JPH11257730A - Allways batheble bath device, and system of replacing water in that bath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a sanitory bath, by raising water replacement percentage of an always batheable bath. SOLUTION: A hot water delivery passage 12 is connected to the circulation passage 6 on discharge side of a circulation pump 3, and the connection part between the circulation passage 6 and the hot water delivery passage 12 is provided with a switching means 14. The switching means 14 has constitution of switching the flow between the water flow on circulation side where hot water in a bathtub is circulated through the circulation passage 6 and the water flow on hot water side where the hot water in a bathtub is delivered through the circulation passage 6 and the hot water delivery passage 12 in oorder. The outlet of the hot water delivery passage 12 is provided with a shower head 13, and a hot water delivery command means 15 is made at the shower head 13. When the hot water delivery command means 15 is operated and a hot water delivery command is issued, a controller 11 controls the switching means 14 to switch the flow, and clean hot water in bathtub having passed a dust removal means 7 and a sterilization means 10 is delivered from the shower head 13. Since the quantity of water used for shower in one time of bathing is about half the quantity of water in the bathtub, the water replacement parcentage improves rapidly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an always-bathable bath apparatus for keeping a bath at a temperature of a hot-water bath which can be always bathed, and a bath renewal system.

[0002]

2. Description of the Related Art FIG. 15 is a model diagram showing an example of a bath apparatus capable of always taking a bath. The always-bathable bath apparatus (hereinafter, referred to as a 24-hour bath apparatus) 1 is an apparatus capable of always keeping the temperature of a bath at a bathing water temperature at which a bath can be taken. The 24-hour bath apparatus 1 is provided with a circulation passage 6 for drawing hot water from the bathtub 2 from the suction port 4 by driving the circulation pump 3 and returning the hot water from the discharge port 5 to the bathtub 2 again. A garbage removing means 7, a heating means 8, and a sterilizing means 10 are interposed, and the bathtub hot water drawn into the circulation passage 6 is supplied to the garbage removing means 7 (for example, a filter or a filtration tank) to remove garbage such as hair and scale. Is removed and is kept warm by a heating means 8 (for example, an electric heater or a heat exchanger for heating water flow by the heat of burner combustion), and a sterilizing means 10 (for example, a sterilizing tank for sterilizing various bacteria such as Escherichia coli by ultraviolet rays). Is sterilized and returned to the bathtub.

Further, the circulation passage 6 is provided with a temperature detecting means (not shown) for detecting the temperature of hot water flowing through the passage 6 as a bath temperature. Further, the 24-hour bath apparatus 1 is provided with bath temperature setting means (not shown) for setting a bathing water temperature (for example, 40 ° C.).

Further, a control device 11 is built in the 24-hour bath apparatus 1, and the control device 11
The operation of the bath apparatus 1 for 24 hours is controlled. For example, the circulation pump 3 is driven to circulate the bath water through the circulation passage 6, and in such a state that the bath water is circulating,
When it is detected that the bath temperature detected by the temperature detecting means is lower than the bath water temperature set by the bath temperature setting means by a predetermined temperature (for example, 2 ° C.), the heating means is used. 8, circulation passage 6
To increase the temperature of the bath water. Thus, the operation of the apparatus is controlled to keep the bath at the temperature of the bath water.

[0005]

As described above, the circulating passage 6 is provided with the refuse removing means 7 and the sterilizing means 10 for removing and sterilizing the refuse in the bath water circulating in the circulating passage 6. Therefore, it is possible to bathe in sanitary hot water at any time without replacing the hot water in the bathtub 2 for a long time.

However, in order to maintain the bath in a more sanitary condition for a long period of time, hot water in the bathtub 2 is used, and water such as tap water is newly supplied to the bathtub 2 to newly supply the bathtub 2 with water. Improve the water exchange rate at which the hot and cold water in the bath is replaced (in this case, the ratio (Q / Qh) of the water amount Q supplied to the bathtub during a predetermined unit time to the predetermined bathwater amount Qh is defined as the water exchange rate). It is hoped that it will.

[0007] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a bath which can always be bathed, which can improve the rate of hot water exchange in a bathtub and maintain a more sanitary bath. It is an object of the present invention to provide an apparatus and a bath water replacement system.

[0008]

Means for Solving the Problems In order to achieve the above object, the present invention has the following structure to solve the above problems. That is, the first invention has a circulation passage which draws in hot water in the bathtub by driving a circulation pump and returns the hot water to the bathtub again, and a heating means for heating the bathtub hot water flowing through the circulation passage. In a constantly bathable bath apparatus in which the temperature of the bath is kept at a predetermined bath temperature by the heating means while circulating in the circulation passage, the circulation path on the discharge side of the circulation pump guides hot water to a predetermined hot water use location. The above object is achieved by a configuration in which a passage is connected and a switching means for switching between a circulation side water flow for circulating bathtub hot water through the circulation passage and a tapping side water flow for discharging bathtub hot water from the circulation passage through the tapping passage is provided. It is a means to solve.

A second aspect of the present invention is provided with the configuration of the first aspect of the present invention, and is provided with a tapping command means for manually issuing a tapping command, and detects that the tapping command is issued manually from the tapping command means. The above-mentioned problem is solved by a configuration in which a tapping control unit for switching the bathtub hot-water flow to the tapping-side water flow by the switching means is provided.

A third aspect of the present invention has the configuration of the first aspect, wherein the switching means is provided with a switching operation section for manually switching between a circulation side water flow and a tapping side water flow. It is a means to solve.

A fourth aspect of the present invention is directed to the first, second or third aspect.
In addition to the structure of the invention, the above problem is solved by a structure in which a refuse removing means for removing refuse in hot and cold water flowing in the passage is provided in a circulation passage portion upstream of a connection portion with the hot water passage. Means to do that.

A fifth invention is directed to the first, second, or third aspect.
Alternatively, in addition to the configuration of the fourth aspect, the above-described object is achieved by a configuration in which a sterilization unit that sterilizes hot and cold water flowing through the passage is provided in a circulation passage portion upstream of a connection portion with the hot water passage. Means.

According to a sixth aspect of the present invention, there is provided a means for solving the above-mentioned problem by a structure in which a shower head is attached to an outlet of a hot water passage which constitutes one of the first to fifth aspects of the invention.

According to a seventh aspect of the present invention, in addition to the configuration of any one of the first to sixth aspects of the present invention, the circulating pump when the flow of the bathtub hot water is switched to the circulation side water flow by the switching means is provided. The capacity data and the capacity data of the circulating pump when switching to the tap water flow are given in advance, and the capacity of the circulating pump is variably controlled based on the switching information of the switching means and the capacity data of each of the circulating pumps. The above-mentioned problem is solved by a configuration in which a pump drive control unit is provided.

According to an eighth aspect of the present invention, in addition to the configuration of any one of the first to seventh aspects of the present invention, a water level detecting means for detecting a bathtub water level; While detecting that the bathtub water level has dropped below the lower limit value of the predetermined bathing start allowable bathtub water level range based on the water level detecting means, the switching from the circulating water flow to the tapping water flow by the switching means is prevented. And a tapping prevention unit for preventing tap water from flowing out of the tapping passage.

According to a ninth aspect, in addition to the configuration of any one of the first to eighth aspects, the ninth aspect further includes a water level detecting means for detecting a bathtub water level, and the bathtub hot water flows out of the hot water passage. When the water level detecting means detects that the bath water level has dropped below the lower limit of a predetermined bath allowable bath water level range in which hot water can be discharged from the hot water passage, the bath water is forcibly discharged. A configuration in which a hot water supply forcible stop unit for terminating is provided as means for solving the above problem.

According to a tenth aspect of the present invention, there is provided a bath apparatus capable of constantly taking a bath according to the eighth aspect of the present invention; hot water supply means for supplying hot water to the bathtub; When it is detected that the switching to the tapping water flow is prevented, the tap water supply means supplies tap water to the bathtub to raise the bathtub water level to a water level not lower than the lower limit of the tapping allowable bathtub water level range, and then the tapping of the tapping prevention unit. A tapping release canceling section for canceling the blocking operation is provided as means for solving the above-mentioned problem.

An eleventh aspect of the present invention is a bath apparatus capable of constantly taking a bath according to any one of the first to ninth aspects of the invention, hot water supply means for supplying hot water to the bathtub, and water level detection for detecting the water level of the bathtub. A water replenishment control unit for replenishing hot water to the bathtub by the hot water supply means and increasing the bathtub water level to the above-mentioned holding water level when detecting that the bathtub water level has dropped below a predetermined holding water level based on the means. The configuration is a means for solving the above problem.

In a twelfth aspect of the present invention, the water replenishment control section constituting the eleventh aspect of the present invention detects the start of hot water from the hot water supply passage of the always-bathable bath apparatus, and supplies the hot water to the bathtub by the hot water supply means. The means for solving the above-mentioned problem is provided by a configuration for supplementing hot and cold water.

A thirteenth aspect of the present invention is the bath apparatus of any one of the first to ninth aspects of the present invention; a hot water supply means for supplying hot water to the bathtub; A tapping water amount detecting unit for detecting a tapping water amount discharged from the passage; and a water replenishing control unit for replenishing tap water with the tapping water amount detected by the tapping water amount detection unit to the bathtub by the tap water supply means. This is a means for solving the above problem.

According to a fourteenth aspect of the present invention, there is provided a bath apparatus capable of always taking a bath according to any one of the first to ninth aspects of the invention; hot water supply means for supplying hot water to a bathtub; Time measuring means for measuring the lapse of time from the start of tapping from the passage; flow rate information of tapping water from the tapping path; flow rate information of hot water supplied to the bathtub by the tapping means; and time measuring means. A hot water supply time detecting section for obtaining a hot water supply time necessary for replenishing the bath water amount reduced by hot water supply by the hot water supply means based on the information on the measured time of the hot water; and a hot water detected by the hot water supply time detecting section. And a water replenishment control unit for replenishing the bathtub with hot water using the hot water supply means based on the supply time.

According to a fifteenth aspect, in addition to the configuration of the fourteenth aspect, a tapping flow rate detecting means for detecting a flow rate of tapping water flowing out of the tapping passage, and a tapping water flow rate supplied to the bathtub by the tapping water supply means. At least one of water replenishment flow rate detecting means for detecting is provided, and based on the flow rate of hot water detected by the flow rate detecting means, the hot water supply time detecting section solves the above problem by a configuration for obtaining the hot water supply time. Means.

According to a sixteenth aspect of the present invention, a bathtub water level is detected when the rehydration control section constituting the thirteenth, fourteenth, or fifteenth aspect detects that the bathtub is being refilled. When the water level detecting means detects that the bathtub water level has reached a predetermined upper limit water level, a water replenishment forced stop unit for forcibly terminating water replenishment to the bathtub is provided as means for solving the above problem.

According to a seventeenth aspect, in addition to the configuration of the thirteenth, fourteenth, fifteenth, or sixteenth aspect, a signal notifying that hot water discharged from the hot water passage is used to enter a bathtub. The water replenishment prevention unit that does not refill the bathtub by the water replenishment control unit when the water replenishment control unit is provided is provided as means for solving the above problem.

An eighteenth aspect of the present invention includes a time measuring means for measuring a lapse of time from the time when the tapping is started from the tapping passage constituting one of the above-mentioned inventions. When the tapping is stopped before the time from the start of the water supply reaches a predetermined set time, the above-described problem is solved by a configuration in which a rehydration prohibition control unit that does not perform the rehydration operation by the rehydration control unit is provided. Means.

According to a nineteenth aspect, the hot and cold water supply means constituting any one of the tenth to seventeenth aspects of the invention is constituted by a hot water supply combustion device for producing hot water and supplying hot water.
The means for solving the above-mentioned problem is constituted by supplying hot water produced by the hot water supply / burning device to the bathtub.

In the invention having the above-mentioned structure, for example, when the flow of the bathtub hot water is switched to the circulation side water flow by the switching means, the bathtub hot water is circulated through the circulation passage by the driving of the circulation pump, and the bathtub hot water is predetermined by the heating means. It is kept warm.

When the flow of the bath water is switched to the tapping water flow by the switching means while the bath water is kept warm, the hot water drawn into the circulation passage from the bathtub by the circulation pump is predetermined through the tapping passage. Take the hot water to the designated hot water location.

By providing a structure that allows the bathtub hot water to be supplied as described above, the bathtub hot water is used by being pumped out by a bather and used by being taken out of a hot water passage. There is, as in the past, the amount of reduction in the use of bathtub hot water can be significantly increased than just being pumped out and used by bathers, and the rate of bathtub hot water conversion can be dramatically improved. It is possible.

In addition, hot water supply means is provided, and the bath water is automatically supplied to the bath tub by the hot water supply means when the bath water decreases due to hot water supply. It is possible to maintain a bathtub water level at which a person can take a bath.

Further, when a shower head is provided at the outlet of the hot water passage and hot water discharged from the hot water passage is used as hot water for the shower, the hot water flows at a flow rate by the circulation pump. The momentum is strong, it is possible to eliminate the dissatisfaction of many shower users that the momentum of the shower is weak, and the hot water temperature required for the shower hot water is almost the bathing hot water temperature,
Since the hot water having the desired bathing water temperature is immediately discharged from the shower head, it is not necessary to adjust the hot water temperature of the shower. In addition, the temperature of the hot water is kept stable because the hot and cold tub water flows out, which prevents discomfort caused by fluctuations in the hot water temperature of the shower to the shower user. It is possible to prevent the problem that the hot water is wastefully discarded until the hot water temperature is stabilized, and to obtain a water saving effect.

[0032]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a model diagram showing a 24-hour bath apparatus 1 which is a constantly bathable bath apparatus according to a first embodiment of the present invention. What is characteristic of the 24-hour bath apparatus 1 shown in this embodiment is that, as shown in the figure, the hot water passage 12 is connected to the circulation passage 6, and the bath water is passed through the circulation passage 6 and the hot water passage 12 in this order. That is, a configuration is provided in which hot water can be supplied to a predetermined hot water use location. The other configuration is the same as the configuration of the 24-hour bath apparatus 1 shown in FIG. 15. In the first embodiment,
The same components as those of the 24-hour bath apparatus 1 shown in FIG. 15 are denoted by the same reference numerals, and redundant description of the common portions will be omitted.

In the first embodiment, one end (inlet side) of the tapping passage 12 is connected to the circulation passage 6 on the discharge port side of the circulation pump 3, and the other end (outlet side) is connected to the shower head. 13 are provided, and the hot water supply passage 12 and the circulation passage 6 are provided.
Switching means 14 is interposed at the connection portion with.
The switching means 14 switches between a circulation side water flow for circulating the bathtub hot water through the circulation passage 6 and a tapping side water flow for discharging the bathtub hot water from the circulation passage 6 to the predetermined hot water use location through the tapping passage 12. In this embodiment, a three-way valve that performs a switching operation according to a control command from the control device 11 is configured.

In this embodiment, it is assumed that the hot water discharged from the hot water passage 12 is used as hot water for a shower in a bathroom, and the shower head 13 is attached to the outlet side of the hot water passage 12 as described above. The shower head 13 is provided with hot water instructing means 15 (for example, a shower button or the like). The tapping command means 15 is configured to issue a tapping command when operated by a shower user while the shower is stopped.

Further, a water level detecting means 16 capable of detecting the water level of the bathtub 2 is provided. The water level detecting means 16 used in this embodiment is configured to have three electrode rods, and one of the three electrode rods has a bathtub water level which is a predetermined full water level (for example, FIG. Water level H shown in 1)
Is formed so as to output a full-water detection signal when the temperature of the bathtub reaches one, and one of the remaining two electrode rods is connected to the lower limit value of the bathtub bath water level range in which the bathtub water is predetermined (for example, as shown in FIG. 1). When the water level is equal to or higher than the indicated water level M), a tapping start allowable water level detection signal is formed, and the remaining one electrode rod is connected to the lower limit of a predetermined bathing allowable bathtub water level range (for example, a bathtub water level). When the water level is equal to or higher than the water level L) shown in FIG. 1, the hot water supply allowable water level detection signal is output.

The above-mentioned full water level H is a bathtub water level which is considered to be desired when a bather takes a bath, and is predetermined based on a survey such as a questionnaire.

The above-mentioned hot-water supply allowable bathtub water level range is a water level range in which the bathtub hot water can be continuously supplied from the hot-water supply passage 12 and can be set appropriately in advance. In this embodiment, the water level at the upper end portion of the suction port 4 of the circulation passage 6 is set as the lower limit value L of the hot-water bath tub water level range. This is because the bathtub water level is lower than the suction port 4 of the circulation passage 6.
When the air falls into the circulation passage 6 below the upper end position, the hot water discharge ability of the circulation pump 3 is reduced due to the adverse effect of the air, so that the shower user cannot discharge the hot water with a satisfactory momentum. In addition to this, there is a possibility that the circulation pump 3 may be broken due to an idle operation, and therefore, in this embodiment, the hot water can be discharged at a water pressure satisfying the shower user, and the circulation pump 3 Is set as the hot-water bath allowable bath water level range, and the lower limit L of the hot-water bath allowable bath water level range is set to the water level of the upper end portion of the suction port 4 of the circulation passage 6.

Further, in order to prevent the bathtub water level from dropping below the lower limit value L of the bathing allowable bathtub level immediately after the start of tapping, the lower limit value M of the bathing start allowable bathtub level is set to the above value. The water level above the lower limit value L of the hot-water bath tub water level range is set, and in this embodiment, the water level above the upper end of the suction port 4 of the circulation passage 6 by a predetermined minute water level is the hot-water start permission. The lower limit value M of the bathtub water level range is set.

FIG. 2 is a block diagram showing an example of a main control configuration of the control device 11. This control device 11
Has a warming control unit 20, a hot water control unit 21, a hot water blocking unit 22, a pump drive control unit 23, a water level monitoring unit 25, a notification control unit 26, and a hot water forced stop unit 27, as shown by the solid line in FIG. It is configured.

The pump drive control unit 23 has a structure for controlling the drive of the circulation pump 3. The heat retention control unit 20 controls the drive of the circulation pump 3 by the pump drive control unit 23, The configuration is such that while the bath water is circulated through the circulation passage 6 by the drive of, the heating means 8 keeps the bath water at a predetermined bath water temperature. In addition,
There are various methods for controlling the heat retention of the bathtub hot water, and here, any of these methods may be used to perform the heat retention control, and the description thereof will be omitted.

The water level monitoring unit 25 monitors the bathtub water level by taking in the water level detected by the water level detection means 16 from time to time.

The tapping prevention unit 22 fetches the monitoring information of the water level monitoring unit 25 from time to time, and based on the monitoring information, detects that the water level detection means 16 has not output the tapping start allowable water level detection signal. In order to prevent the start of hot water supply, it is determined that the bath water cannot be started through the hot water passage 12 because the bath water level is lower than the lower limit value M of the hot water supply start allowable bath water level range. Is output to the hot water control unit 21 and the notification control unit 26.

The hot water blocking unit 22 includes a water level monitoring unit 25.
When it is detected that the tapping start allowable water level detection signal is output from the water level detecting means 16 on the basis of the monitoring information, the bathtub water level is equal to or higher than the lower limit value M of the bathing start allowable bathtub water level range, and the tapping passage 12 Is determined to be able to start the hot water supply from the bathtub, and the hot water prevention signal is not output.

When the notification control unit 26 receives the tapping prevention signal, the notification control unit 26 reports that it is not possible to start tapping the bathtub from the tapping passage 12 due to insufficient water level. For example, an alarm lamp 28 is provided in a place noticeable to a shower user, for example, or an alarm buzzer 30 is provided, and the notification control unit 26 turns on the alarm lamp 28 when the hot water prevention signal is added, It blinks to inform visually that it is not possible to start tapping due to lack of water level, or it sounds a buzzer sound or electronic sound by the alarm buzzer 30 to notify that it is not possible to tap water auditorily due to lack of water level. Encourage bathers to refill the bathtub with hot water.

When the tapping control unit 21 detects that the tapping command means 15 is operated by the shower user and a tapping command is issued by the shower user in a state where the tapping prevention signal is not applied from the tapping prevention unit 22, the pump is controlled by the pump. Drive control unit 23
And the switching means 14 is switched from the circulation side to the tapping side after the pump drive control section 23 temporarily stops the drive of the circulation pump 3. As described above, the switching operation of the switching unit 14 is performed after the driving of the circulation pump 3 is stopped, so that the switching between the circulation-side water flow and the tapping-side water flow can be smoothly performed.

After switching the switching means 14 to the tapping side, the tapping control section 21 issues a pump restart command to the pump drive control section 23 to restart the driving of the circulation pump 3. By driving the circulation pump 3, the bath water flows out of the circulation passage 6 through the hot water passage 12 and the shower head 13, and the shower user starts supplying hot water.

The tapping control section 21 is provided with the tapping prevention section 2.
When it is detected that the tapping command is issued from the tapping command means 15 in a state where the tapping prevention signal is added from 2, the tapping command is issued from the tapping command means 15, but tapping is started due to insufficient water level. It is determined that the hot water supply cannot be performed, and the circulation of the bath water is continued without performing the tapping start operation.

The hot water supply forcible stop unit 27 is provided with a running water switch or the like which can detect that the bath water is flowing through the hot water supply passage 12 based on information from the hot water supply control unit 21 or can detect the flow of water through the hot water supply passage 12. And a means capable of detecting the switching position of the switching means 14 based on the sensor output or while detecting based on the information of the means, the monitoring information of the water level monitoring unit 25 is provided. Capture every moment.

The hot water supply forced stop unit 27 is provided with the water level monitoring unit 25.
When it is detected based on the monitoring information that the water level detecting means 16 is outputting the hot water allowable water level detection signal, it is determined that the hot water can be continued because the bathtub water level is within the hot water allowable bathtub water level range. And continue the hot water. Also, when detecting that the output of the allowable tapping water level detection signal of the water level detecting means 16 has stopped, the hot water supply forcible stop unit 27 has lowered the bathtub water level below the lower limit value L of the allowable bathtub water level range due to the hot water supply. It determines that it is necessary to stop tapping, and outputs a tapping forced stop signal for forcibly stopping tapping to tapping control unit 21 and notification control unit 26.

When the hot water supply forcible stop signal is applied, the hot water supply control section 21 outputs a pump interruption signal to the pump drive control section 23 to stop the circulating pump 3 by the pump drive control section 23 and to supply hot water from the bathtub. After the circulation pump 3 is stopped, the switching means 14 is switched from the tapping side to the circulation side. Then, the hot water control unit 21 switches the pump drive control unit 23 after the switching unit 14 switches.
To restart the operation of the circulation pump 3 to circulate the bath water through the circulation passage 6.

The notification control unit 26 includes the forcible hot water stopping unit 27.
When a hot water supply forced stop signal is applied from the controller, the fact that the hot water is forcibly stopped due to insufficient water level is notified in the same manner as described above. By notifying the water level shortage when the hot water is forcibly stopped due to the water level shortage, the user of the hot water can know the cause of the stoppage of the hot water supply during use of the shower. The user can know that the stop of hot water is not caused by an abnormality of the apparatus.

The tapping instruction means 15 issues a tapping stop command for stopping tapping when the shower user operates the showering tap during tapping, and the tapping control section 21 detects that the tapping stop command is issued. Output, a pump interruption signal is output to the pump drive control
Is stopped, and the tapping is stopped. Thereafter, hot water control section 21 switches switching means 14 from the hot water side to the circulation side, outputs a pump restart signal to pump drive control section 23, restarts the operation of circulation pump 3, and restarts the circulation of the bathtub hot water.

According to this embodiment, the tapping passage 12 is connected to the circulation passage 6, and a switching means 14 is provided at a connection portion between the tapping passage 12 and the circulation passage 6, and the switching means 1 is provided.
4, the circulation side water flow for circulating the bathtub hot water through the circulation passage 6 and the bathtub hot water from the circulation passage 6 to the hot water passage 12
Of the hot-water supply side through which the hot water is supplied through the circulation passage 6, so that it is possible to keep the temperature of the bath water by the heating means 8 while circulating the bath water through the circulation passage 6. , The bath water can be discharged through the hot water passage 12 as, for example, shower water.

As described above, the bathtub hot water can be effectively used as shower hot water, so that the bathtub hot water is used by being pumped out by a bather or the like, and when it is used as a shower hot water. In some cases, the amount of bathtub hot water used is greatly reduced as compared with the conventional case where bathtub hot water is simply pumped out by a bather and used.

For example, according to a survey by the Tokyo Gas Co., Ltd. Urban Life Research Institute, the time for one person to use a shower for one bathing is about 8 minutes on average, and the flow rate of the shower is about 10 to 12 ( Liters / minute)
The amount of hot water used by one bather for showering in one bath is
It can be estimated to be about 80-96 liters.
On the other hand, the amount of hot water in the bathtub 2 is usually about 200 to 220
Since it is about 1 liter, about 40% to 50% of the amount of water in the bathtub 2 is used for showering each time one bather takes a bath.

Since a large amount of bath water is used for the shower as described above in addition to the amount of hot water pumped and used by a bather or the like, the water exchange rate of the bath water can be drastically improved. As a result, a more sanitary bath can be provided.

When the bathtub water level is lower than a predetermined lower limit M of the bathing start allowable bath water level range, a tapping prevention unit 22 for preventing the start of tapping of bathtub hot water is provided, so that tapping is started. It is possible to avoid the problem that air enters the circulation passage 6 due to the shortage of the water level and the circulation pump 3 runs idle due to the air, thereby causing a failure of the circulation pump 3.

Further, when the bathtub water level falls below the lower limit value L of the predetermined bathing permissible bathtub water level during tapping, a tapping forced stop section 27 for forcibly stopping tapping is provided. Failure of the circulating pump 3 due to idling can be prevented. Of course, usually, when a bather takes a bath, the bathtub 2 has about 200 to 2 above.
Since it is thought that there is about 20 liters of hot water, even if the bath tub is used by the bather as about 80 to 96 liters as the shower hot water as described above, the bath tub hot water is not lower than the lower limit L of the above-mentioned bathing allowable bath tub water level range. It is considered that there is almost no drop in the temperature, so that it is unlikely that the tapping stop section 27 stops tapping during the use of the shower due to the drop in water level.

By the way, it was found by a survey by Tokyo Gas Co., Ltd. Urban Life Research Institute that the following dissatisfaction was made with the shower. The most dissatisfied point of the shower was that the momentum of the shower was weak, followed by the frustration that the temperature of the hot water fluctuated. In the case of a shower of a type in which a desired hot water is adjusted by manual adjustment, there are many complaints that the temperature control of the shower is troublesome.

In this embodiment, since the bath water is discharged as hot water from the bath through the hot water passage 12 by the drive of the circulating pump 3, all of the above complaints can be solved as follows. The bath water can be supplied at the discharge water pressure of the circulation pump 3, and the shower discharge water pressure is a water pressure satisfactory to the shower user, so that the above dissatisfaction that the momentum of the shower is weak can be solved.

Further, since the hot water kept at the temperature of the bath water in the bathtub is discharged, the temperature of the shower water becomes stable at the temperature of the bath water, and the dissatisfaction that the shower water temperature fluctuates can be solved. Further, as described above, since the hot water that has been kept at the bath water temperature is discharged, the shower user does not have to manually adjust the shower water temperature, thereby solving the complaint that the hot water temperature adjustment is troublesome. it can.

In addition, since the hot water of the bathing water temperature can be discharged from the start of the tapping as described above, water saving can be achieved. That is, when hot water for showering is supplied from a water heater or the like that produces hot water by heating water and supplies hot water, it takes time from the start of hot water supply to the supply of hot water having a desired hot water temperature. And the water flowing out of the shower during that time was wasted. However, as described above, in this embodiment, since the hot water of the bathing water temperature can be discharged from the start of the hot water supply, the desired hot water can be discharged. It is possible to eliminate water that is wasted until the hot water comes out, and to save water. Furthermore, since the time from the start of hot water supply until hot water of a desired hot water temperature is discharged can be omitted, useless time can be saved.

As described above, the hot water supply passage 1
By providing a configuration capable of supplying hot water to the shower through the shower bath 2, it is possible to promote the replacement of hot water in the bathtub 2 and to provide an even more sanitary bath. It is possible to obtain an epoch-making effect that it is possible to achieve both the excellent effect of being able to eliminate the dissatisfaction that many people have and the excellent effect.

Further, since the shower head 13 is provided with the hot water instructing means 15, the shower hot water can be instructed at hand, and the shower hot water can be started without troublesome operation for starting the shower hot water. It can be commanded, and it is convenient.

Furthermore, since the dust removing means 7 and the sterilizing means 10 are provided on the upstream side of the connection between the circulation passage 6 and the hot water passage 12, the dust in the hot water is removed by the dust removing means 7 and the sterilizing means is provided. Since the hot and cold water sterilized by 10 can be discharged as a shower, very sanitary hot water without waste can be supplied as the shower water.

In the above-described embodiment, the hot water kept in the bathtub 2 is supplied as it is through the hot water supply passage 12. However, when the hot water temperature desired by the shower user is higher than the hot water temperature of the bath. The hot water in the bathtub may be heated by the heating means 8 and the hot water raised to the required hot water temperature may be discharged through the hot water passage 12.

Hereinafter, a second embodiment will be described. This embodiment is different from the first embodiment in that the switching unit 14 is not switched by the control operation of the tap control unit 21 based on the tap command output from the tap command unit 15. The switching means 14 is provided with a switching operation section (not shown), and the switching operation section is manually switched by the switching operation section. The other configuration is the same as that of the first embodiment, and the description of the common parts will not be repeated.

In this embodiment, the switching means 1
4 is provided with a switching operation unit (not shown) for manually switching between the circulation side water flow and the tapping side water flow as described above. The switching operation unit is operated by a bather or the like to switch the switching means 14. The switching circulation-side water flow and the tapping-side water flow are configured to be manually switched. Also,
The switching means 14 is provided with switching prevention means (not shown) for preventing switching from the circulation side to the hot water side based on a command from the tapping prevention unit 22.

FIG. 3 is a block diagram showing a main control configuration example of the control device 11 shown in the second embodiment. The control device 11 includes a heat retention control unit 20, a tapping prevention unit 22, a pump drive control unit 23, a water level monitoring unit 25, a notification control unit 26, and a tapping forced stop unit 27. The components of the heat retention control unit 20, the water level monitoring unit 25, the pump drive control unit 23, and the notification control unit 26 are the same as those of the heat retention control unit 20, the water level monitoring unit 2 shown in the first embodiment.
5, since the configuration is the same as that of each of the pump drive control unit 23 and the notification control unit 26, the description thereof will not be repeated.

The tapping prevention section 22 fetches the water level monitoring information of the water level monitoring section 25 from time to time, and based on the monitoring information, detects that the water level detection means 16 is outputting the tapping start allowable water level detection signal. Determines that it is possible to start the bathtub hot water since the bathtub water level is within the bathing start allowable bathtub water level range.

Further, while detecting that the water level detection means 16 does not output the water level detection signal from the water level detecting means 16 based on the water level monitoring information of the water level monitoring section 25, the water level of the bathtub is changed to the level at which the water level of the bathtub starts. Lower limit M of allowable bathtub water level range
It is determined that it is not possible to start the bathtub hot water supply since the temperature is lower than that of the bathtub.
Is output to the notification control unit 26, and the switching prevention unit is operated to prevent the switching unit 14 from being switched by the operation of the switching operation unit from the circulation side to the tapping side, and the tapping is not possible due to insufficient water level. This is notified by the notification control unit 26.

The hot water supply forcible stop section 27 is provided with switching information of the switching means 14 (specifically, for example, the switching means 14
And a sensor such as a running water switch for detecting the flow of water in the hot water passage 12 is provided to detect that the tapping is performed based on the sensor output information and the sensor output information. During the operation, the water level monitoring unit 2
5 is fetched every moment and based on the information, when it is detected that the water level detection means 16 outputs the hot water level detection signal, the bathtub water level is within the water level range. Is determined to be able to be continued, and the tapping is continued.

Further, when detecting that the output of the allowable tapping water level detection signal from the water level detecting means 16 has stopped, the tapping water forced stop section 27 has determined that the bathtub water level has fallen below the lower limit L of the tapping allowable bathtub water level range. It determines that it is necessary to immediately stop tapping, and outputs a tapping forced stop signal to the pump drive control unit 23 and the notification control unit 26. The pump drive control unit 23 stops the circulating pump 3 to discharge the bathtub hot water. In addition to forcibly terminating, the notification control unit 2
6 is notified that the tapping was forcibly stopped due to insufficient water level.

According to this embodiment, the hot water supply passage 12 is connected to the circulation passage 6, and the bath water can be discharged as hot water for showering through the hot water supply passage 12 by manually switching the switching means 14. As described in the first embodiment, the water supply rate of the bathtub can be remarkably improved, and an even more sanitary bath can be provided at any time. It is possible to obtain an epoch-making effect that both the dissatisfaction can be eliminated and a comfortable shower use can be provided.

The third embodiment will be described below. The features of the third embodiment are different from those of the above embodiments, in that the capacity of the circulation pump 3 when the bathtub hot water is circulated through the circulation passage 6 and the bathtub hot water are supplied to the tapping passage 1.
2 is provided with a control structure for variably controlling the capacity of the circulation pump 3 when tapping water through the hot water 2. The other configuration is the same as that of each of the above embodiments, and the overlapping description of the common parts will be omitted.

In this embodiment, as shown by a dotted line in FIG. 2 or FIG. 3, a data storage section 24 is provided in the control device 11, and when the bathtub hot water is circulated through the circulation passage 6 in the data storage section 24. Is stored in advance as circulation-side pump capacity data, and the capacity data of the circulation pump 3 when tap water is discharged from the bathtub through the hot-water passage 12 is predetermined. Is stored as

The pump drive control section 23 is provided with the switching means 14
(E.g., a switching unit 14 is provided with a sensor for detecting a switching position, a sensor output information thereof, and a water flow sensor capable of detecting water flow in the hot water passage 12 is provided with the sensor output information, When the control unit 21 is provided, control information of the hot water control unit 21 and the like)
When it is detected that the bathtub hot water is circulating in the circulation passage 6 based on the above, the driving of the circulation pump 3 is performed so that the capacity of the circulation pump 3 becomes the circulation side pump capacity stored in the data storage unit 24. Control means 14 for controlling the quantity
Is switched from the circulation side to the tapping side, and when it is detected that the bathtub hot water has started to tap from the tapping passage 12, the capacity of the circulation pump 3 is switched from the circulation side pump capacity to the tapping side pump capacity, and the circulation pump is turned on during the tapping. The driving amount of the circulation pump 3 is controlled so that the capacity of the circulation pump 3 becomes the above-mentioned tapping-side pump capacity.

There are various control methods for controlling the driving amount of the circulating pump 3 so that the capacity of the circulating pump 3 becomes the target capacity. Here, there are various methods. May be adopted, and the description thereof will be omitted.

In this embodiment, the capacity of the circulation pump 3 when the bath water is circulating in the circulation passage 6 and the capacity of the circulation pump 3 when the bath water is discharged from the hot water passage 12 are variably controlled. With the configuration, the shower water can be taken out with a more suitable water pressure desired by the user of the shower water, and it is possible to provide the user of the shower with a more comfortable bath. Become.

Hereinafter, a fourth embodiment will be described. In the fourth embodiment, an example of a water changing system of a bath apparatus that can always take a bath is shown. As shown in FIG. 4, the 24 hour bath apparatus of any one of the 24-hour bath apparatuses 1 shown in each of the above-described embodiments is provided for the water changing system of the always-bathable bath apparatus shown in the fourth embodiment. In addition to the above, hot water supply combustion equipment 32 (for example, hot water supply combustion equipment using electricity such as an electric water heater or hot water supply combustion using gas or oil) capable of heating water to produce hot water and supply the hot water. machine)
A hot water supply passage 33 for guiding hot water produced by the hot water supply and combustion equipment 32 to the bathtub 2, and a supply valve 34 formed by an electromagnetic valve or the like for opening and closing the passage 33. Further, the control device 11 of the 24-hour bath apparatus 1 is provided with a water replenishment control unit 36, a time measuring unit 37, and a water replenishment prohibition control unit 38, as shown in FIG. Have been. In the description of this embodiment, the same components as those of the 24-hour bath apparatus 1 shown in each of the above embodiments will be denoted by the same reference numerals, and redundant description of the common portions will be omitted.

The water replenishment control section 36 fetches the monitoring information of the water level monitoring section 25 from time to time, and when it detects that the water level detection means 16 outputs the full water detection signal based on the monitoring information, the water level of the bathtub 2 is reduced. It is determined that the water level is held at a predetermined holding water level (in this embodiment, the full water level H), the monitoring of the water level is continued, and the full water detection signal of the water level detecting means 16 based on the monitoring information of the water level monitoring unit 25. When it is detected that the output has stopped, it is determined that the bathtub water level has become lower than the above-mentioned holding water level H, it is determined that it is necessary to supply hot water to maintain the bathtub water level at the holding water level H, and replenishment is performed. The valve 34 is opened.

When the supply valve 34 is opened, water such as tap water flows into the hot water supply / combustion device 32, and the hot water supply / combustion device 32 has a structure for producing hot water to be supplied to the bathtub 2 by this water supply. Hot water produced by the device 32 is supplied to the bathtub 2 through the hot water filling passage 33, and rehydration of the bathtub 2 is started.

As described above, hot water supply means for supplying hot water to the bathtub 2 is constituted by the hot water supply combustion device 32, the hot water filling passage 33, and the supply valve.

The water replenishment control unit 36 continuously captures the monitoring information of the water level monitoring unit 25 even after the supply valve 34 is opened, and detects that the full water level detection signal has been output from the water level detection unit 16 based on the monitoring information. Sometimes it is determined that the water level in the bathtub 2 has risen to the holding water level H due to the above water refilling,
The replenishing valve 34 is closed to terminate the water supply to the bathtub 2.

As described above, the bathtub water level can be maintained at the predetermined holding water level H by the water replenishment control unit 36.

The rehydration prohibition control section 38 is provided with the switching means 14
And the operation information of the water replenishment control unit 36 is fetched from time to time, and based on the information, when it is detected that hot water is started with the supply valve 34 closed, the bathtub water level is maintained. It is determined that tapping has been started from the state where the water is held at the water level H, and when the tapping is started from the state where the water is held at the water level H as described above, even if the bather does not supply water immediately after the start of tapping, the bather can adjust the bathtub water level due to the tapping. Since it is assumed that the decrease is not bothersome, it is determined that it is not necessary to refill the water, and the rehydration control unit 36 outputs a rehydration prohibition signal. When the rehydration prohibition signal is added, the rehydration control unit 36 performs the valve opening control of the replenishment valve 34 even if it detects that the bathtub water level has dropped below the holding water level H based on the water level monitoring information of the water level monitoring unit 25. Absent.

The time measuring means 37 is constituted by a clock mechanism. The switching information of the switching means 14 is fetched moment by moment, and when it is detected that the tapping is started based on the information, the clock mechanism is driven, and the tapping mechanism is driven. The elapsed time from the start of is measured.

After outputting the rehydration prohibition signal as described above, the rehydration prohibition control section 38 captures the measurement time of the time measuring means 37 every moment, and the captured measurement time is predetermined in the data storage section 24. Compared to the set time Tsp (for example, 60 seconds), it is determined whether the measured time has reached the set time Tsp.

The set time Tsp is a time required for the bather to drop from the holding water level H to a water level at which the bather feels uncomfortable with the drop in the water level. And the like, and stored in the data storage unit 24.

As a result of the above comparison, when the water replacement prohibition control section 38 determines that the time measured by the time measuring means 37 has not reached the set time Tsp, the drop in the bathtub water level due to hot water is small, and hot water is supplied to the bathtub 2. It is determined that it is not necessary, and the rehydration prohibition operation is continued. When determining that the measured time has reached the set time Tsp, the rehydration prohibition control unit 38 determines that it is necessary to start water replenishment, and releases a replenishment prohibition operation to output a release signal for starting the water replenishment operation. Output to the control unit 36.

Upon receiving the release signal, the water replenishment control unit 36 opens the replenishing valve 34 and starts water refilling of the bathtub 2 in order to correct the water level that has been lowered due to the hot water dispensing operation.

When the water replacement prohibition control unit 38 detects that hot water is started from the state in which the supply valve 34 is open, based on the switching information of the switching means 14 and the operation information of the water replenishment control unit 36, Since it is considered that tapping was started from a state in which the bathtub water level was significantly lower than the held water level H, it was determined that the water replenishment operation by the water replenishment control unit 36 needed to be continued.
Continue the water replenishment operation of.

The control structure of the water refilling system for a constantly bathable bath in this embodiment is configured as described above, and the first embodiment will be described below with reference to the flowcharts of FIGS. 6 and 7. A control operation example of the water replacement system when the 24-hour bath apparatus 1 shown in the embodiment is used will be briefly described.

First, in a state where the temperature of the bath tub is kept warm while circulating it through the circulation passage 6, step 101 in FIG.
The water replenishment control unit 36 determines that the bathtub water level is the lower limit value M of the hot water bathtub range based on the monitoring information of the water level monitoring unit 25.
Is determined to be lower than the lower limit value M, it is determined that the bathtub 2 needs to be replenished with hot and cold water.
And the hot water produced by the hot water supply / burning device 32 is supplied to the bathtub 2 through the hot water filling passage 33.

Thereafter, it is determined again in step 101 whether or not the bathtub water level is lower than the lower limit value M. If the bathtub water level rises due to the water supplement, the bathtub water level is higher than the lower limit value M. If it is determined, step 102
Then, it is determined whether or not the bathtub water level is lower than the holding water level H based on the monitoring information of the water level monitoring unit 25.

When it is determined that the bathtub water level is lower than the holding water level H, at step 103, the supply valve 3
It is determined whether or not the valve 4 is closed.
When the supply valve 34 is in the open state by the operation of, it is determined that the supply valve 34 is open,
In step 104, with the supply valve 34 kept open,
In step 105, hot water supply control section 21 outputs hot water instructing means 15
Is operated and a hot water (shower) command is issued.

If it is determined in step 105 that the hot water supply command has not been issued, step 102 is executed again.
Then, the rehydration control unit 36 determines whether or not the bathtub water level is lower than the retained water level H.
Then, it is determined whether or not the supply valve 34 is open. If it is determined that the supply valve 34 is open, in step 111, the supply valve 34 is closed to end the water supply to the bathtub 2. I do.

As described above, in the state where the bathtub water level is held at the holding water level H, the tapping control unit 21 operates the tapping command means 15 to issue a tapping command according to the result of the determination in step 105. Is detected, the circulation pump 3 is interrupted by the pump drive control unit 23 in step 106, and in a state where the circulation pump 3 is stopped, the hot water supply control unit 21 circulates the switching means 14 in step 107. Switch from side to tapping side.

Thereafter, in step 108, the circulation pump 3 is restarted by the pump drive control section 23 to start tapping of the bathtub hot water, and the time measuring means 37 drives the clock mechanism to start tapping. The measurement of the elapsed time T is started.

In step 112 shown in FIG. 7, the water replacement prohibition control unit 38 determines that the measured time T is equal to the set time Tsp (for example, 6
0 seconds), and when it is determined that the measurement time T has not reached the set time Tsp, the tapping is started from the state of the holding water level H, and the elapsed time after the start is short. It is determined that the decrease in the bathtub water level due to the hot water is not anxious for the bather, and the bathtub water level is lower than the retained water level H due to the hot water, but it is determined that it is not necessary to refill the bathtub 2. The water replenishment operation of the control unit 36 is prohibited.

As described above, during the period from the start of tapping until the set time Tsp is reached, at step 116, tapping control section 21 determines whether tapping means 15 has been operated and a tapping stop command has been issued. When it is determined that the hot water supply stop command has not been issued and the shower is being continuously used, in step 112 again, the water replacement prohibition control unit 38 sets the measurement time T of the time measurement unit 37 to the set time. It is determined whether Tsp has been reached.

In the state where the hot water supply is continued, when the water replenishment prohibition control unit 38 determines that the elapsed time T from the start of the hot water supply has reached the set time Tsp, the water replenishment prohibition control unit 38 outputs a release signal for releasing the water replenishment prohibition. It outputs to the rehydration control part 36, and the time measuring means 37 resets a clock mechanism in step 113,
In step 114, the water replenishment control unit 36 determines whether or not the supply valve 34 is open. Bathtub water level is held water level H
When the hot water is started from the state, the supply valve 34 is closed, so it is determined that the supply valve 34 is closed, and the water level drops considerably from the holding water level H to the bathtub 2 due to the hot water. In step 120, the water replenishment control unit 36 opens the replenishment valve 34.

Then, while replenishing the bathtub 2, in step 115, the hot water supply forced stop unit 27 sets the water level monitoring unit 25.
It is determined whether or not the bathtub water level is equal to or higher than the lower limit L of the hot-water bath allowable bathtub level range based on the monitoring information.If it is determined that the bathtub water level is equal to or higher than the lower limit L, both hot water supply and replenishment are continued. In step 116, the tapping control unit 21 determines whether or not the tapping stop command has been issued by the tapping command unit 15, and when it is determined that the tapping stop command has been issued, in step 117, the tapping control unit 21
Stops the operation of the circulation pump 3 by the pump drive control unit 23 to end the tapping.

Thereafter, at step 118, hot water control unit 2
1 switches the switching means 14 to the circulation side, and in step 119, restarts the circulation pump 3 to restart the circulation of the bath water. Then, the operations after step 101 are repeated again to raise the bathtub water level to the holding water level H and prepare for the next hot water supply.

When it is determined in step 115 that the bathtub water level has fallen below the lower limit L, in step 117, the hot water supply forced stop unit 27 forcibly stops the circulating pump 3 to supply hot water. Is forcibly terminated,
As described above, in step 118, the switching means 14 is switched from the tapping side to the circulation side, and in step 119, the circulation pump 3 is restarted, and the heat retention control unit 20 performs the heat retention operation of the bathtub hot water and the step 101. The subsequent operations are repeated to raise the bathtub water level to the holding water level H and prepare for the next hot water supply.

According to this embodiment, the first through third
In addition to any one of the 24-hour bath apparatuses 1 shown in each of the embodiments, the hot-water supply means for supplying hot water to the bathtub and the bathtub water level is maintained based on the water level detection means 16. Since the control structure for maintaining the water level at H is provided, not only the epoch-making effects shown in the above embodiments can be achieved, but also the bathtub water level is significantly lowered from the water level at the time of tapping. Even if it does, hot water is automatically replenished to the bathtub 2, whereby the bathtub 2 can be maintained at the holding water level H without any trouble of human hands. You can bathe comfortably.

Hereinafter, a fifth embodiment will be described. This embodiment is different from the fourth embodiment in that the bathtub water level is not maintained at the holding water level H based on the water level detection means 16 but the bathtub water level is lowered by tapping. This is to provide a configuration that raises the bathtub water level by refilling water to the bathtub water level when the hot water is started. The other configuration is the same as that of the fourth embodiment, and the overlapping description of the common parts will be omitted.

In this embodiment, the flow rate of hot water flowing out of hot water passage 12 can be detected, and the flow rate of hot water supplied to bath tub 2 from hot water filling path 33 can be detected. A possible water replenishment flow rate detecting means 41 is provided as shown by a dashed line in FIG. 4, and the control device 11 includes, in addition to the water replenishment control unit 36, the time measuring means 37 and the water replenishment prohibition control unit 38, as shown by the solid line in FIG. And the hot water amount detector 4
3 and a rehydration water amount detection unit 44. Since the respective configurations of the time measuring means 37 and the water reserving prohibition control unit 38 are the same as those of the time measuring means 37 and the water replenishment prohibiting control unit 38 shown in the above-described embodiment, a duplicate description thereof is omitted.

The tapping water amount detecting section 43 takes in the switching information of the switching means 14 moment by moment, and when it detects that the tapping is started based on the information, the tapping water flow detecting means 40 detects the tapping flow after the tapping is started. The flow rate of the discharged hot water was fetched moment by moment, the fetched flow rate was integrated, and the amount of hot water discharged after the hot water was started was detected. Based on the switching information of the switching means 14, the completion of the hot water was detected. At this time, the information of the obtained hot water quantity is output to the water replenishment control unit 36.

The water replenishment control unit 36 fetches the switching information of the switching means 14 from time to time, and based on the information, when it detects that the water supply is stopped after the release signal is output from the water replenishment prohibition control unit 38, Judging that the bathtub water level has decreased and it is necessary to refill the water,
The valve 4 is opened to supply hot water produced by the hot water supply / burning device 32 to the bathtub 2 through the hot water filling passage 33 to start refilling the bathtub. Simultaneously with the start of rehydration, the rehydration control unit 36 issues a rehydration water amount detection command to the rehydration water amount detection unit 44.

When the replenishment water amount detection command is applied, the replenishment water amount detection unit 44 captures the flow rate of the replenishment water detected by the replenishment flow rate detection unit 41 after the rehydration starts, and integrates the captured flow amount. Then, the amount of water refilled into the bathtub 2 after the start of rehydration is detected.

After issuing the water replenishment water amount detection command to the water replenishment water amount detection unit 44, the water replenishment control unit 36 fetches the information of the water replenishment water amount detected by the water replenishment water amount detection unit 44 from time to time. Comparing with the hot water quantity received from the hot water quantity detecting section 43, it is determined whether or not the refilling water quantity has reached the hot water quantity, and when the refilling water quantity has reached the hot water quantity, the hot water quantity used for hot water is determined. Hot water supply combustion equipment 32
Is determined to have been replenished, and the replenishment valve 34 is closed to terminate the water replenishment operation.

According to this embodiment, in addition to the 24-hour bath apparatus 1 shown in each of the above embodiments, a configuration is provided in which the amount of bath water reduced by tapping water is automatically supplied.
Not only can the epoch-making effect obtained from the configuration of the 24-hour bath apparatus 1 shown in each of the above embodiments be obtained, but also the amount of bath water reduced by tapping can be automatically replenished. It is possible to keep the bathtub water level at a level that allows comfortable bathing without bothering the human hands, so that bathing can be performed comfortably at any time.

Hereinafter, a sixth embodiment will be described. What is characteristic of the constantly changing bath water changing system of this embodiment is that the hot water supply time required for replenishing the bath tub hot water reduced by hot water supply by the hot water supply means is determined, and water replenishment is performed based on the determined hot water supply time. The control device 11 includes a data storage unit 24, a water replenishment control unit 36, a time measuring unit 37, and a hot and cold water supply time detection unit 45, as shown by a solid line in FIG. Have been. Other configurations are the same as those of the constantly changing bath water replacement system shown in each of the above embodiments, and redundant description of the common parts will be omitted.

The time measuring means 37 has a structure for measuring the elapsed time from the start of hot water supply based on the switching information of the switching means 14, as shown in each of the above embodiments. 36 detects the start of hot water supply based on the switching information of the switching means 14, opens the replenishing valve 34, and starts water supply to the bathtub 2. In this way, the refill valve 3 is set at the same time
When the valve 4 is opened to start water replenishment, the hot water flow rate is configured to be larger than the water replenishment flow rate. With this configuration, the hot water overflows from the bathtub even when both hot water replenishment and replenishment are performed. Can be avoided.

The hot and cold water supply time detecting section 45 detects the flow of hot water based on the switching information of the switching means 14 and thereafter detects the flow rate detected by the hot water flow rate detecting means 40 and the flow rate detected by the replacement water flow rate detecting means 41. The flow rate to be discharged is taken in and the flow rate Rs of hot water and the flow rate Rh of replacement water are detected.

For example, after the flow of the hot water is stabilized after the start of hot water supply, the detected flow rate of the hot water flow detecting means 40 is taken in and detected as the hot water flow rate Rs. The detected flow rate of the flow rate detecting means 41 is taken in and detected as the rehydration flow rate Rh. Alternatively, after the flow of the hot water is stabilized after the start of the hot water supply, a plurality of detected flow rates of the water replenishment flow rate detecting means 41 are taken at predetermined time intervals, an average value of the taken-in flow rates is obtained, and the average value is set as the hot water flow rate Rs. Similarly, after the rehydration flow is stabilized after the start of rehydration, a plurality of detected flow rates of the rehydration flow rate detection means 41 are taken in at predetermined time intervals, and an average value of the taken-in flow rates is obtained. May be detected as the flow rate Rh.

The hot and cold water supply time detecting section 45 is provided with the switching means 1
When the completion of tapping is detected based on the switching information of No. 4, information on the time measured by the time measuring means 37 is taken in, the time Tf during which tapping was performed is taken in, and the tapping time Tf and the tapping time as described above are taken. The hot water supply time required to replenish the bathtub hot water reduced by hot water supply is detected as the replenishment time P based on the hot water flow rate Rs and the rehydration water amount Rh detected during the hot water supply.

More specifically, for example, an arithmetic expression data such as that shown in the following equation (1) for detecting the replenishment time P based on the tapping time Tf, the tapping flow rate Rs and the water replenishing water amount Rh is determined in advance. It is stored in the data storage unit 24 as detection data.

P = (Rs / Rh) × Tf (1)

The above equation (1) was derived as follows. During the time Tf, tapping is performed, and the tapping flow rate during the tapping period is the flow rate Rs. If the tap water is supplied to the bathtub 2 at the flow rate Rh together with the tapping, when tapping is completed, The replenishment hot water amount Qp required to raise the bathtub water level to the above water level can be obtained according to an arithmetic expression of Qp = (Rs−Rh) × Tf. When water replenishment is continuously performed with the flow rate Rh after the stoppage of hot water supply, the above-described replenishment hot water amount Qp is set in the bathtub 2.
Tr = Qp / Rh =
((Rs−Rh) × Tf) / Rh = (Rs / Rh) × T
f-Tf.

Since the water replenishment operation is performed from the start of tapping, the time obtained by adding the tapping time Tf to the above time Tr is equal to the replenishment time P required to replenish the amount of hot water reduced by tapping.
Therefore, the above equation (1) is derived.

The hot water supply time detecting section 45 detects the hot water supply time Tf taken from the time measuring means 37, the hot water flow rate Rs during hot water tapping, the supplementary water flow rate Rh, and the replenishment time detection data in the data storage section 24. Is detected.

[0125] The hot water supply time detecting section 45 outputs the hot water supply time P, which is the hot water supply time detected as described above, to the water replenishment control section 36. The time measuring means 37 continues to drive the clock mechanism even after the tapping is completed.
After the end of hot water supply, the measuring time of the time measuring means 37 is fetched moment by moment, and the fetched measuring time is used as the supply time P detected by the hot water supply time detecting section 45.
It is determined whether or not the measurement time has reached the supply time P.

When the water replenishment control unit 36 determines that the time measured by the time measuring means 37 has reached the replenishing time P, it determines that the bath water reduced by the hot water supply could be replenished,
The replenishing valve 34 is closed to end the water supply to the bathtub 2.

When the water replenishment control unit 36 detects that the hot water is started again based on the switching information of the switching means 14 during the water replenishment after the hot water is stopped, the replenishment valve 34 is kept open. The time from when the last hot water is started to when the present hot water is started is detected based on the time measured by the time measuring means 37, and the remaining time until the replenishment time P is reached based on the measured time is left. The replenishment time X is detected and stored in the data storage unit 24.

The time measuring means 37 stops and resets the timepiece mechanism when it detects that hot water has been started, and again starts measuring the elapsed time from the start of hot water.

The hot water supply time detecting section 45 detects the replenishment time P when the stop of hot water is detected as described above.
When the remaining supply time X is stored in the data storage unit 24, a time obtained by adding the remaining supply time X to the detected supply time P is output to the water replenishment control unit 36 as the replenishment time P. 36 controls water replenishment in the same manner as described above based on the added replenishment time P.

[0130] The water refilling system for a constantly bathable bath shown in this embodiment is configured as described above.
A control operation example of the water replacement system when the 24-hour bath apparatus 1 shown in the first embodiment is employed will be briefly described based on the flowcharts of FIGS. 10 and 11.

First, while the temperature of the hot water in the bathtub 2 is being maintained, in step 201, the tapping control unit 20 determines whether or not the tapping command means 15 has been operated to issue a tapping command. When it is determined that the command has not been issued, the warming state of the bath is continued, and when it is determined that the tapping command has been issued, in step 202, the hot water blocking unit 22
Determines whether or not the bathtub water level is equal to or higher than the lower limit value M of the bathing start allowable bathtub water level range based on the monitoring information of the water level monitoring unit 25. When it is determined that the bathtub water level is lower than the lower limit value M, the tapping prevention unit 22 determines that the tapping cannot be started, and prevents the tapping start. An error is notified (displayed) that the tapping cannot be started.

When a tapping command is issued and it is determined in step 202 that the bathtub water level is equal to or higher than the lower limit M, in step 203, the tapping control unit 2
1 interrupts the circulation pump 3 by the pump drive control unit 23, and in step 204, the switching means 14 (three-way valve)
Is switched from the circulation side to the tapping side, and in step 205, the drive of the circulation pump 3 is restarted to start tapping of the bathtub hot water. At the same time as the start of tapping, the time measuring means 37 drives the built-in clock mechanism to start measuring the elapsed time T from the start of tapping.

Next, at step 206, the water replenishment control unit 36
Determines whether or not the supply valve 34 is open, and when it is determined that the supply valve 34 is closed, at step 207, the supply valve 34 is opened and the hot water supply combustion device 32 Hot water is supplied to the bathtub 2 through the hot water passage 33.

In step 208, the hot water supply forcible stop unit 27 determines whether or not the bathtub water level is equal to or higher than the lower limit value L of the bathtub allowable bath water level range based on the monitoring information of the water level monitoring unit 25. When it is determined that it is L or more,
It is determined that it is possible to continue the tapping of the bathtub hot water, and the tapping of the bathtub hot water is continued.

Then, at step 209, hot water control section 2
1 determines whether or not the tapping instruction means 15 has been operated to issue a tapping stop command. If it is determined that the tapping stop command has not been issued, the determination operation of step 208 is repeated to set the bathtub water level. Monitor.

When it is determined in step 209 that the tapping control unit 21 has issued the tapping stop command,
In step 210 shown in FIG. 19, the driving of the circulation pump 3 is interrupted by the pump drive control unit 23, and the hot and cold water supply time detection unit 45 calculates and calculates the supply time P.
Then, the tapping control unit 21 switches the switching means 14 (three-way valve) from the tapping side to the circulation side, and in step 212, the drive of the circulation pump 3 is restarted, and the bathtub hot water circulation is restarted.

Thereafter, in step 213, it is determined whether or not a tapping command has been issued again by tapping command means 15, and if it is determined that there is no request for tapping, step 2 is executed.
At 14, the water replenishment control unit 36 determines whether or not the time T measured by the time measuring means 37 has reached the replenishment time P. Measurement time T
Is determined to have not reached the replenishment time P, the determination operation of step 213 is repeated, and
When it is determined that the measuring time T has reached the replenishing time P by the determining operation of step 215, it is determined in step 215 that replenishment of the bathtub hot water amount reduced by tapping has been completed, and
At the same time, the replenishment valve 34 is closed to end the water replenishment, and at the same time, the time measuring means 37 resets the built-in clock mechanism, and repeats the operation from step 201 on.

If it is determined in step 213 that the hot water supply command is issued from the hot water supply instruction means 15 while the water replenishment operation is continued after the hot water supply is stopped, the flow proceeds to step 216 where water replenishment control is performed. The unit 36 calculates the remaining time until reaching the supply time P as the remaining supply time X, and the time measuring means 37 resets the clock mechanism. Then, the operation after step 202 is repeatedly performed.

When the remaining supply time X is calculated at the start of tapping as described above, after the tapping is stopped, at step 214, the time T measured by the time measuring means 37 is changed to the remaining supply time X. It is determined whether or not the considered supply time P (P + X) has been reached.

According to this embodiment, in addition to the 24-hour bath apparatus 1 shown in each of the above embodiments, a configuration is provided in which the amount of bath water reduced by tapping water is automatically supplied.
As shown in the above embodiments, it is possible to obtain both the effect that it is possible to take a more sanitary bath and the effect that it is possible to provide comfortable shower use. In addition to the epoch-making effect, the amount of hot water reduced by tapping can be automatically replenished, so that the bathtub water level can be maintained at a level that allows comfortable bathing without the need for human intervention. You can always enjoy bathing comfortably.

Hereinafter, a seventh embodiment will be described.

By the way, the hot water discharged from the hot water passage 12 is usually assumed to be used in a bathroom washing room.
It is conceivable that a person immersed in a bath performs massage by shower hot water pressure by applying hot water from the hot water passage 12 to a shoulder, a neck, or the like. In this case, the hot water discharged from the hot water passage 12 returns to the bathtub 2, so that the fifth and sixth hot water are discharged.
As shown in the embodiment, when replenishment of bath water is performed based on the amount of hot water and the replenishment time P, the hot water may overflow from the bathtub 2.

Therefore, in this embodiment, a configuration example for avoiding the above-described problem that hot water overflows from the bathtub 2 due to water replenishment will be described. In this embodiment, the fifth
Alternatively, in addition to the configuration of the sixth embodiment, the shower head 13 is provided with a usage mode switching unit 46 indicated by a chain line in FIG. 4 for manually notifying the usage mode of hot water.
Alternatively, as shown by a chain line in FIG.
And a water replenishment prevention unit 48 are provided in the control device 11. In the description of this embodiment, the same reference numerals are given to the same components as those of the above-described embodiments, and the overlapping description of the common portions will be omitted.

The use mode switching means 46 has, for example, a configuration in which the user of the shower manually switches between using the hot water discharged from the hot water passage 12 as a shower in a washing room or for massage in a bathtub. When the selection is switched to the side to be used in the bathtub 2, a bathtub return hot water detection signal indicating that the hot water discharged from the hot water passage 12 is used to enter the bathtub 2 is sent to the bathtub return hot water detection unit 47. Output.

When the bathtub return hot water detection signal is added, the bathtub return hot water detection unit 47 determines that the hot water discharged from the hot water passage 12 is returning to the bathtub 2 and outputs a bathtub return hot water detection signal to the water replenishment prevention unit 48. I do.

When the bathtub return hot water detection signal is added, the water replenishment prevention unit 48 detects that hot water discharged from the hot water supply passage 12 returns to the bathtub 2, and when hot water is supplied from the hot water filling passage 33 in this state, the bathtub is stopped. Since there is a possibility that the hot water in 2 may overflow, it is determined that it is necessary to prevent water refilling of bathtub 2 by rehydration control unit 36, and a rehydration prevention signal is output to rehydration control unit 36.

When the water replenishment prevention signal is added, the water replenishment control unit 36 determines that there is a risk that hot water may overflow from the bathtub 2 due to water replenishment, and does not perform the water replenishment operation.

According to this embodiment, there is provided a structure capable of detecting that hot water discharged from the hot water supply passage 12 is used in a form of entering the bathtub 2.
When it is detected that the hot water discharged from the hot water is used in such a manner as to enter the bathtub 2, the water replenishment is prevented. The bathtub return hot water problem that hot water overflows from the bathtub 2 due to water refilling can be reliably avoided.

[0149] Since it is considered that the hot water that has been taken out is used in a form that returns to the bathtub 2 very rarely, there is almost no problem even if the above-mentioned configuration for avoiding the bathtub return hot water supply is not provided. Although it is considered that there is no such a bath, the bather can enjoy bathing more comfortably by providing the above configuration.

Hereinafter, an eighth embodiment will be described. In this embodiment, another example for avoiding the bathtub return hot water problem shown in the seventh embodiment will be described. In the eighth embodiment, in addition to the control structure of the water replacement system shown in each of the above embodiments, a water supply forced stop unit 50 is provided as shown by a dotted line in FIG. 8 or FIG. The other configuration is the same as the configuration of each of the above-described embodiments, and the description thereof will not be repeated.

While the water refilling forced stop unit 50 detects that water refilling is being performed based on the operation information of the water replenishment control unit 36, the bathtub water level is set to a predetermined water level based on the water level detection means 16 or the water level monitoring unit 25. When it is determined that the water level has reached (for example, the holding water level H), if the water refilling is continuously performed, the hot water may overflow from the bathtub 2. Therefore, it is determined that the water refilling needs to be forcibly terminated. The forced stop signal is output to the water replenishment control unit 36.

When the water replenishment control unit 36 receives the forced water replenishment stop signal, it closes the replenishment valve 34 to forcibly end the water replenishment operation, and prevents the hot water from overflowing from the bath tub 2 by returning to the bath tub. .

According to this embodiment, the water level detecting means 16 determines that the water level reaches a predetermined level when water refilling is performed.
Since the water supply is forcibly stopped when the water is detected based on the hot water, the problem caused by the returning hot water from the bathtub can be surely avoided.

The ninth embodiment will be described below.

By the way, the water replacement system shown in each of the sixth and seventh embodiments has a configuration in which hot water having a reduced bath water level by hot water supply is supplied by hot water supply means.
When the bather draws out and uses the bathtub hot water and the bathtub water level decreases, water refilling is not performed. Therefore, when a large amount of hot water is pumped out by the bather, the bathtub water level may be lower than the lower limit M of the bathing start bathtub water level range. In the case where the tapping prevention unit 22 is provided, if the bathtub water level is lower than the lower limit M as described above, the tapping prevention operation of the tapping prevention unit 22 prevents the start of tapping, and the bathtub water supply is stopped. Can not be started.

Therefore, in this embodiment, in addition to the configuration of the always-bathable bath water exchange system shown in each of the above-described embodiments, a hot-water discharge prevention release section 51 is provided as shown in FIG. However, when tapping is requested in a state where the temperature is lower than the lower limit M, the water supply to the bathtub 2 is performed and the bathtub is raised to a bathtub water level equal to or higher than the lower limit M to enable tapping. . The other configuration is the same as that of each of the above embodiments, and the overlapping description of the common parts will be omitted.

When the tapping release unit 51 detects that the start of tapping has been prevented due to insufficient water level, although the tapping is requested, based on the operation information of the tapping control unit 21 and tapping prevention unit 22, Bathtub 2 to start
It determines that it is necessary to supply hot water, and outputs a rehydration start signal to the rehydration control unit 36.

When the water replenishment start signal is applied, the water replenishment control unit 36 opens the replenishment valve 34 to open the hot water supply combustion equipment 32
Is supplied to the bathtub 2 through the hot water passage 33.

After the water replenishment start signal is issued, the water replenishment release unit 51 replenishes the water with the water replenishment control unit 36 and sets a predetermined water level (for example, the holding water level H) that is equal to or higher than the lower limit value M of the water bath start allowable bathtub water level range. When the bath level is detected by the water level detecting means 16 or the water level monitoring unit 25, it is determined that the water level has risen to a level at which hot water can be started, and a hot water release signal is output to the hot water blocking unit 22. .

When the tapping release signal is applied, tapping prevention section 22 releases the tapping prevention operation, and enters a state in which tapping can be started.

After the rehydration control section 36 starts rehydration by applying the rehydration start signal, the rehydration control section 36 sets the predetermined water level (for example, the holding water level H) equal to or higher than the lower limit M of the bathing start allowable bath water level range by the rehydration. When the water level detecting means 16 or the water level monitoring unit 25 detects that the bathtub water level has been reached, the replenishment valve 34 is closed and the water replenishment operation is terminated.

According to this embodiment, the water level detecting means 1
When the water replenishment control based on No. 6 is not performed, when the start of hot water is prevented by the hot water prevention part 22 and the hot water cannot be started, the bath tub is rehydrated to raise the water level to a level at which hot water can be started. Therefore, water refilling is automatically performed up to the water level at which the tapping can be started, and the tapping can be started.

Note that the present invention is not limited to the above embodiments, but may employ various embodiments. For example, the water level detecting means 16 shown in each of the above embodiments has an electrode rod, but a water level detecting means of a type that detects a bathtub water level by water pressure may be used. When the water level detecting means for detecting the bathtub water level by the water pressure is employed, the data of the lower limit value M of the bathing start allowable bathtub level range, the lower limit value L of the bathtub allowable bathtub level range and the holding water level H are stored in the data storage unit 24. It is stored in advance, and based on the data and the information on the detected water level detected by the water level detecting means, a comparison / judgment as to whether the bathtub water level is equal to or higher than the lower limit values M and L, and the bathtub water level reaches the holding water level H The comparison / judgment of whether or not is performed is performed.

In each of the above embodiments, the water level assumed to be desired when the bather takes a bath is set to the full water level H.
However, any other water level may be set as the full water level H.

Further, in the 24-hour bath apparatus 1 shown in each of the above embodiments, as shown in FIG.
And the heating means 8 and the sterilizing means 10 are provided in the portion of the circulation passage 6 between the circulation pump 3 and the switching means 14,
The dust removing means 7, the heating means 8, and the sterilizing means 10 may be provided in the portion of the circulation passage 6 upstream of the switching means 14, and among the dust removing means 7, the heating means 8, and the sterilizing means 10, One or more may be provided upstream of the circulation pump 3. When the dust removing means 7 is provided in the portion of the circulation passage 6 on the suction port side of the circulation pump 3, dust can be prevented from entering the inside of the circulation pump 3, and the circulation pump 3 can be prevented from being caused by the dust. The problem of failure can be avoided.

Further, in each of the above embodiments, the dust removing means 7, the heating means 8 and the sterilizing means 10 are arranged in this order from the upstream side. The arrangement order is set appropriately,
The arrangement order is not limited to that shown in FIG.

Further, in each of the above embodiments, the dust removing means 7 is provided in the circulation passage 6. However, for example, a dust removing means for removing dust in the bath water is provided in a place other than the circulation passage 6. In such a case, the dust removal means 7 need not be provided in the circulation passage 6. Further, in each of the above embodiments, the sterilizing means 10 is provided in the circulation passage 6,
For example, when a sterilization means for sterilizing bacteria in bath water is provided in a place other than the circulation passage 6, the circulation passage 6 may be used.
It is not necessary to provide the sterilization means 10 in the apparatus.

Further, in each of the above embodiments, the hot water instructing means 15 is provided on the shower head 13, but the disposing position of the hot water instructing means 15 is appropriately set, and is limited to the shower head 13. It is not something to be done. However, it is desirable to provide the hot water instructing means 15 in a place where it is easy for the hot water requester (shower user) to manually issue the hot water issuing command. For example, when the shower is used, the range that the shower user can reach is desired. Assuming that the hot water supply instruction means 15 may be provided on the wall of the bathroom in the range.

Further, in each of the above embodiments, a three-way valve is used as the switching means 14. However, the switching means 14 may have any structure capable of switching between the circulation side water flow and the tapping side water flow. It is not limited to a three-way valve. For example, an opening / closing valve for opening / closing the hot water supply passage 12 is provided, and an opening / closing valve for opening / closing the passage is provided in the circulation passage 6 downstream of a connection portion between the circulation passage 6 and the hot water passage 12. The switching means 14 may be constituted by the on-off valves of the passage 6 and the hot water passage 12. In this case, the opening / closing valve of the circulation passage 6 is opened and the hot water passage 12
By closing the on-off valve, the bathtub hot water is switched to the circulation-side water flow, and the bathtub hot water is switched to the tapping-side water flow by closing the on-off valve of the circulation passage 6 and opening the on-off valve of the tapping passage 12. . In such a case, since the water flow can be switched smoothly without switching the bath water flow after the circulation pump 3 is interrupted, the interruption / restart control of the circulation pump 3 is performed when the bath water flow is switched. It is not necessary.

Further, in the third embodiment, the capacity of the circulation pump 3 when circulating bath water and the capacity of the circulation pump 3 when circulating bath water are variably controlled. A configuration has been described in which the hot water flow rate can be controlled so that the hot water flows at a desired flow rate as the shower hot water flow rate. However, for example, in order to control the flow rate to the circulation passage 6 downstream of the circulation pump 3 Instead of performing flow control by variably controlling the capacity of the circulating pump 3, the circulating flow rate and tapping flow rate may be variably controlled by the flow rate control means.
2 may be provided with flow rate control means for controlling the flow rate of hot water, and the flow rate control means may control the flow rate of hot water.

Further, in each of the above embodiments, the tapping flow rate detecting means 40 is provided to obtain the tapping flow rate of tapping water from the tapping passage 12, and the tapping flow rate is obtained by actual measurement by the tapping flow rate detecting means 40. Can be assumed in advance depending on the capacity of the circulation pump 3 and the like.
The flow rate may be obtained in advance by experiments, calculations, or the like, and stored in the data storage unit 24, and the flow rate of the hot water may be obtained from the flow rate data of the hot water in the data storage unit 24. In this case, the hot water supply time detecting section 45 determines the hot water supply time (replenishment time P) by using the information of the hot water flow rate in the data storage section 24.

Further, in each of the above embodiments, when obtaining the replenishment flow rate to be supplied to the bathtub 2, the replenishment flow rate detecting means 41 is used.
Although the replenishment flow rate was obtained by actual measurement by the replenishment flow rate detection means 41, the replenishment flow rate can be estimated in advance by tap water pressure or the like. In addition, the water replenishment flow rate may be obtained from the water replenishment flow rate data in the data storage unit 24. In this case, the hot water supply time detecting section 45 determines the hot water supply time (replenishment time P) using the information on the replacement water flow rate in the data storage section 24.

Further, in each of the above embodiments, the water refilling flow rate detecting means 41 for detecting the flow rate of the water refilling supplied to the bathtub 2 is provided in the hot water filling passage 33. However, the flow rate detecting means capable of detecting the water refilling flow rate is provided. In the case of being incorporated in the hot water supply combustion device 32, it is possible to obtain the replenishment flow rate actually measured by the flow detection device built in the hot water supply combustion device 32 without providing the water supply flow rate detection means 41 in the hot water filling passage 33. In such a case, the replenishment flow rate detecting means 41
May be omitted.

Further, in the water replacement system shown in each of the above embodiments, the hot water supply means has a hot water supply / burning device 32, a hot water filling passage 33, and a supply valve 34. Was supplied to the bathtub 2,
For example, a water supply passage for guiding water from a water supply source to the bathtub 2 is provided, and a supply valve which is an open / close valve for supplying / stopping water is provided in the passage. Hot water supply means is provided by the water supply passage and the supply valve. In this case, the unheated water may be directly supplied to the bathtub 2.

Further, in each of the above embodiments, the hot water discharged from the hot water passage 12 is used as a shower. However, the usage form of the hot water is not limited to the shower. You may guide it to a machine and use it as hot water for washing. Further, the hot water passage 12 may be guided to the outside of the building, and the hot water discharged from the hot water passage 12 may be used to wash dirt such as athletic shoes. Further, the hot water supply passage 12 may be guided to a toilet, and the bath water may be used as hot water for flushing a toilet bowl.

The control of the circulating pump 3 and the switching means 14 may be performed as follows, including the case where the bathtub hot and cold water is used in a washing machine and a toilet as described above. For example, as shown in FIG. 14 (a), a pressure sensor 76 is provided in the hot water passage 12 for guiding bath water to a hot water place 75 such as a shower, a washing machine or a toilet. When hot water from a shower, a washing machine, a toilet, or the like is started, and the pressure value detected by the pressure sensor 76 rapidly decreases as indicated by (β) in FIG. It is determined that the tapping has been started due to the rapid drop change, and the switching means 14 is controlled to switch to the tapping side as shown by (α) in FIG. At the time of switching of the switching means 14, the circulating pump 3 is controlled to a stopped state. After that, as shown in (γ) of FIG.
The drive of the circulation pump 3 is started. When the use of hot water is finished and the detection value of the pressure sensor 76 rises and changes as shown in (β) of FIG. 14B, and the detected pressure value reaches the set pressure of the hot water supply stop state. It is determined that the hot water is completely discharged, and the switching means 14 is switched and controlled as shown in (α) and (γ) of FIG. 14B, and the drive of the circulation pump 3 is stopped. As described above, the start and stop of tapping may be automatically detected by using the pressure sensor provided in tapping passage 12, and switching control of switching means 14 and control of circulation pump 3 may be performed. . FIG.
Numeral 78 shown in (a) represents a check valve for preventing backflow from the hot water outlet side.

Furthermore, the control components such as the water replenishment control unit 36 in the bath water replacement system shown in each of the above embodiments have been provided in the control device 11. May be formed in a control device built in the remote controller,
May be formed in a control device that performs the operation control of.

Further, each of the above embodiments is the same as that shown in FIG.
Although the four-hour bath apparatus 1 has been described as an example, the present invention can also be applied to a constantly bathable bath apparatus having a pipe configuration other than the 24-hour bath apparatus 1 shown in FIG. For example,
The present invention can be applied to an always-bathable bath apparatus provided with both a bath function and a hot water supply function as shown in FIG.

The always bathable bath apparatus shown in FIG. 13 has a burner 55 for hot water supply and a burner 56 for reheating.
Gas supply passages 57 and 58 for guiding the fuel gas are connected to the burners 55 and 56, respectively, and the burners 55 and 56 are supplied with the fuel gas supplied from the gas supply passages 57 and 58, respectively.
56 burns. A hot water supply heat exchanger 60 and a reheating heat exchanger 61 for heating water flow by the burner combustion heat of each of the burners 55 and 56 are provided.
A water supply passage 62 is provided on the inlet side of the hot water supply heat exchanger 6.
A hot water supply passage 63 is provided on the outlet side of the hot water supply 0, and the hot water supply heat exchanger 60 converts the water supplied from the water supply passage 62 into a burner 55.
The hot water is heated by the heat of combustion to produce hot water, and the hot water is supplied to a desired hot water supply place such as a kitchen through the hot water supply passage 63.

A passage 6 connecting the entrance of the heat exchanger 61 and the bathtub 2 is provided at the entrance of the reheating heat exchanger 61.
4 is connected, and a passage 65 that connects the outlet side of the heat exchanger 61 and the bathtub 2 is connected to the outlet side of the reheating heat exchanger 61. The circulation pump 3 is interposed in the passage 64, and the hot water of the bathtub 2 is drawn into the passage 64 by the driving of the circulation pump 3, and the hot water of the bathtub 2 is reheated by the reheating heat exchanger 61 and heated. Return to bath 2 via 65. The passage 64, the reheating heat exchanger 61 and the passage 65
And the circulation pump 3 constitute a circulation passage 6. This circulation passage 6 has dust removing means 7 for removing dirt from the hot water and sterilizing means 10 for sterilizing various bacteria in the hot water.
And are interposed.

The hot water supply passage 63 and the circulation passage 6 are connected to each other by a hot water filling passage 66.
6 is provided with a pouring control valve 67 for opening and closing the passage, and a water level detecting means 16 for detecting a bathtub water level by water pressure.

In the circulation passage 6, temperature detecting means 68 for detecting the temperature of the circulating water flow in the passage 6 as a bath temperature.
The water supply passage 62 is further provided with a water temperature detection means 70 for detecting the temperature of water entering the hot water supply heat exchanger 60.
The hot water supply passage 63 is provided with hot water temperature detecting means 71 for detecting the temperature of hot water flowing out of the hot water heat exchanger 60. Further, the water supply passage 62 is provided with a water amount sensor 72 which can detect the flow of water through the passage.

This device is provided with a control device 73 for controlling the operation of the device, and a remote controller 74 for signal connection to the control device 73 is provided. The remote control 74 is provided with hot water temperature setting means for setting the temperature of hot water supplied to a hot water supply place such as a kitchen, and bath temperature setting means for setting a bath temperature.

When the hot water tap at the end of the hot water supply passage 63 led to the kitchen or the like is opened and the water flow is detected by the water amount sensor 72, the control device burns the burner 55, for example. Thus, the combustion capacity is controlled so that the temperature of the hot water produced by the hot water supply heat exchanger 60 becomes the hot water temperature set in the hot water temperature setting means of the remote controller 74. Then, when the stop of water flow is detected, the burner combustion is stopped and the hot water supply operation is terminated.

When a hot water filling command for the bathtub 2 is applied, the pouring control valve 67 is opened, and when the water flow is detected by the water amount sensor 72 by this opening, the hot water supply heat exchanger is operated in the same manner as described above. When the hot water is made at 60 and the hot water is dropped into the bathtub 2 through the hot water filling passage 66 and the circulation passage 6 in order, and the bath is filled with water, and the desired bathtub water level is reached based on the water level detecting means 16. Then, the pouring control valve 67 is closed, and the filling is finished.

[0186] Further, with the bath water being spread,
The circulating pump 3 is driven to circulate the bath water through the circulation passage 6, and when it is detected that the temperature of the bath detected by the temperature detecting means 68 is lower than the set temperature, the burner 56 is burned to follow up. The water flowing through the boil heat exchanger 61 is heated to raise the temperature of the bath, thereby keeping the bath warm, so that the bath can always be maintained.

[0187] The bath apparatus which can be always bathed as described above also has
The present invention can be applied. For example, as shown by a dotted line in FIG.
Hot water passage 12 is connected to the hot water passage 12 and the circulation passage 6.
The switching part 14 as shown in each of the above embodiments is provided at the connection portion of the above, and the control configuration shown in each of the above embodiments is provided in the control device 73 so that the bathtub hot water can be discharged through the hot water passage 12. It is possible. In addition, the opening and closing control of the pouring control valve 67 is performed so that the bathtub 2 is controlled.
In this case, hot water is supplied by the hot water supply heat exchanger 60, the water supply passage 62, the hot water supply passage 63, the hot water supply passage 66, the pouring control valve 67, and the circulation passage 6. Is configured.

It is to be noted that the present invention can be applied not only to a home-use always-bathable bath, but also to a large-sized business-useable bath.

Further, in each of the above embodiments, a water level different from the lower limit M of the bathing start allowable bathtub water level range and the lower limit L of the bathing allowable bathtub water level range is set. L may be the same water level.

Further, in each of the above-described embodiments, the outlet of the hot water passage 12 is one. However, for example, the outlet side of the hot water passage 12 may be branched into a plurality of outlets so that hot water can be discharged at a plurality of locations. Good. In this case, opening / closing means for opening / closing the passages is provided in each branch passage of the hot water passage,
It is desirable that the opening / closing means be capable of tapping / stopping for each branch passage.

[0191]

According to the present invention, a tapping water passage is connected to a circulation passage for circulating bathtub hot water, and a tapping water flow through which the bathtub hot water flows from the circulation passage through the tapping passage, and a bathtub hot water flowing through the circulation passage. Since the switching means for switching between the circulating side water flow to be circulated is provided, the temperature of the bath tub is kept warm by the heating means provided in the circulation passage, so that the bath can be always maintained in a bathable state. By switching the bathtub hot water flow from the circulation-side water flow to the tapping-side water flow, the bathtub hot water can be discharged from the hot water passage.

By providing such a configuration that the bathtub hot water can be taken out and used effectively, the bathtub hot water is used by the bather in some cases, and the other is used by tapping. It is possible to greatly increase the amount of reduced use of bathtub hot water as compared to just using and pumping out bathers, so that it is possible to significantly improve the rate of bathtub hot water conversion, A more sanitary bath can be maintained for a long time.

In the apparatus having a structure in which a tapping command means for manually issuing a tapping command is provided,
By simply operating a switch or button at hand at a place where a user of hot water uses the hot water, it is possible to easily issue a hot water supply command, which is excellent in convenience.

When the switching means is provided with a switching operation section and the switching operation section is manually operated to switch the switching means, only the switching operation section is manually operated. simply,
Since the flow of the bathtub hot water can be switched, a control configuration for switching control of the switching means is not required, and the control configuration can be simplified.

In the apparatus having a configuration in which the dust removing means is provided in the circulation passage portion on the upstream side of the connection portion with the hot water passage, the hot water from the bathtub from which the dust has been removed is discharged through the hot water passage. Therefore, it is possible to supply clean water free of refuse. Further, in a device having a configuration in which sterilization means is provided in a circulation passage portion on the upstream side of a connection portion with a hot water passage, clean hot water in which germs such as Escherichia coli are sterilized is discharged. Can be.

In the case where the shower head is attached to the outlet of the hot water passage, hot water discharged from the hot water passage can be used as hot water for the shower. This hot water is spouted from the shower head at a flow rate due to the discharge capacity of the circulation pump, and the spout flow rate can be set to a flow rate at which the shower user can use the shower comfortably. A comfortable shower use can be provided to the user.

On the other hand, for example, when hot water produced by a water heater or the like is discharged as hot water for a shower, the flow rate of the hot water is determined based on the tap water pressure and the like. Since the number of showers is much less than that, it was unsatisfactory for the user of the shower, and many people were dissatisfied with the weakness of the shower, but in the present invention, as described above, the discharge of the circulation pump Since the hot water is supplied from the shower head using the force, the hot water can be supplied from the shower head with a satisfactory jet flow rate for the user of the shower, and a comfortable use of the shower can be provided.

As described above, when hot water from a shower is supplied from a water heater or the like, it is difficult to discharge hot water having a desired hot water temperature immediately after starting hot water supply. On the other hand, in the present invention, the hot water kept in the bathtub is discharged, while the hot water has to wait for the hot water temperature to stabilize. Since they are almost equal, it is possible to obtain an excellent effect that hot water having a desired hot water temperature can be provided by a shower user immediately after the start of hot water supply.

When the shower water is supplied from the water heater or the like as described above, the desired hot water cannot be discharged immediately after the start of the hot water supply, and the desired hot water temperature cannot be maintained. You have to wait for the hot water to run out
In contrast, the hot water discharged during that time was wasted and discarded, whereas in the present invention, as described above, the hot water at the desired hot water temperature can be provided by the shower user immediately after the start of the hot water supply. It can save water because it is gone,
Wasted time until the hot water temperature stabilizes can be eliminated.

In particular, when hot water having a desired hot water temperature is produced by manually mixing hot water produced by a water heater or the like and tap water or the like with a mixer tap or the like, until the desired hot water is produced. The time is longer and wasteful time and the amount of hot water wasted are increased. However, according to the present invention, the hot water having the desired hot water temperature desired by the shower user can be discharged immediately after the start of hot water supply. It is very convenient because it is possible to eliminate wasted time and wasted water, and it is possible to eliminate the trouble of operating a mixing tap to produce a desired hot water.

Further, when hot water from a shower is supplied from a water heater or the like as described above, the temperature of the hot water is likely to fluctuate, and many shower users are dissatisfied with the fluctuation in the hot water temperature.
On the other hand, in the present invention, since the hot water kept in the bathtub is supplied, the temperature of the supplied hot water is very stable,
The dissatisfaction with the fluctuation of the shower water temperature can be surely eliminated.

As described above, by providing a configuration in which the bath water kept warm is used as hot water for the shower, an epoch-making effect that most dissatisfaction points of many shower users can be eliminated. Obtainable.

In the case where the hot water discharged from the hot water passage is effectively used as hot water for a shower by a bather or the like,
Each time a bather takes a bath, the bath water can be replaced by about half the amount of hot water in the bathtub, the rate of water change in the bathtub can be dramatically increased, and the bathtub hot water can be maintained in the best sanitary condition for a long time. can do.

[0204] In a device having a configuration for variably controlling the capacity of the circulating pump when circulating hot and cold water in the bathtub and the capacity of the circulating pump when circulating hot water, a user of the hot water demands. Hot water can be discharged at the jet flow rate, and more comfortable use of hot water can be provided.

[0205] There is provided a tapping prevention unit for preventing tapping of bathtub water through a tapping passage while the bathtub water level is lower than the lower limit value of the bathtub start permissible bathtub water level range.
When the bathtub water level falls below the lower limit of the bathtub permissible bathwater level range during tapping, if the bathtub forced stop section is provided to forcibly stop the tapping of the bathtub hot water, this may be caused by the bathtub water level drop. Thus, it is possible to avoid a problem that air enters the circulation passage and the circulation pump runs idle due to the air, thereby causing the circulation pump to fail.

When the start of tapping is prevented by the tapping prevention section, tap water is supplied to the bathtub by the tap water supply means to raise the bathtub water level to a level not lower than the lower limit value of the bathtub start allowable bathtub water level. In the one provided with the configuration of the water refilling system of the always-bathable bath provided with the hot-water-supply releasing unit for releasing the hot-water blocking operation of the blocking unit,
The bathtub can be automatically refilled with hot water, so that the bathtub water level can be raised to a level higher than the water level at which hot water can be taken out without troublesome human intervention.

In the apparatus provided with a structure capable of maintaining the bathtub water level at a predetermined holding water level, when a bather draws hot water from the bathtub and the bathtub water level falls below the holding water level, hot water supply means is provided. Not only can water be supplied to the bathtub to raise the holding water level, but also when the bathtub water is discharged and the bathtub water level falls below the holding water level, the hot water is automatically supplied to the bathtub and held. Since the water level can be raised to a water level, it is possible to take a comfortable bath at any time, and it is possible to prevent a bather from feeling uncomfortable due to insufficient water level.

In particular, the amount of bath water reduced by tapping water is much larger than the amount of water used by drawing hot water.
By providing a configuration for refilling the bath tub every time the start of hot water is detected, the bath tub can be reliably refilled every time the hot water is discharged, giving the bather discomfort due to the lowered water level. Can be prevented.

[0209] A tap water amount detecting section is provided, and a water amount reduced by tapping based on the tap water amount detected by the tap water amount detecting section is supplied to the bathtub, or a bathtub water amount reduced by tapping is supplied to the hot water supply means. The time required for replenishment is determined by the hot water supply time detection unit, and the hot water is replenished based on the determined time. Since the water level can be automatically raised, it is possible to prevent the bather from feeling uncomfortable due to the lowered water level.

Tapping flow rate detecting means for detecting tapping flow rate;
At least one of water replenishment flow rate detecting means for detecting the flow rate of hot water supplied to the bathtub is provided, and in the apparatus having a configuration for detecting the hot water supply time based on the flow rate detecting means, Since an accurate tap water flow rate or a supplementary water flow rate can be obtained, a more accurate tap water supply time required to replenish the reduced bath water amount by tap water supply means can be detected, and the water level immediately before tap water can be accurately detected. It is possible to return.

When water supply to the bathtub is controlled based on the amount of hot water and the supply time of the hot water as described above, the water supply is continuously performed when the discharged hot water is used in the form of entering the bathtub. There is a danger that the bath tub will return and the hot water will overflow from the bath tub, but when the bath tub water level reaches a predetermined water level during the water refilling, the water replenishment operation is forcibly stopped. However, in the case where a signal indicating that the hot water is used in a form of entering the bathtub is not provided when water is supplied, it is possible to reliably avoid the bathtub return hot water problem. it can.

[0212] When the tapping is stopped before the lapse of time from the start of tapping reaches the set time, the water supply is not performed when the tapping is stopped. The water refilling operation can be prohibited when it is thought that the water refilling operation is not necessary, and as a result, the water refilling operation is not performed frequently even with a small amount of water replenishment, and the water refilling operation is performed even if the water level drop is minute. It is possible to prevent the bather from feeling uncomfortable and uncomfortable.

[0213] In the case where the hot and cold water supply means is provided with a hot water supply combustion device, the hot water of the bathing water temperature produced by the hot water supply and combustion device can be supplied to the bathtub. It is possible to reliably avoid the problem that the temperature of the bath water drops.

[Brief description of the drawings]

FIG. 1 is a model diagram showing an embodiment of a constantly bathable bath apparatus according to the present invention.

FIG. 2 is a block diagram showing an example of a control configuration of a constantly bathable bath apparatus in a case where hot water instructing means is provided and switching control of a switching means is performed based on a hot water instruction from the hot water instructing means.

FIG. 3 is a block diagram showing an example of a control configuration of a constantly bathable bath apparatus when the switching means is manually switched using a switching operation unit.

FIG. 4 is a model diagram showing an embodiment of a constantly changing bath water changing system according to the present invention.

FIG. 5 is a block diagram showing an example of a control configuration for maintaining a bathtub water level at a holding water level based on water level detection means.

FIG. 6 is a flowchart illustrating a control operation example of the control configuration illustrated in FIG. 5;

FIG. 7 is a flowchart showing a control operation example of the control configuration shown in FIG. 5 subsequent to FIG. 6;

FIG. 8 is a block diagram showing an example of a control configuration for detecting the amount of bath water reduced by tapping and replenishing the detected amount of hot water to the bathtub.

FIG. 9 is a block diagram showing an example of a control configuration for determining a time required for replenishing the bath water volume reduced by tapping by the hot water supply means and controlling replenishment to the bath tub based on the calculated time.

FIG. 10 is a flowchart illustrating an example of a control operation of the control configuration illustrated in FIG. 9;

FIG. 11 is a flowchart showing a control operation example of the control configuration shown in FIG. 9 subsequent to FIG. 10;

FIG. 12 is a block diagram showing an example of a control configuration for supplying hot water and enabling the start of tapping when the start of tapping is prevented due to insufficient water level.

FIG. 13 is a model diagram showing another example of the configuration of the pipeline of the always bathable bath apparatus.

FIG. 14 is an explanatory diagram showing another control example of the circulating pump and the switching means of the bath apparatus which can always take a bath.

FIG. 15 is a model diagram showing an example of a conventional always-bathable bath apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 24-hour bath apparatus 2 Bathtub 3 Circulation pump 6 Circulation path 7 Garbage removal means 8 Heating means 10 Sterilization means 12 Hot water passage 13 Shower head 14 Switching means 15 Hot water command means 16 Water level detection means 20 Heat retention control part 21 Hot water control part 22 Hot water supply Blocking unit 23 Pump drive control unit 27 Hot water supply forced stop unit 32 Hot water supply combustion equipment 33 Filling passage 34 Supply valve 36 Water replenishment control unit 37 Time measurement means 38 Water replenishment prohibition control unit 40 Hot water flow detection means 41 Water replenishment flow rate detection means 43 Hot water detection Part 45 Hot water supply time detection part 48 Water replenishment prevention part 50 Water replenishment forced stop part 51 Hot water discharge prevention release part

Claims (19)

[Claims] 1. A circulating passage for drawing hot water from a bathtub by driving a circulation pump and returning the hot water to the bathtub again, and heating means for heating the bathtub hot water flowing through the circulation passage, wherein the bathtub hot water is supplied to the circulation passage. In a constantly bathable bath apparatus in which the temperature of the bath is kept at a predetermined bath temperature by the above-mentioned heating means while circulating water, a discharge passage for guiding hot water to a predetermined hot water use place is connected to a circulation passage on the discharge side of the circulation pump. And a switching means for switching between a circulating-side water flow for circulating the bathtub hot water through the circulation passage and a tapping-side water flow for discharging the bathtub hot water from the circulation passage through the tapping passage. Bath equipment. 2. A tapping command means for manually issuing a tapping command is provided, and when it is detected that the tapping command is issued manually from the tapping command means, the flow of the bathtub hot water is changed by the switching means to the tapping water flow. 2. The always-bathable bath apparatus according to claim 1, further comprising a hot-water outlet control unit for switching to a hot-water bath. 3. The bath apparatus according to claim 1, wherein the switching means is provided with a switching operation section for manually switching between the circulation side water flow and the tapping side water flow. 4. A refuse removing means for removing refuse in hot and cold water flowing through the passage at a portion of the circulation passage upstream of a connection portion with the hot water discharge passage. The bath apparatus which can always take a bath according to claim 2 or 3. 5. A sterilization means for sterilizing hot and cold water flowing through the passage in a portion of the circulation passage upstream of the connection with the hot water discharge passage. The bath apparatus which can always take a bath according to claim 3 or 4. 6. The bath apparatus according to any one of claims 1 to 5, wherein a shower head is attached to an outlet of the hot water passage. 7. The circulation pump capacity data when the bathtub hot water flow is switched to the circulation side water flow and the circulation pump performance data when the bathtub hot water flow is switched to the discharge side water flow are given in advance by the switching means. 7. A pump drive control unit for variably controlling the capacity of the circulation pump based on the switching information of the switching means and the performance data of each of the circulation pumps, is provided. The always-bathable bath apparatus according to any one of the above. 8. A water level detecting means for detecting a bathtub water level; said water level detection means for detecting that the bathtub water level has dropped below a lower limit value of a predetermined bathing start allowable bathtub water level range in which hot water can be started to flow from the hot water passage. A tapping prevention unit that prevents switching from the circulating-side water flow to the tapping-side water flow by the switching means and prevents the bathtub hot water from flowing out of the tapping passage during detection based on the means. The always bathable bath apparatus according to any one of claims 1 to 7. 9. A lower limit value of a predetermined tapping allowable bathtub water level range which is provided with a water level detecting means for detecting a bathtub water level and is capable of causing tap water to flow out of the tapping passage when tap water is flowing out of the tapping passage. 9. A tapping forced stop unit for forcibly terminating tapping of bathtub hot water when it is detected by the water level detecting means that the bathtub water level has fallen further is provided. The bath apparatus capable of always taking a bath according to any one of the above. 10. The bath apparatus according to claim 8, wherein:
Hot water supply means for supplying hot water to the bathtub; and when it is detected that the switching from the circulating water flow to the hot water flow by the switching means has been prevented by the hot water supply blocking section of the always-bathable bath, the hot water supply means supplies the hot water to the bathtub. A tapping prevention canceling section for canceling the tapping prevention operation of the tapping prevention section after supplying the hot water to raise the bathtub water level to a level not lower than the lower limit of the tapping allowable bathtub water level range. A bath replacement system for bathing. 11. A bath apparatus capable of constantly taking a bath according to any one of claims 1 to 9, a hot water supply means for supplying hot water to the bathtub, and a bathtub water level previously determined based on a water level detection means for detecting a water level in the bathtub. A water replenishment control unit for replenishing the bath with hot water by means of the hot and cold water supply means to increase the bathtub water level to the above-mentioned holding water level when detecting that the water level has dropped below the predetermined holding water level;
A water refill system for a bath that is always available. 12. The water replenishment control unit, every time it detects that hot water is started from the hot water passage of the bath apparatus that can always take a bath,
The bath refill system according to claim 11, wherein hot water is supplied to the bathtub by hot water supply means. 13. An always-bathable bath apparatus according to any one of claims 1 to 9, a hot-water supply means for supplying hot and cold water to a bathtub, and an amount of hot-water supplied from a hot-water passage of the always-bathable bath apparatus. An always-bathable bath, comprising: a tapping water amount detection unit for detecting; Water replacement system. 14. An always-bathable bath apparatus according to any one of claims 1 to 9, a hot-water supply means for supplying hot and cold water to a bathtub, and tapping is started from a hot-water passage of the always-bathable bath apparatus. Time measuring means for measuring a lapse of time from time; flow rate information of hot water flowing out of the hot water passage, flow rate information of hot water supplied to the bathtub by the hot water supplying means, and information of measurement time of the time measuring means. A hot and cold water supply time detecting section for obtaining a hot and cold water supply time necessary for replenishing the amount of the bath water reduced by hot water supply with the hot and cold water supply means, based on the hot and cold water supply time detected by the hot and cold water supply time detecting section; And a water replenishment control unit for replenishing the bathtub with hot and cold water using a supply means. 15. At least one of a tap water flow rate detecting means for detecting a flow rate of hot water flowing out of the hot water supply passage and a supplementary water flow rate detecting means for detecting a flow rate of hot water supplied to the bathtub by the hot water supply means. 15. The refilling system for a constantly bathable bath according to claim 14, wherein the hot water supply time detecting section is provided to determine the hot water supply time based on the flow rate of the hot water detected by the flow rate detecting means. 16. When the water replenishment control unit detects that water is being replenished to the bathtub, the water level detecting means for detecting the bathtub water level detects that the bathtub water level has reached a predetermined upper limit water level. The water refilling system for a constantly bathable bath according to claim 13, further comprising a water replenishment forced stop unit for forcibly terminating water refilling to the bathtub when the bathing is performed. 17. A water replenishment prevention unit is provided for preventing water replenishment to the bath tub by the water replenishment control unit when a signal indicating that hot water discharged from the hot water supply passage is used to enter the bath tub is provided. 2. The method according to claim 1, wherein
The water refill system for a constantly bathable bath according to claim 3 or claim 14 or claim 15 or claim 16. 18. A time measuring means for measuring a lapse of time from the start of tapping from the tapping passage, wherein the tapping is stopped before the time from the start of tapping reaches a predetermined set time. The water replacement system for a bath which can be always bathed according to any one of claims 11 to 17, further comprising a water replacement prohibition control unit that does not perform the water replacement operation by the water replacement control unit when the water replacement is performed. 19. The hot water supply means comprises a hot water supply combustion device for producing and supplying hot water, and supplies the hot water produced by the hot water supply combustion device to the bathtub. 18. The bath refill system according to any one of 18.