JP2019161618A - Warm-water supply control system - Google Patents

Abstract

To provide a warm-water supply control system of which the energy efficiency can be improved.SOLUTION: A building 10 is provided with a controller 40 controlling a warm-water supply unit 24 supplying a bathtub 20 with warm-water in a designation warm-water amount designated beforehand. Predetermined operation at a portable communication terminal 31 such as a smart phone causes warm-water supply instruction to be input from the communication terminal 31 to the controller 40 via a network. Time of resident coming home is estimated on the basis of location information on the communication terminal 31, and estimated homecoming time is calculated. Primary warm-water supply is performed and warm-water supply in a first warm-water amount into the bathtub 20 is performed by the warm-water supply unit 24 on the basis of the estimated homecoming time. A locking device 17 is unlocked on the basis of authentication of an electronic key 18 via a communication device 19 when the user comes home. Thereby, the controller 40 determines that the user comes home and secondary warm-water supply is performed and warm-water supply in a second warm-water amount is performed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hot water supply control system.

  In recent years, a home appliance remote control system has been proposed in which a user at a point away from his / her home remotely controls an electric device provided at his / her home (for example, Patent Document 1).

  In the technology, the estimated arrival time at which the user arrives at home is calculated from the position information of the vehicle driven by the user for the purpose of starting the operation of the home appliance at an appropriate activation time. Then, the activation time of each electric device is set based on the estimated arrival time. When the user returns home, the electric device is activated so that the contents set for each electric device are completed.

  In such a technique, when setting the hot water filling of the bathtub, the set temperature of the hot water in the bathtub and the start or end time of the hot water filling are set, and when the user enters the bath, Hot water is prepared.

JP2015-95721A

  However, the user may return later than the estimated arrival time due to traffic jams or troubles. In addition, the user may not take a bath immediately after returning home. In such a case, the hot water in the bathtub filled with water based on the estimated arrival time is radiated during that time and the temperature drops, so the hot water in the bathtub is controlled to be at the set temperature. . That is, the hot water in the bathtub is automatically reheated, and the hot water in the bathtub is maintained at the set temperature.

  Such a system is excellent in convenience because it can be bathed at an appropriate temperature after returning home, but it is often not performed from the viewpoint of energy efficiency (energy saving) because it is often performed repeatedly.

  Then, this invention is made | formed in view of the said situation, and it aims at providing the hot water supply control system which can improve energy efficiency suitably.

In order to solve the above problems, the hot water supply control system of the first invention is
A hot water supply control system for controlling a hot water supply section for supplying hot water to the bathtub in order to fill a bathtub with a specified amount of hot water specified in advance.
Estimated return home time set in association with the user's return home,
A first control unit that controls the hot water supply unit to supply hot water to the bathtub with a first hot water amount that is less than the designated hot water amount based on the estimated return time;
It is characterized by providing.

  According to the first invention, a hot water amount smaller than the specified hot water amount is supplied to the bathtub based on the estimated return home time. In other words, the amount of hot water (a specified amount of hot water) when actually taking a bath is divided and hot water is supplied to the bathtub. Thereby, even when hot water in the bathtub is replenished, it is more energy saving than replenishing the specified amount of hot water.

The hot water supply control system of the second invention is the first invention,
A return home grasping unit for grasping that the user has returned home;
The second control for controlling the hot water supply unit to supply the second hot water amount to the bathtub and the specified hot water amount together with the first hot water amount when the user knows that the user has returned home by the return home grasping unit. And
It is characterized by providing.

  For example, when the hot water is filled only based on the estimated return time (estimated arrival time), the actual return time is not considered. Therefore, when time is spent for some reason during the return home, the hot water filled is automatically refilled to maintain the set temperature.

  According to the second aspect of the present invention, after the user's return home is grasped, the second hot water amount is additionally supplied so that the specified hot water amount is obtained. That is, in the divided hot water filling, the hot water filling of the specified hot water amount is completed after the return of the user is detected. Thereby, since the time until the user bathes after completion of the filling of the specified amount of hot water is short, the temperature of the hot water in the bathtub is unlikely to fall below the set temperature. Therefore, the number of times of rebirth can be reduced and energy is saved.

  Moreover, the actual return home may be later than the estimated return home time, and the hot water temperature of the first hot water filled may drop. In such a case, reheating is performed in order to maintain the set temperature, but it is more energy saving to recharge the first amount of hot water than the specified amount of hot water than to recharge the specified amount of hot water.

The hot water supply control system of the third invention is the second invention,
It has a bathing grasping part to grasp that the user has taken a bath,
The first control unit adjusts the first hot water amount based on the time from when the return home is grasped by the return home grasping unit until the bathing grasping unit grasps the bathing, which is a past action history of the user. It is characterized by.

  According to the third aspect of the invention, the first hot water amount is adjusted in consideration of the time from when the user returns home until bathing. That is, in the case of a person who has a short time from going home to bathing, the amount of hot water that can be supplied to the bathtub in the time from going home to bathing is the second hot water amount. The first hot water amount is adjusted in consideration of the hot water amount. Thereby, a user can take a bath comfortably immediately after returning home.

A hot water supply control system of a fourth invention is the third invention,
The second control unit determines the hot water supply timing of the second hot water amount based on the time from when the return home is recognized by the return home grasping unit until the bathing is grasped by the bathing grasping unit, which is the user's behavior history in the past. It is characterized by adjusting.

  For people who take a long time to go back to the bath, if the second hot water is supplied immediately after returning home, the user will not take a bath even after the specified hot water is filled, It is necessary to maintain the set temperature. According to 4th invention, the timing of the hot water supply of a 2nd hot water amount is adjusted based on the time after taking a bath after taking a bath. Thereby, the filling of the specified amount of hot water can be completed at a timing close to the user bathing, so that the number of times of reheating can be reduced and energy is saved.

The hot water supply control system of the fifth invention is any one of the second to fourth inventions,
The temperature of the hot water filled in the bathtub is set as a set temperature by the user, the hot water is adjusted to the set temperature to supply hot water, and the temperature of the hot water filled in the bathtub is maintained at the set temperature. A temperature control unit for controlling the hot water supply unit,
The first amount of hot water supplied by the first control unit and filled in the bathtub is not repelled when the temperature of the hot water is equal to or higher than a predetermined temperature lower than the set temperature. Is controlled by the temperature control unit to be repulsed when the temperature is lower than a predetermined temperature,
The temperature of the second hot water supplied to the bathtub by the second control unit is such that the temperature of the hot water becomes the preset temperature when the specified hot water amount is filled in the bathtub. Controlled by a control unit.

  According to the fifth aspect of the invention, the first amount of hot water filled in the bathtub is replenished when the hot water temperature is lower than a predetermined temperature lower than the set temperature. In other words, the first hot water filled in the bathtub is not repelled when the hot water temperature is equal to or higher than the predetermined temperature. And the temperature of the hot water supplied with the second hot water amount is set to a temperature such that the hot water temperature in the bathtub becomes the set temperature when the filling of the specified hot water amount is completed. That is, the second hot water is supplied at a temperature higher than the set temperature, mixed with the first hot water having a temperature lower than the set temperature (hot water filled in the bathtub), and filled with the specified hot water. Upon completion, the set temperature hot water is filled in the bathtub. Thereby, the frequency | count of reheating with respect to the hot water of the 1st hot water amount in a bathtub can be reduced, and also it is energy saving.

Schematic which shows the structure of a hot water supply control system. The flowchart which shows a hot water filling process. The flowchart which shows a hot water filling adjustment process.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings. FIG. 1 is a schematic diagram illustrating a configuration of a hot water supply control system.

  As shown in FIG. 1, a building 10 is provided with an entrance 11, an undressing room 12, a bathroom 13, and the like as indoor spaces. And the building 10 is equipped with the controller 40 which controls the hot water supply control system of this embodiment. The controller 40 is attached to the wall of the dressing room 12, for example.

  The entrance 11 is provided with an entrance 15 as an entrance. Access to the building 10 is possible through the entrance 15. The entrance door 15 is provided with an entrance door 16 as an opening / closing body. The entrance door 16 is composed of, for example, a pivoting hinge door, and the entrance door 15 is opened and closed by the entrance door 16.

  The entrance door 16 is provided with a locking device 17 for electrically locking and unlocking the lock, and the entrance door 16 is locked or unlocked by the locking device 17. The locking device 17 is locked and unlocked by an electronic key 18 carried by a resident of the building 10. A communication device 19 is provided on the outdoor side in the vicinity of the entrance door 16 (the surface on the outdoor side of the entrance door 16 is also acceptable). The communication device 19 transmits a request signal to form a communication area for wireless communication (not shown). The controller 40 is connected to the locking device 17 and the communication device 19.

  The electronic key 18 includes a memory (not shown) that stores unique ID information for each electronic key 18. When the electronic key 18 enters the communication area of the communication device 19 and receives a request signal, the electronic key 18 transmits ID information to the communication device 19 in response to the request signal. When the ID information from the electronic key 18 is input via the communication device 19, the controller 40 determines whether the ID information matches the ID information registered in advance, and determines whether or not the electronic key 18 is a legitimate electronic key 18. Authenticate.

  When the electronic key 18 is properly authenticated by the ID information, the controller 40 locks or unlocks the locking device 17. The locking device 17 has a thumb turn portion (not shown) that can be locked and unlocked from the indoor side (entrance 11 side). In this embodiment, when locking / unlocking the locking device 17 from the indoor side, it is locked / unlocked by operating this thumb turn part.

  The dressing room 12 is a room in which a resident enters before entering the bathroom 13, and can enter and leave the bathroom 13 from the dressing room 12 by opening and closing a bathroom door (not shown), for example. The undressing room 12 is provided with a human sensor 32 that detects a person, and detects that a person has entered the undressing room 12. The human sensor 32 is connected to the controller 40, and a detection signal from the human sensor 32 is output to the controller 40.

  A bathtub 20 is installed in the bathroom 13. A water supply port 21 is provided on the side wall of the bathtub 20, and a circulation adapter 22 is attached to the water supply port 21. A water supply pipe 23 is connected to the water supply port 21.

  The water supply pipe 23 is connected to a water heater 24 installed outdoors, and hot water generated by the water heater 24 can be supplied to the bathtub 20 through the water supply pipe 23. The water heater 24 is connected to the controller 40, and the supply of hot water to the bathtub 20 is controlled by the controller 40.

  A water supply device 25 including a water supply valve that opens and closes the water supply pipe 23 is provided in the middle of the water supply pipe 23. The water supply device 25 is connected to the controller 40, and opens and closes the water supply valve in accordance with a control signal from the controller 40.

  A pipe 26 is connected to the water supply port 21 as a circulation path for reheating. The pipe 26 is provided with a water level sensor 27 such as a semiconductor pressure sensor for detecting the water level of the bathtub 20, a circulation pump 28 for circulating hot water in the bathtub 20, and a heat exchanger 29. When the water supply valve provided in the water supply device 25 is closed, a recirculation path for additional cooking that forms a closed circuit is formed by the pipe 26, the bathtub 20, and the water supply pipe 23. The reheating operation is performed by driving the circulation pump 28 so that the hot water in the bathtub 20 is sent to the heat exchanger 29 and heated and then returned to the bathtub 20.

  A temperature sensor 30 for measuring the hot water temperature in the bathtub 20 is attached to the water supply port 21.

  The water level sensor 27 and the temperature sensor 30 are connected to the controller 40, and the results detected by the sensors 27 and 30 are output to the controller 40. The controller 40 fills the bathtub 20 with the specified amount of hot water based on the water level detected from the water level sensor 27, and reaches the specified temperature based on the temperature detected from the temperature sensor 30. Thus, the temperature of the hot water in the bathtub 20 is controlled.

  The circulation pump 28 and the heat exchanger 29 are connected to the controller 40 and operate according to a control signal from the controller 40.

  A communication unit 44 is connected to the controller 40, and the controller 40 can be connected to the network N by the communication unit 44. A portable communication terminal 31 such as a smartphone can be connected to the network N. The communication terminal 31 has a GPS terminal, and the GPS terminal is configured to generate position information of itself (communication terminal 31) by receiving radio waves transmitted from GPS satellites. When a predetermined operation is performed at the communication terminal 31, a hot water filling request is input from the communication terminal 31 to the controller 40 via the network N. Thereby, hot water filling operation from a remote place is possible.

  Next, the electrical configuration of this system will be described.

  The controller 40 includes a known microcomputer that includes a CPU, ROM, RAM, and the like. The controller 40 includes at least a control unit 41 that controls locking / unlocking and control of the water heater 24, and a storage unit 42 that stores information related to hot water supply, ID information for electronic key authentication, detection results from various sensors, and the like. And a timer 43 used for measuring time.

  The control unit 41 controls the water heater 24 so as to fill the bathtub 20 with a set temperature and a specified amount of hot water preset by a resident. And the hot water filled in the bathtub 20 is temperature-controlled so that it may be maintained at preset temperature based on the temperature detected from the temperature sensor 30. That is, when the temperature of the hot water filled in the bathtub 20 becomes lower than the set temperature, the reheating is performed.

  In the storage unit 42, a reception time of a hot water filling request, a return home estimated time, a return home time, a bathing start time, a holding time, and the like are recorded as needed.

  Next, the hot water filling process executed by the controller 40 will be described with reference to the flowchart of FIG.

  In this embodiment, the hot water filling to the bathtub 20 is divided and performed. Hereinafter, supplying the first hot water amount to the bathtub 20 is referred to as “primary hot water filling”, and the instruction for filling the primary hot water is referred to as “primary hot water filling instruction”, and supplying the second hot water amount to the bathtub 20 is referred to as “ An instruction for secondary hot water filling is referred to as “secondary hot water filling instruction”.

  In FIG. 2, in step S11, it is determined whether a hot water filling request has been received. If a hot water filling request has been received, a YES determination is made and processing proceeds to step S12. If a hot water filling request has not been received, a NO determination is made and the present process is terminated.

  In step S12, the location information of the communication terminal 31 that has transmitted the hot water filling request is acquired. In subsequent step S13, the estimated return time of the resident is calculated from the obtained position information.

  In the next step S14, the primary hot water filling is started in time with the estimated return home time. Specifically, a preset amount of hot water is supplied to the bathtub 20 so that the primary hot water filling is completed at the estimated time of returning home (primary hot water filling instruction). When it is determined that the first amount of hot water is filled based on the detection by the water level sensor 27, the first hot water filling is terminated. The setting of the first hot water amount will be described with reference to the flowchart of FIG.

  In continuing step S15, it is determined whether the resident came home. Specifically, it is determined whether or not the resident has come home by determining whether or not the locking device 17 has been unlocked based on the authentication of the electronic key 18. If unlocking of the locking device 17 by the authentication of the electronic key 18 is detected, it is determined that the resident has returned home, and the process proceeds to step S18. If unlocking of the locking device 17 by the authentication of the electronic key 18 is not detected, the resident is determined not to return home and proceeds to step S16. When the unlocking of the locking device 17 by the authentication of the electronic key 18 is detected, the time is recorded in the storage unit 42 as “home time”.

  In step S16, it is determined whether or not the hot water temperature filled with the primary hot water is lower than a predetermined temperature (in other words, “threshold”). Here, the predetermined temperature is set as a temperature lower than the set temperature by a predetermined value (for example, 2 to 3 ° C.). When the hot water temperature filled with the primary hot water is equal to or higher than the predetermined temperature, NO is determined and the process returns to step S15 to repeat each process. If the hot water temperature filled with the primary hot water is lower than the predetermined temperature, the determination is YES and the process proceeds to step S17.

  In the subsequent step S17, chasing is performed on the hot water filled. The hot water filled in the bathtub 20 can maintain the set temperature set by the resident by chasing, but in the present embodiment, the hot water temperature is different from the hot water filled with the first hot water amount. When the temperature is lower than the predetermined temperature, retreat is performed. After starting the chasing, the process returns to step S15 to repeat each process. The chasing is carried out until the set temperature is reached, and then ends automatically.

  If it is determined in step S15 that the resident has come home, the process proceeds to step S18 to determine whether the holding time is 10 minutes or longer. The holding time is the time from when the resident returns home to take a bath. Specifically, the hold time is detected by the human sensor 32 from the time when the locking device 17 is unlocked by the authentication of the electronic key 18. Time to time. The holding time is calculated by collecting related data after bathing is detected, and will be described with reference to the flowchart of FIG. 3 described later. If the holding time is 10 minutes or more, a YES determination is made and processing proceeds to step S19. If the holding time is less than 10 minutes, the determination is NO and the process proceeds to step S20.

  In step S19, the timer 43 measures the time and waits for 10 minutes before the holding time elapses. Here, it was decided to wait for 10 minutes before the holding time elapses, because if the secondary hot water filling is executed too early, the hot water temperature will drop after the set hot water amount is reached, so bathing as much as possible This is so that the hot water filling is completed immediately before. Then, it progresses to step S20.

  In step S <b> 20, the temperature of the second hot water to be supplied to the bathtub 20 is determined based on the temperature of the hot water in the bathtub 20 detected by the temperature sensor 30. That is, in step S20, based on the temperature of the first hot water in the bathtub 20, when the designated hot water is filled in the bathtub 20, the second hot water in the bathtub 20 becomes the set temperature. Control the temperature of hot water. Therefore, even if the hot water filled in the first hot water in the bathtub 20 has a temperature lower than the set temperature (however, higher than a predetermined temperature) (NO determination in step S16), it is designated by the step S20. When the hot water filling is completed, hot water at a set temperature can be prepared in the bathtub 20.

  In step S21, secondary hot water filling is started, and after the hot water filling is completed, the present process is terminated.

  Next, the hot water filling adjustment process executed by the controller 40 will be described with reference to the flowchart of FIG. The hot water filling adjustment processing is processing for adjusting the first hot water amount and the timing of the secondary hot water filling for the hot water filling after the next time. Thereby, it is possible to provide hot water filling at a more appropriate timing corresponding to the life rhythm of the resident while saving energy.

  In FIG. 3, in step S <b> 31, it is determined whether a person is detected by the human sensor 32 provided in the dressing room 12. If a person is detected, a YES determination is made and processing proceeds to step S32. If no person is detected, the determination is NO and this process is terminated.

  In step S32, it is determined whether or not the primary hot water filling has been performed within 3 hours before the person's detection. Specifically, the latest estimated time of returning home recorded in the storage unit 42 (in other words, “corresponding to“ primary hot water filling completion time ”) is referred to. If the primary hot water is filled within 3 hours, YES is determined and the process proceeds to step S33. If the primary hot water filling is not performed within 3 hours, NO is determined and the present process is terminated. In the case of YES determination in step S32, the time detected by the human sensor 32 is measured by the timer 43 and recorded in the storage unit 42 as “bathing start time”.

  The resident makes a hot water filling request after knowing that the hot water filling will be performed in accordance with his estimated time to go home. Therefore, it is considered that there is some special reason when taking a bath after the estimated return home time exceeds 3 hours. Therefore, in this embodiment, as data for reflecting in the next hot water filling, the hot water filling with the primary hot water filling within 3 hours before the bathing start time is targeted. In addition, even when entering the dressing room 12 and being detected by the human sensor 32 regardless of bathing (for example, bathroom cleaning), it can be excluded due to the relationship with the primary hot water filling.

  In step S33, it is determined whether a return home is detected after a hot water filling request. Specifically, the storage unit 42 is referred to, and it is determined whether or not the return time when the locking device 17 is unlocked by the authentication of the electronic key 18 is recorded after the latest hot water filling request. When the return time is recorded, it is determined that the resident has come home after the hot water filling request. If the return home is detected after the hot water filling request, the determination is YES and the process proceeds to step S34. If the return home is not detected after the hot water filling request, the determination is NO and this process is terminated.

  In step S34, the holding time is calculated. The holding time is the time from when the resident returns home to take a bath (that is, the time from the return home time to the bath start time). Therefore, the holding time relating to the bathing is calculated from the return time recorded in the storage unit 42 and the bathing start time. The calculated hold time is recorded in the storage unit 42.

  In subsequent step S35, an average holding time is calculated based on the holding time recorded in the storage unit 42 (for example, an average holding time of one month). In step S36, the calculated average holding time is recorded in the storage unit. The average holding time is used as the holding time for the next hot water filling.

  Here, if you have a long time to take a bath after returning home (that is, if you have a long holding time), if you supply the second hot water immediately after you get home, the filling of the specified hot water will be completed. However, the resident does not take a bath, and after that, it is necessary to maintain the hot water temperature at a preset temperature by chasing. Therefore, in order to grasp the life rhythm of the resident, the hold time (average) is calculated in step S35, and when the hold time is 10 minutes or more, the return detection is made until 10 minutes before the time corresponding to the hold time elapses. It waits for the subsequent secondary hot water filling (see step S19 in FIG. 2). Thereby, the timing of the hot water supply of the 2nd hot water quantity can be controlled based on the time from taking a bath to bathing. Therefore, the filling of the designated hot water can be completed at a timing close to the resident's bathing, and the number of reheating can be reduced, thus saving energy.

  In step S37, it is determined whether there is a change in the first hot water amount. Whether or not there is a change in the first hot water amount is determined based on the calculated average holding time.

  For example, in the case of a person who has a short holding time (that is, a person who takes a short time from going home to bathing), the amount of hot water that can be supplied to the bathtub 20 in the time from going home to bathing is the second hot water amount. Become. Therefore, it is necessary to control the first hot water amount in consideration of the second hot water amount. Specifically, in the case of a person with a holding time of 5 minutes, if the hot water supply flow rate to the bathtub 20 is 10 L / min, the amount of hot water that can be used as the secondary hot water filling is 50 L. Therefore, the amount of hot water obtained by subtracting 50 L from the specified amount of hot water is the first amount of hot water.

  That is, when the holding time is short, the first hot water amount is adjusted to be larger than when the holding time is long. The upper limit of the second hot water amount is set by the holding time and the hot water supply flow rate per unit time to the bathtub 20. Then, the second hot water amount is set so as not to exceed the upper limit of the second hot water amount, and the first hot water amount is determined by an amount obtained by subtracting the second hot water amount from the set hot water amount. As a result, it is possible to comfortably bathe immediately after returning home, even for a resident of a lifestyle rhythm who takes a bath immediately after returning home.

  In step S37, as described above, based on the holding time, it is determined whether or not the first hot water amount needs to be changed. If the change is necessary, YES is determined and the process proceeds to step S38. If no change is necessary, the determination is NO and the process is terminated.

  In step S38, the first amount of hot water is calculated based on the holding time, and the calculated first amount of hot water is recorded in the storage unit 42. The newly calculated first hot water amount is adopted as the first hot water amount at the next hot water filling. This process is complete | finished after the change of a 1st hot water amount.

  As mentioned above, according to the structure of this embodiment explained in full detail, the following outstanding effects are acquired.

  According to this embodiment, the hot water filling to the bathtub 20 is divided and implemented. First, a hot water amount (first hot water amount) smaller than the specified hot water amount is supplied to the bathtub 20 based on the estimated return home time. In other words, the hot water amount (designated hot water amount) when actually taking a bath is divided and hot water is supplied to the bathtub 20. Thereby, even when the hot water in the bathtub 20 is reheated, it is more energy saving than reheating the specified amount of hot water.

  For example, when the hot water filling is performed only based on the estimated return time, the actual return time is not considered. Therefore, when time is spent for some reason during the return home, the hot water filled is automatically refilled to maintain the set temperature.

  According to this embodiment, after the resident's return home is grasped, the second hot water amount is additionally supplied so that the designated hot water amount is obtained. That is, in the divided hot water filling, the hot water filling is completed after the return of the resident is detected. Thereby, since the time until a resident takes a bath after completion of hot water filling is short, the temperature of the hot water in the bathtub 20 is unlikely to fall below the set temperature. Therefore, the number of times of rebirth can be reduced and energy is saved.

  Moreover, the actual return home may be later than the estimated return home time, and the hot water temperature of the first hot water filled may drop. In such a case, reheating is performed in order to maintain the set temperature, but it is more energy saving to recharge the first amount of hot water than the specified amount of hot water than to recharge the specified amount of hot water.

  According to the present embodiment, the first hot water amount is adjusted in consideration of the time from when the resident returns home to bathing. In other words, in the case of a person who takes a short time from going home to bathing, the amount of hot water that can be supplied to the bathtub 20 in the time from going home to bathing is the second hot water amount. The first hot water amount is controlled. Thereby, a resident can take a bath comfortably immediately after returning home.

  For people who take a long time to go to bath after returning home, if the second amount of hot water is supplied immediately after returning home, the resident will not take a bath even if the hot water filling is completed, and the hot water temperature will be set to the set temperature by chasing Need to be maintained. According to this embodiment, the timing of hot water supply of the second hot water amount is adjusted based on the time (holding time) from returning home to bathing. Thereby, the hot water filling can be completed at a timing close to the resident's bathing, so that the number of retreats can be reduced and energy is saved.

  According to the present embodiment, the first hot water filled in the bathtub 20 is replenished when the hot water temperature is lower than a predetermined temperature. In other words, when the first amount of hot water filled in the bathtub 20 is equal to or higher than the predetermined temperature, it is not retreated. And the temperature of the hot water supplied with the second hot water amount is set to such a temperature that the hot water temperature in the bathtub 20 becomes the set temperature when the filling of the specified hot water amount is completed. That is, the second hot water is supplied at a temperature higher than the set temperature and mixed with the first hot water at a temperature lower than the set temperature. It is filled with hot water.

  For example, in the case of a circulation type reheating system in which hot water in the bathtub 20 passes through a heat exchange pipe and is reheated by heat exchange, it is more energy efficient to make hot water than reheating. There is also. Therefore, according to this embodiment, the frequency | count of reheating with respect to the hot water of the 1st amount of hot water in the bathtub 20 can be reduced, and it is energy saving.

  The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

  (1) In the above embodiment, the hot water filling request is transmitted by the operation of the communication terminal 31, and the estimated return home time is calculated based on the location information of the communication terminal 31, but the estimated return home time is set in advance, The primary hot water filling may be performed based on the set estimated time of returning home. In this case, the resident does not need to make a hot water filling request, but, for example, when it is determined that he / she will return home in a time zone different from the set estimated return home time, the set return home estimated time is used as the communication terminal. You may change by operation of 31.

  (2) In the above embodiment, the hot water filling instruction and the position information are acquired by the communication terminal 31 such as a smartphone. However, the present invention is not limited to this, and for example, a car navigation device provided in a vehicle owned by a resident May be used. In this case, a switch or the like for transmitting a hot water filling instruction may be provided in the car navigation device. The position information when the hot water filling instruction is given can be acquired by a GPS terminal provided in the car navigation device. The hot water filling instruction and the acquired position information can be transmitted to the controller 40 via a communication unit mounted on the car navigation device.

  (3) In the above embodiment, based on the time from when the resident returns home to bathing (holding time), for residents whose holding time is 10 minutes or more, 10 minutes before the holding time elapses after returning home However, the timing of starting the secondary hot water filling is not limited to this. The timing of secondary hot water filling may be appropriately adjusted according to the holding time, the amount of second hot water, and the like.

  For example, the timing of starting the secondary hot water filling may be performed immediately after returning home detection regardless of the holding time, may be 5 minutes before or 15 minutes before the holding time elapses, When a person is detected by the human sensor 32 provided in the dressing room 12, secondary hot water filling may be started. An operation panel of the hot water supply control system may be provided on the wall surface in the bathroom 13, and the secondary hot water filling may be started by a resident who has entered the bathroom 13 for bathing operating the operation unit of the operation panel. Alternatively, a dressing basket having a weighing function may be provided in the dressing room 12, and secondary hot water filling may be started when the weight of the dressing basket has increased by a predetermined weight or more. A facility capable of detecting that a bath towel is arranged may be provided, and secondary hot water filling may be started based on the detection.

  (4) When the water heater 24 is an electric water heater, the reheating may be performed by exchanging heat between hot water preheated by the electric water heater and hot water refluxed from the bathtub 20.

  DESCRIPTION OF SYMBOLS 10 ... Building, 11 ... Entrance part, 13 ... Bathroom, 15 ... Entrance door, 16 ... Entrance door, 17 ... Locking device, 18 ... Electronic key, 19 ... Communication device, 20 ... Bathtub, 24 ... Water heater, 31 ... Communication Terminal, 40 ... Controller, 41 ... Control unit, 42 ... Storage unit, 43 ... Timer, 44 ... Communication unit, N ... Network.

Claims (5)

A hot water supply control system for controlling a hot water supply section for supplying hot water to the bathtub in order to fill a bathtub with a specified amount of hot water specified in advance.
Estimated return home time set in association with the user's return home,
A first control unit that controls the hot water supply unit to supply hot water to the bathtub with a first hot water amount that is less than the designated hot water amount based on the estimated return time;
A hot water supply control system comprising: A return home grasping unit for grasping that the user has returned home;
The second control for controlling the hot water supply unit to supply the second hot water amount to the bathtub and the specified hot water amount together with the first hot water amount when the user knows that the user has returned home by the return home grasping unit. And
The hot water supply control system according to claim 1, comprising: It has a bathing grasping part to grasp that the user has taken a bath,
The first control unit adjusts the first hot water amount based on the time from when the return home is grasped by the return home grasping unit until the bathing grasping unit grasps the bathing, which is a past action history of the user. The hot water supply control system according to claim 2, wherein   The second control unit determines the hot water supply timing of the second hot water amount based on the time from when the return home is recognized by the return home grasping unit until the bathing is grasped by the bathing grasping unit, which is the user's behavior history in the past. The hot water supply control system according to claim 3, wherein adjustment is performed. The temperature of the hot water filled in the bathtub is set as a set temperature by the user, the hot water is adjusted to the set temperature to supply hot water, and the temperature of the hot water filled in the bathtub is maintained at the set temperature. A temperature control unit for controlling the hot water supply unit,
The first amount of hot water supplied by the first control unit and filled in the bathtub is not repelled when the temperature of the hot water is equal to or higher than a predetermined temperature lower than the set temperature. Is controlled by the temperature control unit to be repulsed when the temperature is lower than a predetermined temperature,
The temperature of the second hot water supplied to the bathtub by the second control unit is such that the temperature of the hot water becomes the preset temperature when the specified hot water amount is filled in the bathtub. The hot water supply control system according to any one of claims 2 to 4, which is controlled by a control unit.

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