JP5117910B2 - Bath facilities - Google Patents

Description

  The present invention provides a heat source device comprising hot water supply means for supplying hot water heated by a latent heat recovery type heat exchanger to a bathtub hot water pipe connected to the bathtub, and is discharged from the heat exchanger to the drain tank. The present invention relates to a bath facility provided with drain drainage means for supplying a drain to be stored to a drain drain pipe connected to a drainage point.

  In such a bath facility, a heat source machine equipped with a latent heat recovery type heat exchanger recovers the latent heat of the burner flue gas and heats hot water, and has excellent heat recovery efficiency. In the recovery heat exchanger, condensed water, so-called drain, is generated as the latent heat of the combustion exhaust gas is recovered. Therefore, in a bath facility equipped with such a heat source device, it is heated by the heat exchanger. In addition to the hot water supply means for supplying hot water to the bathtub hot water pipe connected to the bathtub, the drain is connected to a drain drain pipe connected to the bathroom drainage point (for example, near the drain outlet provided on the bathroom floor). It is necessary to provide a drain drain means to supply.

As a conventional example of such a bath facility, there is one in which a drain drain pipe is piped outside a hot water pipe for a bathtub (see, for example, Patent Document 1).
By the way, in the conventional example of the above-described bath facilities, the bathtub forward pipe and the bathtub return pipe that circulate the hot water in the bathtub through the heat source machine are provided in a state that also serves as the bathtub hot water pipe. The three pipes with drain drain pipes added to the forward pipes were inserted through the sheath pipes for the three pipes, and were piped under the floor or the ceiling.

JP 2005-337710 A

By the way, an existing heat source apparatus that does not include a latent heat recovery type heat exchanger may be replaced with a heat source apparatus that includes a latent heat recovery type heat exchanger. And as an existing heat source machine, generally, a return pipe for bathtubs and a forward pipe for bathtubs as hot water pipes for bathtubs are piped under the floor or the ceiling in a state where they are inserted through a sheath pipe for two pipes.
However, when replacing the heat source unit as described above, in the conventional bath facilities, the existing two-pipe sheath pipes are removed, and the three return pipes, the return pipe for the bathtub, the forward pipe for the bathtub, and the drain drain pipe Since the drain pipe for the three pipes inserted in the state where the drain drain pipe is located outside the return pipe for the bathtub and the forward pipe for the bathtub is piped under the floor or the ceiling, a large-scale construction is required. The work was difficult.
In addition, since the diameter of the three-tube sheath tube for inserting the three tubes is larger than the diameter of the two-tube sheath tube for inserting the two tubes, the sheath for the three tube In order to lay the pipe, it is necessary to make a hole in the flooring or wall material newly, and it is also necessary to remove the existing two-pipe pod and re-install the three-pipe pod. As a result, large-scale construction is required, and piping work becomes difficult.

  In addition, when drain drain means is provided to supply drain to the drain drain pipe connected to the drainage point on the bathroom side, it is detected that drain leaked from the drain drain pipe has mixed into the hot water in the bathtub hot water pipe. It is desirable to provide a means that can.

  The present invention has been made in view of the above circumstances, and the purpose thereof is to facilitate the piping work and that the drain leaked from the drain drain pipe is mixed into the hot water in the hot water pipe for the bathtub. It is in the point which provides the bath equipment which can detect.

The bath equipment of the present invention is discharged from the heat exchanger to a heat source device having hot water supply means for supplying hot water heated by a latent heat recovery type heat exchanger to a bathtub hot water pipe connected to the bathtub. Drain drainage means for supplying drain stored in the drain tank to a drain drain pipe connected to the drainage point is provided,
The first characteristic configuration is that the drain drain pipe is piped through the bathtub hot water pipe, and a leak detecting means for detecting an abnormal leak state in which drain leaks from the drain drain pipe into the bathtub hot water pipe. It is in the point provided.

That is, since the drain drain pipe is piped through the inside of the hot water pipe for bathtubs, the drain drain pipe can be provided using the space where the hot water pipe for bathtubs is arranged, so that the piping work is facilitated. obtain.
That is, for example, the drain drain pipe can be piped under the floor or the ceiling by piping the drain drain pipe inside the hot water pipe for the bathtub while the existing bath water pipe is piped under the floor or the ceiling. Therefore, it is not necessary to remove the existing hot water pipe for bathtubs, and it is not necessary to make holes in the flooring or wall material, so that a large-scale construction is not required and the piping work can be facilitated.

In addition, if the drain drain pipe is piped through the inside of the bathtub return pipe or the bathtub forward pipe, when the drain drain pipe leaks, the drain leaks into the bathtub return pipe or the bathtub forward pipe and becomes hot water. Although there is a leak detection means that detects an abnormal leak condition in which drain leaks from the drain drain pipe into the bathtub hot water pipe, the drain leaked from the drain drain pipe is It is possible to detect that it has mixed into the hot water in the pipe.
Accordingly, it has become possible to provide a bath facility that can facilitate the piping work and can detect that the drain leaked from the drain drain pipe is mixed into the hot water in the hot water pipe for bathtub.

  In addition to the first feature configuration described above, the second feature configuration includes the hot water electrode provided so that the leakage detection means is electrically connected to hot water filling the hot water pipe for the bathtub, and the drain. A drain electrode provided so as to be electrically connected to a drain filled in the drain pipe, a continuity measuring means for detecting continuity between the hot water electrode and the drain electrode, and a hot water pipe for the bathtub When the continuity is detected by the continuity measuring means in a state where the inside is filled with hot water and the inside of the drain drain pipe is filled with the drain, the determination means is configured to determine that the leakage is abnormal. There is in point.

That is, when the continuity between the hot water electrode and the drain electrode is detected by the continuity measuring means in a state where the interior of the hot water pipe for bathtub is filled with hot water and the interior of the drain drain pipe is filled with drain, The determination means is configured to determine that the leakage is abnormal.
In other words, since the drain drain pipe is generally composed of a resin pipe, the hot water filling the bathtub hot water pipe and the drain filling the drain drain pipe are electrically separated by the drain drain pipe. However, if the drain drain pipe leaks and the leak becomes abnormal, the hot water that fills the bathtub hot water pipe and the drain that fills the drain drain pipe at the location where the drain drain pipe leaks are generated. Since it is electrically connected and the hot water electrode and the drain electrode are in a conductive state, it is detected by the continuity measuring means that the hot water electrode and the drain electrode are electrically connected, and the leakage is detected by the discriminating means. By determining that the state is abnormal, a leakage abnormal state can be detected.
And since it is comprised so that it may detect that it is in a leakage abnormal state because the electrode for hot water and the electrode for drain are conducted in this way, if it becomes a leakage abnormal state, the electrode for hot water and the drain electrode An abnormal leakage state can be immediately detected by conduction.
Therefore, it has become possible to provide a bath facility provided with a leak detection means that can immediately detect an abnormal leak state.

  In the third feature configuration, in addition to the first feature configuration, the leak detection means includes a drain amount detection sensor for detecting a drain amount stored in the drain tank, and the hot water pipe for the bathtub is hot water. When the drain drainage means is operated in the reverse transport state so as to transport the fluid in the drain drain pipe into the drain tank in a full state, the drain amount detection sensor increases the drain amount. It is comprised from the discriminating means which discriminate | determines that it is the said leakage abnormal state, if detected.

In other words, when the inside of the bathtub hot water pipe is filled with hot water, when the drain draining means is operated in the reverse transport state so as to transport the fluid in the drain drain pipe into the drain tank, the drain amount detection sensor When an increase in the drain amount is detected, the discrimination means discriminates that the leakage is abnormal.
In other words, when the drain discharge means is operated in the reverse conveyance state, the drain in the drain drain pipe is sucked and transported into the drain tank. When the drain is transported in this way, Since the pressure becomes negative with respect to the hot water pipe for the bathtub, the hot water in the hot water pipe for the bath enters the drain drain pipe in the abnormal state of leakage. Even when the drain drain pipe is not filled with hot water, the drain drain pipe has a negative pressure with respect to the bathtub hot water pipe, so that the hot water in the bathtub hot water pipe penetrates into the drain drain pipe in a leakage abnormal state.
When the drain discharge means is operated in the reverse transport state with the hot water in the bathtub water pipe entering the drain drain pipe in this way, the hot water that has entered the drain drain pipe is transported to the drain tank. By detecting the increase in the drain amount (total amount of drain and hot water) by the drain amount detection sensor due to the conveyed hot water, the discrimination means determines that the leak is abnormal, thereby determining the leak abnormal state. Can be detected.
And, when a sensor for detecting the drain amount in the drain tank is provided to execute the drain discharge operation for discharging the drain in the drain tank, the sensor can be used as a drain amount detection sensor, Also, by operating the existing drain discharge means in the reverse transport state, hot water in the drain drain pipe can be transported into the drain tank, so that it is possible to suppress the complication of the configuration while providing the leak detection means. it can.
Accordingly, it has become possible to provide a bath facility that can suppress the complication of the configuration while providing the leakage detection means.

  In a fourth feature configuration, in addition to the third feature configuration, the determination unit operates the drain draining unit in a normal conveyance state so as to discharge the drain stored in the drain tank, and then the bathtub. When the inside of the hot water pipe is filled with hot water, the drain amount detection is performed when the drain drain means is operated in a reverse transport state so as to transport the fluid in the drain drain pipe into the drain tank. When the increase in the drain amount is detected by the sensor, it is configured to determine that the leakage is abnormal.

That is, after the drain drainage means is operated in a normal conveyance state so as to discharge the drain stored in the drain tank, the drain drainage means is drained in the state where the hot water pipe for the bathtub is filled with hot water. When the increase in the drain amount is detected by the drain amount detection sensor when the fluid in the pipe is operated in the reverse transport state so as to transport the fluid into the drain tank, it is determined that the leakage is abnormal by the determination means. It is configured.
In other words, by operating the drain drainage means in the positive conveyance state, the drain in the drain drain pipe can be drained to the drainage point, and the drain drain pipe has a negative pressure relative to the inside of the hot water pipe for the bathtub. Then, the hot water in the bathtub hot water pipe enters the drain drain pipe. After that, by operating the drain draining means in the reverse transport state, the hot water entering the drain drain pipe is transported to the drain tank. Therefore, the drain amount is detected by the drain amount detection sensor by the hot water transported to the drain tank. By detecting an increase in the total amount of hot water and water), it is possible to detect an abnormal leakage state by determining that the leakage is abnormal by the determination means.
In other words, since the drain drainage means is operated in the reverse transport state in a state where there is no or little drain in the drain drain pipe and the fluid in the drain drain pipe is transported into the drain tank, the amount of drain (total of drain and hot water) By increasing the ratio of the hot water conveyed to the drain tank in the increase in the amount, the leakage abnormal state can be detected accurately.
Therefore, it has become possible to provide a bath facility that can accurately detect an abnormal leakage state.

  In addition to the first characteristic configuration described above, the fifth characteristic configuration includes a water pressure sensor for detecting the pressure of the hot water when the leak detection means is filled with the hot water pipe for the bathtub, and the hot water pipe for the bathtub. In the state where the hot water supply means is stopped, and the drain drain pipe is filled with drain, when the drain drain means is operated, the pressure is increased by the water pressure sensor. It is comprised from the discrimination means which discriminate | determines that it is the said leakage abnormal state, if detected.

That is, when the hot water supply pipe is filled with hot water, the hot water supply means is stopped, and the drain drain pipe is filled with drain, the pressure of the pressure is detected by the water pressure sensor when the drain drain means is operated. When an increase is detected, the determining means determines that the leakage is abnormal.
In other words, by operating the drain discharge means in the positive conveyance state, the drain drain pipe has a positive pressure relative to the bathtub hot water pipe, and the drain leaks from the drain drain pipe into the bathtub hot water pipe, thereby supplying hot water. Since the pressure rises even when the hot water pressure in the hot water pipe for the bathtub is not raised, the pressure is detected by the water pressure sensor when the drain drainage means is operated in the state where the hot water supply means is stopped. By detecting that the leakage is abnormal, it is possible to detect the abnormal leakage state.
And in order to detect the water level in a bathtub, when the water level sensor which detects the pressure of the hot water in the hot water pipe for bathtubs is provided, since the water level sensor can be utilized as a water pressure sensor, leak detection means However, complication of the configuration can be suppressed.
Accordingly, it has become possible to provide a bath facility that can suppress the complication of the configuration while providing the leakage detection means.

  In the sixth feature configuration, in addition to the first feature configuration, the leak detection unit includes a drain amount detection sensor for detecting a drain amount stored in the drain tank, and a drain drain unit in the drain tank. If the drain amount detection sensor detects that the drain amount has decreased by a set amount when the operation is performed to discharge the stored drain, the leakage occurs when the set time is shorter than the set reference time. It is in the point comprised from the discrimination means which discriminate | determines that it is in an abnormal state.

That is, when the drain drainage means is operated so as to discharge the drain stored in the drain tank, the time required for the drain amount detection sensor to detect that the drain amount is reduced by the set amount is set as a reference. When the set time is shorter than the time, the determining unit determines that the leakage is abnormal.
That is, when the drain drainage means is operated so as to discharge the drain stored in the drain tank, if it is in a leakage abnormal state, the drainage leaks from the drain drain pipe into the hot water pipe for bathtub, and the pressure loss becomes small. Since the time for discharging the set amount of drain from the drain tank is shortened, the drain amount is detected by the drain amount detection sensor when the drain draining means is operated to discharge the drain stored in the drain tank. When the time required for detecting that the set amount has decreased is shorter than the set reference time, it is possible to detect the leakage abnormal state by determining that the leakage abnormal state is present.
Then, in order to discharge the drain stored in the drain tank to the drainage point, it is possible to detect the abnormal leakage state only by operating the drain draining means to discharge the drain stored in the drain tank. It is possible to detect an abnormal leakage state without operating the drainage means.
Therefore, it has become possible to provide a bath facility provided with a leakage detection means that can detect an abnormal leakage state without specially operating the drain draining means.

  In addition to any one of the first to sixth characteristic configurations, the seventh characteristic configuration includes a heat source machine side connection part and a bathtub hot water pipe side connection part at the end of the bathtub hot water pipe on the heat source machine side. A heat source machine side joint provided in a state of communicating in the passage is provided, and the bathtub side connection portion and the bathtub hot water pipe side connection portion are communicated in the internal passage to the end portion on the bathtub side of the bathtub hot water pipe. A drain drainage pipe insertion part that is provided with a bathtub side joint that communicates the internal passage with the side wall part between the heat source machine side connection part and the bathtub hot water pipe side connection part in the heat source machine side joint. The drain drain pipe insertion portion is provided with a sealing member that seals the drain drain pipe in a watertight manner in a state where the drain drain pipe is inserted, and the bathtub side connection portion and the hot water pipe for the bathtub in the bathtub side joint are provided. Drain discharge connecting the internal passage to the outside on the side wall between the side connection A pipe insertion part is provided, and a drainage pipe insertion part is provided with a sealing member that seals in a watertight manner in a state in which the drainage drainage pipe is inserted, and the drainage pipe part in the drainage drainage pipe is a heat source device. In the state where the end on the side protrudes outside from the drain drain pipe insertion portion of the heat source machine side joint and the end on the bathtub side protrudes outside from the drain drain pipe insertion portion of the bathtub side joint It exists in the point provided so that it may be located in a pipe | tube.

  That is, the end on the heat source side of the hot water pipe for the bathtub and the end on the bathtub side are connected to the hot water pipe side connecting part for the bathtub of the heat source side joint, the hot water pipe side connecting part for the bathtub side joint, and The heat source machine side joint of the heat source machine side joint is connected directly to the heat source machine or indirectly through a pipe member or the like, and the bathtub side connection part of the bathtub side joint is directly to the bathtub or In a state of being indirectly connected via a pipe member or the like, a hot water pipe for a bathtub is provided over the heat source machine and the bathtub, and the drain drain pipe is a drain drain pipe of the heat source machine side joint at the end of the heat source machine side. The drain side drainage of the heat source unit side joint is provided so as to be located in the hot water pipe for the bathtub, with the end of the bathtub side projecting outward from the insertion part and projecting from the drain drainage pipe insertion part of the bathtub side joint to the outside. Each of the drainage pipe insertion part of the pipe insertion part and the bathtub side joint Sealed in watertight form by sealing member in a state of inserting the down drain.

  The drain drain pipe has an end on the heat source unit side protruding outside from the drain drain pipe insertion part of the heat source unit side joint, and an end on the bathtub side protruding outside from the drain drain pipe insertion part of the bathtub side joint Therefore, the existing heat source machine that does not have a latent heat recovery type heat exchanger is replaced with a heat source machine that has a latent heat recovery type heat exchanger. In the case of replacement, it is possible to install the drain drain pipe in the existing bathtub hot water pipe while the existing bathtub hot water pipe is piped. Since there is no need to remove hot water pipes and there is no need to make holes in the flooring or wall material, large-scale construction is not required, and piping work can be facilitated.

Incidentally, the piping structure for a bath facility according to the present invention can be applied to a case where a bath facility is newly installed.
For example, when a bathtub return pipe and a bathtub forward pipe are provided as a hot water pipe for a bathtub, the drain drain pipe is provided inside one of the bathtub return pipe and the bathtub forward pipe. As the sheath pipe, a pipe having a small diameter through which two pipes of a bathtub return pipe and a bathtub forward pipe can be used can be used.
That is, the piping structure for bath equipment according to the present invention is particularly suitable when it is desired to reduce the diameter of the sheath due to a narrow piping space.

  Accordingly, it is possible to provide a bath facility capable of facilitating piping work when replacing an existing heat source apparatus that does not include a latent heat recovery type heat exchanger with a heat source apparatus that includes a latent heat recovery type heat exchanger. I was able to do it.

[First Embodiment]
Hereinafter, a first embodiment of the bath facility of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the bath facility is connected to a bathtub Y with hot water heated by a latent heat recovery type heat exchanger (hereinafter sometimes referred to as a latent heat recovery heat exchanger) N2. A drain D as a discharge point for the drain discharged from the heat exchanger N2 and stored in the drain tank 8 to the heat source G provided with a hot water solenoid valve 42 as hot water supply means for supplying to the bathtub hot water pipe P. A drain drain pump 9 is provided as drain drain means for supplying to the drain discharge pipe 4 connected to a nearby location. By the way, the drainage port D is provided on the floor of the bathroom where the bathtub Y is installed.

As shown in FIG. 1, the heat source machine G heats water from a water supply channel 1 connected to a general household water pipe by a gas combustion burner g1, and supplies hot water after heating to a hot water tap at the tip. Hot water circulating operation unit A for supplying hot water to the heat consuming terminal T or chasing the hot water in the bathtub Y by the hot water supply operating unit A supplied to the hot water supply path 3 provided with 2 and the gas combustion type burner g2. B, an operation control device C that controls the operation of the heat source device G, a main remote controller R1, a bathroom remote controller R2, and the like.
As the heat consuming terminal T, for example, a bathroom heater / dryer, a floor heater or the like is provided. The main remote controller R1 is provided near the kitchen, etc., and the bathroom remote controller R2 is provided in the bathroom.

The hot water supply operation unit A and the hot water circulation operation unit B will be described.
Each of the hot water supply operation unit A and the hot water circulation operation unit B includes a main heat exchanger N1 in addition to the latent heat recovery heat exchanger N2, and the main heat exchanger N1 and the latent heat recovery heat exchanger N2 are provided. Are arranged side by side along the combustion exhaust gas flow direction with the latent heat recovery heat exchanger N2 positioned on the lower side in the combustion exhaust gas flow direction from the burners g1 and g2 to the exhaust passage 5.
Then, in the latent heat recovery heat exchanger N2, the hot water is heated mainly by the latent heat of the combustion exhaust gas of each burner g1, g2, and in the main heat exchanger N1, mainly by the sensible heat of the combustion exhaust gas of each burner g1, g2. The hot water heated by the latent heat recovery heat exchanger N2 is heated.

From each latent heat recovery heat exchanger N2, acidic condensate that is combustion generated water, that is, the drain is generated. This drain is collected by the drain pan 6 and supplied to the neutralizer 7, and the neutralizer After being neutralized at 7, it is configured to be stored in the drain tank 8. Although not described in detail, the neutralizer 7 is loaded with a neutralizing agent (for example, calcium carbonate) that neutralizes the drain. The drain tank 8 is provided with a drain amount detection sensor 91 for detecting the amount of drain stored in the drain tank 8.
A drain drain pump 9 is provided between the drain tank 8 and the drain drain pipe 4, and the drain sucked from the drain tank 8 is discharged by the drain drain pump 9 into the drain drain pipe 4. The drain stored in the tank 8 is sent out through the drain drain pipe 4 and discharged from the drain port D.
Incidentally, as shown in FIG. 7, the drain amount detection sensor 91 includes an upper limit detector 91 a that detects whether or not the drain amount in the drain tank 8 is equal to or higher than the upper limit storage amount, and the drain amount in the drain tank 8. A lower limit detecting unit 91b that detects whether or not the amount is equal to or less than the lower limit storage amount, the drain amount in the drain tank 8 being equal to or greater than the upper limit storage amount, and the drain amount in the drain tank 8 being equal to or less than the lower limit storage amount. A certain state and a state where the drain amount in the drain tank 8 is not more than the upper limit storage amount and not less than the lower limit storage amount can be detected.

  A gas supply path K for supplying general household fuel gas to the burners g1 and g2 is connected to the hot water supply operation section A and the hot water circulation operation section B. An electromagnetic gas proportional valve 10 for adjusting the amount and an intermittent valve 11 for intermittently supplying fuel gas are provided. The hot water supply operation unit A and the hot water circulation operation unit B are provided with combustion fans 12 for supplying combustion air to the burners g1 and g2, and further, although not shown, each burner g1, In the vicinity of g2, an ignition igniter for performing an ignition operation and a frame rod for detecting whether or not ignition is performed are provided.

  The water supply path 1 is connected to the hot water inlet of the latent heat recovery heat exchanger N2 in the hot water supply operating section A, and the hot water supply path 3 is connected to the hot water outlet of the main heat exchanger N1 in the hot water operating section A. Thus, the water supplied through the water supply channel 1 is heated by the latent heat recovery heat exchanger N2 and the main heat exchanger N1 and supplied to the hot water tap 2 through the hot water supply channel 3.

The water supply channel 1 is provided with a water supply thermistor 13 for detecting the water supply temperature and a water amount sensor 14 for detecting the water supply amount, and is located downstream of the water supply thermistor 13 and the water amount sensor 14 in the water supply channel 1. And the hot water supply path 3 are connected by a water supply bypass path 15 so as to bypass the heat exchangers N1 and N2.
A mixing valve 17 that adjusts the mixing ratio between the amount of hot water from the main heat exchanger N1 and the amount of water from the water supply bypass passage 15 is provided at a connection point between the hot water supply passage 3 and the water supply bypass passage 15, and the water supply passage is provided. The hot water thermistor 16 for detecting the temperature of the hot water sent from the main heat exchanger N1 is provided on the upstream side of the connection location of the water supply bypass passage 15 in FIG. On the downstream side of the connection point, in order from the upstream side, a hot water supply thermistor 18 for detecting the temperature of hot water after mixing by the mixing valve 17, a water proportional valve 19 for adjusting the amount of hot water, and an interruption of general hot water supply are provided. An interrupting water amount sensor 20 for detection is provided.

The hot water outlet of the heat consuming terminal T and the inlet of the latent heat recovery heat exchanger N2 in the hot water circulation operation part B are connected by a return path 21 for hot water circulation, and the main heat in the hot water circulation operation part B The hot water outlet of the exchanger N1 and the hot water inlet of the heat consuming terminal T are connected by a hot water circulation return path 22, and an expansion tank 23 is interposed in the hot water circulation return path 21. For the hot water circulation, the hot water in the expansion tank 23 is sucked into the hot water circulation return path 21 downstream of the expansion tank 23 and sent to the latent heat recovery heat exchanger N2 of the hot water circulation operation unit B. A pump 24 is provided.
Then, hot water circulates across the latent heat recovery heat exchanger N2, the main heat exchanger N1, and the heat consuming terminal T through the warm water circulation forward path 22 and the warm water circulation return path 21 by the flow action of the warm water circulation pump 24. Thus, the hot water heated by the latent heat recovery heat exchanger N2 and the main heat exchanger N1 is circulated and supplied to the heat consuming terminal T.

  The warm water circulation path 22 includes a circulating hot water thermistor 25 that detects the temperature of hot water after being heated by the latent heat recovery heat exchanger N2 and the main heat exchanger N1, and hot water to the heat consuming terminal T. A terminal thermal valve 26 for intermittent supply is provided.

A location upstream of the expansion tank 23 in the warm water circulation return path 22 and the warm water circulation return path 21 is connected by a warm water circulation bypass path 27 that bypasses the heat consuming terminal T and circulates hot water. The bypass path 27 is provided with a remedy heat exchanger 28 and a remedy heat valve 29 for remedying hot water in the bathtub Y.
The hot water outlet portion of the heat exchanger for remedy 28 and the circulation adapter 30 provided in the bathtub Y are connected by the outward passage 31 for the bathtub, and the hot water inlet portion of the circulation adapter 30 and the heat exchanger for remedy 28 is provided. Are connected by a return path 32 for bathtubs, and a circulation pump 33 for remedy is provided in the return path 32 for tubs so that hot water in the bathtub Y is sucked and sent to the heat exchanger 28 for remedy. Yes.
The hot water of the bathtub Y is circulated and supplied to the heat exchanger 28 for remedy through the bathtub forward path 31 and the bathtub return path 32 by the flow action of the circulator circulation pump 33.

Then, the hot water circulation pump 24 is operated with the terminal thermal valve 26 closed and the remedy thermal valve 29 opened, and the latent heat recovery heat exchanger N2 and the main heat exchanger N1 are operated. The heated hot water is circulated and supplied to the remedy heat exchanger 28 in a state of bypassing the heat consuming terminal T, and the remedy circulation pump 33 is operated to supply the hot water from the bathtub Y to the remedy heat exchanger 28. By circulating supply, the hot water of the bathtub Y is heated by the heat exchanger for remedy 28 to remedy the bathtub Y.
That is, the warm water circulation operation section B includes the warm water circulation forward path 22, the warm water circulation return path 21, in addition to the burner g2, the main heat exchanger N1, and the latent heat recovery heat exchanger N2. A hot water circulation pump 24, the hot water circulation bypass 27, the remedy heat exchanger 28, the terminal thermal valve 26, the remedy thermal valve 29, and the like are provided.

  In the bathtub return path 32, the water level sensor 34 as a water pressure sensor that detects the water level in the bathtub Y by detecting the pressure in order from the upstream side, the temperature of the hot water taken out from the bathtub Y, that is, the temperature of the bathtub Y A bathtub return temperature thermistor 35 that detects the temperature of hot water, an electromagnetic bath two-way valve 36 that opens and closes the bathtub return path 32, the recirculation pump 33, and a water flow switch 37 are provided. The path 31 is provided with a bathtub temperature thermistor 38 that detects the temperature of hot water supplied to the bathtub Y.

A hot water supply passage 41 for supplying hot water from the hot water supply passage 3 to the bathtub Y is branched from a location between the water proportional valve 19 and the interrupting water amount sensor 20 in the hot water supply passage 3. The bath return path 32 is connected to a place between the recirculation pump 33 for remedy and the water flow switch 37. The hot water filling path 41 is connected to the hot water filling path 41 in order from the upstream side. A valve 42 and a hot water check valve 43 are provided.
An air layer forming hopper 44 communicating with the hot water filling passage 41 is interposed between the hot water filling solenoid valve 42 and the hot water filling check valve 43 in the hot water filling passage 41. The air layer forming hopper 44 is provided with a drainage channel 45 for draining hot water and an electromagnetic drain valve 46 for opening and closing the drainage channel 45, and an end of the drainage channel 45 is located in the bathtub return channel 32. It is connected to a location between the bath two-way valve 36 and the memorial circulation pump 33.

  When the hot water solenoid valve 42 is opened, the hot water heated by the hot water supply operating part A and supplied through the hot water passage 41 passes through the bathtub return path 32 and the heat exchange for the remedy. The hot water flowing through both sides of the container 28 and supplied through the hot water filling passage 41 is supplied to the bathtub Y through both the bathtub outward passage 31 and the bathtub return passage 32.

The drain drain pipe 4 is piped through the inside of the hot water pipe P for bathtubs, and then the piping structure for bath facilities in which the drain drain pipe 4 is piped through the inside of the hot water pipe P for bathtubs will be described.
As shown in FIG.1 and FIG.2, the said bathtub going-out path 31 is the state connected to the said heat exchanger 28 for remedies, and the bathtub going-in pipe 31a provided in the casing 39 of the said heat source machine G, It is comprised from the bathtub outer pipe 31b provided outside the casing 39 of the said heat-source equipment G in the state connected to the said circulation adapter 30 with which the bathtub Y was equipped, The said return path 32 for bathtubs is the said heat for memory A bathtub return inner pipe 32a provided in the casing 39 of the heat source machine G while being connected to the exchanger 28, and a bathtub return provided outside the casing 39 of the heat source machine G while being connected to the circulation adapter 30 It is comprised from the outer tube | pipe 32b.
The bathtub outward outer pipe 31b and the bathtub return outer pipe 32b correspond to the bathtub hot water pipe P.

  A tubular forward connecting portion 47 having a female screw formed on the outer peripheral portion is attached to an end of the bathtub forward inner tube 31a opposite to the side of the heat exchanger for remedy, and the bathtub return inner tube A cylindrical return connection portion 48 having a female screw formed on the outer peripheral portion is attached to an end portion on the opposite side to the side of the heat exchanger for tracking in 32a, and the forward connection portion 47 and the return connection portion are provided. The portion 48 is attached to the casing 39 so as to protrude outward.

As shown in FIGS. 1 and 2, a cap nut 49 and a cap nut 50 are rotatably supported at the end of the bathtub outer pipe 31b on the heat source unit side and at the end of the bathtub side, respectively.
Then, the cap nut 49 on the heat source unit side of the bathtub outer pipe 31b is screwed into the connecting port 47 for the heat source G, and the bag nut 50 on the bathtub side is connected to the connecting port 30f for the circulation adapter 30. The bathtub outer pipe 31 b is connected to the heat source machine G and the circulation adapter 30.

As shown in FIG.1 and FIG.2, the heat source machine side connection part 61 and the hot water pipe side connection part 62 for bathtubs are internally installed in the edge part by the side of the heat source machine in the bathtub return outer pipe 32b as the said hot water pipe P for bathtubs. A heat source machine side joint 60 provided in a state of communicating with the passage 63 (see FIG. 3 and FIG. 5) is provided, and the bathtub side connecting portion 71 and the bathtub are provided at the bathtub side end of the bathtub return outer pipe 32b. A bathtub-side joint 70 is provided for communicating with the hot water pipe-side connecting portion 72 through an internal passage 73 (see FIGS. 4 and 5).
As shown in FIG. 1 to FIG. 3 and FIG. 5, the internal passage 63 is provided in a side wall portion between the heat source device side connection portion 61 and the hot water pipe side connection portion 62 for the bathtub in the heat source device side joint 60. A drain drain pipe insertion portion 64 communicating with the outside is provided, and the drain drain pipe insertion portion 64 is provided with a sealing member 65 that seals the drain drain pipe 4 in a watertight manner in a state where the drain drain pipe 4 is inserted.
As shown in FIG. 1, FIG. 2, FIG. 4 and FIG. 5, the internal passage 73 is formed in a side wall portion between the bathtub side connection portion 71 and the bathtub hot water pipe side connection portion 72 in the bathtub side joint 70. A drain drain pipe insertion portion 74 that communicates with the drain drain pipe 4 is provided. The drain drain pipe insertion portion 74 is provided with a sealing member 75 that seals the drain drain pipe 4 in a watertight manner.
As shown in FIGS. 1, 2, and 5, the drain drain pipe 4 has an end on the heat source unit side projecting outside from the drain drain pipe insertion portion 64 of the heat source unit side joint 60 and on the bathtub side. The end portion is provided so as to be located in the bathtub return outer pipe 32b in a state of protruding outward from the drain drain pipe insertion portion 74 of the bathtub side joint 70.

Incidentally, FIG. 3 is a diagram showing a detailed configuration of the heat source unit side joint 6, and FIG. 4 is a diagram showing a detailed configuration of the bathtub side joint 70. FIG. 5 is a diagram showing the detailed configuration of each of the heat source apparatus side joint 6 and the bathtub side joint 70 in a state where the drain drain pipe 4 is inserted.
In addition, since the heat source machine side joint 60 and the bathtub side joint 70 are comprised similarly, in FIG. 5, the code | symbol which shows each part of the heat source machine side joint 60 and the bathtub side joint 70 is written together (tub side joint 70). The heat source machine side joint 60 and the bathtub side joint 70 are respectively shown using the same figure.

As shown in FIG. 3 to FIG. 5, the hot water pipe side connection parts 62 and 72 for bathtubs and the drain drain pipe insertion parts 64 and 74 are each configured in a cylindrical shape, and each cylinder axis is more than 90 °. The heat source machine side joint 60 and the bathtub side joint 70 are provided in a form that intersects at a large angle.
Further, the heat source machine side joint 60 and the bathtub side joint 70 are respectively connected to the drain drain pipe insertion portions 64 and 74 in the longitudinal direction of the internal passages 63 and 73 among the internal passage side ends. Drain drainage pipe guide portions 64a and 74a are provided in a state of extending into the internal passages 63 and 73 from a portion located on the side away from the bathtub hot water pipe side connection portions 62 and 72.

  Hereinafter, the heat source machine side joint 60 and the bathtub side joint 70 will be described. As described above, since the heat source machine side joint 60 and the bathtub side joint 70 are similarly configured, the heat source machine side joint 60 will be mainly described in detail, and the bathtub side joint 70 will be briefly described.

First, the heat source unit side joint 60 will be described with reference to FIGS. 3 and 5.
A joint main body 60M of the heat source machine side joint 60 includes a cylindrical heat source machine side connection part 61 on one end side, a cylindrical bathtub hot water pipe side connection part 62 on the other end side, and these heat source machine side connection parts. 61 and an internal passage 63 that communicates with the hot water pipe side connecting portion 62 for bathtubs are configured to be provided in a linearly continuous state.
The tubular bathtub hot water pipe side connecting part 62 is configured so that the bathtub return outer pipe 32b can be connected in an externally fitted state. The inner diameter of the bathtub hot water pipe side connecting part 62 is the drain drain pipe 4. Is configured to have a larger diameter than the outer diameter of the drainage pipe 4 so as to be inserted.
Moreover, the internal diameter of the internal channel | path 63 is comprised so that it may become larger than the internal diameter of the cylindrical heat source machine side connection part 61 and the internal diameter of the cylindrical hot water pipe side connection part 62 for bathtubs.
Incidentally, the bathtub return outer pipe 32b is constituted by a resin pipe having a size of 10A, for example, and the drain drain pipe 4 is constituted by a resin pipe having a size of 4A, for example.

A cap nut 66 that can be screwed into the return connecting portion 48 of the heat source machine G is rotatably supported on the heat source machine side connecting portion 61 of the joint main body 60M in the heat source side joint 60.
Further, on the outer peripheral portion of the hot water pipe side connecting portion 62 for the bathtub main body 60M in the heat source unit side joint 60, the distal end side of the connecting portion is arranged to prevent the bathtub return outer pipe 32b fitted on the outer peripheral portion. A plurality of step portions 62a having a small diameter are provided side by side in the longitudinal direction of the connecting portion.

The drain drain pipe insertion portion 64 is formed in a cylindrical shape, and the cylindrical drain drain pipe insertion portion 64 has a cylinder axis that intersects the cylinder axis of the bathtub hot water pipe side connection portion 62 at approximately 135 °. It is screwed into a hole formed in a side wall portion between the heat source machine side connection portion 61 and the hot water pipe side connection portion 62 for the bathtub in the joint body portion 60M in a form that intersects at an angle.
Both end surfaces of the drain drain pipe insertion portion 64 are configured to be surfaces orthogonal to the cylinder axis, and such a cylindrical drain drain pipe insertion portion 64 is screwed into the joint main body portion 60M as described above. In doing so, the portion close to the hot water pipe side connecting portion 62 for the bathtub in the inner passage side end portion of the drain drainage pipe insertion portion 64 is substantially in the same position as the inner surface of the internal passage 63, and the hot water pipe for the bathtub A portion far from the side connecting portion 62 is screwed in such a manner that it projects into the internal passage 63 to a position corresponding to the axis of the internal passage 63.
That is, in the form in which the cylindrical hot water pipe side connection part 62 and the cylindrical drain drain pipe insertion part 64 intersect the heat source machine side joint 60 at an angle larger than 90 °, respectively. Will be provided. Further, in a state where the drain drain pipe insertion portion 64 is screwed into the joint main body portion 60M of the heat source machine side joint 60, a portion protruding into the internal passage 63 in the drain drain pipe insertion portion 64 is the drain drain pipe. It is comprised so that it may function as the guide part 64a.

  The end portion on the inner side of the internal passage 63 on the side of the hot water pipe side connecting portion for the bathtub tapers in a state of gradually decreasing in diameter toward the hot water pipe side connecting portion for the bathtub. Is formed. When the drain drain pipe 4 is inserted into the bathtub hot water pipe side connecting portion 62 from the inner passage side at the tapered inner surface connected to the bathtub hot water pipe side connecting section 62 in the internal passage 63, drain drainage is performed. A drain drain pipe guide part 63a for guiding the tip of the pipe 4 to the bathtub hot water pipe side connecting part 62 is configured.

The sealing member 65 of the heat source unit side joint 60 includes an insertion hole 67a through which the drain drain pipe 4 can be inserted, and a cap nut screwed into the outer side end of the drain drain pipe insertion portion 64. 67 and an annular packing holding portion 64b formed in a step shape at the opening edge of the drain drainage pipe insertion portion 64, and is externally fitted to the drainage drainage pipe 4 inserted into the drain drainage pipe insertion portion 64. A ring-shaped packing 68 is provided.
Further, an annular puncturing pressing portion 67b protruding in the axial direction is provided at an opening edge on the inner side of the insertion hole 67a of the cap nut 67.
Then, when the drain nut 4 is screwed into the outer end of the drain drain pipe insertion portion 64 in a state where the drain drain pipe 4 is inserted into the insertion hole 67a of the cap nut 67 and the drain drain pipe insertion portion 64, the screw Along with this, the puncturing holding portion 67b of the cap nut 67 presses the packing 68 fitted on the drain drain pipe 4, and the packing 68 is applied to the outer periphery of the drain drain pipe 4 over the entire circumference. As a result, the drain drain pipe insertion portion 64 is sealed in a watertight manner.

Next, the said bathtub side coupling 70 is demonstrated based on FIG.4 and FIG.5.
The joint main body portion 70M of the bathtub side joint 70 includes a cylindrical bathtub side connection portion 71 on one end side, a cylindrical bathtub hot water pipe side connection portion 72 on the other end side, the heat source unit side connection portion 71, and the like. It is comprised so that the internal channel | path 73 which connects the hot water pipe side connection part 72 for bathtubs may be provided in the state connected in a linear form.

A cap nut 76 that can be screwed into the return connection portion 30b of the circulation adapter 30 is rotatably supported on the bathtub side connection portion 71 of the joint main body portion 70M of the bathtub side joint 70.
Further, the outer diameter of the bathtub main water pipe side connecting portion 72 of the joint main body portion 70M in the bathtub side joint 70 has a smaller diameter toward the distal end side of the connecting portion in order to prevent the bathtub return outer pipe 32b fitted on the outer peripheral portion. A plurality of stepped portions 72a are arranged in the longitudinal direction of the connecting portion.

  The drain drain pipe insertion portion 64 of the heat source side joint 60 is screwed into the joint main body portion 60M, and the drain drain pipe insertion portion 74 of the bathtub side joint 70 is in the joint main body portion 70M. A tubular bathtub hot water pipe side connection is made to the bathtub side joint 70 by being screwed into a hole formed in a side wall portion between the bathtub side connecting part 71 and the bathtub hot water pipe side connecting part 72. The part 72 and the cylindrical drainage pipe insertion part 74 are provided in a form in which the respective cylinder axis intersects at an angle larger than 90 °. Further, in a state where the drain drain pipe insertion portion 74 is screwed into the joint main body portion 70M of the bathtub side joint 70, a portion protruding into the internal passage 73 in the drain drain pipe insertion portion 74 is the drain drain pipe guide. The unit 74a is configured to function.

  The end portion on the hot water pipe side connecting portion side of the bathtub on the inner surface of the internal passage 73 also has a gradually decreasing diameter toward the hot water pipe side connecting portion side of the bathtub, similarly to the heat source machine side joint 60. When the drain drain pipe 4 is inserted into the bathtub hot water pipe side connecting portion 72 from the inner passage side, the drain drain pipe 4 is formed in a tapered shape continuous to the hot water pipe side connecting section 72. The drain drainage pipe guide part 73a which guides the front-end | tip to the hot water pipe side connection part 72 for bathtubs is comprised.

The sealing member 75 of the heat source unit side joint 70 includes an insertion hole 77a through which the drain drain pipe 4 can be inserted, and a cap nut screwed into the outer side end of the drain drain pipe insertion portion 74. 77 and an annular packing holding portion 74b formed in a step shape at the opening edge of the drain drainage pipe insertion portion 74, and is externally fitted to the drain drainage pipe 4 inserted into the drain drainage pipe insertion portion 74. A ring-shaped packing 78 is provided.
Further, an annular puncturing presser 77b protruding in the axial direction is provided at the opening edge on the inner side of the insertion hole 77a of the cap nut 77.
When the drain nut 4 is inserted into the insertion hole 77a of the cap nut 77 and the drain drain pipe insertion portion 74 and the cap nut 77 is screwed to the outer end of the drain drain pipe insertion portion 74, the packing 78 Is pressed to the outer peripheral portion of the drain drain pipe 4 over the entire circumference thereof, and the drain drain pipe insertion portion 74 is sealed in a watertight manner.

Hereinafter, an operation procedure for piping the bathtub outward outer pipe 31b, the bathtub return outer pipe 32b, and the drain drain pipe 4 will be described.
The bathtub outward outer pipe 31b and the bathtub return outer pipe 32b are laid under the floor in a state where they are put in the sheath pipe 51 (see FIGS. 2 and 6).
As shown in FIG. 2, the cap nut 49 on the heat source device side of the bathtub outer pipe 31 b is screwed into the connecting portion 47 for the heat source device G, and the bag nut 50 on the bathtub side is connected to the circulation adapter 30. The bathtub connecting outer pipe 31b is connected to the heat source device G and the circulation adapter 30 by screwing into the connecting portion 30f.

  Subsequently, as shown in FIG. 3, the end of the bathtub return outer pipe 32 b on the heat source machine side is externally fitted to the bathtub hot water pipe side connection part 62 of the heat source machine side joint 60, and the band member 52 (FIG. 2 and FIG. 5), and the end of the bathtub return outer pipe 32b on the bathtub side is fitted on the bathtub hot water pipe side connection part 72 of the bathtub side joint 70 and tightened with the band member 52 as shown in FIG. .

  Subsequently, as shown in FIG. 3 and FIG. 4, the drain drain pipe 4 is inserted into the insertion hole 67 a of the cap nut 67 in the sealing member 65 of the heat source machine side joint 60, and the heat source machine side joint 60. It is inserted into the internal passage 63 of the heat source machine side joint 60 from the drain drain pipe insertion part 64, and further, the drain drain pipe 4 is pushed in first, thereby allowing the hot water pipe side connection part 62 for the bathtub of the heat source machine side joint 60 to pass. The bathtub return outer pipe 32b externally fitted to the bathtub hot water pipe side connecting portion 62 and passing through the bathtub return outer pipe 32b, and further pushing the drain drain pipe 4 first, The hot water pipe side connection part 72 for bathtubs of the joint 70 is passed, and the drain drain pipe insertion part 74 of the bathtub side joint 70 is inserted from the internal passage side, and is protruded outside from the drain drain pipe insertion part 74. Of the drainage pipe 4 Inserted into the insertion hole 77a of the cap nut 77 in the sealing member 75 of the tub-side joint 70 parts out.

Thus, when the drain drain pipe 4 is inserted into the hot water pipe side connecting part 62 for the bathtub of the heat source unit side joint 60 from the internal passage side, the tip of the drain drain pipe 4 hits the drain drain pipe guide part 63a and the drain drain pipe. Guided by the guide 63a, it is guided to the opening on the internal passage side of the hot water pipe side connecting part 62 for the bathtub, and the drain drain pipe 4 can be easily inserted into the hot water pipe side connecting part 62 for the bathtub.
Further, when the drain drain pipe 4 is inserted into the drain drain pipe insertion portion 74 of the bathtub side joint 70 from the inner passage side thereof, the tip of the drain drain pipe 4 hits the drain drain pipe guide portion 74a and the drain drain pipe guide portion 74a. The guide is led to the opening on the internal passage side of the drain drain pipe insertion portion 74, and the drain drain pipe 4 is easily inserted into the drain drain pipe insertion portion 75.

Subsequently, as shown in FIG. 5, the cap nut 66 supported by the heat source unit side connection 61 of the heat source unit side joint 60 is screwed into the return connection unit 48 of the heat source unit G, and the bathtub of the bathtub side joint 70 is assembled. The cap nut 76 supported by the side connection portion 71 is screwed into the return connection portion 30b of the circulation adapter 30 to connect the bathtub return outer pipe 32b to the heat source device G and the circulation adapter 30.
Further, by screwing the cap nut 67 of the sealing member 65 of the heat source machine side joint 60 to the outer end of the drain drain pipe insertion part 64 of the heat source machine side joint 60, the drain drain pipe insertion part 64 is connected. Sealing in a watertight manner and screwing the cap nut 77 in the sealing member 75 of the bathtub side joint 70 into the outer end of the drain drain pipe insertion part 74 of the bathtub side joint 70, the drain drain pipe is inserted. The portion 74 is sealed in a watertight manner.

Hereinafter, the control operation of the operation control device C will be described.
The operation control device C is configured to be able to communicate with the main remote controller R1 and the bathroom remote controller R2.
As shown in FIG. 1, the main remote controller R1 and the bathroom remote controller R2 (only the main remote controller R1 is shown) have an operation switch 81 for instructing start and stop of operation, an automatic bath switch 82 for instructing automatic bath operation, Hot water supply temperature setting switch 83 for setting the general hot water supply temperature, bathtub temperature setting switch 84 for setting the target temperature in the bathtub Y, water level setting switch 85 for setting the target water level in the bathtub Y, and additional hot water supply to the bathtub A hot water switch 86, a chasing switch 87 for commanding chasing operation, a display unit 88 for displaying various information such as a set temperature, and the like are provided.

  The operation control device C is in a controllable state when the operation switch 81 is operated, and performs a general hot water supply operation in which hot water is supplied from the hot water tap 2 when the hot water tap 2 is opened. The operation control device C executes an automatic bath operation when the bath automatic switch 82 is operated, performs an additional bath operation when the add hot water switch 86 is operated, and adds an additional bath when the remedy switch 87 is operated. A dredging operation is performed, and when the upper limit detector 91a of the drain amount detection sensor 91 detects that the drain amount stored in the drain tank 8 is equal to or greater than the upper limit storage amount, the drain drain operation is performed.

  In the general hot water supply operation, when the hot water tap 2 is opened and the amount of water detected by the water amount sensor 14 exceeds a predetermined amount, the combustion fan 12 in the hot water supply operation unit A is driven, and then the intermittent valve 11 is opened to igniter. The burner g1 is ignited, and the detected temperature of the hot water supply thermistor 18 is determined based on the temperature set by the hot water supply temperature setting switch 83, the detected water amount of the water amount sensor 14, the detected water temperature of the hot water thermistor 13, the detected temperature of the hot water thermistor 18, etc. The opening degree of the gas proportional valve 10 and the opening degree of the mixing valve 17 are adjusted so that the temperature is set by the hot water supply temperature setting switch 83. When water flow is no longer detected by the water amount sensor 14, the intermittent valve 11 is closed to stop the combustion of the burner g1, and the combustion fan 12 is also stopped to end the general hot water supply operation.

In the bath automatic operation, first, a hot water filling operation is executed. In this hot water filling operation, the hot water solenoid valve 42 is opened to start supplying hot water to the bathtub Y, and the burner g1 is ignited by the bathtub temperature setting switch 84 in the same manner as in the general hot water supply operation described above. Based on the set temperature, the amount of water detected by the water amount sensor 14, the detected water temperature of the water supply thermistor 13, the detected temperature of the hot water supply thermistor 18, etc., the gas so that the detected temperature of the hot water thermistor 18 becomes the set temperature by the bathtub temperature setting switch 84. When the opening degree of the proportional valve 10 and the opening degree of the mixing valve 17 are adjusted and the detected water level of the water level sensor 34 becomes equal to or higher than the set water level set by the water level setting switch 85, the combustion of the burner g1 is stopped and the hot water electromagnetic The valve 42 is closed to end the hot water filling operation.
In this hot water filling operation, hot water is supplied to the bathtub Y through both the bathtub return path 32 and the bathtub return path 31 as described above.

When the hot water filling operation is completed in the bath automatic operation, if the temperature detected by the bath return temperature thermistor 35 is lower than the temperature set by the bath temperature setting switch 84, the chasing operation is executed. In this memorial operation, the hot water circulation pump 24 and the memorial circulation pump 33 are operated in a state where the terminal thermal valve 26 is closed and the memorial heat valve 29 is opened. The hot water is circulated through the bathtub return path 32 and the bathtub forward path 31 to drive the combustion fan 12 in the hot water circulation operation section B, and then the intermittent valve 11 is opened and the burner g2 is ignited by the igniter. The opening degree of the gas proportional valve 10 is adjusted so that the detected temperature of the bathtub going-out temperature thermistor 38 becomes a set hot water temperature (for example, 60 ° C.), and the detected temperature of the bathtub return temperature thermistor 35 is set to the bathtub temperature. When the temperature set by the switch 84 is reached, the intermittent valve 11 is closed, the combustion of the burner g2 is stopped, the combustion fan 12 is stopped, and the chasing operation is ended.
Subsequently, keep operation is executed for a set time. In this keep operation, the temperature of the hot water in the bathtub Y becomes the set temperature by the bathtub temperature setting switch 84 and the water level in the bathtub Y becomes the set water level set by the water level setting switch 85. Perform memorial operation.

In the addition hot water operation, the hot water operation is executed as described above so that the water level detected by the water level sensor 34 is equal to or higher than the water level set by the water level setting switch 85.
Since the control operation in the chasing operation when the chasing switch 87 is operated is the same as the control operation in the chasing operation in the hot water operation described above, the description thereof is omitted.

  In the drain drainage operation, the drain drainage pump 9 is operated until it is detected by the lower limit detection unit 91b of the drain amount detection sensor 91 that the drain amount in the drain tank 8 is equal to or less than the lower limit storage amount. When this drain drain operation is executed, the drain in the drain tank 8 is led to the drain D of the bathroom through the drain drain pipe 4 and discharged, and the drain amount in the drain tank 8 becomes less than the lower limit storage amount. Become.

  The bath facility is provided with leakage detection means S for detecting an abnormal leakage state in which drain leaks from the drain drain pipe 4 into the bathtub return outer pipe 32b. Next, the leakage detection means S will be described. .

  As shown in FIG. 7, the leak detection means S includes a hot water electrode 92 provided so as to be electrically connected to hot water filling the inside of the bathtub return outer pipe 32 b, and the inside of the drain drain pipe 4. A drain electrode 93 provided so as to be electrically connected to a drain filled with water, a continuity measuring unit 94 as a continuity measuring means for detecting continuity between the hot water electrode 92 and the drain electrode 93, and When the continuity is detected by the continuity measuring unit 94 in a state where the inside of the hot water pipe P for bathtubs is filled with hot water and the inside of the drain drain pipe 4 is filled with drain, it is determined that the leakage is abnormal. And a discriminating unit 95 as discriminating means.

The continuity measuring unit 94 and the discriminating unit 95 are provided in the operation control device C. In addition to the continuity measuring unit 94 and the discriminating unit 95, the operation control device C includes various types such as the above-described general hot water supply operation and bath automatic operation. An operation control unit 96 that performs operation is provided.
The hot water electrode 92 is provided near the end of the bathtub return inner pipe 32a opposite to the side of the additional heat exchanger so as to be electrically connected to the hot water filling the bathtub return outer pipe 32b. The drain electrode 93 is provided in the drain tank 8 so as to be electrically connected to the drain filling the drain drain pipe 4, and each of the hot water electrode 92 and the drain electrode 93 is a lead wire. And connected to the continuity measuring unit 94 of the operation control device C.

And the discrimination | determination part 95 fills the inside of the bathtub return outer pipe | tube 32b with hot water in the state which is more than the preset water level for hot water filling filled with the detection level of the water level sensor 34, and is driving the drain drainage pump 9. In addition, it is determined that the inside of the drain drain pipe 4 is filled with drain, and the continuity between the hot water electrode 92 and the drain electrode 93 is detected by the continuity measuring unit 94. Then, it is configured to determine that it is a leakage abnormal state.
When the determining unit 95 determines that the inside of the bathtub return outer pipe 32b is filled with hot water and the inside of the drain drain pipe 4 is filled with drain, the continuity measuring unit 94 is determined. Then, a voltage is applied between the hot water electrode 92 and the drain electrode 93, and the continuity measuring unit 94 detects whether or not the hot water electrode 92 and the drain electrode 93 are conductive.
When the continuity measuring unit 94 detects continuity between the hot water electrode 92 and the drain electrode 93, the operation control unit 96 stops the drain drain pump 9 and causes the display unit 88 to be in a leakage abnormal state. Display that there is.

That is, when the detected water level of the water level sensor 34 is equal to or higher than the preset water level for hot water filling and the drain drain pump 9 is driven, a voltage is applied between the hot water electrode 92 and the drain electrode 93. When the continuity measurement unit 94 detects the continuity between the hot water electrode 92 and the drain electrode 93, the drain drain pump 9 is stopped and the display unit 88 displays a leakage abnormal state. .
Incidentally, when continuity between the hot water electrode 92 and the drain electrode 93 is detected by the continuity measuring unit 94, if the burner g1 is in the combustion state, it is stopped, and the hot water solenoid valve 42 is in the open state. If there is, close the valve.

[Second Embodiment]
Hereinafter, a second embodiment according to the present invention will be described with reference to the drawings. Since the second embodiment is the same as the first embodiment except for the configuration of the leakage detection means S, the first embodiment is described. The same components as those in the embodiment and the components having the same action are denoted by the same reference numerals, and the description thereof is omitted. Mainly, the configurations different from the first embodiment will be described.

  As shown in FIG. 8, the leak detection means S is configured such that the drain amount detection sensor 91 for detecting the drain amount stored in the drain tank 8 and the hot water pipe P for bathtub are filled with hot water. The drain drain pump 9 is operated in a normal conveying state so as to discharge the drain stored in the drain tank 8, and then the drain drain pump 9 causes the fluid in the drain drain pipe 4 to flow. Discrimination as a discriminating means for discriminating that the leakage is abnormal when the drain amount detection sensor 91 detects an increase in the drain amount when operated in the reverse conveyance state so as to convey into the drain tank 8. Part 95.

The drain drainage pump 9 is a normal conveyance state in which the drain stored in the drain tank 8 is discharged to D through the drain drainage pipe 4 to the drainage point, and the reverse conveyance in which the fluid in the drain drainage pipe 4 is conveyed into the drain tank 8. It is configured to be operable in a state.
Further, the determination unit 95 is provided in the operation control device C. In addition to the determination unit 95, the operation control unit C performs an operation control unit 96 that performs various operations such as the general hot water supply operation and the bath automatic operation described above. Is provided.

And when the discrimination | determination part 95 complete | finishes drain drain operation, if the detection water level of the water level sensor 34 is more than the preset water level for hot water filling, the inside of the bathtub return outer pipe 32b will be filled with hot water. When the drain drain pump 9 is operating in the reverse conveyance state, when the lower limit detection unit 91b detects that the drain amount in the drain tank 8 is equal to or greater than the lower limit storage amount. It is determined that there is a leakage abnormal state.
When the operation control unit 96 ends the drain drain operation, if the determination unit 95 determines that the inside of the bathtub return outer pipe 32b is filled with hot water, the drain drain operation ends. Even after (after the lower limit detecting unit 91b detects that the drain amount in the drain tank 8 is equal to or less than the lower limit storage amount), the drain drain pump is used while the extended set time elapses after the drain drain operation ends. 9 is continuously operated in the forward conveyance state, and thereafter, the drain drain pump 9 is operated in the reverse conveyance state while the set time for reverse rotation elapses. Moreover, if the determination part 95 discriminate | determines that it is a leakage abnormal state, the operation control part 96 will display that it is a leakage abnormal state on the display part 88. FIG.

That is, when the drain drain operation is finished, if the detected water level of the water level sensor 34 is equal to or higher than the preset water level for hot water filling, the drain drain operation is completed after the drain drain operation is finished. While the set time elapses, the drain drain pump 9 is continuously operated in the forward conveyance state, the drain in the drain drain pipe 4 is discharged to the drainage point D, and then the reverse set time elapses. The drain drain pump 9 is operated in the reverse conveyance state. When the drain drain pump 9 is operated in the reverse conveyance state, if the drain amount in the drain tank 8 is detected to be greater than or equal to the lower limit storage amount by the lower limit detection unit 91b, the leakage to the display unit 88 occurs. Display the abnormal state.
Incidentally, when the drain drain pump 9 is operated in the reverse conveyance state, and the lower limit detection unit 91b detects that the drain amount in the drain tank 8 is equal to or higher than the lower limit storage amount, the burner g1 is in the combustion state. If the hot water solenoid valve 42 is in the open state, it is closed.

[Third Embodiment]
Hereinafter, a third embodiment according to the present invention will be described with reference to the drawings. However, the third embodiment is the same as the first and second embodiments except that the configuration of the leakage detection means S is different. The same constituent elements as those in the first and second embodiments and the constituent elements having the same functions are denoted by the same reference numerals, and the description thereof is omitted. Mainly, the configurations different from those in the first and second embodiments will be described.

As shown in FIG. 9, the leakage detection means S detects the pressure of hot water in a state where the bathtub return outer pipe 32b is filled with hot water, and hot water is supplied to the bathtub return outer pipe 32b. When the drain drain pump 9 is operated in a state where the drain fill pipe 4 is filled, and the drain drain pipe 4 is filled with drain, the water pressure sensor 34 controls the pressure. When a rise is detected, it comprises a discrimination unit 95 as discrimination means for discriminating that the leakage is abnormal.
Further, the determination unit 95 is provided in the operation control device C. In addition to the determination unit 95, the operation control unit C performs an operation control unit 96 that performs various operations such as the general hot water supply operation and the bath automatic operation described above. Is provided.

In the state where the detection water level of the water level sensor 34 is equal to or higher than a preset water level for hot water filling and the drain drain pump 9 is driven, the determination unit 95 is filled with hot water in the bathtub return outer pipe 32b. It is determined that the inside of the drain drain pipe 4 is filled with drain, and when it is determined in this way, the hot water solenoid valve 42 is closed and the supplementary circulation pump 33 is stopped. When the detected water level of the water level sensor 34 rises in the state where the water level is detected, it is determined that the leakage is abnormal.
If it is determined by the determination unit 95 that the leakage is abnormal, the operation control unit 96 stops the drain drain pump 9 and displays on the display unit 88 that the leakage is abnormal.

That is, the water level detected by the water level sensor 34 is equal to or higher than the preset water level for hot water filling and the drain drain pump 9 is being driven, the hot water solenoid valve 42 is closed, and the circulation for supplementary cooking is performed. When the detected water level of the water level sensor 34 rises in the state where the pump 33 is stopped, the drain drain pump 9 is stopped, and the display unit 88 displays a leakage abnormality state.
Incidentally, when the detected water level of the water level sensor 34 rises as described above, the burner g1 is stopped if it is in a combustion state, and is closed if the hot water solenoid valve 42 is in an open state.

[Fourth Embodiment]
Hereinafter, the fourth embodiment according to the present invention will be described with reference to the drawings. Since the fourth embodiment is the same as the first to third embodiments except that the configuration of the leakage detection means S is different, The same constituent elements as those in the first to third embodiments and the constituent elements having the same functions are denoted by the same reference numerals, and the description thereof is omitted. Mainly, the configurations different from those in the first to third embodiments will be described.

As shown in FIG. 10, the leakage detection means S stores the drain amount detection sensor 91 that detects the amount of drain stored in the drain tank 8 and the drain drain pump 9 in the drain tank 8. If the time required for the drain amount detection sensor 91 to detect that the drain amount has decreased is set time shorter than the set reference time, the leakage abnormality is detected. It is comprised from the discrimination | determination part 95 as a discrimination means which discriminate | determines that it is in a state.
Further, the determination unit 95 is provided in the operation control device C. In addition to the determination unit 95, the operation control unit C performs an operation control unit 96 that performs various operations such as the general hot water supply operation and the bath automatic operation described above. Is provided.

The operation control unit 96 executes the drain discharge operation in advance, that is, the time required for the drain discharge operation, that is, by operating the drain drain pump 9, the upper limit detection unit 91b causes the drain amount in the drain tank 8 to be reduced. The reference time is set from the state in which it is detected that the amount is greater than or equal to the upper limit storage amount until the lower limit detection unit 91b detects that the drain amount in the drain tank 8 is less than or equal to the lower limit storage amount. Remember as time. Further, when the determination unit 95 determines that the leakage is abnormal, the operation control unit 96 displays on the display unit 88 that the leakage is abnormal.
When the drain drain operation after the set reference time is stored as described above is executed as described above, the determination unit 95 is in a leakage abnormality state when the time required for the drain drain operation becomes shorter than the set reference time. Is determined.

That is, when the drain discharge operation is executed in advance and the time required for the drain discharge operation is stored as the set reference time, and the subsequent drain drain operation is executed, the time required for the drain drain operation is more than the set reference time. If the set time is shorter, the display unit 88 displays a leakage abnormal state.
By the way, when the time required for the drain drain operation becomes shorter than the set reference time, the burner g1 is stopped if it is in a combustion state, and is closed if the hot water solenoid valve 42 is open.

[Another embodiment]
Next, another embodiment will be described.
(B) In the first to fourth embodiments, the drain drainage pipe insertion method for the bath equipment piping structure is adapted to the case of newly installing the bath equipment, but the drain drainage pipe insertion method for the bath equipment piping structure is used. It can also be applied to existing bath facilities.

(B) In the first to fourth embodiments, the drain drain pipe is piped through the inside of the bathtub return outer pipe 32b among the bath outer pipe 31b and the bathtub return outer pipe 32b as the bathtub hot water pipe P. The drain drain pipe may be piped through the inside of the bathtub outer pipe 31b. That is, in the double-fed hot water supply type in which hot water is supplied to the bathtub Y through both the bathtub outer pipe 31b and the bathtub return outer pipe 32b, Although the drain pipe 4 is piped through the inside of the bathtub return outer pipe 32b, the drain drain pipe 4 may be piped through the inside of the bathtub going-out outer pipe 31b. By the way, in the single-feed hot water supply type in which hot and cold water is supplied to the bathtub Y only through the bathtub outer pipe 31b, the drain drain pipe 4 is piped through the inside of the bathtub outer pipe 31b.

(C) In the first embodiment, the hot water electrode 92 is provided near the end of the bathtub return inner pipe 32a opposite to the side of the heat exchanger for cooking, but the hot water electrode 92 is outside the bathtub return. What is necessary is just to provide so that the hot water which fills the inside of the pipe | tube 32b may be electrically connected, for example, the hot water electrode 92 may be provided in the bathtub return outer pipe | tube 32b and the heat source machine side coupling 60.
Further, in the first embodiment, the drain electrode 93 is provided in the drain tank 8, but the drain electrode 93 may be provided so as to be electrically connected to the drain filling the drain drain pipe 4. For example, the drain electrode 93 may be provided in the drain drain pipe 4.

(D) In the second embodiment, in the state where the inside of the hot water pipe P for bathtubs is filled with hot water, the drain drain pump 9 is in the normal transport state so as to discharge the drain stored in the drain tank 8. When the drain drain pump 9 is operated in a reverse transport state so as to transport the fluid in the drain drain pipe 4 into the drain tank 8, the drain amount detection sensor 91 increases the drain amount. However, in the state where the hot water pipe P for the bathtub is filled with hot water, the drain drain pump 9 is simply connected to the drain drain pipe 4 in the drain drain pipe 4. When operating in the reverse conveyance state so as to convey the fluid into the drain tank 8, it is determined that a leakage abnormality state is detected when an increase in the drain amount is detected by the drain amount detection sensor 91. Also good.
Incidentally, the increase in the drain amount in this case is, for example, an increase larger than the increase when the drain drain pump is operated in the reverse conveyance state in a state where the drain drain pipe is filled.

(E) In the fourth embodiment, when the drain drain pump 9 is operated so as to discharge the drain stored in the drain tank 8, the drain amount is reduced by the set amount by the drain amount detection sensor 91. When the set time is shorter than the set reference time, it is determined that the leakage is abnormal, but the drain drain pump 9 discharges the drain stored in the drain tank 8. If the time required for the drain amount detection sensor 91 to detect that the drain amount has decreased is set longer than the set reference time, it is determined that there is a leakage abnormality state. You may comprise.
That is, in the abnormal leakage state, when the drain drain pump 9 is operated and the inside of the drain drain pipe 4 is at a positive pressure with respect to the hot water pipe P for bathtubs, the pressure loss becomes small. Although the time required to detect that the drain amount has decreased by the amount of time is shortened, the drain drain pipe 4 is in the bathtub hot water pipe P in the state where the drain drain pump 9 is operated in the leakage abnormal state. On the other hand, when the pressure is negative, the pressure loss increases, and therefore the time required for the drain amount detection sensor 91 to detect that the drain amount has decreased by a set amount is lengthened.
In short, when the drain drain pump 9 is operated so as to discharge the drain stored in the drain tank 8, the drain amount detection sensor 91 sets the drain amount according to the state of the hot water supply means 42 and the like. A configuration may be adopted in which it is determined that the leakage is abnormal when the time required to detect the decrease is longer than the set reference time or shorter than the set time.

(F) In the fourth embodiment, the drain discharge operation is executed in advance and the time required for the drain discharge operation is set as the set reference time. However, the time input means capable of setting the set reference time. And the setting reference time may be set by the time input means.

(G) In the first to third embodiments, when the detected water level of the water level sensor 34 is equal to or higher than the preset hot water filling level, the inside of the bathtub return outer pipe 32b is filled with hot water. However, when the hot water solenoid valve 42 is in the open state (the hot water supply means is in a supply state), it is determined that the inside of the bathtub return outer pipe 32b is filled with hot water. Also good.
In addition, the water level sensor 34 is used as hot water filling detection means for detecting whether or not the inside of the bathtub return outer pipe 32b is filled with hot water, but the hot water filling detection means is provided separately from the water level sensor 34. May be.

(H) In the first and third embodiments, when the drain drain pump 9 (drain drain means) is being driven, the inside of the drain drain pipe 4 is filled with drain. The drain drainage pipe 4 is provided based on the detection information of the drain fullness detection means provided with the drain fullness detection means for detecting whether or not the inside of the drain drainage pipe 4 is filled with drain. You may comprise so that it may discriminate | determine that the inside of is filled with drain.

(Li) In the first to fourth embodiments, when it is determined that the leakage is abnormal, the drain draining means 9 is stopped and the notification means is activated. , It is not necessary to perform either one or both of the stop of the drain drain means 9 and the operation of the notification means.
By the way, the notification means is activated and the display unit 88 displays that the leakage is abnormal, but the notification lamp may be turned on or the notification buzzer may be sounded.

(Nu) In the first to fourth embodiments, the drain amount detection sensor 91 is in a state where the drain amount in the drain tank 8 is equal to or higher than the upper limit storage amount, and the drain amount in the drain tank 8 is equal to or lower than the lower limit storage amount. Although the three states of the state and the state in which the drain amount in the drain tank 8 is equal to or less than the upper limit storage amount and equal to or greater than the lower limit storage amount are configured to be detectable, it may be configured to be capable of detecting four or more states.
By configuring in this way, for example, in the second embodiment, when the drain drain pump 9 is operated in the reverse conveyance state, the leakage detection storage amount equal to or more than the lower limit storage amount different from the lower limit storage amount. If it is detected that the leakage is abnormal, it can be determined that the leakage is abnormal. In the fourth embodiment, the set amount is different from the drain amount discharged in the drain discharge operation. It can be.

The block diagram which shows the whole structure of the bath equipment which concerns on 1st Embodiment. Schematic which shows the whole structure of the bath equipment which concerns on 1st Embodiment. Sectional drawing which shows the structure of the heat source machine side coupling which concerns on 1st Embodiment. Sectional drawing which shows the structure of the bathtub side coupling which concerns on 1st Embodiment. Sectional drawing which shows the structure of the heat source machine side coupling and bathtub side coupling which concern on 1st Embodiment. Diagram showing piping structure using sheath tube Block diagram showing leakage detection means according to the first embodiment Block diagram showing leakage detection means according to the second embodiment Block diagram showing leakage detection means according to the third embodiment Block diagram showing leakage detection means according to the fourth embodiment

Explanation of symbols

4 Drain drainage pipe 8 Drain tank 9 Drain drainage means 34 Water level sensor 42 Hot water supply means 60 Heat source machine side joint 61 Heat source machine side connection part 62 Bath hot water pipe side connection part 63 Internal passage 64 Drain drainage pipe insertion part 65 Sealing member 70 Bathtub side joint 71 Bathtub side connection part 72 Bathtub hot water pipe side connection part 73 Internal passage 74 Drain drainage pipe insertion part 91 Drain amount detection sensor 92 Hot water electrode 93 Drain electrode 94 Continuity measuring means 95 Discriminating means G Heat source machine N2 Heat exchanger P Bathtub hot water pipe S Leak detection means Y Bathtub

Claims (7)

Drain which is discharged from the heat exchanger and stored in a drain tank in a heat source device having hot water supply means for supplying hot water heated by a latent heat recovery type heat exchanger to a bathtub hot water pipe connected to the bathtub Is a bath facility provided with drain drainage means for supplying a drain drain pipe connected to a drainage point,
The drain drain pipe is piped through the bathtub hot water pipe,
A bath facility provided with leak detection means for detecting an abnormal leak state in which drain leaks from the drain drain pipe into the hot water pipe for bathtub. The leak detection means
An electrode for hot water provided so as to be electrically connected to hot water filling the hot water pipe for bathtub;
A drain electrode provided so as to be electrically connected to the drain filling the drain drain pipe;
Continuity measuring means for detecting continuity between the hot water electrode and the drain electrode;
Discrimination to determine that the leakage is abnormal when the continuity measuring means detects continuity in a state where the interior of the hot water pipe for bathtub is filled with hot water and the interior of the drain drain pipe is filled with drain. The bath facility according to claim 1, comprising means. The leak detection means
A drain amount detection sensor for detecting a drain amount stored in the drain tank;
In a state where the hot water pipe for the bathtub is filled with hot water, the drain draining means is operated in a reverse transport state so as to transport the fluid in the drain drain pipe into the drain tank. The bath facility according to claim 1, further comprising: a discriminating unit that discriminates that the leakage is abnormal when an increase in the drain amount is detected by an amount detection sensor.   In the state where the inside of the hot water pipe for the bathtub is filled with hot water after the determination means is operated in a normal transport state so as to discharge the drain stored in the drain tank, the drain draining means, When the drain drain means is operated in a reverse transport state so as to transport the fluid in the drain drain pipe into the drain tank, the leakage abnormality is detected when an increase in the drain amount is detected by the drain amount detection sensor. The bath facility according to claim 3, wherein the bath facility is configured to be determined to be in a state. The leak detection means
A water pressure sensor for detecting the pressure of the hot water in a state where the hot water pipe for the bathtub is filled with hot water,
In the state where the hot water pipe for the bathtub is filled with hot water, the hot water supply means is stopped, and the drain is filled in the drain drain pipe, when the drain drain means is operated, the water pressure sensor The bath facility according to claim 1, further comprising: discrimination means for discriminating that the leakage is abnormal when an increase in pressure is detected. The leak detection means
A drain amount detection sensor for detecting a drain amount stored in the drain tank;
Setting the time required for the drain amount detection sensor to detect that the drain amount has been reduced when the drain drain means is operated to discharge the drain stored in the drain tank. The bath facility according to claim 1, further comprising: a determination unit that determines that the leakage abnormality state occurs when a set time is shorter than a reference time. A heat source machine side joint provided at a heat source machine side end of the bathtub hot water pipe in a state where the heat source machine side connection part and the bathtub hot water pipe side connection part communicate with each other through an internal passage, and the bathtub A bathtub-side joint that connects the bathtub-side connection portion and the bathtub-use hot water pipe side connection portion in the internal passage is provided at the end of the hot water pipe on the bathtub side,
In the side wall portion between the heat source machine side connection part and the hot water pipe side connection part for the bathtub in the heat source machine side joint, a drain drain pipe insertion part communicating the internal passage to the outside is provided,
The drain drain pipe insertion portion is provided with a sealing member that seals in a watertight manner in a state where the drain drain pipe is inserted,
A drain drainage pipe insertion part that communicates the internal passage to the outside is provided on a side wall part between the bathtub side connection part and the hot water pipe side connection part for the bathtub in the bathtub side joint,
The drain drain pipe insertion portion is provided with a sealing member that seals in a watertight manner in a state where the drain drain pipe is inserted,
The drain pipe portion of the drain drain pipe has an end on the heat source machine side protruding outside from the drain drain pipe insertion part of the heat source machine side joint, and an end on the bathtub side is inserted into the drain drain pipe of the bathtub side joint. The bath facility according to any one of claims 1 to 6, wherein the bath facility is provided so as to be positioned in the hot water pipe for bathtubs in a state of protruding outward from the section.

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