JP6661971B2 - Bath tub replenisher and bath tub hot water supply system - Google Patents

Description

  The present invention relates to a bath tub replenishing water device and a bath tub hot water supply system including the same, and more particularly, to control of a hot water supply flow rate to a bath tub.

  Conventionally, a system configuration for automatically maintaining a water level in a bathtub has been used. For example, Japanese Unexamined Patent Application Publication No. 2008-100018 (Patent Document 1) discloses an automatic device for controlling the water level of a floating bathtub, which controls opening and closing of inflow valves of hot spring water and cold water according to a signal from a water level sensor. Is described.

  Japanese Patent Application Laid-Open No. H11-351664 (Patent Document 2) discloses that in a water heater with a hot water filling function for a bathtub, when the water level is higher than a reference water level according to a signal from a water level detection device of the bathtub, It is described that the pouring flow rate is controlled while fixing the combustion amount at which the maximum thermal efficiency is obtained.

JP 2008-100018 A JP-A-11-351664

  In a bathtub hot water supply system to which a bathtub replenishing water device having a water level adjusting function is applied, a configuration in which hot water supply to a bathtub and hot water supply to a hot water tap (callan / shower) in a bathroom is generally covered by a common water heater. It is a target. In addition, hot water is supplied to the bathtub when the bathtub is filled with hot water before the bath (hereinafter, also referred to as “when hot water is filled”) and when the bathtub water level drops during bathing after the hot water is completed. This is performed both in a replenishment scene (hereinafter, also referred to as “supply”).

  At the time of hot water filling, since hot water supply to the hot water tap is not required, the hot water supply capacity is designed so that hot water filling is completed within a certain time. On the other hand, at the time of replenishment, hot water supply to the bathtub and hot water supply to the hot water tap overlap, and there is a possibility that the hot water supply load becomes excessive. If the hot water supply capacity is designed to cope with the hot water supply load at this time, there is a concern that the cost of the bathtub hot water supply system will increase due to an increase in the required number of hot water heaters. This problem is particularly noticeable in large-scale bath facilities for business use or the like.

  The present invention has been made to solve such a problem, and an object of the present invention is to suppress a maximum hot water supply load in a bathtub hot water supply system to which a bathtub replenishing water device having a water level adjusting function is applied. It is an object of the present invention to provide a configuration of a bath tub replenishing water device.

  According to one aspect of the present invention, a bathtub replenishing water device for supplying hot water to a bathtub includes a tapping channel, a flow regulator, and a control device. The hot water path outputs to the bathtub hot water in which heated water from at least one water heater and low-temperature water lower than the heated water are mixed. The flow regulator is configured to control the flow rate of hot water from the hot water supply passage. The control device controls the flow regulator. The control device includes hot water filling means, supply means, and flow rate control means. The hot water filling means supplies hot water from the hot water supply channel to the bathtub until the bathtub water level reaches a predetermined water level according to the start of operation of the bathtub replenishing water device. After the hot water supply by the hot water filling means is completed, the replenishing means supplies the hot water to the bathtub again from the hot water supply channel in accordance with the decrease in the bathtub water level based on the bathtub water level detection signal. The flow rate control means controls the flow rate regulator to set the hot water supply flow rate by the hot water filling means to the first flow rate and to set the hot water supply flow rate by the replenishment means to the second flow rate lower than the first flow rate. I do.

  According to the above bathtub replenishing water device, when the bathtub water level drops during bathing of the user after the completion of hot water filling, hot water can be automatically replenished to the bathtub at a lower flow rate than at the time of hot water filling. Thereby, at the time of the replenishment, the hot water supply load of the water heater can be suppressed even if the water heater supplies hot water to another terminal such as a hot water tap used during bathing by the user. As a result, since the maximum hot water supply load of the water heater can be reduced, it is possible to reduce the cost of the bathtub hot water supply system to which the bathtub replenishing water device is applied by suppressing the hot water supply capacity (or the number of hot water supply units).

  In another aspect of the present invention, the bathtub hot water supply system includes at least one hot water heater, a water level detection sensor provided in the bathtub, and heating water from the water heater and low-temperature water lower than the heating water. And a tub replenishing water device. The water heater is configured to supply the heated water to at least one hot water tap. The bathtub replenishing water device includes a tapping path, a flow regulator, and a control device. The hot water path outputs hot water mixed with heated water and low-temperature water to the bathtub. The flow regulator is configured to control the flow rate of hot water from the hot water supply passage. The control device controls the flow regulator. The control device includes hot water filling means, supply means, and flow rate control means. The hot water filling means supplies hot water from the hot water supply channel to the bathtub until the bathtub water level reaches a predetermined water level according to the start of operation of the bathtub replenishing water device. After the hot water supply by the hot water filling means is completed, the replenishing means supplies the hot water to the bathtub again from the hot water supply channel in accordance with the decrease in the bathtub water level based on the bathtub water level detection signal. The flow rate control means controls the flow rate regulator to set the hot water supply flow rate by the hot water filling means to the first flow rate and to set the hot water supply flow rate by the replenishing means to the second flow rate lower than the first flow rate. I do.

  According to the bathtub hot water supply system, the bathtub replenishing water device can replenish the bathtub with a lower flow rate than at the time of hot water filling when the water level of the bathtub drops during user bathing after the hot water filling. Thus, it is possible to suppress the maximum hot water supply load of the water heater at the time of replenishment in which hot water from the water heater is likely to be used even in the hot water tap. As a result, it is possible to reduce the cost of the bathtub hot water supply system by suppressing the hot water supply capacity (or the number of installed hot water heaters).

  Preferably, the hot water filling means supplies hot water from the hot water supply channel based on the water level detection signal from the start of operation of the bathtub replenishing water device until the bathtub water level reaches a hot water supply stop water level corresponding to a predetermined water level. When the bathtub water level drops to a predetermined replenishment start water level lower than the hot water supply stop water level, the replenishing means supplies hot water again from the tapping channel.

  With this configuration, the hot water supply flow control for suppressing the maximum hot water supply load of the water heater can be appropriately performed by accurately distinguishing between hot water filling and refilling using the detected value of the bathtub water level.

  Alternatively, preferably, the hot water supply by the hot water filling means can be executed when the current time is outside the predetermined time zone, but is not executed when the current time is within the predetermined time zone. Hot water supply by the replenishing means can be executed when the current time is within a predetermined time zone, but is not executed when the current time is outside the predetermined time zone.

  With this configuration, the hot water supply flow control for suppressing the maximum hot water supply load of the water heater can be appropriately executed by easily distinguishing between the hot water filling time and the replenishing time using the current time.

  Preferably, the bathtub hot water supply system further includes a filtration unit for circulating and filtering hot water in the bathtub. When the bathtub water level falls to a predetermined replenishment start water level lower than the predetermined water level based on the water level detection signal, the replenishing means supplies hot water again from the tap water path. The filtration unit is configured to stop operation of the filtration unit when the bathtub water level falls below a predetermined filtration stop water level lower than the replenishment start water level during operation of the filtration unit. The flow rate control means increases the hot water supply flow rate from the second flow rate when the bath tub water level drops to a predetermined reference water level higher than the filtration stop water level and lower than the replenishment start water level when hot water is supplied to the bath tub by the replenishment means. Control the flow regulator.

  With such a configuration, in the bathtub hot water supply system in which the filtration unit is installed, the maximum hot water supply load of the water heater is suppressed, and the filtration unit is prevented from being stopped during operation of the bathtub replenishing water device. The hot water supply flow rate can be controlled.

  According to the present invention, the maximum hot water supply load in a bathtub hot water supply system to which a bathtub replenishing water device having a water level adjusting function is applied can be suppressed.

It is a block diagram which shows the structure of the bathtub replenishing water apparatus according to embodiment of this invention, and the structure of the bathtub hot water supply system to which the said bathtub replenishing water system was applied. FIG. 5 is a conceptual waveform diagram illustrating an operation example of the bathtub replenishing water device according to the present embodiment. It is a state transition diagram at the time of hot water supply operation of the bathtub replenishing water device according to the present embodiment. It is a flowchart explaining control processing of the hot-water supply operation by the bathtub replenishing water device according to the present embodiment. It is a flowchart explaining flow control by the bathtub replenishing water apparatus according to this Embodiment. It is a state transition diagram in the hot-water supply operation | movement of the bathtub replenishing water apparatus according to the modification of this Embodiment. It is a conceptual waveform diagram explaining the operation example of the bathtub replenishing water apparatus according to the modification of this Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, the same or corresponding parts in the drawings have the same reference characters allotted, and description thereof will not be repeated in principle.

  FIG. 1 is a block diagram showing an overall configuration of a bathtub hot water supply system to which a bathtub replenishing water device according to an embodiment of the present invention is applied.

  Referring to FIG. 1, bathtub hot water supply system 5 for bathtub 50 includes at least one water heater 10, filtration unit 60, and bathtub replenishing water device 100.

  Each water heater 10 heats incoming water from water inlet pipe 20 by a heat exchanger (not shown), and supplies heated water (high-temperature water) to high-temperature water pipe 15. In the present embodiment, the heat source of each water heater 10 is not particularly limited, and typically, heating can be performed by the combustion heat of fuel such as gas or oil. Alternatively, a heat pump type water heater can be applied. Each water heater 10 has a function of controlling the temperature of the heating water according to a set temperature (for example, about 60 ° C.). Although FIG. 1 illustrates a configuration in which three water heaters 10 are installed, in the present embodiment, the number of installed water heaters 10 is not limited.

  The high-temperature water pipe 15 transmits heated water to the bathtub replenishing water device 100. Further, low-temperature water having a lower temperature than the heated water from the water heater 10 is input to the bathtub replenishing water device 100. In the configuration example of FIG. 1, low-temperature water common to the water heater 10 is supplied by a pipe 21 branched from a water inlet pipe 20. However, the low-temperature water input to the bathtub replenishing water device 100 is not limited to the example of FIG. 1, and the supply source may be arbitrary. For example, the low-temperature water may be input from a water source different from the water heater 10, and if the temperature is lower than the heating water from the water heater 10, the low-temperature water is preheated by a low-heat source other than the water heater 10 (for example, a waste heat source). May be used.

  The pipe 16 is branched from the high-temperature water pipe 15 and transmits heated water from each water heater 10 to the plurality of hot water taps 30. The pipe 22 is branched from the water inlet pipe 20 and transmits low-temperature water to at least one hot water tap 30. Each hot water tap 30 is connected to a callan and / or a shower (not shown). When the user operates the hot water tap 30, the mixed water of the heated water and the low-temperature water supplied from the water heater 10 is output from the curran and / or the shower. Thus, water heater 10 is configured to supply heated water to hot water tap 30 in addition to bathtub replenishing water device 100.

  The bathtub makeup water supply device 100 includes a water inlet channel 110, a high-temperature water channel 120, flow control valves 130 and 140, a hot water channel 150, and a controller 180. A flow control valve 160, a flow sensor 170, and a temperature sensor 175 are inserted and connected to the hot water path 150. Further, the bathtub refilling water device 100 is configured so that the operation of the bathtub refilling water device 100 can be remotely monitored by a remote monitor 190 connected to the controller 180. The data that can be monitored by the remote monitor 190 can be stored in the management server by sequentially transferring the data to a management server (not shown).

  Low-temperature water is input from the pipe 21 to the water inlet channel 110. Heated water is input to the high-temperature water channel 120 from the high-temperature water pipe 15. The low-temperature water in the water inlet channel 110 and the heated water in the high-temperature water channel 120 are mixed, and the hot water is output from the hot-water outlet channel 150 to the water outlet 52 to the bathtub 50.

  Temperature sensor 175 is formed of, for example, a thermistor, and detects hot water temperature T from bath tub replenishing water device 100. The value detected by the temperature sensor 175 is input to the controller 180.

  At least one of the water inlet channel 110 and the high temperature water channel 120 is provided with a flow control valve for controlling the mixing ratio of the low temperature water and the heating water. FIG. 1 illustrates a configuration in which flow control valves 130 and 140 are provided in water inlet channel 110 and high-temperature water channel 120, respectively, but a configuration in which only one of them is disposed (for example, flow control valve 130 on the water inlet channel side). Only).

  The flow control valves 130 and 140 are configured by, for example, electric servo valves. That is, each of the flow control valves 130 and 140 is configured so that the flow rate can be controlled by controlling the opening degree according to the control signal from the controller 180.

  The controller 180 controls the mixing ratio of the low-temperature water and the heating water based on a comparison between the temperature detected by the temperature sensor 175 and the set temperature. The mixing ratio can be controlled by adjusting the opening of the flow control valves 130 and / or 140 by the controller 180. Thereby, tapping temperature T from bathtub replenishing water device 100 is controlled to, for example, about 40 ° C. in accordance with the set temperature. The low-temperature water is lower than the set temperature.

  The flow rate sensor 170 is configured by, for example, an impeller sensor, and detects a hot water supply flow rate Q from the bathtub replenishing water device 100. The value detected by the flow sensor 170 is input to the controller 180. The flow control valve 160 can be configured by an electric servo valve similarly to the flow control valves 130 and 140. As described above, the flow regulating valve 160 is configured to be able to control the passing flow rate according to the control signal from the controller 180.

  Therefore, controller 180 can control hot water supply flow rate Q to bathtub 50 by controlling the opening of flow control valve 160 in accordance with the detection value of flow rate sensor 170. That is, the flow control valve 160 corresponds to one embodiment of a “flow control device”. The flow control valves 130, 140, and 160 are configured to be controlled to a fully closed state (opening degree = 0) by the controller 180 so that the flow rate can be controlled to zero.

  As described above, for the hot water supplied from the bathtub replenishing water device 100 to the bathtub 50, the temperature control by the flow rate control of the flow rate adjustment valves 130 and 140 and the flow rate control by the flow rate adjustment valve 160 are possible. Each of the flow control valves 130, 140, and 160 may be configured by a servo valve that can control the opening degree, or may be configured by a plurality of on-off valves arranged in parallel. In such a configuration, by controlling the opening / closing of each of the plurality of on-off valves in accordance with a signal from the controller 180, the flow rate can be controlled by the number of valves to be opened.

  The bathtub 50 is provided with a water level sensor 55 for detecting the bathtub water level L. The water level sensor 55 is configured to be able to compare at least the height between the bathtub water level L and a predetermined water level L0 to L4. That is, the water level sensor 55 may be configured to be able to continuously detect the bathtub water level by a pressure sensor or the like, and discretely detects that the bathtub water level reaches the water levels L0 to L4 according to the contact between the electrode and the water surface. It may be configured to be possible. The output signal of the water level sensor 55 is transmitted to the controller 180 via the shield wire 70.

  The filtration unit 60 is connected to the bathtub 50 via a pipe, and is configured to circulate and filter the hot water in the bathtub 50. A remote controller (hereinafter simply referred to as a remote controller) 65 for inputting an operation command of the filtration unit 60 is connected to the controller 180 via a communication line 75. That is, the operation command of the filtration unit 60 input to the remote controller 65 is also detected by the controller 180.

  The water level L0 is a water level corresponding to the full state of the bathtub 50. Hereinafter, the water level L0 is also referred to as a full water level L0. The water level L1 is a water level at which hot water supply is stopped from the bathtub replenishing water device 100, and is basically set to an upper limit water level in the automatic water level control of the bathtub 50. Hereinafter, water level L1 is also referred to as hot water supply stop water level L1.

  The upper limit value of the automatic water level control may be temporarily or constantly set to be equal to the full water level L0 (that is, L1 = L0). In this case, the hot water overflows from the bathtub 50, so that surface dirt and the like can be discharged. That is, the hot water supply stop water level L1 is set to L1 ≦ L0.

  The water level L2 is a water level at which hot water supply from the bathtub replenishing water device 100 is restarted when bathtub water is reduced after the completion of hot water filling described later. Hereinafter, the water level L2 is also referred to as a replenishment start water level. The replenishment start water level L2 is set lower than the hot water supply stop water level L1.

  In the configuration in which the filtration unit 60 is provided, water levels L3 and L4 are further defined in addition to the water levels L0 to L2. The water level L3 is a water level that is a condition for starting the operation of the filtration unit 60. That is, in order to start the filtration unit 60 in the stopped state, the bathtub water level must be higher than L3. Hereinafter, the water level L3 is also referred to as a filtration unit starting water level L3.

  L4 corresponds to a lower limit water level at which the filtration unit 60 can be operated. Therefore, when the water level falls below L4 during operation of the filtration unit 60, the filtration unit 60 is automatically stopped. Hereinafter, the water level L4 is also referred to as a filtration unit stop water level L4. In the configuration in which the filtration unit 60 is provided, the water levels L3 and L4 are set such that L2> L3> L4.

  If the bathtub water level L does not reach the filtration unit activation water level L3 when the operation command of the filtration unit 60 is input to the remote controller 65, the controller 180 executes hot water supply to the bathtub 50. Then, the operation start of the filtration unit 60 is on standby until the bathtub water level L reaches the filtration unit activation water level L3.

  In this manner, the bathtub replenishing water device 100 can detect the bathtub water level L based on the output of the water level sensor 55. The bathtub replenishing water device 100 controls the hot water supply from the bathtub replenishing water device 100 to the bathtub 50 based on the detected bathtub water level as described below.

  FIG. 2 is a conceptual waveform diagram illustrating an operation example of bathtub replenishing water device 100. FIG. 3 is a state transition diagram when the bathtub replenishing water device 100 is operating.

  Referring to FIG. 2, at time t0, a hot water supply operation to bathtub 50 is started with bathtub water level = 0.

  Referring to FIG. 3, hot water supply by bath tub replenishing water device 100 is executed by selecting a hot water filling mode and a replenishing mode. Hereinafter, it is assumed that the hot water filling mode is selected when FLG = 0 and the replenishment mode is selected when FLG = 1, using the flag FLG indicating the operation mode.

  The default value of the flag FLG is “0”. Therefore, when the operation of the bathtub replenishing water device 100 is started, FLG = 0 is initially set. On the other hand, when the predetermined hot water filling end condition is satisfied in the hot water filling mode, FLG is changed from 0 to 1, and the operation mode transits from the hot water filling mode to the supply mode. That is, the flag FLG is set to 0 until the hot water filling is finished, while being set to 1 when the hot water filling is finished.

  Typically, the fact that the detection value of the bathtub water level L by the water level sensor 55 has reached the hot water supply stop water level L1 (water level rise condition) can be used as the hot water filling end condition. Alternatively, even if the bathtub water level L is not directly detected, the flow rate integrated value reaches a predetermined water amount corresponding to the hot water supply stop water level L1 by integrating the flow rate detection value per unit time by the flow rate sensor 170. This (flow rate integration condition) may be used as the hot water filling end condition.

  Referring to FIG. 2 again, from the start of the operation at time t0, hot water supply in the hot water filling mode is started, and the bathtub water level gradually rises. At time t1, when the hot water filling is completed by the bathtub water level L reaching the hot water supply stop water level L1, the hot water supply from the bathtub replenishing water device 100 is temporarily stopped. The hot water supply flow rate per unit time from bathtub replenishing water device 100 in the hot water filling mode is set to Q = Q1. That is, the hot water supply stop water level L1 corresponds to an example of “predetermined water level” in hot water filling.

  In the case where the bathtub hot water supply system 5 is used for business purposes, hot water supply (hot water filling) at times t0 to t1 by a predetermined time T1 determined according to the start time of the business hours or the bathing hours. ) Needs to be terminated.

  After the completion of the hot water filling, the bathtub water level L decreases due to the user's bathing or the like. When the bathtub water level L drops to the replenishment start water level L2 at time t2, hot water supply from the bathtub replenishment water device 100 is restarted according to the flow rate Q2 per unit time in the replenishment mode. The flow rate Q2 in the supply mode is set lower than the flow rate Q1 in the hot water filling mode.

  When the bathtub water level returns to the hot water supply stop water level L1 due to the hot water supply to the bathtub 50 restarted from the time t2, the hot water supply from the bathtub replenishing water device 100 is stopped again (Q = 0).

  From time t2 to t3, the flag FLG needs to be set to 1 in order to apply the flow rate Q2 in the supply mode. For example, the flag FLG can be changed from 0 to 1 at time t1 at which the hot water filling ends based on the establishment of the water level rising condition (L> L1). Alternatively, as a time condition, when the flag FLG is changed from 0 to 1 on condition that the current time is within a predetermined time zone predetermined in correspondence with the business hours or the bathing time zone, the predetermined time before the user bathes. At time T1, the flag FLG can be changed from 0 to 1.

  As described above, as the transition condition from FLG = 0 to FLG = 1 (hot water filling end condition), the water level rising condition based on the bathtub water level L, the flow rate integration condition based on the value detected by the flow rate sensor 170, and the current time It is possible to appropriately use the time condition based on the time condition. As shown by the dotted line in FIG. 3, when the current time is outside the predetermined time zone, that is, at a time later than the end time of the business hours or the bathing hours, the flag FLG is returned from 1 to 0. It is also possible.

  FIG. 4 is a flowchart illustrating a control process of hot water supply operation of bathtub refilling water device 100 according to the present embodiment. The control process shown in FIG. 4 is repeatedly executed by controller 180 during operation of bathtub replenishing water device 100.

  Referring to FIG. 4, controller 180 determines in step S100 whether or not current flag FLG = 0. When FLG = 0 (YES in S100), controller 180 determines in step S110 whether bathtub water level L has reached a predetermined water level (here, hot water supply stop water level L1). The determination in step S110 can be executed in common with the above-described water level rising condition or flow rate integration condition in the hot water filling end condition, or by a combination of both.

  During the period of FLG = 0 (hot water filling mode), controller 180 proceeds to step S200 until bathtub water level L reaches a predetermined water level (hot water supply stop water level L1) (when NO is determined in S110). Then, hot water supply to the bathtub 50 is executed. Thereby, hot water filling to bathtub 50 is performed. On the other hand, when bathtub water level L reaches a predetermined water level (hot water supply stop water level L1) under FLG = 0 (when determination of YES in S110), controller 180 advances the process to step S150 to supply hot water to bathtub 50. Stop. Thereby, the flow control valve 160 in the bathtub replenishing water device 100 is fully closed, and the hot water filling is completed. That is, the function of the "hot water filling means" can be realized by the processes of steps S100 and S110.

  During the period of FLG = 1 (supply mode) (when the determination in S100 is NO), controller 180 proceeds to step S120 to determine whether hot water is being supplied. When the hot water is not being supplied (NO in S120), controller 180 proceeds to step S130 to compare bathtub water level L with replenishment start water level L2.

  If bathtub water level L is lower than replenishment start water level L2 (determination of YES in S130), controller 180 proceeds to step S200 to execute hot water supply. Thereby, replenishment of bathtub water is started. On the other hand, when bathtub water level L is equal to or higher than replenishment start water level L2 (NO in S130), controller 180 advances the process to step S150. That is, the state in which hot water supply to bathtub 50 is stopped is maintained.

  During hot water supply (when YES is determined in S120), controller 180 proceeds to step S140 to compare bathtub water level L with hot water supply stop water level L1. Controller 180 advances the process to step S200 and executes hot water supply until bathtub water level L reaches hot water supply stop water level L1 (NO in S140). That is, replenishment of bathtub water is continued. On the other hand, when bathtub water level L reaches hot water supply stop water level L1 (when YES is determined in S140), controller 180 advances the process to step S150 and stops hot water supply to bathtub 50. Thereby, replenishment of bathtub water is completed. As described above, the function of the “supply unit” can be realized by the processing in steps S120 to S140.

  As described above, the hot water supply stop water level L1 in step S140 can be fixed or temporarily set to the full water level L0 (L1 = L0).

  FIG. 5 is a flowchart illustrating the flow control in step S200 in FIG.

  Referring to FIG. 5, in step S210, controller 180 branches the process to steps S220 and S230 depending on whether or not current flag FLG = 0. When FLG = 0 (when YES is determined in S210), controller 180 controls flow rate adjusting valve 160 in step S220 so that the hot water supply flow rate (Q = Q1) in accordance with the hot water filling mode. For example, in step S220, the flow control valve 160 is controlled to a fully open state. That is, the flow rate Q1 is preferably set to the maximum flow rate by the flow control valve 160. In this way, the time required for hot water filling can be minimized.

  When FLG = 1 (when NO is determined in S210), controller 180 advances the process to step S230, and sets flow rate adjusting valve 160 such that the hot water flow rate (Q = Q2) according to the supply mode is reached. Control.

  Thus, according to the bathtub refill water device according to the embodiment of the present invention, the hot water supply flow rate when bathtub water level L is in the region between hot water supply stop water level L1 and refill start water level L2 (L2 <L <L1). Can be set lower at the time of replenishment than at the time of hot water filling. As can be understood from the flowchart of FIG. 4, during the period of FLG = 0, hot water filling (flow rate Q1) can be executed according to whether or not the water level reaches the predetermined water level (S110), while hot water supply in the replenishment mode is performed. (Flow rate Q2) is not executed. On the other hand, during the period of FLG = 1, replenishment of the bathtub water (flow rate Q2) can be executed according to the bathtub water level L, but hot water supply (flow rate Q1) in the hot water filling mode is not executed.

  Normally, the replenishment of the bathtub water (time t2 to t3 in FIG. 2) is performed during the bathing of the user, so that the hot water supply device 10 supplies hot water to the hot water tap 30 (curan and / or shower). There is a high possibility that the supply to the bathtub 50 is performed simultaneously. At this time, if the hot water supply flow rate at the time of refilling is set to be equal to that at the time of hot water filling (for example, the flow control valve 160 is fully opened), the water level recovery at the time of refilling is accelerated, while the maximum hot water supply load of the water heater 10 is increased. Is likely to increase. If the hot water supply capacity (or the number of installed hot water heaters) of the water heater 10 increases to cope with the maximum hot water supply load, the cost of the entire bathtub hot water supply system 5 may be increased.

  On the other hand, in the bathtub hot water supply system to which the bathtub replenishing water device according to the present embodiment is applied, the flow rate of hot water supplied from bathtub replenishing water device 100 at the time of replenishment is reduced from that at the time of hot water filling, so that maximum Hot water supply load can be suppressed. This makes it possible to reduce the cost by suppressing the hot water supply capacity (or the number of installed hot water heaters) of the water heater 10.

  Further, even if the hot water supply from the bathtub replenishing water device 100 cannot be stopped due to a failure at the time of replenishment, the amount of damage caused by useless hot water supply can be reduced. In addition, since the flow control valve 160 is not opened and closed from the fully opened state to the fully closed state at the time of replenishment, the stress (stress) applied to the packing of the valve can be suppressed, and the durability of parts can be improved. is there.

(Modification)
In the configuration shown in FIG. 1 where the filtration unit 60 is installed, the operation of the filtration unit 60 is also controlled according to the bathtub water level L. Therefore, in the bath tub replenishing water device according to the modification of the embodiment, the hot water supply flow rate is controlled in further consideration of the water level related to the operation of filtration unit 60. Conversely, the control shown in FIGS. 2 to 5 is applicable to a configuration in which the filtration unit 60 is not provided.

  FIG. 6 is a state transition diagram in a hot water supply operation of the bathtub refill water device according to the modification of the present embodiment.

  6 is compared with FIG. 3, in the bathtub refill water device according to the modification of the embodiment, a transition condition from refill mode (FLG = 1) to hot water filling mode (FLG = 0) is further determined. Specifically, when the bathtub water level L falls below the reference water level Ln in the replenishment mode, the flag FLG is returned from 1 to 0, and the operation mode shifts from the replenishment mode to the hot water filling mode. The reference water level Ln is set higher than the filtration unit stop water level L4 and lower than the replenishment start water level L2. For example, the reference water level Ln can be the filtration unit starting water level L3. When the water level sensor 55 can continuously detect the bathtub water level L, the reference water level Ln can be set freely within the range of L4 <L <L2.

  Further, similarly to FIG. 3, when the current time is outside the predetermined time zone, that is, at a time later than the end time of the business hours or the bathing time zone, the flag FLG can be returned from 1 to 0. It is. On the other hand, the transition condition from hot water filling mode (FLG = 0) to replenishment mode (FLG = 1) is the same as in FIG. 3, and therefore detailed description will not be repeated.

  FIG. 7 is a graph illustrating an example of the water level of the bathtub water level by the hot water supply operation of the bathtub replenishing water device according to the modification of the present embodiment.

  Referring to FIG. 7, the operation of bath tub replenishing device 100 until time t2 is the same as that in FIG. 2, and thus detailed description will not be repeated.

  On the other hand, even if hot water supply (supplement) to the bathtub 50 is started at time t2 with the flow rate Q2, if the bathtub water level L further decreases, at time t4, the bathtub water level L decreases to the reference water level Ln, as shown in FIG. Thus, the flag FLG is returned from 1 to 0. Thereby, hot water supply flow rate Q is increased from Q2 to Q1.

  As a result, it is possible to prevent the operation of the filtration unit 60 from being stopped because the bathtub water level L decreases to the filtration unit stop water level L4 due to the recovery of the bathtub water level L after the time t4. Thereafter, when the bathtub water level L returns to the hot water supply stop water level L1 (time t5), the hot water supply from the bathtub replenishing water device 100 is stopped again (Q = 0).

  As described above, according to the bath tub replenishing water device according to the modification of the embodiment, in the configuration in which filtration unit 60 is disposed, it is possible to prevent the bath tub water level from dropping to filtration unit stop water level L4 during replenishment with a reduced flow rate. it can. Thus, it is possible to prevent the filtration unit 60 from stopping during the operation of the bathtub replenishing water device.

  6 and 7, an example has been described in which the hot water supply flow rate when the bathtub water level L drops to the reference water level Ln is set to the flow rate Q1 (Q1> Q2) by returning to the hot water filling mode. The flow rate can be set to an arbitrary value within a range larger than the flow rate Q2 (Q> Q2).

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

  5 Bathtub hot water supply system, 10 water heater, 15 high temperature water pipe, 16,21,22 pipe, 20 water inlet pipe, 30 hot water tap, 50 bathtub, 52 water outlet, 55 water level sensor, 60 filtration unit, 65 remote control, 70 shielded wire , 75 communication lines, 100 bath tub replenisher, 110 inlet, 120 high temperature, 130, 140, 160 flow control valve, 150 outlet, 170 flow sensor, 175 temperature sensor, 180 controller, 190 remote monitor, FLG flag ( Hot water filling mode / supply mode), L bathtub water level, L0 full water level, L1 hot water supply stop water level, L2 replenishment start water level, L3 filtration unit start water level, L4 filtration unit stop water level, Ln reference water level, Q hot water supply flow rate, Q1 flow rate (hot water Tension mode), Q2 flow rate (supply mode), T1 predetermined time.

Claims (7)

A bathtub replenishing water device for supplying hot water to the bathtub,
A tapping path for outputting to the bathtub the hot water in which heated water from at least one water heater and low-temperature water lower than the heated water are mixed,
A flow controller provided in the hot water path, for controlling a hot water supply flow rate to the bathtub by the hot water path;
And a control device for controlling the flow regulator,
The water heater is configured to supply the heated water to at least one hot water tap in addition to the bathtub replenishing water device,
The control device includes:
Hot water filling means for supplying hot water to the bath tub from the tapping channel until the bath tub water level reaches a predetermined water level in accordance with the start of operation of the bath tub replenishing water device,
After completion of hot water supply by the hot water filling means, a replenishing means for supplying hot water again from the tapping path to the bathtub in accordance with a decrease in the bathtub water level based on the water level detection signal of the bathtub,
While setting the hot water supply flow rate by the hot water filling means to a first flow rate, the hot water supply flow rate by the supply means is set to a second flow rate different from the first flow rate by the hot water filling means , look including a flow control means for controlling the flow rate regulator,
The bathtub refill water device , wherein the second flow rate is lower than the first flow rate . The hot water filling means, based on the water level detection signal, supplies hot water from the hot water supply channel until the bath tub water level reaches a hot water supply stop water level corresponding to the predetermined water level from the start of operation of the bath tub replenishing water device,
2. The bathtub replenishing water device according to claim 1, wherein the replenishing means replenishes the hot water from the hot water supply channel when the bathtub water level falls to a predetermined replenishment start water level lower than the hot water supply stop water level. 3. Hot water supply by the hot water filling means can be executed when the current time is outside the predetermined time zone, but is not executed when the current time is within the predetermined time zone,
The hot water supply by the replenishing means can be executed when the current time is within the predetermined time zone, but is not executed when the current time is outside the predetermined time zone. Bath tub replenisher. At least one water heater,
A water level detection sensor provided in the bathtub,
Heating water from the water heater, and a low temperature water lower than the heating water is provided with a bath tub replenishing water device,
The water heater is configured to supply the heated water to at least one hot water tap in addition to the bathtub replenishing water device,
The bathtub replenishing water device,
A tapping path for outputting hot water in which the heating water and the low-temperature water are mixed to the bathtub,
A flow regulator provided in the tapping path, for controlling a hot water supply flow rate from the tapping path;
And a control device for controlling the flow regulator,
The control device includes:
Hot water filling means for supplying hot water to the bath tub from the tapping channel until the bath tub water level reaches a predetermined water level in accordance with the start of operation of the bath tub replenishing water device,
After completion of hot water supply by the hot water filling means, a replenishing means for supplying hot water again from the tapping path to the bathtub in accordance with a decrease in the bathtub water level based on the water level detection signal of the bathtub,
While setting the hot water supply flow rate by the hot water filling means to a first flow rate, the hot water supply flow rate by the supply means is set to a second flow rate different from the first flow rate by the hot water filling means , look including a flow control means for controlling the flow rate regulator,
The bathtub hot water supply system , wherein the second flow rate is lower than the first flow rate . The hot water filling means, based on the water level detection signal, supplies hot water from the hot water supply channel until the bath tub water level reaches a hot water supply stop water level corresponding to the predetermined water level from the start of operation of the bath tub replenishing water device,
5. The bathtub hot water supply system according to claim 4, wherein when the bathtub water level falls to a predetermined replenishment start water level lower than the hot water supply stop water level, hot water is supplied again from the hot water supply path. 6. Hot water supply by the hot water filling means can be executed when the current time is outside the predetermined time zone, but is not executed when the current time is within the predetermined time zone,
The hot water supply by the replenishing means can be executed when the current time is within the predetermined time zone, but is not executed when the current time is outside the predetermined time zone. Bathtub hot water system. A bathtub hot water system,
At least one water heater,
A water level detection sensor provided in the bathtub,
Heating water from the water heater, and a low temperature water lower than the heating water is provided with a bath tub replenishing water device,
The water heater is configured to supply the heated water to at least one hot water tap in addition to the bathtub replenishing water device,
The bathtub replenishing water device,
A tapping path for outputting hot water in which the heating water and the low-temperature water are mixed to the bathtub,
A flow regulator provided in the tapping path, for controlling a hot water supply flow rate from the tapping path;
And a control device for controlling the flow regulator,
The control device includes:
Hot water filling means for supplying hot water to the bath tub from the hot water outlet until the bath tub water level reaches a predetermined water level according to the start of operation of the bath tub replenishing water device,
After completion of hot water supply by the hot water filling means, a replenishing means for supplying hot water from the hot water supply path to the bath tub again according to a decrease in the bath tub water level based on a water level detection signal of the bath tub,
The flow rate regulator is set so that the hot water supply flow rate by the hot water filling means is set to a first flow rate while the hot water supply flow rate by the replenishment means is set to a second flow rate lower than the first flow rate. Flow control means for controlling,
The bathtub hot water supply system,
Further comprising a filtration unit for circulating and filtering the hot water in the bathtub,
The replenishing means, based on the water level detection signal, when the bathtub water level drops to a predetermined replenishment start water level lower than the predetermined water level, replenishes hot water from the tapping path,
The filtration unit is configured to stop the operation of the filtration unit when the bathtub water level falls below a predetermined filtration stop water level lower than the replenishment start water level during operation of the filtration unit,
The flow rate control means, based on the water level detection signal, when the bathtub water level drops to a predetermined reference water level higher than the filtration stop water level and lower than the replenishment start water level during hot water supply to the bathtub by the replenishment means. the controls the flow regulator to increase than the hot water flow rate the second flow rate, bath tub hot water system.

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