JP6162502B2 - Bath water equipment - Google Patents

Description

  The present invention relates to a bathtub water utilization device that reuses water remaining in a bathtub.

  There is a household water reuse device that pumps the remaining hot water from a bathtub into a tank provided in a ceiling portion of a bathroom and uses it for washing water in a toilet (see Patent Document 1). In this household water reuse apparatus, an auxiliary tank is provided below the bathtub, the water in the bathtub is drawn into the auxiliary tank, and the water accumulated in the auxiliary tank is pumped to a tank provided in the bathroom ceiling.

Japanese Patent Laid-Open No. 10-60961

  When the remaining hot water after a person takes a bath is transferred to a tank provided in the ceiling of the bathroom and stored for reuse, the tank will become dirty due to the propagation of germs, etc., while being used for a long time.

  The present invention is intended to solve the above-described problem, and provides a bath water utilization device that can sterilize and maintain clean inside a tank that stores hot water pumped up from a bathtub for reuse. It is aimed.

  The gist of the present invention for achieving the object lies in the inventions of the following items.

[1] a pump for pumping up water in the bathtub;
A tank for storing water pumped up by the pump;
A drainage section for draining hot water in the tank to a predetermined outlet according to a request for reuse of hot water in the tank;
A heat source device that raises the water temperature in the tank to a predetermined sterilizable temperature or higher;
A temperature sensor for detecting the water temperature in the tank;
A water amount sensor for detecting the amount of water in the tank;
I have a,
The heat source unit is configured to transfer the water being transferred from the bathtub to the tank by the pump, when the tank is full at the latest from the detected water amount of the water sensor and the detected temperature of the temperature sensor. A bath water utilization device, wherein the temperature of the water is raised so that the water temperature reaches the sterilizable temperature .

  In the said invention, the bathtub water utilization apparatus pumps the hot water in a bathtub to a tank with a pump, and drains the hot water stored in this tank to a predetermined outlet according to a reuse request | requirement. Further, the temperature of the water in the tank is raised to a predetermined sterilizable temperature or higher by a heat source device to sterilize the tank. The method of raising the water temperature in the tank above the sterilizable temperature may be achieved by supplying hot water to the tank so that the water temperature in the tank rises above the sterilizable temperature. The hot water stored may be heated to raise the temperature.

  In the said invention, when water in a bathtub is pumped up and transferred from a bathtub to a tank, the water in the transfer is heated with a heat source machine, and it heats up. The tank is replenished with hot water obtained by raising the temperature with a heat source machine.

  In the above invention, the heat source device controls the temperature rise of the water being transferred so that the water temperature in the tank reaches a sterilizable temperature when the tank is full at the latest. For example, the amount of heat in the tank at the start of replenishment is recognized from the temperature sensor that detects the water temperature in the tank and the water amount sensor that detects the amount of water in the tank. Calculate the required amount of heat from the difference between the amount of heat in the tank and calculate how many hot water should be supplied to the tank from this required amount of heat and the amount of water that can be supplied before the tank is full. The temperature of the bath water being transferred to a certain temperature is raised and replenished to the tank.

[ 2 ] A pump for pumping up water in the bathtub;
A tank for storing water pumped up by the pump;
A drainage section for draining hot water in the tank to a predetermined outlet according to a request for reuse of hot water in the tank;
A heat source device that raises the water temperature in the tank to a predetermined sterilizable temperature or higher;
A temperature sensor for detecting the water temperature in the tank ;
With
The heat source device raises the temperature of water being transferred from the bathtub to the tank by the pump, and before the detected temperature of the temperature sensor reaches the sterilizable temperature, the water being transferred is more than the sterilizable temperature. the temperature was raised to a high temperature, after said temperature detected by the temperature sensor reaches the sterilizable temperature, the water in the transfer you characterized in that heating to the sterilizable temperature bath tub water utilizing apparatus.

  In the above invention, when hot water is supplied to the tank, initially hot water that has been heated to a temperature higher than the sterilizable temperature is supplied, and after the water temperature in the tank reaches the sterilizable temperature, the temperature is increased to the sterilizable temperature. Top up with hot water. For example, when the sterilizable temperature is 60 ° C., hot water of 80 ° C. is initially supplied, and when the water temperature in the tank reaches 60 ° C., hot water of 60 ° C. is supplied to the tank thereafter.

[ 3 ] The heat source device is characterized in that, before the temperature detected by the temperature sensor reaches the sterilizable temperature, the temperature of the water being transferred is increased to a maximum temperature that can be increased by the heat source device. 2 ] The bathtub water utilization apparatus of description.

  In the above invention, before the water temperature in the tank reaches the sterilizable temperature, the hot water heated to the maximum temperature that can be raised by the heat source machine is supplied to the tank before the water temperature in the tank reaches the sterilizable temperature. In addition, the number of cases where the tank becomes full can be reduced.

[ 4 ] The heat source machine has a hot water supply function,
The bathtub according to any one of [ 1 ] to [ 3 ], wherein when the water in the bathtub becomes insufficient during the transfer, hot water obtained by the hot water supply function is supplied to the tank. Water utilization device.

  In the above invention, even when the bath water is insufficient, the tank can be replenished with hot water to raise the temperature above the sterilizable temperature.

[ 5 ] As the pump, a circulation pump of a reheating circuit provided in a bath water heater that performs hot water filling and reheating to the bathtub is used,
The hot water in the bathtub is transferred to the tank through a pipe branched from the reheating circuit,
The bath water heater according to any one of [ 1 ] to [ 4 ], wherein the bath water heater is used as the heat source device.

  In the above-described invention, the bath water is transferred from the bathtub to the tank and heated by using the reheating function of the bath water heater that fills and refills the bathtub.

[ 6 ] The bathtub water use device according to any one of [1] to [ 5 ], wherein the drainage unit drains the water in the tank as flush water for a toilet toilet.

[ 7 ] The bathtub water use device according to [ 6 ], wherein the tank is installed behind the ceiling of the toilet.

  According to the bathtub water utilization apparatus which concerns on this invention, the inside of the tank which stores the hot water pumped up from the bathtub can be sterilized, and it can maintain cleanly.

It is a figure which shows the structure and installation state of the bathtub water utilization apparatus which concern on the 1st Embodiment of this invention. It is a figure which shows arrangement | positioning of the tank water level sensor in a tank. It is a front view which shows an example of a remote control. It is a flowchart which shows the outline | summary of the process of the automatic operation of the bath which a bath water heater performs. It is a flowchart which shows the outline | summary of the whole process which a bathtub water utilization apparatus performs. 6 is a flowchart showing details of a pipe cleaning process (step S204 in FIG. 5). It is a flowchart which shows the detail of a tank replenishment process (step S208 of FIG. 5). It is a flowchart which shows the detail of a toilet heating process (step S209 of FIG. 5). It is a flowchart which shows the detail of a waste_water | drain process (step S210 of FIG. 5). It is a figure which shows the structure and installation state of the bathtub water utilization apparatus which concern on 2nd Embodiment. It is a flowchart which shows the toilet heating process which the bathtub water utilization apparatus which concerns on 2nd Embodiment performs. It is a flowchart which shows the detail of the sterilization process which the bathtub water utilization apparatus which concerns on 2nd Embodiment performs. It is a figure which shows the structural example at the time of making the bath water heater shown in 1st Embodiment have the heating function which the bath water heater of 2nd Embodiment has. It is a figure which shows the example which provided the water intake in the bottom part of the bathtub. It is a figure which shows the example which installed the pump upwards, such as a ceiling back.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings.

  FIG. 1: has shown the structure and installation state of the bathtub water utilization apparatus 10 which concern on the 1st Embodiment of this invention. The bathtub water use device 10 pumps hot water in the bathtub 2 (hereinafter also referred to as bathtub water) into a tank 12 behind the ceiling by a pump 11 and stores the water in the toilet 12 in the toilet toilet 3. It has a function that can be used. In addition, the tank 12 has a function of raising the temperature of the water in the tank 12 to a predetermined sterilizable temperature or higher with a heat source machine.

  The bathtub water utilization apparatus 10 includes a tank 12 installed at a high place such as a ceiling of a toilet, a pump 11 that pumps bathtub water from the bathtub 2 to the tank 12, a bathtub water level sensor 13 that detects a water level in the bathtub 2, and A tank water level sensor 14 for detecting the water level in the tank 12, a temperature sensor 15 for detecting the temperature of hot water in the tank 12, and a drainage part 16 for draining the hot water in the tank 12 as wash water for the toilet 3. The heat radiation part 17 for heating the toilet with the hot water in the tank 12, the control board 18 for controlling the operation of the bathtub water utilization device 10, and the water temperature in the tank are raised to a predetermined sterilizable temperature or higher. It is configured with a heat source machine. Here, a bath water heater 60 that fills and refills the bathtub 2 is used as a heat source machine. As for the pump 11 and the bathtub water level sensor 13, those provided in the bath water heater 60 are used.

  A remote controller 40 (hereinafter referred to as a remote controller 40) of the bathtub water utilization apparatus 10 is provided in the toilet room. The remote controller 40 fulfills a function of receiving an instruction to flow wash water from the tank 12 to the toilet bowl 3 (referred to as a middle water drainage instruction) from the user.

  The capacity of the tank 12 is, for example, about 60 liters. When the amount of wash water in the toilet bowl 3 is 15 liters, the amount of water that can be washed four times can be stored in the tank 12. If the water-saving toilet 3 is used, cleaning can be performed more times. Note that when the water-saving toilet bowl 3 is used, the capacity of the tank 12 may be reduced. The tank 12 has a heat retaining structure. Since the toilet 3 is washed using the hot water in the tank 12, it is possible to obtain a higher detergency than in the case of washing with cold water.

  The bath water heater 60 includes a heat exchanger 61 for reheating the bath, a burner 62 for heating the heat exchanger 61, a bath return connecting the entrance side of the heat exchanger 61 and the water intake 2a of the bathtub 2. The pipe 63, the bath outlet pipe 64 connecting the outlet side of the heat exchanger 61 and the water intake port 2a, the pump 11 inserted in the middle of the bath return pipe 63, and the bathtub water level sensor for detecting the water level in the bathtub 2 (Pressure sensor) 13. A circulation path (reflecting circuit) is formed from the bathtub 2 through the bath return pipe 63, the heat exchanger 61, and the bath outlet pipe 64 to return to the bathtub 2, and the pump 11 circulates the bathtub water through the reheating circuit. Fulfills the function.

  A three-way valve 67 is inserted in the middle of the bath outlet pipe 64, and the intermediate water supply pipe 21 branches from the bath outlet pipe 64 through the three-way valve 67. The intermediate water supply pipe 21 communicates with the tank 12. The three-way valve 67 is in a state in which the outlet side of the heat exchanger 61 and the water intake port 2a are in communication (referred to as a bathtub side), and in a state in which the outlet side of the heat exchanger 61 and the middle water supply pipe 21 are in communication ( Switch to tank side).

  In the middle water supply pipe 21, an electromagnetic valve (referred to as a middle water electromagnetic valve 22) that switches the middle water supply pipe 21 between an open state and a closed state is provided in the vicinity of the tank 12.

  When bath water in the bathtub 2 is pumped up and supplied to the tank 12, the bathtub water utilization device 10 opens the middle water electromagnetic valve 22, switches the three-way valve 67 to the tank side, and retreats the bath water heater 60. Let it be done. That is, the pump 11 is operated and the burner 62 is burned (chasing combustion), whereby the bath water is heated and heated to replenish the tank 12. Here, the tank 12 is sterilized by heating the bath water to a high temperature and replenishing the tank 12.

  In addition, the bath water heater 60 has a hot water supply function, and has a function of supplying hot water to an external faucet, bathtub 2 and tank 12 through a pipe.

  In the upper part of the tank 12, a terminal end of a water supply pipe 23 to which clean water is supplied from a predetermined water supply source is opened. In the middle of the water supply pipe 23, an electromagnetic valve (water supply electromagnetic valve 24) for switching the water supply pipe 23 between an open state and a closed state is provided. When the bath water is insufficient, the water is supplied to the tank 12 from the water supply pipe 23.

  The outlet of the water supply pipe 23 is set to be higher than the maximum water level of the tank 12 by a certain level (for example, 10 cm or more), and the outlet of the water supply pipe 23 and the water in the tank 12 have a height difference ( It is delimited by (space). The intermediate water supply pipe 21 is opened at a position lower than a certain level by the maximum water level of the tank 12. For example, the end of the intermediate water supply pipe 21 is opened to a water level intermediate between the highest water level and the lowest water level. By opening the outlet of the intermediate water supply pipe 21 at a position lower than the maximum water level of the tank 12 by a certain amount or more, the water in the tank 12 easily flows back to the intermediate water supply pipe 21 in the pipe cleaning described later.

  A drain port is provided at the bottom of the tank 12. A drainage pipe 26 connected to the flush water inlet of the toilet 3 is connected to the drainage port. A drainage part 16 for draining hot water in the tank 12 as cleaning water for the toilet bowl 3 is provided in the middle of the drainage pipe 26. The drainage unit 16 includes a flow sensor 27 for detecting the amount of water flowing through the drainage pipe 26, a drainage electromagnetic valve 28 inserted in series in the drainage pipe 26 in series with the flow sensor 27, and a drainage solenoid valve 28 in parallel. A manual flush valve 29 is provided.

  The drain electromagnetic valve 28 switches the drain pipe 26 between an open state and a closed state. When the bathtub water utilization apparatus 10 receives a middle water drainage instruction from the middle water drainage button 44 (see FIG. 3) of the remote controller 40, the bathtub water utilization device 10 opens the drainage electromagnetic valve 28 and supplies the water in the tank 12 to the toilet 3 as washing water. Drain. At this time, the amount of drainage is detected by the flow sensor 27, and control is performed to close the drainage electromagnetic valve 28 when a predetermined amount of water is reached. The amount of drainage for one middle water drainage instruction can be set in advance using the remote controller 40 or the like.

  The manual flush valve 29 is a valve that receives a manual operation from a user and switches the drainage pipe 26 between an open state and a closed state, and automatically flows a predetermined amount of water after a single drainage operation. Has a close function.

  The heat dissipating unit 17 that heats the toilet with the heat of hot water in the tank 12 includes a heat exchanger 31 that dissipates heat in the tank 12 and a fan 32. The heat exchanger 31 includes a water tube for heat exchange and a plurality of fins provided on the outer peripheral surface of the water tube. Both ends of the water pipe are open to the tank 12.

  On the ceiling of the toilet, a vent 33 is provided at a position corresponding to the installation location of the heat exchanger 31. The air flow generated by the fan 32 passes through the heat exchanger 31 and is sent from the vent 33 to the toilet room. A heat pipe may be used as the heat exchanger 31. Hot water in the tank 12 flows through the heat exchanger 31 by natural convection. In addition, since the heat insulation performance is high in recent houses and the toilet is narrow, the heating capacity of the heat radiating unit 17 may be small.

  A human sensor 35 that detects that a person is in the toilet is provided in the toilet (for example, the ceiling). In addition, the toilet is provided with a ventilation fan 37 for ventilating the inside of the toilet by discharging air to the outdoors. When the radiating unit 17 heats the toilet, if the presence sensor 35 detects that a person is in the toilet, the fan 32 of the radiating unit 17 is stopped and the toilet ventilation fan 37 is operated. The control of stopping the fan 37 and operating the fan 32 of the heat radiating unit 17 is performed. By stopping the ventilation fan 37, the toilet can be effectively heated by the heat of the hot water in the tank 12.

  In addition, a deodorizing device 56 is attached to the tank 12. The deodorizing device 56 deodorizes the odor emitted from the bathtub water stored in the tank 12. The deodorizer 56 may be of a type that masks odors or a type that decomposes odors.

  Further, a ventilation duct 51 for exhausting the air in the tank 12 to the outdoors is provided as a measure against odor. One end of the ventilation duct 51 is open to the upper lid of the tank 12, and the other end is open to the outdoors. A ventilation fan 52 is attached to the other end of the ventilation duct 51.

  The tank 12 is connected to an outdoor drain pipe 54 for making the water in the tank 12 available for watering and car washing outdoors. One end of the outdoor drain pipe 54 opens to the lower part in the tank 12, and an outdoor outlet tap 55 is attached to the other end. Since the tank 12 is provided at a high place, the water discharge pressure can be secured with a difference in elevation.

  The bathtub water level sensor 13 and the tank water level sensor 14 may be selected from various sensors such as a pressure (water pressure) sensor, a water flow switch, a float switch, and an electrode rod. A pressure sensor is suitable for the bathtub water level sensor 13.

  The control board 18 is configured by a circuit having a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory) as main parts, and the CPU executes a program stored in the ROM so that the bathtub is executed. The water utilization apparatus 10 is controlled. A tank water level sensor 14, a temperature sensor 15, a flow sensor 27, a human sensor 35, and the like are connected to the control board 18, and detection signals output from these are input. The control board 18 is connected to the control signal lines of the middle water solenoid valve 22, the water solenoid valve 24, the drain solenoid valve 28, the fan 32 of the heat radiating unit 17, the ventilation fan 37, and the ventilation fan 52, and controls the on / off of each. To do. In addition, the control board 18 communicates with the bath water heater 60 to control the operation of the bath water heater 60 and acquires information indicating various sensors and operation states of the bath water heater 60. For example, information indicating the bathtub water level detected by the bathtub water level sensor 13 of the bath water heater 60 is obtained. Further, a remote controller 40 is connected to the control board 18.

  The bathtub water utilization apparatus 10 operates by receiving power supply from a commercial power supply at all times. In preparation for a power failure, the pump 11 may be operable with a battery such as a dry cell, or may be manually operable.

  FIG. 2 shows the arrangement of the tank water level sensor 14 in the tank 12. The tank water level sensor 14 is provided at a location where water discharged from the outlet of the water supply pipe 23 hits the tank 12. In the example of FIG. 2, the tank water level sensor 14 detects whether or not there is water at the lowest water level of the tank 12 and the first electrode 14 a that detects whether or not the water has reached the highest water level of the tank 12. A second electrode 14b is provided. Both the first electrode 14a and the second electrode 14b (particularly the tip) are provided at locations where the water discharged from the outlet of the water supply pipe 23 into the tank 12 hits (preferably directly hits).

  Even when a pressure sensor or the like is used as the tank water level sensor 14, the pressure sensor is disposed at a place where water discharged from the outlet of the water supply pipe 23 hits the tank 12, as described above.

  Since the bathtub water is dirty compared to the tap water, the tank water level sensor 14 is contaminated by pumping the bathtub water into the tank 12 and storing it. However, the tank water level sensor 14 is provided when the tank 12 is replenished with the water by disposing the tank water level sensor 14 at a location where water (water) discharged from the outlet of the water supply pipe 23 hits the tank 12. Is washed. Thereby, the performance fall of the tank water level sensor 14 by dirt is prevented.

  In the example of FIG. 2, the bath water discharged from the intermediate water supply pipe 21 into the tank 12 hits the tip of the second electrode 14 b of the tank water level sensor 14, so the bath water is supplied to the tank 12. In some cases, the second electrode 14b is washed.

  FIG. 3 shows an example of the remote controller 40. The remote controller 40 includes a display unit 41 and various operation buttons. The operation buttons include an operation button 42, a setting button 43, a middle water drain button 44, a water drain button 45, a pipe cleaning button 46, an up / down key 47 for increasing / decreasing a set value, a toilet heating button 49, and the like. In addition, in the vicinity of each of the middle water drain button 44, the water drain button 45, and the pipe washing button 46 on the right upper side, a lamp 48 that is turned on while the corresponding button is turned on and the operation related to the function is being executed. Is provided.

  The operation button 42 is an operation button for turning on / off the operation of the bathtub water utilization apparatus 10. The setting button 43 is an operation button for entering a setting mode for setting various operating conditions. For example, the amount of washing water drained from the tank 12, the heating setting temperature of the toilet, the pipe washing time interval (set operation time), and the like are set for one middle water drainage instruction.

  The middle water drain button 44 is an operation button for receiving an instruction from the user to flow cleaning water from the tank 12 to the toilet bowl 3. The clean water drain button 45 is an operation button for instructing to use clean water for cleaning the toilet bowl 3. When the water drain button 45 is turned on, the operation of pumping the bathtub water into the tank 12 is not performed, and when the water in the tank 12 is reduced, the water is supplied to the tank 12 from the water supply pipe 23. Become so.

  The pipe cleaning button 46 is an operation button for receiving a cleaning instruction for the middle water supply pipe 21 from the user. Even when the automatic cleaning of the pipe is not performed for a long period of time, the pipe can be cleaned by operating the pipe cleaning button 46.

  The toilet heating button 49 is a switch for switching whether or not the toilet is heated by the heat of hot water in the tank 12.

  The display unit 41 of the remote controller 40 displays the number of times hot water (stored in the water) stored in the tank 12 has been drained into the toilet bowl 3, the amount of remaining water in the tank 12, various warnings, operation guidance, and the like.

  Next, operation | movement of the bathtub water utilization apparatus 10 is demonstrated.

  The bath water utilization device 10 receives information indicating the end of automatic bath operation from the bath water heater 60 that fills and heats the bath 2 and keeps the bath (heated). Recognize that hot water is available on the bathtub water utilization device 10 side. First, automatic bath operation performed by the bath water heater 60 will be briefly described.

  FIG. 4 shows an outline of the automatic bath processing performed by the bath water heater 60. In the normal state including the automatic operation of the bath, the three-way valve 67 is set to a state (tub side) where the outlet side of the heat exchanger 61 and the water intake port 2a are communicated.

  When the automatic operation is turned on, the bath water heater 60 resets the hot water filling end flag (OFF) (step S101). The hot water filling end flag indicates that automatic bath operation has been completed when ON, that is, bathing into the bathtub 2 has been completed, and the remaining hot water in the bathtub 2 can be used by the bathtub water utilization device 10. . When the hot water filling end flag is OFF, the bathtub water in the bathtub 2 is drawn up by the bathtub water utilization device 10 and cannot be used.

  Next, the bath water heater 60 starts a 4-hour heat retention timer (step S102). The bath water heater 60 has a function of automatically ending the automatic operation of the bath when a predetermined time (here, 4 hours) has elapsed since the start of the operation, and the 4-hour heat retention timer is a timer for that purpose.

  Next, the bath water heater 60 fills the bathtub 2 up to the set water level and replenishes it until the hot water in the bathtub 2 reaches the set temperature (step S103). Thereafter, pouring and reheating are appropriately performed so that the water level and temperature of the hot water in the bathtub 2 are maintained at the set water level and the set temperature (Step S104; No, Step S105; No).

  When the bath water heater 60 detects that the water level in the bathtub 2 has suddenly decreased (the bathtub is unplugged) during the automatic operation of the bath (Step S104; Yes), or starts the automatic operation of the bath. When the predetermined time has elapsed (the 4-hour heat retention timer has expired) (step S105; Yes), the hot water filling end flag is turned on (step S106), and the automatic bath operation is terminated. Even when the automatic operation is turned OFF by manual operation, the hot water end flag is turned ON to end the automatic operation of the bath.

  FIG. 5 shows an overview of the entire process performed by the bathtub water utilization apparatus 10. The bathtub water utilization device 10 has a function of pumping the remaining hot water in the bathtub 2 into the tank 12, a function of supplying fresh water to the tank 12 when the hot water in the bathtub 2 cannot be used, and the toilet water in the tank 12 3, a function of draining as wash water, a function of cleaning the middle water supply pipe 21 with clean water, a function of heating the toilet with the heat of hot water in the tank 12, and a function of sterilizing the inside of the tank 12.

  The bathtub water utilization apparatus 10 repeatedly performs the process shown in FIG. 5 continuously while the power is on. First, it is checked whether or not the operation button 42 of the remote controller 40 is turned on (step S201). While the operation button 42 is OFF (step S201; No), the tank 12 is kept at the highest water level. Water is supplied to the tank 12 (step S202).

  Specifically, it is checked whether or not the detected water level of the tank water level sensor 14 is the highest water level of the tank 12, and if it is not the highest water level, the water solenoid valve 24 is opened. Is repeated while the operation button 42 is OFF. Even when the operation button 42 is in the OFF state, the toilet bowl 3 can be washed by draining from the tank 12 by operating the manual flush valve 29.

  If the operation button 42 of the remote controller 40 is ON (step S201; Yes), it is checked whether the pipe cleaning flag is ON (step S203). If the pipe cleaning flag is ON (step S203; Yes), pipe cleaning processing is performed (step S204), and the process proceeds to step S209.

  If the pipe cleaning flag is OFF (step S203; No), it is checked whether or not the water level in the tank 12 detected by the tank water level sensor 14 is the highest water level (step S205). If it is the highest water level (step S205; Yes), that effect is displayed on the display unit 41 of the remote controller 40 (step S206). For example, “tank full” is displayed. Then, the middle water drainage counter is reset to 0 (step S207), and the process proceeds to step S209. The middle water drainage counter is a counter that indicates the number of times that the toilet bowl 3 has been washed in accordance with the operation of the middle water drainage button 44 of the remote controller 40 after the tank 12 is replenished with bathtub water or clean water to bring the tank 12 to the highest water level. .

  If the water level in the tank 12 detected by the tank water level sensor 14 is not the highest water level (step S205; No), a tank replenishment process for replenishing the tank 12 with bathtub water or clean water is executed (step S208), and the process proceeds to step S209. Transition. When the bath water is replenished to the tank 12 in the tank replenishment process, the bath water is heated by the bath water heater 60 and sent to the tank 12 so that the water temperature in the tank 12 rises to a temperature that can be sterilized or higher. ing.

  In step S209, a toilet heating process for heating the toilet with the heat of hot water in the tank 12 is performed.

  Next, in response to pressing of the middle water drain button 44 of the remote controller 40, a drain process is performed to drain hot water in the tank 12 into the toilet 3 as washing water (step S210).

  Next, it is checked whether or not the water drain button 45 is ON (step S211). If the water drain button 45 is ON (step S211; Yes), the water drain flag is set to ON (step S212) and the process proceeds to step S214. If the water drain button 45 is OFF (step S211; No), the water drain flag is set to OFF (step S213) and the process proceeds to step S214. In addition, when the water supply drainage flag is set to ON, water is supplied to the tank 12 in the tank supply process regardless of whether the bath water is available.

  In step S214, it is checked whether the continuous operation time using medium water is less than a predetermined set operation time. The middle water use continuous operation time is an elapsed time since the middle water supply pipe 21 was washed last time. The CPU or the like of the control board 18 measures the continuous water use continuous operation time.

  If the middle water use continuous operation time is equal to or longer than the set operation time (step S214; No), the pipe cleaning flag is turned on (step S215), and the process returns to step S201 to continue the processing. If the middle water use continuous operation time is less than the set operation time (step S214; Yes), the process returns to step S201 to continue the process.

  FIG. 6 shows details of the pipe cleaning process (step S204 in FIG. 5). In the pipe cleaning process, hot water in the tank 12 is poured into the toilet bowl 3 to empty the tank 12, and then water is stored in the tank 12 from the water supply pipe 23 to reach the maximum water level. Thereafter, waiting for the tub 2 to be unplugged, and when the tub 2 is unplugged, the water in the tank 12 flows from the intermediate water supply pipe 21 to the bathtub 2 to wash the intermediate water supply pipe 21. Such control is performed.

  When emptying the tank 12, the water in the tank 12 is simply drained to the toilet bowl 3. Therefore, after the tank 12 is set to the highest water level last time, the toilet 12 is washed a predetermined number of times (four times in this case) based on pressing of the middle water drain button 44, and the amount of water in the tank 12 is sufficiently reduced. After that, the small amount of water remaining in the tank 12 is forcibly drained to the toilet 3 so that the tank 12 is completely emptied. When the tank 12 is emptied, both the first electrode 14a and the second electrode 14b of the tank water level sensor 14 are exposed.

  Thereafter, the tank 12 is supplied with clean water to the maximum water level. When replenishing clean water, the tank water level sensor 14 in the tank 12 is washed. After replenishing clean water, wait for the tub 2 to be unplugged. In the pipe cleaning, the dirty water that has washed the middle water supply pipe 21 is discharged into the bathtub 2, and therefore it is necessary to perform the pipe cleaning with the stopper of the bathtub 2 removed. Here, it is detected that the tap has been removed by a sudden decrease in the water level of the bathtub, and the tap water in the tank 12 is discharged from the intake port 2a to the bathtub 2 through the middle water supply pipe 21 at the timing when the tap is removed. The inside of the middle water supply pipe 21 is washed. The dirty water that has washed the intermediate water supply pipe 21 is discharged from the drain outlet of the bathtub 2 to the outside.

  The sudden decrease in the bath water level does not include a slight decrease in water level due to normal evaporation or leakage from a plugged drain. Specifically, based on the drop rate of the bathtub water level when the bathtub water is drained from the drain port with the smallest diameter assumed as the drain port of the bathtub, the drop rate is slower than this drop rate by a certain margin amount. A rapid decrease is determined as a threshold value. For example, here, the case where the water level is lowered continuously for a certain period of time at a speed of 5 cm / min or more is detected as a sudden decrease in the bathtub water level.

  When the water level of the bathtub 2 rises during the cleaning of the middle water supply pipe 21, it is recognized that the drain outlet of the bathtub 2 has been plugged, and the display unit 41 of the remote control 40 indicates that “the bathtub plug is opened. Please display a warning.

  The cleaning of the intermediate water supply pipe 21 is performed by alternately generating a period in which clean water is supplied from the tank 12 to the intermediate water supply pipe 21 and a period in which the water is not supplied. The dirty water that has washed the intermediate water supply pipe 21 is completely removed from the intermediate water supply pipe 21, and then the next cleaning is performed, whereby the intermediate water supply pipe 21 is efficiently cleaned with a small amount of water.

  By the way, there is a user who wants to keep water in the bathtub 2 even after the automatic operation of the bath is finished and to use the bathtub water as a water reserve at the time of disaster. Since such a user unplugs the bathtub 2 just before filling the next day, it is inconvenient for such a user to detect that the bathtub 2 has been unplugged and automatically start pipe cleaning. . Therefore, the automatic cleaning of the pipe may be prohibited for 15 to 24 hours after hot water is filled in the bathtub 2 (after the water level is detected).

  Details of the pipe cleaning process will be described with reference to FIG.

  First, it is checked whether or not the drainage completion flag is ON (step S301). The drainage completion flag is a flag indicating whether or not the tank 12 has been emptied, and indicates that the tank 12 is empty when ON.

  If the drainage completion flag is not ON (step S301; No), it is checked whether the water level in the tank 12 is lower than the minimum water level (step S302). For example, when the tank water level sensor 14 having the structure shown in FIG. 2 is used, if the second electrode 14b does not detect water, it is determined that the level is lower than the minimum water level.

  If it is less than the lowest water level (step S302; Yes), the process proceeds to step S305. If there is water above the minimum water level in the tank 12, specifically, if the second electrode 14b has detected water (step S302; No), it is checked whether the middle water drainage counter is 4 or more ( Step S303). That is, it is checked whether or not the toilet 3 has been washed four or more times based on the middle water drainage button 44 after the tank 12 has reached the maximum water level.

  If the middle water drainage counter is less than 4 (step S303; No), this process is once ended (return). Since the process of FIG. 5 is repeatedly performed continuously, the pipe cleaning process of FIG. 6 is performed every time the process of FIG. 5 completes while the pipe cleaning flag is ON even if the pipe cleaning process is once ended. Executed. If the middle water drainage counter is 4 or more (step S303; Yes), the process proceeds to step S305.

  In step S305, the drain electromagnetic valve 28 is opened (step S305), and the water remaining in the tank 12 is drained to the toilet bowl 3. Then, the tank 12 is completely emptied by waiting for 5 seconds after the water level of the tank 12 falls below the minimum water level (step S306; No). When the tank 12 is completely emptied after 5 seconds from the time when the water level of the tank 12 becomes lower than the minimum water level (Step S306; Yes), the drain electromagnetic valve 28 is closed (Step S307), and the drain complete flag is set. Turn on (step S308).

  Next, the tank 12 is replenished with clean water to the highest water level (step S309). Specifically, it is checked whether or not the water level of the tank 12 has reached the maximum water level from the detection water level of the tank water level sensor 14. If the water level has not reached the maximum water level, the water solenoid valve 24 is opened to supply water to the tank 12. When the water level of the tank 12 reaches the maximum water level, the water solenoid valve 24 is closed. When the tank 12 is supplied with fresh water, the display 41 of the remote controller 40 displays “no medium water, using fresh water” or “using fresh water”.

  When the supply of the clean water to the tank 12 is completed up to the maximum water level, the middle water drainage counter is reset to 0 (step S310). And it is investigated whether the water level of the bathtub 2 is decreasing rapidly (step S311), and if not decreasing rapidly (step S311; No), this process will be once complete | finished (return). Since the process of FIG. 5 is repeatedly and continuously performed, the pipe cleaning process is executed again after the present process is temporarily ended, not rapidly decreasing. In the next pipe cleaning process, since the drainage completion flag has already been turned ON, the result of step S301 is Yes and the process proceeds to step S309. That is, it waits for the water level of the bathtub 2 to decrease rapidly.

  If the water level of the bathtub 2 is decreasing rapidly (step S311; Yes), it waits for the water level of the bathtub 2 to become less than a predetermined water level (step S312; Yes). The predetermined water level may be, for example, the lowest water level that can be detected by the bathtub water level sensor 13, or any low water level such as about 15 cm. The level below the predetermined water level is “no bathtub water level”, and the level above the predetermined water level is “with bathtub water level”.

  When the water level of the bathtub 2 is lowered until there is no bathtub water level (step S312; No), the intermediate water electromagnetic valve 22 that opens and closes the intermediate water supply pipe 21 is opened, the pump 11 is rotated in the reverse direction, and fresh water in the tank 12 is added to the bathtub. The inside of the middle water supply pipe 21 is washed by flowing toward the second water intake 2a.

  When the water level in the tank 12 falls below the minimum water level (step S314; Yes), the intermediate water solenoid valve 22 is closed and the pump 11 is stopped, the water solenoid valve 24 is opened, and the tank 12 is replenished with clean water. (Step S315). At this time, if the bathtub water level is present (step S316; Yes), the water level in the bathtub 2 has risen by discharging the water in the tank 12 from the intermediate water supply pipe 21 to the bathtub 2, so It can be estimated that it was closed. Therefore, a warning such as “please open the bathtub tap” is displayed on the display unit 41 of the remote controller 40 (step S317), and the process returns to step S316. The warning display continues until there is no bathtub water level.

  If there is no bathtub water level (step S316; No), it will transfer to step S318. Moreover, if the water level in the tank 12 is not below the minimum water level (step S314; No), it will transfer to step S318.

  In step S318, it is checked whether or not the water level in the tank 12 is the highest water level. If it is not the highest water level (step S318; No), the process proceeds to step S320. When the maximum water level is reached (step S318; Yes), the middle water solenoid valve 22 of the middle water supply pipe 21 is opened, the pump 11 is rotated in the reverse direction, and the water solenoid valve 24 is closed (step S319). That is, the replenishment of clean water is terminated, and the clean water in the tank 12 is washed by flowing clean water in the tank 12 to the neutral water supply tube 21.

  In step S320, it is checked whether or not the cleaning time has reached a preset cleaning time. If the cleaning for the set cleaning time is not completed (step S320; No), the process returns to step S314 and the process is continued. By the processing between steps S314 to S320, the operation for alternately generating a period of cleaning by flowing clean water from the tank 12 to the middle water supply pipe 21 and a period of not flowing (cleaning suspension period) is completed. Is done.

  When the set cleaning time is completed (step S320; Yes), the intermediate water electromagnetic valve 22 is closed, the pump 11 is stopped, and the water electromagnetic valve 24 is closed (step S321). Next, the pipe cleaning flag is turned OFF, the middle water use continuous operation time is reset to 0, the drainage completion flag is turned OFF (Step S322), and this process is terminated (Return).

  When the pipe cleaning button 46 of the remote controller 40 is operated (when a manual pipe cleaning instruction is received), this processing starts from step S304. That is, the pipe cleaning flag is set to ON (step S304), and the process proceeds to step S305.

  Since automatic pipe cleaning is performed after the tank 12 is almost empty, in some cases, such a situation does not occur easily, and automatic pipe cleaning may not be performed for a long period of time. For this reason, pipe cleaning can be performed by an instruction from the user (operation of the pipe cleaning button 46). Note that if the elapsed time since the pipe cleaning flag is turned on exceeds the upper limit value, steps S302 and S303 are skipped, and the process proceeds to step S305 to forcibly execute the pipe cleaning. May be. Alternatively, when the elapsed time after the pipe cleaning flag is turned on exceeds an upper limit value, a warning display that prompts the user to operate the pipe cleaning button 46 may be displayed on the display unit 41 of the remote controller 40.

  FIG. 7 shows the tank replenishment process (step S208 in FIG. 5). In the tank replenishment process, when the amount of water in the tank 12 has decreased by a certain level or more, the bathtub water is pumped from the bathtub 2 to the tank 12 or replenished, or the water is replenished to the tank 12 through the water supply pipe 23. In this process, the operation of pumping up the bathtub water from the bathtub 2 to the tank 12 is performed at the following timing on the condition that the automatic operation of the bath has been completed.

(1) Immediately after the automatic operation of the bath is finished (2) When the bath water level suddenly decreases (3) Every time the toilet 3 is washed twice with drainage of the middle water Here, the replenishment operation of (1) Only when the amount of water in the inside has decreased more than a certain level. However, even if the amount of water in the tank 12 does not decrease more than a certain amount, the tank 12 may be pumped up to the highest water level immediately after the automatic operation of the bath is finished.

  The supply of clean water is performed when the bath water cannot be used (the automatic bath operation has not been completed or the bath water level is not present), or when the clean water discharge mode is set.

  In the tank replenishment process, the temperature of the hot water to be replenished is adjusted so that the water temperature in the tank 12 becomes equal to or higher than the sterilizable temperature (here, 60 ° C.) when the tank 12 is replenished with the bath water to the maximum water level. Control. That is, the combustion amount of the bath water heater 60 that performs the reheating operation is controlled. In addition, when the bathtub water in the bathtub 2 is insufficient while the bathtub water is being replenished to the tank 12 by the chasing operation, the hot water is supplied to the tank 12 by the hot water supply operation of the bath water heater 60. Also in this case, the temperature of hot water to be replenished is controlled so that the water temperature in the tank 12 becomes 60 ° C. or higher when replenishing to the maximum water level. That is, the combustion amount of the bath water heater 60 that performs the hot water supply operation is controlled.

  By replenishing the heated water to the tank 12, the toilet heating using the heat of the hot water in the tank 12 to be described later can be efficiently performed.

  Details of the tank replenishment process of FIG. 7 will be described. First, it is checked whether or not there is a certain amount or more of bathtub water (there is a bathtub water level) in the bathtub 2 (step S401). If there is no bathtub water level (step S401; No), it is checked whether the middle water drainage counter is 3 or more (step S402; No). If not, the tank 12 still has water. This process is finished (return).

  If there is no bathtub water level (step S401; No) and the middle water drainage counter is 3 or more (step S402; Yes), the tank 12 is replenished with clean water to bring the tank 12 to the highest water level (step S403). Then, the middle water drainage counter is reset to 0 (step S404), and this process is terminated (return).

  If there is more than a certain amount of bathtub water in the bathtub 2 (there is a bathtub water level) (step S401; Yes), it is checked whether or not the water level of the bathtub 2 is rapidly decreasing (step S405). If the water level of the bathtub 2 is not rapidly decreasing (step S405; No), it is checked whether the middle water drainage counter is 2 or more (step S406). If the middle water drainage counter is not 2 or more (step S406; No), the tank 12 still has water, so this process is terminated without replenishing water (return).

  When the middle water drainage counter is 2 or more (step S406; Yes), or when the water level of the bathtub 2 is rapidly decreasing in step S405 (step S405; Yes), it is checked whether or not the water drainage flag is ON ( Step S407). If the water drainage flag is ON (step S407; Yes), the water drainage button 45 is operated to set the water drainage mode, and the process proceeds to step S403.

  If the water drainage flag is not ON (step S407; No), it is checked whether the hot water filling end flag is ON (step S408). If the hot water filling end flag is not ON (step S408; No), the automatic bath operation has not ended (during operation), so the process proceeds to step S402. Process to replenish water.

  If the hot water filling end flag is ON (step S408; Yes), the bath water supplied by the bath water heater 60 is replenished with heated bath water. Specifically, the pump 11 of the bath water heater 60 is operated, the three-way valve 67 is switched to the tank side, and the bath water heater 60 is set so that the temperature of the hot water sent from the bath water heater 60 to the tank 12 is 60 ° C. or higher. It sets and starts reheating combustion, and the middle water solenoid valve 22 is opened (step S409).

  After that, when the water level in the tank 12 reaches the maximum water level (step S410; Yes), the pump 11 is stopped, the three-way valve 67 is switched to the bathtub side, the reheating combustion of the bath water heater 60 is stopped, The valve 22 is closed (step S412), the middle water drainage counter is reset to 0 (step S413), and this process is terminated (return).

  Before the water level in the tank 12 reaches the maximum water level (step S410; No), when the hot water in the bathtub 2 runs out (no bath water level) (step S411; No), the middle water solenoid valve 22 is turned on. The pump 11 is closed, the three-way valve 67 is switched to the bathtub side, and the reheating combustion of the bath water heater 60 is stopped (step S414).

  Next, it is calculated how many hot waters should be poured into the tank 12 (step S415). Specifically, the pouring temperature for setting the water temperature in the tank 12 to 60 ° C. or higher when the maximum water level is reached from the detected temperature of the temperature sensor 15 provided in the tank 12 and the detected water level of the tank water level sensor 14. Is calculated. In this case, the tank water level sensor 14 needs to detect an arbitrary water level like a pressure sensor.

Specifically, the current water temperature in the tank 12 is T1, the current water amount in the tank 12 obtained based on the detected water level of the tank water level sensor 14 is V1, the water amount at the highest water level in the tank 12 is Vmax, and the highest water level. When the target water temperature in the tank 12 is Ta and the pouring temperature from the bath water heater 60 is Tb,
V1 × T1 + (Vmax−V1) × Tb ≧ Vmax × Ta
Tb is determined so that the relationship is established. For example, Ta is set to 60 ° C. In addition, what is necessary is just to make hot water pouring temperature higher, when reaching the sterilizable temperature at the predetermined water level before the tank 12 is full. In the above equation, Ta may be obtained by substituting the amount of water at a predetermined water level instead of Vmax.

  Next, the bath water heater 60 is heated and combusted so that hot water at the calculated pouring temperature is produced, and hot water obtained by heating the water supply is replenished from the bath water heater 60 to the tank 12 through the intermediate water supply pipe 21. At this time, the display unit 41 of the remote controller 40 displays “no medium water, hot water is being used” (step S416).

  The above hot water supply operation is performed until the water level of the tank 12 reaches the maximum water level (step S417; No), and when the water level of the tank 12 reaches the maximum water level (step S417; Yes), the bath 12 is supplied from the bath water heater 60. The hot water supply operation is stopped (step S418). Thereafter, the middle water drainage counter is reset to 0 (step S419), and this process is terminated (return).

  In this way, since the hot water is supplied to the tank 12 so that the water temperature in the tank 12 becomes equal to or higher than the sterilizable temperature, the inside of the tank 12 is sterilized, and the inside of the tank becomes dirty or smells due to the propagation of bacteria. Is prevented from occurring.

  Moreover, since hot water is replenished to the tank 12, the water temperature in the tank 12 is less likely to be lower than the temperature at which heating is possible, and the toilet heating described later can be continuously performed using the heat of the hot water in the tank 12. it can.

  In addition, when bath water is reheated and replenished to the tank 12 in step S409, how many times the temperature of the hot water should be replenished is calculated in the same manner as in step S415, and the temperature obtained by the calculation is obtained. The temperature may be increased and the tank 12 may be replenished. That is, the reheating temperature for setting the water temperature in the tank 12 to 60 ° C. or higher when the maximum water level is reached is calculated from the detection temperature of the temperature sensor 15 provided in the tank 12 and the detection water level of the tank water level sensor 14. Then, the reheating operation in step S409 may be performed so as to raise the temperature to the calculated temperature.

  When the hot water is supplied to the tank 12, the temperature of the hot water may be controlled as follows. First, after the hot water supply is started until the water temperature in the tank 12 (detected temperature of the temperature sensor 15) reaches the sterilizable temperature, the hot water heated to the temperature Tc higher than the sterilizable temperature is supplied to the tank 12. After the water temperature in the tank 12 reaches the sterilizable temperature, at least the hot water heated to the sterilizable temperature is supplied to the tank 12.

  For example, when the temperature Tc is set to the highest temperature that can be raised by the bath water heater 60, the possibility that the tank 12 reaches the highest water level before the water temperature in the tank 12 reaches the sterilizable temperature can be reduced. In a specific example, 80 ° C. hot water was supplied to the tank 12 at the beginning of replenishment, and when the water temperature in the tank 12 reached 60 ° C., if 60 ° C. hot water was supplied to the tank 12 thereafter, the maximum water level was reached. Sometimes the water temperature in the tank 12 can be 60 ° C. In this method, there is no need to detect the water level of the tank 12 with a pressure sensor or the like, and there is an advantage that a simple tank water level sensor 14 can be used.

  In addition, the apparatus heated in the middle of transferring bathtub water to the tank 12 is not limited to the bath water heater 60, A separate heat source machine may be sufficient.

  Moreover, the path | route which sends the hot water heated with the hot water supply function from the bath water heater 60 to the tank 12 may be the middle water supply pipe | tube 21, for example, and good also as separate piping. For example, in a bath water utilization apparatus 10B described later shown in FIG. 10, a heat source device may be provided in the middle of the intermediate water supply pipe 21, and hot water being transferred may be heated by the heat source device.

  Next, toilet heating will be described.

  The bathtub water utilization device 10 heats the toilet using the heat of the hot water in the tank 12. Specifically, a fan 32 sends a wind to a heat exchanger 31 that dissipates the heat of hot water in the tank 12, and the wind is sent from a vent 33 provided on the ceiling of the toilet into the toilet room for heating. In addition, the operation of the ventilation fan 37 of the toilet and the operation of the fan 32 of the heat radiating unit 17 are controlled to achieve both ventilation and efficient heating when using the toilet.

  Specifically, the human sensor 35 detects a person, and the ventilation fan 37 is operated and ventilated while the toilet is in use and until a predetermined time has elapsed after use, and the fan 32 of the heat radiating unit 17 is stopped (heating is stopped). Stop). In other periods, the ventilation fan 37 is stopped. In other periods, if the temperature of the hot water in the tank 12 is equal to or higher than the temperature at which heating is possible, the fan 32 of the heat radiating unit 17 is operated to heat the toilet.

  When performing toilet heating, it is preferable that the tank 12 has a heat retaining structure.

  FIG. 8 shows details of the toilet heating process (step S209 in FIG. 5). This process is repeatedly executed every time the process of FIG. When the human sensor 35 provided in the toilet is ON (detects a person) (step S501; Yes), the ventilation fan 37 is operated (step S504), and the fan 32 of the heat radiating unit 17 is stopped ( Step S505), the process ends (return).

  When the human sensor 35 is OFF (no person is detected) (step S501; No), it is checked whether or not the toilet heating is set to ON by the toilet heating button 49 of the remote controller 40 (step S502). ). When toilet heating is set to ON (step S502; Yes), the water temperature in the tank 12 (detected temperature of the temperature sensor 15) is a temperature obtained by adding a predetermined temperature (for example, 10 ° C.) to the heating set temperature ( It is checked whether the temperature is higher than the heating possible temperature (step S503).

  When the water temperature in the tank 12 (detected temperature of the temperature sensor 15) is equal to or lower than the heating possible temperature (step S503; No), the fan 32 of the heat radiating unit 17 is turned off (step S505), and this process is terminated (return). ).

  When the water temperature in the tank 12 (detected temperature of the temperature sensor 15) is higher than the temperature at which heating is possible (step S503; Yes), it is checked whether or not a predetermined time has elapsed since the human sensor 35 was turned off ( Step S506). If the predetermined time has not elapsed since the human sensor 35 is turned off (step S506; No), the process is ended without heating because the air is being ventilated (return). When the predetermined time has elapsed since the human sensor 35 is turned off (step S506; Yes), the ventilation fan 37 is turned off (step S507), and the fan 32 of the heat radiating unit 17 is turned on (step S508). ) The toilet is heated and the process is terminated (return). The predetermined time can be arbitrarily changed by the remote controller 40 or the like. For example, it can be set between 3 minutes and 10 minutes.

  When toilet heating is set to OFF (step S502; No), the fan 32 of the heat radiating unit 17 is turned off (step S509). If the predetermined time has not elapsed since the human sensor 35 is turned off (step S510; No), this processing is ended (return) and ventilation is continued, and the human sensor 35 is turned off. If the predetermined time has elapsed (step S510; Yes), the ventilation fan 37 of the toilet is turned off (step S511), the ventilation is stopped, and this process is terminated (return).

  Thus, since the ventilation fan 37 of the toilet is stopped except during use, the toilet can be efficiently heated using the heat of hot water in the tank 12. In addition, the ventilation fan 37 is operated for a predetermined time during and after use of the toilet to ensure ventilation, and during this time, the fan 32 of the heat dissipating unit 17 is stopped, so that the heat in the tank 12 is not wasted, The heat of the hot water in the tank 12 can be used effectively.

  Next, a drainage process for draining hot water from the tank 12 and washing the toilet bowl 3 will be described.

  In the drainage treatment, when the middle water drainage button 44 of the remote controller 40 is pressed, the set amount of water in the tank 12 is drained to the toilet 3. If the water in the tank 12 is insufficient during drainage, continue draining while replenishing the tank 12 with clean water. After the set amount of drainage is completed, tank the clean water until the tank 12 reaches the maximum water level. Supply to 12. This case may occur after recovery from a power failure.

  The bath water utilization device 10 resets the middle water drainage counter to 0 when the tank 12 is supplied with clean water or bathtub water to the maximum water level, and each time the toilet 3 is washed by the operation of the middle water drainage button 44, The operation is such that the drain counter is incremented by 1 and the water or bath water is replenished to the tank 12 again when the intermediate water drain counter reaches 2 or more. That is, water is supplied to the tank 12 every time the toilet bowl 3 is washed twice. Since the capacity of the tank 12 is such that the toilet 3 can be washed about four times, the water in the tank 12 is insufficient during drainage from the tank 12 to the toilet 3 as long as it is replenished after every two washings as described above. There is nothing.

  However, if a power failure occurs, the middle water drainage counter is reset to 0. For example, when the middle water drainage counter is counted up to 2, if a power failure occurs, the amount of water in the tank 12 is reduced when the power is restored from the power failure. Despite being reduced by two washings, the middle water drainage counter is zero. Therefore, drainage is performed from the tank 12 to the toilet 3 without replenishing water, and there is a situation where water in the tank 12 is insufficient during drainage.

  Even if the middle water drainage counter is constituted by a non-volatile counter that is not reset even if the power is turned off (the count value is not lost), the manual flush valve 29 is operated during a power failure to drain the water from the tank 12 to the toilet 3. In such a case, the water level in the tank 12 at the time of recovery from the power failure becomes inconsistent with the value of the middle water drainage counter, and the water in the tank 12 is drained from the tank 12 to the toilet 3 after recovery from the power failure. There may be a phenomenon of lack of.

  FIG. 9 shows details of the waste water treatment (step S210 in FIG. 5). This process is repeatedly executed every time the process of FIG. The bathtub water utilization apparatus 10 checks whether or not the middle water drain button 44 of the remote controller 40 has been pressed and turned on (step S601). When the middle water drain button 44 is not turned on (step S601; No), this process is terminated (return).

  When the middle water drain button 44 is turned on (step S601; Yes), the middle water drain counter is counted up (+1) (step S602). Subsequently, the drain electromagnetic valve 28 of the drainage unit 16 is opened (step S603), and the drainage is discharged from the tank 12 to the toilet 3 through the drainage pipe 26, and the amount of drainage is measured by the flow sensor 27.

  During drainage, whether the drainage amount has reached the set water amount (step S604) and whether the tank 12 has run out of water during drainage (the second electrode 14b of the tank water level sensor 14 no longer detects the water level). Is monitored (step S605).

  When the water in the tank 12 is insufficient during drainage (step S605; Yes), the manual water use flag is set to ON (step S606), and the water solenoid valve 24 of the water supply pipe 23 is opened (step S606). S607), the process returns to step S604 to continue draining. That is, clean water is supplied to the tank 12 while draining from the tank 12.

  When the amount of drainage reaches the set amount of water (step S604; Yes), the drainage electromagnetic valve 28 is closed to stop drainage from the tank 12 (step S608), and the water supply solenoid valve 24 is closed to supply water to the tank 12 Is stopped (step S609). Thereafter, it is checked whether or not the manual water use flag is ON. If it is not ON (step S610; No), this process ends (return). If the manual water use flag is ON (step S610; Yes), water is supplied to the tank 12 until the tank 12 reaches the maximum water level (step S611), and the manual water use flag is reset to OFF (step S611). S612), this process ends (return).

  Next, a second embodiment of the present invention will be described.

  FIG. 10 shows the configuration and installation state of a bathtub water use device 10B according to the second embodiment of the present invention. The same code | symbol is attached | subjected to the same location as the bathtub water utilization apparatus 10 which concerns on 1st Embodiment shown in FIG. 1, and those description is abbreviate | omitted suitably.

  In 2nd Embodiment, the pump 11b and the bathtub water level sensor 13b are provided in the bathtub water utilization apparatus 10B, without using the pump 11 and the bathtub water level sensor 13 of the reheating circuit of the bath water heater 60. The intermediate water supply pipe 21 connects the water intake 2 a of the bathtub 2 and the tank 12. The bathtub water level sensor 13 b and the pump 11 b are inserted in the middle water supply pipe 21. In this example, the bathtub water level sensor 13b and the pump 11b are provided in the vicinity of the intake port 2a of the bathtub 2, that is, in a low place at the same height as the intake port 2a (or lower than the intake port 2a). Thereby, priming water can be easily taken in from the bathtub 2 to the pump 11b.

  Moreover, the bathtub water utilization apparatus 10B which concerns on 2nd Embodiment is equipped with the heat exchanger 58 in the tank 12, and raises the temperature of the water in the tank 12 with this heat exchanger 58, and has the function to disinfect. I have. By raising the temperature of the water in the tank 12, heat for toilet heating can be obtained. Moreover, the temperature in the tank 12 can be sterilized by raising the temperature of the water in the tank 12 to a sterilizable temperature. Here, an example of raising the temperature to a sterilizable temperature will be described.

  The bath water heater 70 has a function of filling and bathing the bathtub 2 and a function of circulating the heat medium heated by the bath water heater 70 in the circulation circuit 74 via the heat exchanger 58 in the tank 12 (heating). Function). The bath water heater 70 includes a heat exchanger 71 for heating the heat medium circulating in the circulation circuit 74, a burner 72 for heating the heat exchanger 71, and a circulation pump 73 for circulating the heat medium in the circulation circuit 74. It has. If a radiator for indoor heating is connected to the circulation circuit 74, indoor heating or the like can be performed.

  The bath water utilization device 10B, when sterilizing the tank 12, causes the bath water heater 70 to perform a heating operation that activates the circulation pump 73 by burning the burner 72 and raises the hot water in the tank 12 to a temperature higher than the sterilizable temperature. Warm up. Bathtub water utilization apparatus 10B performs the sterilization process by heating operation, every time predetermined setting time passes.

  Moreover, the bathtub water utilization apparatus 10B performs the toilet heating process shown in FIG. 11 instead of the toilet heating process of FIG. In the toilet heating process of FIG. 11, when the water temperature in the tank 12 is equal to or lower than the temperature at which heating is possible (heating set temperature + predetermined temperature), the bath water heater 70 is heated, and heat is released from the heat exchanger 58 to generate heat in the tank 12. Raise the temperature of the hot water.

  In FIG. 11, the same step number is attached | subjected to the step of the same content as the toilet heating process of FIG. First, when the human sensor 35 provided in the toilet is ON (detects a person) (step S501; Yes), the ventilation fan 37 is operated to ventilate (step S504), and the fan 32 of the heat radiating unit 17 is provided. Is stopped (step S505), and this process is terminated (return).

  When the human sensor 35 is OFF (no person is detected) (step S501; No), it is checked whether or not the toilet heating is set to ON by the toilet heating button 49 of the remote controller 40 (step S502). ). When toilet heating is set to ON (step S502; Yes), it is investigated whether the water temperature (detected temperature of the temperature sensor 15) in the tank 12 is higher than the heating possible temperature (step S503).

  When the water temperature in the tank 12 (detected temperature of the temperature sensor 15) is equal to or lower than the heating possible temperature (step S503; No), the heating operation by the bath water heater 70 is started (step S520), and the water temperature in the tank 12 is sterilized. The heating operation is continued until the temperature reaches a possible temperature (here, 60 ° C.) or higher (step S521; No). When the water temperature in the tank 12 reaches a sterilizable temperature (step S521; Yes), the heating operation is stopped. (Step S522), the process ends (return).

  When the water temperature in the tank 12 (detected temperature of the temperature sensor 15) is higher than the temperature at which heating is possible (step S503; Yes), it is checked whether or not a predetermined time has elapsed since the human sensor 35 was turned off ( Step S506). If the predetermined time has not elapsed since the human sensor 35 is turned off (step S506; No), ventilation is continued and this process is terminated (return). When the predetermined time has elapsed since the human sensor 35 is turned off (step S506; Yes), the ventilation fan 37 is turned off (step S507), and the fan 32 of the heat radiating unit 17 is turned on (step S508). ), This process ends (return).

  When toilet heating is set to OFF (step S502; No), the fan 32 of the heat radiating unit 17 is turned off (step S509). If the predetermined time has not elapsed since the human sensor 35 is turned off (step S510; No), this process is terminated (return), and the predetermined time has elapsed after the human sensor 35 is turned off. If it has elapsed (step S510; Yes), the ventilation fan 37 of the toilet is turned off (step S511), and this process is terminated (return).

  FIG. 11 shows the details of the sterilization process. The sterilization process is executed every time the process of FIG. For example, it is inserted between step S209 and step S210.

  First, it is checked whether or not toilet heating is turned off (step S701). If toilet heating is turned on (step S701; No), this process is terminated (return). As shown in FIG. 13, since the tank 12 is sterilized by the heating operation for toilet heating while the toilet heating button 49 of the remote controller 40 is ON, the sterilization in the sterilization process is performed by the toilet heating. Only executed when the button 49 is OFF.

  If the toilet heating is OFF (step S701; Yes), it is checked whether a predetermined set time has elapsed since the previous sterilization (step S702). If the predetermined set time has not elapsed since the previous sterilization (step S702; No), this process is terminated (return).

  When the predetermined set time has elapsed since the previous sterilization (step S702; Yes), the heating operation by the bath water heater 70 is started (step S703). The heating operation is continued until the water temperature in the tank 12 reaches or exceeds the sterilizable temperature (here, 60 ° C.) (step S704; No), and the water temperature in the tank 12 reaches the sterilizable temperature (step S704; Yes). The heating operation is stopped (step S705), and this process is terminated (return).

  In the toilet heating process of FIG. 11, it is checked whether or not a predetermined set time has elapsed since the previous sterilization. If not, the temperature is raised to a predetermined temperature that is higher than the heatable temperature and lower than the sterilizable temperature. If it has elapsed, the temperature may be raised to a sterilizable temperature.

  FIG. 13 shows a configuration example (tub water utilization device 10C) when the bath water heater 60 shown in the first embodiment has the heating function of the bath water heater 70 of the second embodiment. Show. In this case, sterilization in the tank 12 may be performed by either the method shown in the first embodiment or the method shown in the second embodiment.

  The embodiment of the present invention has been described with reference to the drawings. However, the specific configuration is not limited to that shown in the embodiment, and there are changes and additions within the scope of the present invention. Are also included in the present invention.

  For example, the water intake 2a may be provided at the bottom of the bathtub 2 as shown in FIG. As a result, more remaining hot water can be transferred to the tank 12 for use.

  Moreover, as shown in FIG. 15, the pump 11b may be installed above the ceiling. In addition, when the pump 11b is installed upward, even if the pump 11b is operated in the forward direction, the bath water is not sucked at first. Therefore, a test operation mode or the like is provided. First, water is stored in the tank 12 (for example, the water solenoid valve 24 is opened to store water), and then the pump 11b is reversed to supply water from the tank 12 to the pump 11b. You may make it reverse flow and give priming water to the pump 11b.

  The toilet bowl 3 may have a low tank (without hand washing). In the case with a low tank, the flow sensor 27 may not be provided. Further, for example, the drain electromagnetic valve 28 and the manual flush valve 29 may not be provided.

  In the embodiment, the drainage amount is measured by the flow sensor 27, and the drainage electromagnetic valve 28 is controlled to be closed when the set amount of water is drained in response to one operation of the middle water drainage button 44. The drain electromagnetic valve 28 may be closed with drainage.

  In the embodiment, the water supply timing to the tank 12 is managed by the middle water drainage counter. For example, the remaining water amount in the tank 12 is recognized from the drainage amount detected by the flow sensor 27 after the tank 12 is set to the maximum water level. Thus, the water supply time or the like may be controlled.

  In the embodiment, the tank 12 is installed behind the ceiling of the toilet. However, as long as the tank 12 is above the toilet 3, that is, the water in the tank 12 may be drained from the tank 12 to the toilet 3 by natural fall using potential energy. It is not limited to the ceiling.

  The use of the water stored in the tank 12 is not limited to the cleaning of the toilet bowl 3. It may be automatic watering of garden trees.

DESCRIPTION OF SYMBOLS 2 ... Bathtub 2a ... Water intake 3 ... Toilet 10, 10B, 10C ... Bath water utilization apparatus 11, 11b ... Pump 12 ... Tank 13, 13b ... Bath water level sensor 14 ... Tank water level sensor 14a ... 1st electrode 14b ... 2nd Electrode 15 ... Temperature sensor 16 ... Drainage part 17 ... Radiation part 18 ... Control board 21 ... Middle water supply pipe 22 ... Middle water solenoid valve 23 ... Water supply water supply pipe 24 ... Water supply solenoid valve 26 ... Drainage pipe 27 ... Flow sensor 28 ... Drainage solenoid valve 29 ... Manual flush valve 31 ... Heat exchanger 32 ... Fan 33 ... Vent 35 ... Human sensor 37 ... Ventilation fan 40 ... Remote control 41 ... Display unit 42 ... Operation button 43 ... Setting button 44 ... Middle water Drain button 45 ... Water drain button 46 ... Pipe cleaning button 47 ... Up / down key 48 ... Lamp 49 ... Toilet heating button 51 ... Ventilation duct 52 ... Ventilation fan 54 ... Outdoor drain piping 55 ... Out Faucet 56 ... Deodorizing device 58 ... Heat exchanger 60 ... Bath water heater 61 ... Heat exchanger 62 ... Burner 63 ... Bath return pipe 64 ... Bath outlet pipe 67 ... Three-way valve 70 ... Bath water heater 71 ... For heating circuit Heat exchanger 72 ... Burner for heating circuit 73 ... Circulating pump for heating circuit 74 ... Circulating circuit

Claims (7)

A pump that pumps the water in the bathtub,
A tank for storing water pumped up by the pump;
A drainage section for draining hot water in the tank to a predetermined outlet according to a request for reuse of hot water in the tank;
A heat source device that raises the water temperature in the tank to a predetermined sterilizable temperature or higher;
A temperature sensor for detecting the water temperature in the tank;
A water amount sensor for detecting the amount of water in the tank;
I have a,
The heat source unit is configured to transfer the water being transferred from the bathtub to the tank by the pump, when the tank is full at the latest from the detected water amount of the water sensor and the detected temperature of the temperature sensor. A bath water utilization device, wherein the temperature of the water is raised so that the water temperature reaches the sterilizable temperature . A pump that pumps the water in the bathtub,
A tank for storing water pumped up by the pump;
A drainage section for draining hot water in the tank to a predetermined outlet according to a request for reuse of hot water in the tank;
A heat source device that raises the water temperature in the tank to a predetermined sterilizable temperature or higher;
A temperature sensor for detecting the water temperature in the tank ;
With
The heat source device raises the temperature of water being transferred from the bathtub to the tank by the pump, and before the detected temperature of the temperature sensor reaches the sterilizable temperature, the water being transferred is more than the sterilizable temperature. the temperature was raised to a high temperature, after said temperature detected by the temperature sensor reaches the sterilizable temperature, the water in the transfer you characterized in that heating to the sterilizable temperature bath tub water utilizing apparatus. The heat source machine, before the detection temperature of the temperature sensor reaches the sterilizable temperature water in the transfer to claim 2, wherein increasing the temperature to warm the maximum possible temperature in the heat source equipment The bathtub water utilization apparatus of description. The heat source machine has a hot water supply function,
The bath water use according to any one of claims 1 to 3 , wherein when the water in the bathtub becomes insufficient during the transfer, the tank is replenished with hot water obtained by the hot water supply function. apparatus. As the pump, using a circulation pump of a reheating circuit provided in a bath water heater that performs hot water filling and reheating to the bathtub,
The hot water in the bathtub is transferred to the tank through a pipe branched from the reheating circuit,
The bath water heater according to any one of claims 1 to 4 , wherein the bath water heater is used as the heat source device. The said drainage part drains the water in the said tank as washing water of the toilet bowl of a toilet. The bathtub water utilization apparatus as described in any one of Claim 1 thru | or 5 characterized by the above-mentioned. The said tank is installed in the ceiling back of the said toilet. The bathtub water utilization apparatus of Claim 6 characterized by the above-mentioned.

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