine bubbles. After performing an air introduction operation in response to an operation-on command in the generation mode, hot water is sent from the hot water supply heat exchanger side to the outgoing pipe via the pouring path, and the hot water storage tank of the air melting unit is supplied from the outgoing pipe side. Injecting and introducing hot water into the hot water, the air is over-pressure melted into the hot water, and then the air introduction operation and the bathtub hot water jet introduction operation are alternately repeated. It is characterized by that.

  Furthermore, in the fourth aspect of the present invention, in addition to the configuration of the second or third aspect of the present invention, a pouring path for leading hot water from the hot water outlet side of the hot water heat exchanger to the outgoing pipe is formed. In response to the command to turn off the fine bubble generation mode, the operation of derivation of the overpressure molten air in the hot water tank of the air melting unit to the bathtub side through the return pipe of the hot water used to circulate the hot water and the hot water supply heat In parallel with the operation of feeding hot water from the exchanger side to the outgoing pipe via the pouring path and introducing new hot water into the hot water tank from which the hot water has been led out by the derivation operation from the outgoing pipe side. Alternatively, a new hot water introduction operation is performed after the operation of deriving the hot water to the bathtub side.

  Furthermore, in the fifth invention, in addition to the configuration of any one of the first to fourth inventions, the bathtub is provided with a circulation connector connected to the return pipe and the forward pipe, The circulation connector has a case provided inside the inner wall of the bathtub, and the case is provided with a hot water outlet for discharging hot water into the bathtub and a hot water inlet for sucking in the bathtub hot water. A bath hot water inlet chamber sucked from the hot water inlet is formed, and a return pipe communication passage is provided for communicating the bath hot water introduction chamber and the return pipe. The return pipe communication passage and the bath hot water are provided. A first check valve body is interposed in the communication portion with the introduction chamber, and an outgoing pipe communication passage that connects the bathtub hot water introduction chamber and the outgoing pipe is provided, and the outgoing pipe communication passage and the bathtub are provided. A second check valve body is interposed in the communication part with the hot water introduction chamber, and the outgoing pipe communication is provided. Is communicated with the hot water discharge port via a third check valve body, and the return pipe communication passage is connected to a hot water discharge nozzle for discharging hot water containing overpressure molten air into the case. A fine bubble generating section that communicates through the valve body and generates turbid fine bubbles by causing cavitation in the hot water discharged from the hot water discharge nozzle is provided in the case, and is generated from the fine bubble generating section. A fine bubble discharge port for discharging white turbid fine bubbles to the bathtub is formed in the case, and the first check valve is closed with the second check valve body closed when operating in the follow-up mode. The body opens, and the bathtub hot water sucked from the hot water inlet of the case is introduced into the return pipe through the bathtub hot water introduction chamber and the return pipe communication passage, and passes through the recirculation circulation path. Return to the bathtub hot water Through the passage, the third check valve body is opened and discharged from the hot water discharge port of the case, and when operating in the fine bubble generation mode, the first check valve body is closed and the first check valve body is closed. The check valve body of 2 is opened, and the bathtub hot water sucked from the hot water inlet of the case is introduced into the outgoing pipe through the bathtub hot water introduction chamber and the outgoing pipe communication passage, and the air melting unit Hot water sent from the return pipe to the bathtub side through the fine bubble generating circulation path in a state where the air is melted at an overpressure passes through the return pipe communication passage, and the fourth check valve body is opened to open the hot water. It is led to a discharge nozzle, and the hot water is discharged from the hot water discharge nozzle, and fine bubbles are generated by the fine bubble generator, and discharged from the fine bubble discharge port of the case. .

  According to the present invention, a forward path and a return pipe connected to a reheating heat exchanger that performs reheating of a bathtub, a bypass path that connects the forward pipe and the return pipe, and a fine bubble when operating in the fine bubble generation mode A recirculation circuit that connects an air melting unit that overmelts air to the hot water for generation, passes the hot water from the return pipe to the reheating heat exchanger, and then returns to the bathtub through the forward pipe for circulation. The path is switched between a path and a circulation path for generating fine bubbles that returns the bathtub hot water from the forward pipe side through the bypass path and the reheating heat exchanger through the air melting unit and then returns to the bathtub through the return pipe. By providing route switching means and controlling this route switching means, the hot water route is appropriately switched during the reheating mode operation and the fine bubble generation mode operation, It can be carried out accurately and fine bubble generation.

  In other words, during the reheating mode operation, the bath water can be circulated through the recirculation circulation path to perform an accurate reheating operation, and during the fine bubble generation mode operation, the path switching control means In response to the bubble generation mode operation on command, the path switching means switches the recirculation circulation path to the fine bubble generation circulation path, and receives the micro bubble generation mode operation off command to switch the path. By switching the path from the fine bubble generating circulation path to the recirculation circulation path by means, the fine bubbles are accurately generated in the bathtub by the molten water returned to the bathtub through the fine bubble generating circulation path. Can be made. In the present application, unless otherwise specified, fine bubbles mean cloudy fine bubbles.

  As described above, the present invention can accurately perform the reheating of the bathtub hot water and the generation of fine bubbles in the bathtub, but the air melting unit for forming the overpressure air molten hot water for generating fine bubbles is provided on the heat source machine side. It is not provided, and is not provided in a dedicated conduit connected to the bathtub, but is connected to the return pipe and the outgoing pipe for bathing, It is possible to provide a bath apparatus that can be easily configured using various heat source machines such as an existing heat source machine and does not cause an increase in cost.

  In the present invention, the air melting unit includes a hot water tank for storing hot water introduced into the air melting unit, an air pump for introducing air into the hot water tank, and air introduced by the air pump in the hot water tank. An air introduction operation for driving the air pump to introduce air into the hot water storage tank, and a pressure pump and a bath pump. According to the configuration in which the hot water in the bathtub is circulated through the circulation path for generating fine bubbles and the hot water jetting introduction operation of jetting into the hot water storage tank of the air melting unit from the outgoing pipe is alternately repeated, By repeating the operation, it is possible to efficiently over-pressure melt the air in the bathtub hot water.

  In addition, in order to generate fine bubbles (white turbidity type), it is necessary to pressurize the circulating hot water, and for this purpose, a pressurizing pump is used. According to this configuration, the bath hot water circulation through the circulation path for generating fine bubbles is performed. Sometimes, the pressure pump and the bath pump are driven together, so by utilizing the capacity of the bath pump, a large capacity pressurizing pump becomes unnecessary, and even if a low-priced pressurizing pump is applied, it circulates. Air can be melted at high pressure in hot water.

  Further, in the present invention, the air melting operation control unit performs an air introduction operation in response to an operation on command in the fine bubble generation mode, and then sends hot water from the hot water supply heat exchanger side to the outgoing pipe. The hot water is injected and introduced into the hot water tank of the air melting unit from the hot melt water to overpressure and melt the air into the hot water, and then the air introduction operation and the bathtub hot water jet introduction operation are performed. When the microbubble generation mode is started, the air overpressure is more efficiently achieved by melting the air into the hot water from the hot water supply heat exchanger side, which contains more air than the hot water in the bathtub. Molten hot water can be formed and sent to the bathtub side.

  Furthermore, in the present invention, the air melting operation control unit receives the operation off command in the fine bubble generation mode, and returns to the bathtub side through the hot water return pipe used for circulating the hot water of the overpressure molten air in the hot water tank. In parallel, or an operation of feeding hot water from the hot water supply heat exchanger side into the outgoing pipe and introducing new hot water into the hot water tank of the air melting unit from the outgoing pipe side. In the case where new hot water introduction operation is performed after the outlet operation to the side, at the end of the operation in the fine bubble generation mode, the hot water used for circulation in the hot water tank of the air melting unit and the new hot water are circulated. Thus, the hot water in the hot water storage tank can be made into new hot water.

  Therefore, for example, the hot water in the hot water tank of the air melting unit can be prevented from being left for a long time as the bathtub hot water, thereby preventing problems such as the propagation of various bacteria contained in the bathtub hot water. .

  Further, in the present invention, the bathtub is provided with a circulation connector having a case provided on the inner side of the inner wall of the bathtub and connected to the return pipe and the outgoing pipe. And a suction port, an introduction chamber, a return pipe communication passage, an outgoing pipe communication passage, a hot water discharge nozzle, a fine bubble generating portion, and first to fourth check valve bodies. In the reheating mode operation and in the fine bubble generation mode operation, the corresponding check valve body is opened and closed, and hot water is introduced and led out through the return pipe communication path and the outgoing pipe communication path. The hot water circulation through the recirculation path during the mode operation and the hot water circulation through the fine bubble generation circulation path and the precise micro bubble generation operation during the fine bubble generation mode. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 schematically shows a system configuration diagram of an embodiment of a bath apparatus according to the present invention. As shown in the figure, a combustion chamber 50 (50a, 50b) is provided in the instrument case 40, a hot water supply burner 10 is provided in the combustion chamber 50a, and hot water in the bathtub 26 is replenished in the combustion chamber 50b. Each additional burner 16 is arranged.

  These hot water supply burner 10 and reheating burner 16 are connected to gas pipes 9 and 17 for supplying fuel to the respective burners 10 and 16, and these gas pipes 9 and 17 are connected to the burners 10 and 16. An on-off valve (not shown) is provided for controlling fuel supply / stop. The gas pipe 9 is provided with a proportional valve (not shown) capable of controlling the amount of fuel supplied to the hot water supply burner 10 with the valve opening.

  Below the hot water supply burner 10 and the reheating burner 16, combustion fans 12 and 13 for supplying and exhausting combustion of the respective burners 10 and 7 are provided. Air sucked from the outside through a mouth (not shown) is sent to the hot water supply burner 10 and the reheating burner 16, respectively. The combustion of the hot water supply burner 10 and the reheating burner 16 is performed by the air sent from the combustion fans 12 and 13 and the gas supplied through the gas pipes 9 and 17, and the combustion gas generated by the burner combustion is burned. The air is exhausted from the exhaust port 11 through the chamber 50.

  A hot water supply heat exchanger 7 is provided on the upper side of the hot water supply burner 10. A water supply pipe 46 for guiding water from a water supply source is connected to the inlet side (water inlet side) of the hot water supply heat exchanger 7, and the water supply pipe 46 is connected from the water supply pipe 46 to the hot water supply heat exchanger 7 side. A flow rate sensor 43 that detects the flow rate of the flowing water and a water thermistor (not shown) that detects the temperature of the water flowing into the hot water heat exchanger 7 are provided. A hot water supply pipe 47 is connected to the outlet side of the hot water supply heat exchanger 7, and the hot water supply pipe 47 is provided with a hot water thermistor (not shown) that can detect the temperature of the hot water flowing out.

  The present embodiment has a function of supplying hot water heated by the hot water supply heat exchanger 7 and supplying hot water to one or more hot water supply destinations from the hot water supply pipe 47, but this hot water supply operation is a well-known operation. Detailed description thereof will be omitted.

  On the upper side of the reheating burner 16, a reheating heat exchanger 15 for reheating the bath water is provided. One end side of the reheating heat exchanger 15 is connected to an outgoing pipe 24 that connects the reheating heat exchanger 15 and the bathtub 26, and the other end side of the reheating heat exchanger 15 is connected via a connection path 19. The discharge port side of the bath pump (self-contained pump, fugal pump) 21 is connected, and the return pipe 23 connecting the bath pump 21 and the bathtub 26 is connected to the suction port side of the bath pump 21 Has been. The bathtub 26 is provided with a circulation connector 1 connected to the return pipe 23 and the outgoing pipe 24.

  In addition, the hot water supply pipe 47 is connected to the return pipe 23 via the pouring passage 14, and hot water is supplied in the state where the pouring electromagnetic valve 18 provided in the pouring passage 14 is opened. From the hot water supply side of the hot water supply heat exchanger 7, a pouring path is formed through the return pipe 23, the bath pump 21, and the reheating heat exchanger 16 in order to lead to the outgoing pipe 24. In this embodiment, the pouring passage 14 is connected to the return pipe 23, but the pouring passage 14 may be connected to the connection path 19 or may be connected to the outgoing pipe 24.

  The connection path 19 includes a running water switch 22 that is turned on when it is detected that water has flowed into the connection path 19 through the return pipe 23, and a bath temperature sensor (not shown) that detects the temperature of the bath water. The return pipe 23 is provided with a water level sensor 20 for detecting the water level of the bathtub 26.

  In the bath apparatus of the present embodiment, the hot water filling operation to the bathtub 26 is performed by pouring hot water heated by the hot water supply heat exchanger 7 from the outgoing pipe 24 to the bathtub 26 through the pouring path, This pouring is performed by pouring from the outgoing pipe 24 to the bathtub 26 until the bathtub water level detected by the water level sensor 20 reaches the set water level. Since the hot water filling operation is well known, detailed description thereof is omitted.

  Moreover, the bath apparatus of this embodiment has the following characteristic configuration. In other words, the present embodiment has a function of discharging fine bubbles (white turbidity type) into the bathtub 26, and during operation in this fine bubble generation mode, air is over-pressure melted into hot water for generating fine bubbles. An air melting unit 6 is connected to the return pipe 23 and the forward pipe 24. In addition, a bypass passage 5 is provided to connect the return pipe 23 and the outgoing pipe 24, and the hot water obtained by overpressure melting the air by the air melting unit 6 is guided to the bathtub 26 to generate white turbid fine bubbles. And the operation of recirculating and circulating the bathtub hot water are switched as necessary.

  The air melting unit 6 is provided with one end side 55 connected to the outgoing pipe 24 and the other end side 56 connected to the return pipe 23, and one end side of the air melting unit 6 is connected to the bypass path 5 of the outgoing pipe 24. The other end side of the air melting unit 6 is connected closer to the bathtub 26 than the connection part 58 of the return pipe 23 to the bypass path 5. The bypass passage 5 is provided with a check valve 52 having a forward direction from the connecting portion 57 side to the connecting portion 58 side.

  The air melting unit 6 includes a hot water tank 2 for storing hot water introduced into the air melting unit 6, an air pump 3 for introducing air into the hot water tank 2, and air introduced by the air pump 3 in the hot water tank. And a pressurizing pump 44 for pressurizing and melting the hot water. The pressurizing pump 44 is connected to the forward pipe 24 via a pipe line 60, connected to the hot water storage tank 2 via a pipe line 61, and the hot water tank 2 is connected to the return pipe 23 via a pipe line 62. Yes. The air pump 3 and the hot water storage tank 2 are connected via a pipe line 53, and a check valve 51 having a forward direction from the air pump 3 side toward the hot water tank 2 side is interposed in the pipe line 53.

  A three-way valve 8 is provided at a connection portion between the outgoing pipe 24 and the bypass passage 5, and a three-way valve 9 is provided at a connection portion between the return pipe 23 and the air melting unit 6. These three-way valves 8 and 9 function as path switching means for switching between the recirculation circulation path and the fine bubble generation circulation path, and are signal-connected to the path switching control means 28.

  The recirculation circulation path is configured such that the bath water is the return pipe 23, the bath pump 21, the connection path 19, the reheating heat exchanger 16, and the hot water as indicated by a solid arrow B in FIG. This is a path that passes through the outgoing pipe 24 in order and returns to the bathtub 26 for circulation. When the bath pump 21 is driven when the three-way valves 8 and 9 are in the state shown in FIG. 3B by the control of the path switching control means 28, the bath water circulates through the recirculation circulation path. To do.

  Further, the circulation path for generating fine bubbles passes the hot water from the bathtub through the forward pipe 24 to the bypass path 5 as shown by the broken line arrow A in FIG. , The bath pump 21, the connection path 19, the reheating heat exchanger 16, and the outgoing pipe 24 in order, and are introduced into the air melting unit 6 from the outgoing pipe 24 to overpressure molten hot water of air. The hot water in which the air is melted at an overpressure from the air melting unit 6 is passed through the return pipe 23 and returned to the bathtub 26. That is, in this path, the two pumps of the bath pump 21 and the pressure pump 44 are provided in series. When the bath pump 21 and the pressure pump 44 are driven when the three-way valves 8 and 9 are in the state shown in FIG. It circulates through the generation circulation path.

  FIG. 2 shows a control configuration for generating cloudy fine bubbles. This control configuration includes a fine bubble generation switch 36 and a fine bubble generation control means 40. The fine bubble generation control unit 40 includes a path switching control unit 28, an additional hot water operation control unit 38, and an air melting operation control unit 30.

  For example, as shown in FIG. 4, the fine bubble generation switch 36 is provided in a remote control 48 or the like, and is a switch that is turned on and off by operating when a user wants to generate fine bubbles (white turbidity) in the bathtub 26. It is. For example, when the fine bubble generation switch 36 is pressed once, the switch is turned on, and when pressed again, the switch is turned off. The operation method of the fine bubble generation switch 36 is not particularly limited, and is set as appropriate.

  When the fine bubble generation switch 36 is turned on, an operation on command for the fine bubble generation mode is applied to the path switching control means 28, the added hot water operation control means 38, and the air melting operation control section 30, respectively. When the fine bubble generation switch 36 is turned off, an operation off command in the fine bubble generation mode is applied to the path switching control means 28, the added hot water operation control means 38, and the air melting operation control section 30, respectively.

  The path switching control means 28 receives the operation on command for the fine bubble generation mode, and switches the recirculation circulation path to the fine bubble generation circulation path by switching the three-way valves 8 and 9, In response to an operation-off command in the fine bubble generation mode, the three-way valves 8 and 9 are switched to switch the route from the fine bubble generation circulation route to the follow-up circulation route.

  For example, the path switching control unit 28 receives an operation-on command for the fine bubble generation mode and satisfies a predetermined path switching condition for generating fine bubbles (for example, when no reheating is performed). 3), the three-way valves 8 and 9 are switched from the state shown in FIG. 3B to the state shown in FIG. 3A, thereby switching the path from the recirculation circulation path to the fine bubble generation circulation path. Then, when this path switching is performed, a path switching completed signal for generating fine bubbles is added to the added hot water operation control means 38 and the air melting operation control unit 30.

  Note that when the condition for switching the path for generating fine bubbles is not satisfied, for example, during chasing, the user waits until the condition is met or prompts the user to stop chasing. Thus, an appropriate operation program is provided in advance so that the condition is satisfied early.

  Further, the path switching control means 28 receives the microbubble generation mode operation off command and, for example, when a predetermined path switching condition after the end of microbubble generation is satisfied (for example, the microbubble generation mode operation is performed). When the three-way valves 8 and 9 are switched from the state shown in FIG. 3 (a) to the state shown in FIG. 3 (b) when stopped, the route from the fine bubble generating circulation route to the recirculation circulation route Switch.

  The air melting operation control unit 30 receives the signal for switching the path for generating fine bubbles added from the path switching control means 28, and then first turns the air pump 3 on for a predetermined time (for example, 5 seconds), or Air introduction for detecting the boundary between the air layer and the liquid layer in the hot water tank 2 (water level detection) and driving until the detection level reaches a predetermined set level to introduce air into the hot water tank 2 Perform the action. Thereafter, the air melting operation control unit 30 adds an additional hot water operation start command to the additional hot water operation control means 38.

  In response to the addition hot water operation start (ON) command, the addition hot water operation control means 38 sends hot water from the hot water supply heat exchanger 7 side to the outgoing pipe 24 through the pouring path, and air is supplied from the outgoing pipe 24 side. An operation for injecting hot water to inject hot water into the hot water storage tank 2 of the melting unit 6 is performed. Then, the air introduced into the hot water tank 2 by the air introduction operation of the air melting operation control unit 30 is over-pressure melted into the pouring hot water introduced by the injection introducing operation of the pouring hot water.

  The air melting operation control unit 30 adds the hot water operation control means 38 to the additional hot water operation control means 38 when a predetermined pouring time (for example, 2 minutes) has elapsed since the addition hot water operation start command has been added. An additional hot water operation stop (off) command is added, and the additional hot water operation by the additional hot water operation control means 38 is stopped. Then, after the addition hot water operation is stopped, the air introduction operation is performed for 15 seconds, for example.

  Further, the air melting operation control unit 30 drives the bath pump 21 and the pressurizing pump 44 to circulate hot water in the bathtub 26 through the circulation path for generating fine bubbles, and from the outgoing pipe 24 to the air melting unit. The bathtub hot water jet introduction operation which injects and introduces into the hot water storage tank 2 of 6 is performed, and the air introduced into the hot water storage tank 2 by the air introduction operation is overpressure-melted into the bathtub hot water. The bath pump 21 and the pressure pump 44 are driven for a bath pump drive set time of, for example, 2 minutes. Then, the air melting operation control unit 30 performs the air introduction operation again, and alternately repeats the air introduction operation and the bathtub hot water jet introduction operation.

  In addition, when the air melting operation control unit 30 receives the operation-off command in the fine bubble generation mode, the driving of the air pump 3, the bath pump 21 and the pressure pump 44 is stopped, and the hot water storage tank 2 of the air melting unit 6 is stopped. The hot water used for circulating the hot water of the overpressure molten air is led out to the bathtub 26 side through the return pipe 23. Further, after this operation, the air melting operation control unit 30 adds an additional hot water operation ON signal to the additional hot water operation control means 38, and supplies the hot water from the hot water supply heat exchanger 7 side through the hot water pouring path to the outgoing pipe. 24, the hot water is introduced into the hot water storage tank 2 from which the hot water has been led out by the derivation operation. In addition, you may make it the air melting operation control part 30 perform the derivation | leading-out operation | movement to the bathtub 26 side of hot water, and the introduction operation | movement of new hot water in parallel.

  When the addition hot water operation is finished, this operation end signal is applied to the route switching control means 28, and the route switching control means 28 switches the three-way valves 8 and 9 so that the recirculation circulation from the circulation path for generating fine bubbles. Switch the route to the route.

  In the present embodiment, fine bubbles are generated from the circulation connector 1 by the operation of the fine bubble generation mode by the above control configuration. In FIG. 5, the structure of the circulation connector 1 is shown by a schematic cross-sectional view, and its operation is shown by the schematic cross-sectional views in FIGS. 6 (a) and 6 (b). FIG. 7 shows the circulation connector 1 in a disassembled state in a schematic perspective view.

  As shown in these drawings, the circulation connector 1 has a resin case 31 provided inside the inner wall of the bathtub, and the case 31 has a hot water outlet 32 for discharging hot water to the bathtub 26, and A hot water inlet 33 for sucking bathtub hot water and a fine bubble outlet 34 for discharging fine bubbles to the bathtub 26 are provided.

  As shown in FIG. 7, the case 31 includes a metal cover 81, a partition cover 82, and a partition main body 83. These are integrated by, for example, high-frequency welding or the like, fixed to the fixture 85 with a screw 89, and fixed to the bathtub 26 by inserting and fixing the fixture 85 into a hole formed in the bathtub wall 26a (see FIG. 6). Has been. A metal packing 86 is interposed between the flange 88 of the fixture 85 and the inside of the bathtub wall 26a. A metal fitting body 84 provided outside the bathtub 26 is fitted and fixed to the outer peripheral side of the fixture 85, and a metal fitting packing 87 is interposed between the metal fitting body 84 and the outside of the bathtub wall 26a. Yes.

  As shown in FIGS. 5 and 6, a bathtub hot water inlet chamber 35 sucked from the hot water inlet 32 is formed in the case 31, and the bathtub hot water inlet chamber 35, the return pipe 23, Is provided with a return pipe communication passage 41. A first check valve body 71 having a forward direction from the introduction chamber 35 side to the return pipe communication passage 41 side is provided at a communication portion between the return pipe communication passage 41 and the bathtub hot water introduction chamber 35. It is installed. In addition, an outgoing pipe communication passage 42 that connects the bathtub hot water introduction chamber 35 and the outgoing pipe 24 is provided, and a communication portion between the outgoing pipe communication passage 42 and the bathtub hot water introduction chamber 35 includes: A second check valve body 72 having a forward direction from the introduction chamber 35 side toward the outgoing pipe communication passage 42 side is interposed.

  The outgoing pipe communication passage 42 communicates with the hot water discharge port 32 via a third check valve body 73 whose forward direction is the direction from the outgoing pipe communication passage 42 side to the hot water discharge port 32 side. Further, the return pipe communication passage 41 communicates with a hot water discharge nozzle 75 for discharging hot water containing overpressure molten air into the case via a fourth check valve body 74. The fourth check valve body 74 is provided in a communication portion between the hot water discharge nozzle 75 and the return pipe communication passage 41, and the direction from the return pipe communication passage 41 side toward the hot water discharge nozzle 75 is a forward direction. .

  The first to fourth check valve bodies 71 to 74 are each made of a synthetic rubber and formed in a rectangular plate shape. As shown in FIG. 5, the first and fourth check valve bodies 71 and 74 are The proximal end sides 71a and 74a are fixed to one wall surface of the return pipe communication passage 41, and the distal end sides 71b and 74b are locked to the corresponding locking portions 95 and 98, respectively, in a state where there is no flow of hot water, It is formed so as to close the hot water flow path. Further, the base end sides 72a and 74a of the second and third check valve bodies 72 and 73 are fixed to one wall surface of the outgoing pipe communication passage 42, and the distal end sides 72b and 73b are in a state where there is no flow of hot water. Are respectively engaged with the corresponding locking portions 96 and 97 so as to close the hot water flow path.

  The base end side 73a of the third check valve body 73 is located on the upstream side of the tip end side 73b with respect to the flow from the outgoing pipe communication passage 42 side to the hot water discharge port 32 side. The fourth check valve body 74 has a proximal end side 74a upstream of the distal end side 74b with respect to the flow from the return pipe communication passage 41 side to the fine bubble discharge port 34 side. It is located in the inclined posture with respect to the flow path of hot water. Moreover, the front end sides 71b to 74b of the first to fourth check valve bodies 71 to 74 are pushed and oscillated by the water pressure of the hot water flow path, and as a result, as shown in FIGS. As shown, it is configured to open the hot water channel.

  The distal end side of the hot water discharge nozzle 75 has a cylindrical shape, and the cylinder tip is arranged facing the front side of the case so that the cylinder center direction is substantially horizontal. Further, as shown in FIG. 8B, for example, a plurality of discharge ports 70 of the hot water discharge nozzle 75 are provided on the cylindrical peripheral wall 45 on the distal end side of the cylindrical shape of the hot water discharge nozzle 75 with a space therebetween in the circumferential direction. It is formed by a through hole, and the tube tip of the hot water discharge nozzle 75 is closed. Note that a plurality of discharge ports 70 are preferably formed, but a single number may be used.

  A cylindrical nozzle cover wall 77 is provided in the case 31 so as to cover the nozzle tip side region including the region where the discharge port 70 of the hot water discharge nozzle 75 is disposed with a space from the outer peripheral side of the hot water discharge nozzle 75. . The tip end side of the cylindrical shape of the nozzle cover wall 77 protrudes further forward than the tip end side of the hot water discharge nozzle 75, and as shown in FIG. A frame wall portion 92 projecting inward from the wall is formed, and an opening surrounded by the frame portion forms an outlet for fine bubbles, and a silencing orifice is formed in the opening.

  The inner wall of the side peripheral wall of the nozzle cover wall 77 forms an uneven wall 78 having an uneven surface. Then, hot water is discharged from the hot water discharge port 75 toward the uneven wall 78 of the inner peripheral wall of the nozzle cover wall 77, causing the hot water to collide with the uneven wall 78 to cause cavitation to generate fine bubbles. As described above, the fine bubble generating portion 76 is formed in the case 31 for generating fine bubbles by causing cavitation in the hot water discharged from the hot water discharge nozzle 75.

  In this embodiment, as shown in FIG. 8A, the through hole forming the discharge port 70 of the hot water discharge nozzle 75 has a cylindrical direction with respect to the cylindrical diameter direction of the hot water discharge nozzle 75. More specifically, the penetration direction of the hot water discharge port 75 is formed in the tangential direction of the inner periphery of the hot water discharge nozzle 75, but the formation of the hot water discharge port 6 is formed. The method is not particularly limited, and is appropriately set.

  During operation in the fine bubble generation mode, the fine bubbles generated from the fine bubble generation unit 76 are discharged into the case 31 from the cylindrical tip of the nozzle cover wall 77 as indicated by an arrow A in FIG. The fine bubble discharge port 34 formed in the case 31 is discharged into the bathtub 26. A plurality of the fine bubble discharge ports 34 are provided in a line at a position on the upper side of the case 31 with a space between each other. Between the fine bubble generation portion 76 and the fine bubble discharge port 34, a fine bubble generation portion is provided. A fine bubble collecting chamber 65 for collecting the fine bubbles generated from 76 and leading the fine bubbles to the fine bubble discharge port 34 is provided.

  When the circulation connector 1 is operated in the follow-up mode, as shown by an arrow B in FIG. 6 (b), the first check valve body 71 is closed with the second check valve body 72 closed. The bathtub hot water sucked from the hot water inlet 33 of the case 31 is introduced into the return pipe 23 through the bathtub hot water introduction chamber 35 and the return pipe communication passage 41, and the recirculation circulation path is made. Bath hot water returning to the outgoing pipe 24 passes through the outgoing pipe communication passage 42, the third check valve body 73 is opened, and discharged from the hot water outlet 32 of the case 31.

  Further, during the operation in the fine bubble generation mode, as shown by an arrow A in FIG. 6A, the second check valve body 72 is opened while the first check valve body 71 is closed, The bathtub hot water sucked from the hot water inlet 33 of the case 31 is introduced into the forward pipe 24 through the bathtub hot water introduction chamber 35 and the forward pipe communication passage 42. Also, hot water sent from the return pipe 23 to the bathtub 26 side through the fine bubble generating circulation path in a state where the air is overpressure-melted by the air melting unit 6 passes through the return pipe communication passage 41, and The fourth check valve body 74 is opened and guided to the hot water discharge nozzle 75. Then, as described above, the hot water is discharged from the hot water discharge nozzle 75, the fine bubbles are generated by the fine bubble generator 76, and discharged from the fine bubble discharge port 34 of the case 31.

  This embodiment is configured as described above. Normally, the three-way valves 8 and 9 are in the state shown in FIG. 3B. For example, when an automatic hot water filling switch of a remote control is turned on, the hot water When the hot water filling operation is performed and the hot water filling operation is finished, the bath pump 21 is activated and the bath water temperature (hot water temperature) is detected by the bath temperature sensor. When the temperature is lower than the set temperature), the chasing function is performed.

  The operation of the reheating function is that the bath pump 21 is driven and hot water in the bathtub 26 is circulated through the recirculation circulation path as shown by an arrow B in FIG. Is the operation in which the reheating burner 16 is driven to burn when it is detected by the running water switch 22 and the circulating hot water is heated to raise the temperature of the circulating hot water as it passes through the reheating heat exchanger 15. At this time, the flow of hot water in the circulation connector 1 is as shown in FIG. This reheating operation ends when the bath temperature sensor detects the bath temperature, and when the detected temperature reaches the bath set temperature, the combustion of the reheating burner 16 and the stop of the bath pump 21 are performed.

  The operation of the chasing function is performed not only after the automatic hot water filling operation performed when the automatic switch 94 of the remote controller 48 is turned on, but also when the chasing switch 93 of the remote controller 48 is turned on.

  In this embodiment, when the cloudy bubble generation switch 36 of the remote control is turned on, an operation on command for the fine bubble generation mode is issued, and as shown in the time chart of FIG. The valves 8 and 9 are switched to the state shown in FIG. 3A, and the air melting operation control unit 30 drives the air pump 3 of the air melting unit 6 for a short time, for example, within 5 seconds. be introduced.

  Thereafter, after the air pump 3 is stopped, the additional hot water operation control means 38 performs an additional hot water operation, for example, for 2 minutes, so that it is introduced from the hot water supply heat exchanger 7 side into the forward pipe 24 through the hot water pouring route. The pouring hot water is introduced into the hot water storage tank 2 of the air melting unit 6, and air is melted at an overpressure in the pouring hot water. Then, the hot water in which the air has been melted at an overpressure is guided to the bathtub 26 through the return pipe 23 and introduced into the circulation connector 1.

  Then, as shown in FIG. 6 (a), the fourth check valve body 74 is opened, and the hot water in which the air is over-pressure melted as described above is returned from the return pipe 23 to the circulating connector 1. It discharges from the hot water discharge nozzle 75 through the pipe communication passage 41, and the fine bubble generating part 76 generates cavitation in the discharged hot water to generate fine bubbles (white turbidity type), and the fine bubbles in the case 31 of the circulation connector 1. The ink is discharged from the discharge port 34.

  Next, as shown in FIG. 9, the air melting operation control unit 30 drives the air pump 3 of the air melting unit 6 again for a pump drive set time set within, for example, 15 seconds, and enters the hot water storage tank 2. Air is introduced. Thereafter, after the air pump 3 is stopped, the bath pump 21 and the pressure pump 44 are driven, for example, for 2 minutes, and the hot water in the bathtub is circulated through the circulation path for generating fine bubbles. Air is overpressure-melted in the bathtub hot water injected into the water tank 2 and guided to the bathtub 26 through the return pipe 23. Then, in the same manner as described above, the bathtub hot water is discharged from the hot water discharge nozzle 75 through the path shown in FIG. 6A, and the generated fine bubbles are discharged from the fine bubble discharge port 34 of the case 31 of the circulation connector 1. To do.

  Next, the air pump 3 of the air melting unit 6 is driven again by the air melting operation control unit 30 to perform the air introduction operation into the hot water storage tank 2, and then after the air pump 33 is stopped, the air pump 33 and the bath pump 21 are added. The pressure pump 44 is driven, and the bathtub hot water jet introduction operation is performed in which the bathtub hot water is circulated through the circulation path for generating fine bubbles and jetted into the hot water storage tank 2, and the air introduction operation and the bathtub hot water jet introduction operation are performed. And are repeated. In this embodiment, the discharge of fine bubbles from the fine bubble discharge port 34 is continued even during the air introduction operation by driving the air pump 3.

  Then, when the cloudy bubble generation switch 36 of the remote controller is pressed and the micro bubble generation mode operation off command is issued from the micro bubble generation mode on / off command unit, as shown in FIG. 9, the air pump 3, the bath pump 21, All the pressurizing pumps 44 are stopped, and hot water used for circulating hot water of the overpressure molten air in the hot water tank 2 of the air melting unit 6 is led out to the bathtub 26 side through the return pipe 23, and then the hot water supply heat exchanger The operation of feeding hot water into the forward pipe 24 from the side 7 through the pouring path and adding hot water by the hot water operation control unit 38 to introduce new hot water into the hot water storage tank 2 (cleaning operation) The hot water in the hot water storage tank 2 is replaced with new hot water.

  In this embodiment, for example, if the running water switch 22 does not turn on even after 30 seconds have elapsed after the start of driving the bath pump 21, it is determined that some abnormality has occurred, and the bath pump 21 is driven. A safety function is provided to stop and leave that effect, so that the bath device can be inspected after the bath pump 21 is stopped.

  According to the present embodiment, as described above, the air melting unit 6 is provided on the heat source machine side by interposing the air melting unit 6 between the return pipe 23 and the forward pipe 24 for recirculation. Unlike the case where it is provided on a dedicated pipe line connected to the bathtub 26, fine bubbles (white turbidity type) are easily generated using various heat source devices such as existing heat source devices without incurring a cost increase. A bath device that can be provided can be provided.

  Further, according to the present embodiment, as shown in FIG. 5, the circulating connector 1 connected to the return pipe 23 and the forward pipe 24 is connected to the return pipe communication path 41, the forward pipe communication path 42, and the hot water inlet. 33, the hot water discharge port 32, and the fine bubble discharge port 34 are formed in one case 31, and the first to fourth check valve bodies 71 to 74 provided in the case 31 function in the reheating mode. It is possible to circulate bathtub hot water through the recirculation circulation path, circulate bathtub hot water through the circulation path for generating fine bubbles in the fine bubble generation mode, and discharge the hot water to the bathtub. It is convenient, can take a place and can have a clean appearance, and the circulation connector 1 can be reduced in size and cost.

  Further, according to the present embodiment, the configuration of the fine bubble generating unit 76 is configured by arranging a hot water discharge nozzle 75 in which a plurality of discharge ports 70 as described above are formed in the cylinder circumferential direction, and a discharge port 70 of the hot water discharge nozzle 75. By having the nozzle cover wall 77 provided with the concavo-convex wall 78 surrounding the installation area, cavitation can be efficiently generated even if the momentum of the hot water discharged from the discharge port 70 of the hot water discharge nozzle 75 is not large. Can do. Therefore, a device such as a pressure pump 44 for overpressure-melting air in hot water can be reduced in size, and the cost of the bath device can be reduced.

  In particular, according to the present embodiment, the through hole forming the hot water discharge nozzle 6 of the hot water discharge nozzle 75 has its through direction inclined obliquely in the cylinder circumferential direction with respect to the cylindrical diameter direction of the hot water discharge nozzle 75. Since it is formed in the direction and tangential to the inner periphery of the hot water discharge nozzle 75, even if the momentum of hot water discharged from the hot water discharge port of the hot water discharge nozzle is not large, it is even more efficient and optimal. Cavitation is generated under the conditions, and fine bubbles (white turbidity type) can be generated.

  In addition, this invention is not limited to the said embodiment example, Various aspects can be taken. For example, the driving time of the air pump 3 during the operation in the fine bubble generation mode, the driving time of the pressurizing pump 44 and the bath pump 21, the time of adding hot water, etc. are limited to the time described in the above embodiment. Instead, it is appropriately set according to conditions such as the capacity of the hot water storage tank 2.

  In the above embodiment, the air melting operation control unit 30 receives the operation ON command in the fine bubble generation mode and performs the air introduction operation. Then, the addition hot water operation control unit 29 causes the hot water supply heat exchanger 7 to The hot water is sent into the hot water storage tank 2 of the air melting unit 6 and the hot water is injected and introduced to eject the hot water. However, this jet introduction operation may be omitted.

  Furthermore, in the above-described embodiment, the air melting control unit 30 performs the cleaning operation in response to the operation-off command in the fine bubble generation mode. Can be omitted.

  Further, in the above embodiment, the air melting unit 6 includes the hot water storage tank 2, the air pump 3, the pressure pump 44, and the air melting operation control unit 30, but the configuration of the air melting unit 6 is particularly limited. For example, the pressurizing pump 44 can be omitted. However, if a pressurizing pump 44 is provided, hot water is circulated by both the pressurizing pump 44 and the bath pump 21, and air is pressurized and melted in the hot water, the efficiency of the bath pump 21 is increased without increasing the size. Thus, an air melting operation can be performed.

  Further, in the above embodiment, the three-way valves 8 and 9 are provided as the path switching means. However, open / close solenoid valves are provided at positions A to D indicated by broken lines in FIG. Switching between the path and the circulation path for generating fine bubbles may be performed.

  Furthermore, in the said embodiment, although the circulation connector 1 was set as the structure shown in FIGS. 5-7, the structure of the circulation connector 1 is not specifically limited, It sets suitably. . For example, the configuration of the fine bubble generation unit 76 is not limited to the configuration (see FIG. 8) applied to the above-described embodiment example, and is appropriately set, and can generate fine bubbles by generating cavitation. The configuration of the check valve bodies 71 to 74, the hot water outlet 32, the hot water inlet 33, the fine bubble outlet 34, and the shape and size of the case 31 are various. Is set to

  Also, for example, as shown in FIGS. 10 (a) and 10 (b), two circulation connectors 1 (1a) and 1 (1b) are provided in the bathtub 26, and the circulation connector 1a is provided in the above embodiment. In addition, check valves 71 and 74 that function in the same manner as the first check valve body 71 and the fourth check valve body 74 are provided, and the second reverse valve provided in the above embodiment is provided in the circulation connector 1b. Two circulation connectors 1 may be provided to form a bath apparatus, such as providing check valves 72 and 73 that function in the same manner as the check valve body 72 and the third check valve body 73.

  Further, instead of the resin circulation connector 1, a circulation connector made of a material other than resin such as metal may be provided in the bathtub 26 and connected to the outgoing pipe 24 and the return pipe 23 to form a bath apparatus. Good.

  Furthermore, since the present invention is formed by connecting the air melting unit 6 to the outgoing pipe 24 and the return pipe 23 provided for circulating the hot water in the bathtub, The configuration on the heat source machine side, such as the configuration, is not particularly limited and may be set as appropriate. For example, the heating source device may have other functions such as heating. It may be a combustion type device or a cogeneration hot water supply heat source device.

1 is a system configuration diagram schematically illustrating an embodiment of a bath apparatus according to the present invention. It is a block diagram which shows the control structure of the fine bubble generation mode of the said embodiment example. It is explanatory drawing which shows typically operation | movement of the said embodiment. It is a top view which shows typically the example of the remote control apparatus provided in the said embodiment example. It is sectional explanatory drawing which shows the structure of the circulation connection tool provided in the said embodiment example. It is explanatory drawing which shows operation | movement of the said circulation connection tool. It is explanatory drawing which shows the said circulation connector in a disassembled state. It is a schematic diagram for demonstrating the fine bubble generation | occurrence | production part provided in the said circulation connector. It is a time chart of fine bubble generation operation of the above embodiment. It is explanatory drawing which shows another example of the circulation connection tool provided in the bath apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circulation connector 2 Hot water storage tank 3 Air pump 5 Bypass path 6 Air melting unit 7 Hot water heat exchanger 8,9 Three-way valve 15 Reheating heat exchanger 19 Connection path 21 Bath pump 23 Return pipe 24 Outward pipe 26 Bathtub 28 Path switching Control means 30 Air melting operation control section 31 Case 32 Hot water discharge port 33 Hot water suction port 34 Fine bubble discharge port 35 Bath hot water introduction chamber 36 Fine bubble generation switch 40 Fine bubble generation control means 41 Return pipe communication path 42 Outward pipe communication path 44 Pressurizing pump 71 1st check valve body 72 2nd check valve body 73 3rd check valve body 74 4th check valve body 76 Fine bubble generating part

Claims (5)

  An outgoing pipe connecting the reheating heat exchanger and the bathtub is connected to one end side of the reheating heat exchanger for reheating the hot water in the bathtub, and a connecting path is connected to the other end side of the reheating heat exchanger. And a return pipe connecting the bath pump and the bathtub is connected to the suction port side of the bath pump, and the return pipe communicates with the forward pipe. And an air melting unit for connecting one end side to the outgoing pipe and connecting the other end side to the return pipe to overpressure melt the hot water for generating fine bubbles during operation in the fine bubble generation mode. One end side of the air melting unit is connected closer to the reheating heat exchanger than the bypass path connecting portion of the forward pipe, and the other end side of the air melting unit is the bypass of the return pipe Connected closer to the bathtub than the road connection A recirculation path for circulating the hot water in the bathtub, passing through the return pipe, the bath pump, the connection path, the reheating heat exchanger, and the outbound pipe in order and returning to the bathtub; Path switching means is provided for switching the path to the microbubble generating circuit, and the circulation path for generating fine bubbles passes the bathtub hot water through the forward pipe to the bypass path, and from the bypass path to the return pipe, the bath pump, and the connection path. And the reheating heat exchanger and the outgoing pipe are sequentially introduced into the air melting unit from the outgoing pipe to create an overpressure molten hot water of the air, and the air is overpressure melted from the air melting unit. It is constituted by a path for passing hot water through the return pipe and returning it to the bathtub, and receives the microbubble generation mode operation on command from the recirculation circulation path by the path switching means. Path switching control for switching the path to the live circulation path, and for switching the path from the circulation path for generating fine bubbles to the recirculation circulation path by the path switching means upon receiving an operation-off command in the fine bubble generation mode A bath apparatus characterized in that means are provided.   The air melting unit is a hot water storage tank for storing hot water introduced into the air melting unit, an air pump for introducing air into the hot water storage tank, and pressure-melting the air introduced by the air pump into the hot water in the hot water storage tank. An air introduction operation for driving the air pump to introduce air into the hot water storage tank, and driving the pressure pump and the bath pump to operate the bathtub. Air melting for over-pressure melting of hot water in the hot water by circulating hot water through a circulation path for generating fine bubbles and alternately repeating the hot water jetting introduction operation of jetting from the outgoing pipe into the hot water tank of the air melting unit. The bath apparatus according to claim 1, further comprising an operation control unit.   A pouring path is formed to guide hot water from the outlet side of the hot water heat exchanger to the outgoing pipe, and the air melting operation control unit performs the air introduction operation after receiving the operation on command in the fine bubble generation mode, A hot water injection operation is performed in which hot water is sent from the hot water supply heat exchanger side through the pouring path to the outgoing pipe, and hot water is injected into the hot water tank of the air melting unit from the outgoing pipe side. 3. The bath apparatus according to claim 2, wherein air is over-melted into the pouring hot water, and then the air introduction operation and the bath hot water jetting introduction operation are alternately repeated.   A pouring path is formed to guide the hot water from the outlet side of the hot water heat exchanger to the outgoing pipe, and the air melting operation control unit receives an operation off command in the fine bubble generation mode, and in the hot water tank of the air melting unit Deriving operation to the bathtub side through the return pipe of the hot water used for circulating the hot water of the overpressure molten air, and hot water is sent from the hot water supply heat exchanger side to the outgoing pipe via the pouring path. The operation of introducing new hot water into the hot water tank from which hot water has been derived from the pipe side by the deriving operation is performed in parallel or after the operation of deriving hot water to the bathtub side. The bath apparatus according to claim 2 or 3, wherein   The bathtub is provided with a circulation connector connected to the return pipe and the outgoing pipe. The circulation connector has a case provided inside the inner wall of the bathtub, and hot water is supplied to the bathtub in the case. A hot water discharge port for discharging water and a hot water suction port for sucking bathtub hot water are provided, and an introduction chamber for bathtub hot water sucked from the hot water suction port is formed in the case. A return pipe communication passage that communicates with the return pipe is provided, and a first check valve body is provided at a communication portion between the return pipe communication passage and the bathtub hot water introduction chamber, and the bathtub hot water introduction chamber is provided. And an outgoing pipe communication passage that communicates with the outgoing pipe, and a second check valve body is interposed in the communication portion between the outgoing pipe communication passage and the bath water introduction chamber. The pipe communication passage communicates with the hot water discharge port via a third check valve body, and the return pipe communication passage is A hot water containing pressure-melted air is communicated with a hot water discharge nozzle for discharging the hot water into the case through a fourth check valve body, and cavitation is generated in the hot water discharged from the hot water discharge nozzle. A fine bubble generating part for generating is provided in the case, and a fine bubble discharge port for discharging the cloudy fine bubbles generated from the fine bubble generating part to the bathtub is formed in the case, and the operation in the reheating mode is performed. Sometimes, the first check valve body is opened with the second check valve body closed, and the bathtub hot water drawn from the hot water inlet of the case communicates with the bath hot water introduction chamber and the return pipe. Bath hot water that is introduced into the return pipe through the passage and returns to the outgoing pipe through the recirculation circulation path passes through the outgoing pipe communication passage, and the third check valve body is opened to supply hot water in the case Discharging from the discharge port, During the operation in the fine bubble generation mode, the second check valve body is opened with the first check valve body closed, and the bathtub hot water sucked from the hot water inlet of the case is the bathtub hot water. The air is introduced into the outgoing pipe through the introduction chamber and the outgoing pipe communication passage, and is sent from the return pipe to the bathtub side through the circulation path for generating fine bubbles while the air is melted at an overpressure by the air melting unit. The hot water is passed through the return pipe communication passage, the fourth check valve body is opened and guided to the hot water discharge nozzle, the hot water is discharged from the hot water discharge nozzle, and fine bubbles are generated by the fine bubble generator. The bath apparatus according to any one of claims 1 to 4, wherein the bath apparatus is configured to be generated and discharged from a fine bubble discharge port of the case.

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