JP2019100635A - Water heater - Google Patents

Abstract

To provide a water heater which is advantageous in preventing or solving occurrence of abnormality caused by a connection port being clogged where bathtub water flows in/out between a circulation circuit for circulating the bathtub water and a bathtub during a re-heating operation.SOLUTION: In the case where time required for a bath return temperature from the start of a re-heating operation reaches a target temperature is shorter than reference time, control means for controlling a re-heating operation finishes the re-heating operation temporarily, and also notifies attention information which is information calling for attention as to whether or not the connection port where bathtub water flows in/out between a circulation circuit and a bathtub is clogged by information notification means, and then, resumes the re-heating operation.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a water heater.

  BACKGROUND OF THE INVENTION A hot water supply device having a function of driving a bathtub by using a bathtub water heating means such as a bath heat exchanger for heating bathtub water led from a bathtub is widely used. Generally, in such a hot water supply apparatus, the temperature of the bath water on the inlet side of the bath water heating means is detected during the reheating operation, and the reheating operation is stopped when the temperature becomes higher than the target temperature. And

  A bathtub adapter, for example, is installed on the inner wall of the bathtub as a connection port through which bathtub water flows in and out between the circulation circuit connected to the bathtub water heating means and the inside of the bathtub. When the bather is closing the connection port with his or her feet, even though the temperature in the entire bath is not sufficiently raised, some of the bath water in the bath is circulated in the circulation circuit. The reheating operation may be stopped when the temperature of the drawn-in and heated bath water is detected on the inlet side of the bath water heating means.

  Patent Document 1 discloses a technology in which only the bath water is circulated after stopping the reheating operation, and when the bath water temperature lower than the specified value is detected during that time, the reheating operation is performed again. .

Unexamined-Japanese-Patent No. 2015-210003

  According to the technique of Patent Document 1, even if the re-driving operation is performed again, for example, if the bather keeps closing the connection port with the foot or back, the re-driving operation can not be normally performed, and the re-driving operation is performed. It may take a long time to complete the operation.

  The present invention has been made to solve the problems as described above, and during reheating operation, a connection port through which bathtub water flows in and out between a circulation circuit for circulating bathtub water and the inside of the bathtub is blocked. It is an object of the present invention to provide a hot water supply device that is advantageous for preventing or eliminating the occurrence of an abnormality caused by the

  A hot water supply apparatus according to the present invention comprises a bath water heating means capable of heating bath water circulating from a bath through a circulation circuit having a bath circulation pump, and a bath return which is the temperature of bath water on the inlet side of the bath water heating means. The control means comprises temperature control means for detecting temperature, control means for controlling reheating operation for operating the bath circulation means and bath water heating means, and information notification means for notifying the user of information. If the time taken for the temperature to return to the target temperature after the start of the reheating operation is shorter than the reference time, the reheating operation is once ended, and between the circulation circuit and the inside of the bathtub Alerting information, which is information that calls attention to whether or not the connection port through which bathtub water flows in and out is blocked, is reported by the information notification means, and then reheating operation is started again

  According to the present invention, it is possible to prevent or eliminate the occurrence of an abnormality caused by blocking of a connection port through which bathtub water flows in and out between a circulation circuit for circulating bathtub water and the inside of the bathtub during reheating operation. It is possible to provide a particularly advantageous water heater.

FIG. 1 is a diagram showing a hot water supply apparatus according to a first embodiment. 5 is a flowchart showing an example of control at the time of reheating operation in Embodiment 1. FIG. FIG. 7 is a diagram showing a display example of display means of the bathroom remote control according to the first embodiment. It is a figure which shows the example which displayed alerting information on the display means of a bathroom remote control. It is a figure which shows the example which displayed alerting information on the display means of a bathroom remote control.

  Hereinafter, embodiments will be described with reference to the drawings. The same or corresponding elements in the drawings are denoted by the same reference numerals, and redundant description will be simplified or omitted.

Embodiment 1
FIG. 1 is a diagram showing a hot water supply apparatus 1 according to a first embodiment. As shown in FIG. 1, the hot water supply device 1 of the present embodiment corresponds to a hot water storage type hot water supply device provided with a hot water storage tank 2. In addition to the hot water storage tank 2, the tank unit 15 provided in the hot water supply apparatus 1 includes a heat source fluid circulation circuit 3, a heat source side pump 4, a bath circulation pump 6, a bath heat exchanger 7, a bath return temperature detection means 8, and a gobo temperature detection Means 9 and a control unit 10 are incorporated. The tank unit 15 is connected to the bathtub 20 in the bathroom via the bathtub water circulation circuit 5.

  The hot water storage tank 2 stores high temperature water used as a heat source fluid in a reheating operation for heating the bathtub 20. The heat source fluid circulation circuit 3 includes a first passage 3a connecting the upper portion of the hot water storage tank 2 and the heat source fluid inlet of the heat exchanger 7 for bath, the heat source fluid outlet of the heat exchanger 7 for bath and the lower portion of the hot water tank 2 And a second passage 3b connecting the two. A heat source side pump 4 for sending a heat source fluid is disposed in the middle of the second passage 3b. The heat source side pump 4 may be disposed in the first passage 3 a instead of the illustrated configuration. By driving the heat source side pump 4, the heat source fluid circulation circuit 3 can circulate the hot water to be the heat source fluid to the heat exchanger 7 for the bath.

  The bathtub adapter 21 is attached to the inner wall of the bathtub 20. The bathtub adapter 21 in the present embodiment corresponds to a connection port through which bathtub water flows in and out between the bathtub water circulation circuit 5 and the inside of the bathtub 20. The bathtub adapter 21 is provided with two connection ports. The bathtub water circulation circuit 5 has a first passage 5a connecting one of the connection ports of the bathtub adapter 21 and the bathtub water inlet of the heat exchanger 7 for bath, the other connection port of the bathtub adapter 21 and the heat exchanger 7 for bath. And a second passage 5b for connecting with the bathtub water outlet. A tub circulation pump 6 for feeding bath water is disposed in the middle of the first passage 5a. The bath circulation pump 6 may be disposed in the second passage 5b instead of the illustrated configuration. When the bath circulation pump 6 is driven, bath water circulates in the bath water circulation circuit 5 as follows. The bathtub water in the bathtub 20 is drawn into the first passage 5 a from the bathtub adapter 21 and flows into the heat exchanger 7 for bath. The bath water having passed through the bottom heat exchanger 7 flows from the bath adapter 21 into the bath 20 through the second passage 5 b.

  In the first passage 5a, there is provided a return temperature detecting means 8 for detecting a return temperature which is the temperature of bath water on the inlet side of the bottom heat exchanger 7. The second passage 5b is provided with a go-to-out temperature detection means 9 for detecting a go-to-out temperature that is the temperature of the bath water at the outlet side of the bottom heat exchanger 7.

  The control unit 10 includes, for example, a microcomputer and the like, and a storage unit including a ROM, a RAM, a non-volatile memory, etc., an arithmetic processing unit (CPU) that executes arithmetic processing by a program stored in the storage unit, and arithmetic processing The control means comprises an input / output port for inputting / outputting an external signal to / from the apparatus, and a timer function for measuring an operation time. The control unit 10 is electrically connected to the various actuators including the heat source side pump 4 and the bath circulation pump 6 described above and the various sensors including the bath return temperature detection means 8 and the gobo temperature detection means 9. . Control unit 10 controls the operation of water heating apparatus 1.

  The control unit 10 can communicate bidirectionally with the bathroom remote controller 11 and the kitchen remote controller 12 by wired communication or wireless communication. The control unit 10 and the bathroom remote control 11 and the kitchen remote control 12 may be able to communicate via a network. The bathroom remote control 11 is installed in the bathroom. The kitchen remote control 12 is installed in the kitchen. The kitchen remote control 12 is an example of a remote control provided at a place other than a bathroom. Instead of the kitchen remote control 12, for example, a remote control installed in a living room may be provided as a remote control installed in a place other than a bathroom.

  The bathroom remote control 11 and the kitchen remote control 12 are examples of user interfaces. In addition to the bathroom remote control 11 and the kitchen remote control 12, or in place of the bathroom remote control 11 and the kitchen remote control 12, for example, a portable information terminal such as a smartphone may be configured to have a function as a user interface.

  The bathroom remote control 11 includes a display unit 11a for displaying information, an operation unit having a button switch operated by a user, and a voice guidance unit 11b capable of outputting voice guidance from a speaker. The display unit 11a has a configuration including, for example, a liquid crystal display device, an organic EL (Electro-Luminescence) display device, and the like, and can display information such as the state of the hot water supply device 1, the bathtub temperature, and the hot water supply temperature. The display means 11a and the voice guidance means 11b correspond to information notification means for notifying the user in the bathroom of the information.

  The kitchen remote controller 12 includes a display unit 12a for displaying information, an operation unit having a button switch operated by a user, and a voice guidance unit 12b capable of outputting voice guidance from a speaker. The display unit 12a has, for example, a configuration including a liquid crystal display device, an organic EL display device, and the like, and can display information such as the state of the hot water supply device 1, the bathtub temperature, and the hot water supply temperature. The display means 12a and the voice guidance means 12b correspond to the notification means outside the bathroom provided at a place other than the bathroom.

  The user can remotely operate the hot water supply device 1 by operating the bathroom remote control 11 or the kitchen remote control 12, and can input various instructions including the refueling operation of the bathtub 20 and perform various settings. It is.

  The hot water supply device 1 includes a heating device (not shown) that heats the water of the hot water storage tank 2. The water heated by the heating device is stored in the hot water storage tank 2. The heating device may have any configuration, for example, a heat pump type heating device, a combustion type heating device heated by combustion of fuel, an electric heater, and the like.

  The hot-water supply device 1 is provided with a pouring means (not shown) that performs a pouring operation in which the hot water is stored in the bathtub 20 by injecting the hot water into the bathtub 20. The hot water filling means includes a mixing valve for adjusting the hot water supply temperature by mixing, for example, high temperature water supplied from the hot water storage tank 2 and low temperature water supplied from a water source such as tap water, and flows out from the mixing valve Hot water is configured to be injected into the bathtub 20 through the bathtub water circulation circuit 5. During the pouring operation, when the integrated flow rate detected by the flow rate sensor (not shown) for detecting the flow rate of hot water supplied to the bathtub 20 reaches the amount of pouring water set by the user, the control unit 10 It is controllable to stop the hot water supply.

  The control unit 10 controls the reheating operation for raising the temperature of the bathtub water in the bathtub 20. In reheating operation, it becomes as follows. The heat source side pump 4 and the bath circulation pump 6 are operated. The high temperature water from the upper part of the hot water storage tank 2 is supplied as a heat source fluid to the heat exchanger 7 for bath through the first passage 3a. In the bath heat exchanger 7, when the heat source fluid and the bath water introduced from the bath 20 through the first passage 5a exchange heat, the bath water is heated and the heat source fluid is cooled. The heated bath water returns into the bath 20 through the second passage 5b. The cooled heat source fluid flows into the lower part of the hot water storage tank 2 through the second passage 3b.

  The bath heat exchanger 7 in the present embodiment corresponds to bath water heating means capable of heating bath water circulating from the bath 20. The bath water heating means in the present invention may be constituted by, for example, a combustion type heating device or an electric heater or the like which heats by burning the fuel instead of the heat exchanger 7 for bath. The present invention is also applicable to a water heater that does not have the hot water storage tank 2.

  FIG. 2 is a flow chart showing an example of control at the time of reheating operation in the first embodiment. Hereinafter, the reheating operation in the first embodiment will be further described with reference to FIG.

  The user can instruct reheating of the bathtub 20 by operating the bathroom remote control 11, for example. When the control unit 10 receives an instruction to retrench the bathtub 20 from the bathroom remote control 11, as step S1 in FIG. 2, the control unit 10 first starts driving the bath circulation pump 6, and causes the bathtub water circulation circuit 5 to circulate bathtub water. The bathtub water in the bathtub 20 is fed back to the position of the temperature detection means 8. Next, at step S2, the control unit 10 measures the temperature of the bath water by means of the return temperature detection means 8. The temperature measured at this time corresponds to the temperature of the bath water in the bathtub 20 at the start of the refueling operation, and is hereinafter referred to as "the temperature before reheating."

  Next, in step S3, the control unit 10 calculates the reheating appropriate time based on the pre-reheating temperature, the target bathtub temperature, and the amount of bathtub water in the bathtub 20. The reheating appropriate time corresponds to the reference time considered to be the minimum required from the start to the completion of reheating operation. The target bathtub temperature is, for example, a temperature set by the user using the bathroom remote control 11. For example, the control unit 10 may regard the amount of hot water set by the user as the amount of bathtub water in the bathtub 20. Alternatively, the control unit 10 may detect the amount of bathtub water in the bathtub 20 based on a signal of a water level sensor (not shown) that detects the water level in the bathtub 20.

  Next, in step S4, the control unit 10 starts driving the heat source side pump 4 and circulates the heat source fluid to the heat source fluid circulation circuit 3. Thereby, heat exchange between the heat source fluid and the bath water in the bath heat exchanger 7 is started. In the present disclosure, “start of reheating operation” means the time when heating of bath water is started in the bath heat exchanger 7, that is, the state where both the heat source side pump 4 and the bath circulation pump 6 are operated is started. It indicates the point in time that has occurred and corresponds to the point in time of step S4.

  FIG. 3 is a view showing a display example of the display means 11 a of the bathroom remote control 11 in the first embodiment. The display unit 11a has a guidance display unit 30 capable of displaying words or sentences. During the rerun operation, as shown in FIG. 3, the guidance display unit 30 may display, for example, the words “replay”. As a result, it is possible to notify the user that reheating operation is being performed. In the following description, a user in a bath may be called a "bather".

  Note that, in the calculation of the reheating appropriate time in step S3, the control unit 10 may perform as follows. The control unit 10 calculates the reheating appropriate time to be longer as the temperature difference between the target bathtub temperature and the pre-reheating temperature is larger. The control unit 10 calculates the reheating appropriate time to be longer as the amount of bathtub water in the bathtub 20 is larger. The time which is considered to be necessary from the start of the reheating operation to the completion is simply calculated as the heat capacity of the bath water in the bath 20 multiplied by the above temperature difference, the heating capacity by the bottom heat exchanger 7 (unit Is the time divided by watt). In consideration of the error due to the disturbance, the control unit 10 may calculate the recurrent appropriate time so as to be shorter than the time calculated simply. The heating capacity by the bottom heat exchanger 7 is, for example, based on the temperature of the heat source fluid flowing from the hot water storage tank 2 into the bottom heat exchanger 7, the heat exchange efficiency of the bottom heat exchanger 7, the flow rate of the heat source fluid, etc. The control unit 10 can calculate. In addition, the control unit 10 may use a predetermined value stored in advance as the value of the heating capacity of the boil heat exchanger 7. As an example, when the temperature before reheating is 40 ° C., the target bathtub temperature is 42 ° C., the amount of bathtub water in the bathtub 20 is 200 L, and the temperature of the heat source fluid flowing into the heat exchanger 7 for bath is 85 ° C. When it is calculated that the time for raising the temperature of 200 L of bath water from 40 ° C. to 42 ° C. is 10 minutes or more, even if there is no natural heat radiation etc. May be calculated as a reheating reasonable time, a value less than 10 minutes, such as 5 minutes.

  The order of step S3 and step S4 may be reversed to the above. That is, after starting the driving of the heat source side pump 4, the control unit 10 may calculate the reheating appropriate time. In the case of the present embodiment, by calculating the reheating appropriate time based on the pre-reheating temperature, the target bathtub temperature, and the amount of bathtub water in the bathtub 20, the reheating appropriate time is more appropriately extended. Can be set to As a modification, the control unit 10 may use a value stored in advance as the reaping reasonable time, instead of calculating the reheating reasonable time each time.

  During execution of the reheating operation, at step S5, the control unit 10 measures the backflush temperature by the backfed temperature detection means 8. Next, in step S6, the control unit 10 compares the measured boil-over temperature with the target bathtub temperature. As a result, in the case where the return temperature is lower than the target bathtub temperature, the control unit 10 continues the refueling operation, and performs the process after step S5 again. On the other hand, when the backflow temperature becomes equal to or higher than the target bathtub temperature in step S6, the control unit 10 stops the heat source side pump 4 as step S7 and stops the bath circulation pump 6 as step S8. End the reheating operation.

  Next, at step S9, the control unit 10 calculates the current refueling operation time. The refueling operation time is the time taken for the return temperature to reach the target bathtub temperature after the start of the refueling operation this time. For example, the control unit 10 may calculate the time from the start of the refueling operation in step S4 to the end of the refueling operation by the processes in steps S7 and S8 as the refueling operation time.

  Next, at step S10, the control unit 10 reheats the reheating operation time calculated at step S9 and compares the reheating operation time with the appropriate time. As a result, if the refueling operation time is more than reheating time (for example, 15 minutes for reheating operation time, 5 minutes for reheating operation time for 5 minutes), the reheating operation is normally performed. It can be determined that “The refueling operation has been performed normally” corresponds to that the bath water in the bath 20 is heated to the target bath temperature almost uniformly as a whole. In this case, the control unit 10 ends the processing of this flowchart.

  On the other hand, in step S10, if the refueling operation time is shorter than the reheating appropriate time (for example, the reheating operation time is 3 minutes, the reheating appropriate time is 5 minutes), the bathtub in the bathtub 20 Since it is not considered that the whole of the water has been heated to the target bath temperature, it can be determined that the present reheating operation has not been performed normally.

  As a cause that the reheating operation was not performed normally, for example, the bather in the bathtub 20 is approaching the bathtub adapter 21 by bringing a foot or a back or the like close to the bathtub adapter 21. Is considered. When the bathtub adapter 21 which is the connection port is closed, when the bath water heated by the bottom heat exchanger 7 flows out from the second passage 5b into the bathtub 20, it does not spread into the bathtub 20, but immediately May be sucked into the first passage 5a. Then, the temperature of the bath water heated by the bottom heat exchanger 7 is detected by the bottom temperature detection means 8. As a result, in step S6, the temperature detected by the return temperature detection means 8 becomes equal to or higher than the target bathtub temperature, and the process proceeds to step S7 and step S8, and the reheating operation is stopped in a shorter time than reheating appropriate time. It will end up.

  In the present embodiment, in the case as described above, that is, when the refueling operation time is shorter than the reheating operation time, the control unit 10 temporarily ends the reheating operation, and the bathtub adapter 21 which is a connection port. The alerting | reporting information is alert | reported by alerting | reporting information which is the information which calls attention about whether it is closed, and re-starting driving | operation is started again after that. Thereby, the following effects can be obtained. When the bather is closing the bathtub adapter 21 with his / her feet or back, the bather can be expected to change his posture so as not to block the bathtub adapter 21 by notifying the bather of alert information. . Further, even when the bathtub adapter 21 is blocked by an article such as a towel, for example, it is expected that the bather may remove the article blocking the bathtub adapter 21 by notifying the bather of alert information. it can. Therefore, when the reheating operation is started again after notifying the alert information, the reheating operation is normally performed, and it is considered that the bathtub water in the bathtub 20 is heated to the target bathtub temperature substantially uniformly as a whole.

  FIG.4 and FIG.5 is a figure which shows the example which displayed alerting information on the display means 11a of the bathroom remote control 11. As shown in FIG. Among them, in the example shown in FIG. 4, the guidance display unit 30 of the display means 11a has words and sentences such as "Retried driving retried, can not perform repelled driving normally, can you not block the bathtub adapter with legs etc." it's shown. The display example of FIG. 4 is hereinafter referred to as “guidance A”. Note that the alert information is not limited to such words or sentences, and may use figures or marks.

  Hereinafter, the description will be continued returning to the flowchart of FIG. In step S10, when the reheating operation time is shorter than the reheating appropriate time, the control unit 10 adds 1 to the value of the "replication retry number" in step S11. The “retry number of retrials” is a variable stored in the control unit 10 as the number of times the repetitive reheating operation has been performed. When the process of the flowchart of FIG. 2 is started, the value of “refeed retry number” is zero.

  In the present embodiment, the control unit 10 limits the number of repeated reheating operations. That is, when the number of repeated reheating operations reaches the “first limited number of times”, the control unit 10 cancels the reheating operation without performing the reheating operation any more. In the following description, the first limit number is set to three as an example, but the first limit number may be set to one or more arbitrary number. Further, the user may change the value of the first limit number of times by operating the bathroom remote control 11 or the kitchen remote control 12.

  If the reheating operation is repeated too many times, a large amount of high temperature water in the hot water storage tank 2 may be consumed. In the present embodiment, by limiting the number of times the reheating operation is repeated, it can be reliably prevented that a large amount of high temperature water in the hot water storage tank 2 is consumed.

  In the flowchart of FIG. 2, in order to limit the number of repetitions of the refueling operation, at Step S12, the control unit 10 determines whether or not the value of the number of retrials for repelling is 3 or more, which is the first number of limitations. . When the value of the "number of retried retried times" is less than 3, the control unit 10 displays the display of the guidance A shown in FIG. 4 described above on the display means 11a as the alert information at Step S13. Return to S1 and start reheating from the beginning.

  In addition, after notifying the alerting information in step S13, the control unit 10 waits for a predetermined standby time (for example, several tens of seconds to several minutes) to elapse, and then returns to step S1 to drive the reheating operation. May be started. As a result, since the bather can be expected to notice the alerting information more reliably during the standby time, it can be expected that the refueling operation will be started after the bathtub adapter 21 is not blocked.

  Since the bather may not look at the display means 11a of the bathroom remote control 11, there is a possibility that he does not notice the alert information in step S13. For this reason, there is a possibility that the second reheating operation may be performed while the bathtub adapter 21 is closed. In that case, even in the second refueling operation, it is considered that the refueling operation time will be shorter than the reaping appropriate time, so the process proceeds from step S10 to step S11, and the third refueling operation is started. there is a possibility. Similarly, the fourth refueling operation may be performed.

  Even if the bather's body or article does not block the bathtub adapter 21, clogging of the bathtub adapter 21 may prevent the reheating operation from being performed normally. For example, in the bathtub adapter 21 having a mesh member covering the connection port, if the mesh member is clogged with dust or dirt, the connection port is blocked by the mesh member. In this case, there is a possibility that the bath water flowing out of the second passage 5b may be repelled by the mesh member and sucked into the first passage 5a as it is. In this manner, when the bathtub adapter 21 is clogged, the reheating operation may be repeated even if the bather is aware of the alert information in step S13.

  In the present embodiment, when the value of “number of retrials for reheating” is 3 or more in step S12, the control unit 10 sets the display of the guidance B shown in FIG. 5 as the alert information as step S14. It displays on the display means 11a. Thereafter, the control unit 10 stops the reheating operation without performing the reheating operation any more, and ends the processing of this flowchart.

  As described above, in the present embodiment, when the number of repetitive reheating operations reaches three, which is the first number of times of restriction, that is, the fourth repelling operation is performed including the first repelling operation. In the case, the refueling operation is discontinued without further refueling operation.

  In the example shown in FIG. 5, the guidance display unit 30 of the display means 11a uses as a warning information the sentence "The refueling operation was stopped. The reheating operation could not be performed normally. Is the bathtub adapter clogged?" it's shown. As described above, when the number of repeated refueling operations reaches the first limit number and the refueling operation is stopped, the alert information (the guidance before the number of repeated repulse operations reaches the first limited number Alerting information (guidance B) having contents different from A) may be notified by the information notification means. This makes it possible to reliably inform the user of, for example, information such as the reason why the reheating operation has been canceled. In the example of FIG. 5, the user can be surely notified that the bathtub adapter 21 may be clogged.

  According to the present embodiment, it is possible to promptly provide information to the user even when the inside of the bathtub 20 is difficult to be stirred because the bathtub adapter 21 is blocked during the reheating operation. It is advantageous in quickly eliminating the reheating operation abnormality. Moreover, it can prevent reliably that a user misunderstands that it is a malfunction of the hot-water supply apparatus 1. FIG.

  In step S14, in addition to the alerting information being notified by the display means 11a, the audio guidance means 11b of the bathroom remote control 11 may output voice guidance of the same content as the guidance B as the alerting information. That is, when the number of repeated reheating operations reaches the first limit number and the reheating operation is stopped, alerting information may be notified from both the display means 11a and the voice guidance means 11b. Thereby, even when the user is not in the bathroom or when the user does not look at the display means 11a, the user can be surely notified of information such as the reason why the reheating operation is stopped.

  On the other hand, the alerting information in step S13, that is, the alerting information when the number of repeated refueling operations has not reached the first limit number, is notified by the display means 11a without using the voice guiding means 11b. Is preferred. At the stage of step S13, since the user is likely to be in the bathtub 20 or in the bathroom, the user is likely to notice the alert information on the display means 11a, and the need for voice guidance is considered to be low. Therefore, in this case, by not performing the voice guidance, it is possible to prevent the user from feeling that the voice guidance which is less necessary is bothersome.

  In the present embodiment, the alert information (FIG. 4) which calls for attention as to whether the user's body or the like does not block the bathtub adapter 21 and whether the bathtub adapter 21 is clogged with dirt etc. Although alerting information (FIG. 5) to be awakened is divided and notified, alerting information having a combination of the two may be notified.

  Moreover, although alerting information is mainly alert | reported by the bathroom remote control 11 in this Embodiment, alerting information may be alert | reported by the kitchen remote control 12 which is an alerting means outside a bathroom, and the bathroom remote control 11 and the kitchen remote control The alerting information may be notified by both of 12.

  The control unit 10 notifies the alerting information in step S13, that is, alerting information when the number of repeated reheating operations has not reached the first limit number, via the bathroom remote control 11 without using the kitchen remote control 12. It is preferable to do. At the stage of step S13, since the user is likely to be in the bathtub 20 or in the bathroom, it is less necessary to notify the other users in the kitchen etc. of the alert information.

  On the other hand, with regard to the alert information in step S14, that is, the alert information when the number of repeated refueling operations reaches the first limit number and the repulsive operation is stopped, both of the bathroom remote control 11 and the kitchen remote control 12 It is preferable to notify. As a result, even if the user is not in the bathroom, it is possible to more reliably notify the user that the bathtub adapter 21 may be clogged.

  If the user operates the bathroom remote control 11 again to instruct reheating after the number of repeated reheating operations reaches the first limit number and the reheating operation is stopped, the control unit 10 The process of the flowchart of FIG. 2 is started again, and the reheating operation is re-executed. Thus, when the reheating operation is re-executed, when the number of repeated reheating operations after the re-execution reaches the second restriction number smaller than the first restriction number, the control unit 10 You may make it cancel without carrying out the reheating operation further. For example, in the processing of the flowchart of FIG. 2 after the rerun operation of the refueling operation, the control unit 10 may set the value to be compared with the “number of retried retries” to 2 or 1 in step S12. Under circumstances where the cause such as clogging of the bathtub adapter 21 is not removed, the user may instruct re-heating again. In such a case, wasteful consumption of energy can be suppressed by reducing the number of times of restriction for repeated reheating operation.

  On the other hand, when the reheating operation re-executed as described above ends normally, that is, when the process ends without making a transition from step S10 to step S11, the control unit 10 repeats the repetition of reheating. As the upper limit of the number of times of driving, the first limit number of times may be set instead of the second limit number of times. In this case, since it is considered that the cause such as clogging of the bathtub adapter 21 has been eliminated, it is not necessary to reduce the number of times of repeated reheating operation.

Reference Signs List 1 water heater, 2 hot water storage tank, 3 heat source fluid circulation circuit, 3a first passage, 3b second passage, 4 heat source side pump, 5 bathtub water circulation circuit, 5a first passage, 5b second passage, 6 bath circulation pump, 7 Heat exchanger for bath, 8 Back temperature detection means, 9 Flowing temperature detection means, 10 control section, 11 bathroom remote control, 11a display means, 11b voice guide means, 12 kitchen remote control, 12a display means, 12b voice guide means, 15 tank units, 20 bathtubs, 21 bathtub adapters, 30 guidance indicators

Claims (11)

Bath water heating means capable of heating bath water circulating from the bath through a circulation circuit having a bath circulation pump;
A bath return temperature detection means for detecting a bath return temperature which is a temperature of bath water on the inlet side of the bath water heating means;
Control means for controlling reheating operation for operating the bath circulation pump and the bath water heating means;
Information notification means for notifying the user of the information;
Equipped with
The control means temporarily ends the refueling operation when the time taken from the start of the refueling operation to the target temperature to reach the target temperature is shorter than a reference time. Alerting information, which is information for calling attention to whether or not the connection port through which the bathtub water flows in and out between the circuit and the inside of the bathtub, is notified by the information notification means, and then the reheating operation is performed. Water heater to start again.   The hot water supply apparatus according to claim 1, wherein when the number of repeated reheating operations has reached a first limit number, the control means stops the reheating operation without further execution.   In the case where the number of repetitions of the reheating operation reaches the first limit number of times and the reheating operation is stopped, the alert information before the number of repetitions of the repelling operation reaches the first number of restriction times The hot water supply apparatus according to claim 2, wherein the alerting means reports the alerting information having contents different from the information by the information notifying means. The information notification means includes display means for notifying by display and voice guidance means for notifying by voice guidance.
The alerting information is notified by the display means without using the voice guiding means when the number of repeated reheating operations has not reached the first limit number. Water heater. The information notification means includes display means for notifying by display and voice guidance means for notifying by voice guidance.
The alerting information is notified from both the display means and the voice guidance means when the number of repeated reheating operations reaches the first limit number and the reheating operation is stopped. The hot water supply apparatus according to any one of claims 4 to 10. The information notification means is provided in a bathroom,
It further comprises an out-of-bath notification means provided at a place other than the above-mentioned bathroom,
When the number of repeated reheating operations has not reached the first limited number, the alerting information is notified by the information notifying unit without using the out-of-bath notification unit. The hot water supply apparatus according to any one of the above. The information notification means is provided in a bathroom,
It further comprises an out-of-bath notification means provided at a place other than the above-mentioned bathroom,
The alerting information is notified from both the information notifying means and the outside-bath notifying means when the number of repeated reheating operations reaches the first limit number and the reheating operation is stopped. The water heater according to any one of claims 2 to 6.   In the case where the control means causes the reheating operation to be re-executed according to the user's operation after the number of repetitions of the reheating operation has reached the first limit number and the reheating operation is stopped. When the number of repetitions of the reheating operation after the re-execution reaches a second limit number of times smaller than the first number of times of restriction, the repelling operation is stopped without further execution. The hot water supply apparatus according to any one of claims 7 to 10.   The control means terminates the refueling operation re-executed according to the user's operation after the number of repeated repelling operations reaches the first limit number and the repelling operation is stopped. 9. The hot water supply apparatus according to claim 8, wherein the first limit number of times instead of the second limit number of times is set as the upper limit of the number of repeated reheating operations.   The hot water supply apparatus according to any one of claims 1 to 9, wherein the bath water heating means comprises a heat exchanger that exchanges heat between the heat source fluid and the bath water.   The control means calculates the reference time based on the temperature at which the reheating operation is started, the target temperature, and the amount of bathtub water in the bathtub. The hot water supply apparatus according to any one of the above.

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