JP4187715B2 - Heat source system - Google Patents

Description

  The present invention provides a hot water supply unit for supplying hot water to a bathtub through a hot water supply pipe, drain discharge means for discharging drain generated in the hot water supply part and stored in the storage part through the drain pipe, and the drain in the storage part A drain amount detecting means for detecting a storage amount and a control means for controlling the operation of the hot water supply unit and the drain discharging means are configured, and the control means is configured to supply heated hot water based on a hot water supply command. Based on the hot water supply process for controlling the operation of the hot water supply unit to supply to the bathtub through the hot water supply pipe, and the detection information of the drain amount detection means, it is detected that the drain is full or close to it It is configured to execute a full drain discharge process for controlling the operation of the drain discharge means so as to discharge the drain, and the hot water supply pipe and the drain About the heat source system provided in a state in which the tube is accommodated in the common protective tube.

  In the heat source system having the above configuration, the hot water supply unit is configured to execute a reheating process for heating hot water in the bathtub or a hot water filling process for the bathtub as the hot water supply process, and the hot water supply pipe The drain pipe is provided in a state of being housed in a common protective pipe together with the outgoing pipe for the bath and the return pipe for the bath. And conventionally, when the control means detects that the drain storage amount is full or close to it, the drain amount detection means operates the drain discharge means to discharge the drain. (For example, see Patent Document 1).

  In addition, the drain generated and recovered from the latent heat recovery type heat exchanger provided in the hot water supply unit is stored in the storage unit, and the storage amount of the drain is full or close to that in the storage unit Then, the drain is discharged, and the pipes are housed in a common protective pipe so that the work can be easily performed by piping them together. is there.

JP 2003-156256 A

  In the conventional configuration, when the storage amount of the drain is full or close to the state in the storage unit, drain drainage is discharged. For example, the hot water supply unit performs the reheating operation, and the hot water supply pipe For example, when drainage is discharged through the drain pipe while hot water of about 60 ° C. is being supplied from the outgoing pipe for bathing as described above, the hot water supply pipe and the drain pipe are common as described above. Since the drain pipe absorbs heat from the hot water supply pipe, the temperature of the drain pipe and the drain flowing through the drain pipe rises. As a result, there is a possibility that the temperature of the drain discharged from the bathroom becomes high so as to exceed 50 ° C., for example. Such drain is discharged regardless of the intention of the bathroom user bathing in the bathroom, and when the temperature of the drain becomes high, such hot drain is formed in the body of the bathroom user. There is a disadvantage that safety cannot be secured such as unexpected contact.

  In addition, the upper limit value of the temperature of the drainage discharged to the outside from ordinary households may be regulated by the Sewerage Law to be less than 45 ° C. From this point as well, the temperature of the drain is reduced. Is required.

  Note that the hot water supply process in the hot water supply section is not limited to the reheating operation, and even when the hot water filling operation in which heated hot water is supplied to the bathtub through the hot water supply pipe to fill the bathtub is performed, When the target temperature for hot water supply is set to a high temperature (for example, about 47 to 48 ° C.), the discharged drain becomes high temperature and the above-described disadvantage may occur.

  An object of the present invention is to provide a heat source system that can prevent the temperature of discharged drain from rising.

  The first characteristic configuration of the present invention includes a hot water supply part that supplies hot water to a bathtub through a hot water supply pipe, drain discharge means that discharges drain generated in the hot water supply part and stored in the storage part through the drain pipe, A drain amount detection means for detecting the amount of drain storage in the storage section, and a control means for controlling the operation of the hot water supply section and the drain discharge means, the control means is based on a hot water supply command, The hot water supply process for controlling the operation of the hot water supply unit to supply heated hot water to the bathtub through the hot water supply pipe, and the drain is full or close to the state based on the detection information of the drain amount detection means When it is detected, it is configured to execute a full drain discharge process for controlling the operation of the drain discharge means so as to discharge the drain. The heat source system is provided in a state where the drain pipe is housed in a common protective pipe, and when the control means executes the hot water supply process, the drain is discharged prior to the hot water supply process. It is the point which is comprised so that the prior | preceding drain discharge process which controls the action | operation of the said drain discharge means may be performed so that it may discharge.

  According to the first characteristic configuration, when executing the hot water supply process, the control means performs a preceding drain discharge process for controlling the operation of the drain discharge means so as to discharge the drain prior to the hot water supply process. When the hot water supply process is executed, the drain stored in the storage unit has already been discharged, and the hot water supply process is performed to generate drain from the hot water supply unit. Even if the drain is stored in the storage unit, the storage unit will not be full or close to it in a short time.

  In other words, even when hot water is being supplied from the hot water supply pipe to the bathtub while the hot water supply process is being executed, the drain drain process is performed when the hot water supply process is being performed. Therefore, it is possible to avoid draining as much as possible through the drain pipe while the hot water supply pipe is at a high temperature by executing the hot water supply process.

  Therefore, the heat source system which can prevent the temperature rise of the drain discharged through the drain pipe can be provided.

  In the second feature configuration of the present invention, in addition to the first feature configuration, the drain storage amount detected by the drain amount detection unit is less than a set amount when the control unit executes the hot water supply process. Or when the amount of drain stored in the storage unit is predicted to be less than the set amount, the preceding drain discharge process is not executed.

  According to the second feature configuration, when the hot water supply process is executed, the amount of drain stored in the storage unit detected by the drain amount detection means is less than a set amount, or the storage When the amount of drain stored in the storage unit is predicted to be less than the set amount, in short, when the amount of drain stored in the storage unit is a small amount that does not satisfy the set amount, the preceding drain discharge process is not executed. It is like that.

  When the amount of drain storage in the storage unit is a small amount that does not reach the set amount, it is considered that the storage unit will not be full or close to the state in a short time even if the hot water supply process is executed. Even in such a state, if the control means always executes the leading drain discharge process when the warm water supply process is performed, each time the warm water supply process is repeated at short intervals, the leading drain discharge is performed each time. There is a disadvantage that the drain discharging means repeatedly operates even though the drain is not stored so much in the storage part.

  Therefore, when the hot water supply process is executed, if the amount of drain stored in the storage unit is a small amount less than the set amount, the preceding drain discharge process is not executed, so that the drain discharge means repeatedly operates unnecessarily. Therefore, it is possible to prevent the temperature of the drain from rising without any disadvantage.

  In the third feature configuration of the present invention, in addition to the first feature configuration or the second feature configuration, the hot water supply command is a short time for instructing a hot water supply process that is predicted to end in a short time after starting. A processing command and a long-time processing command for commanding a hot water supply process that is predicted to end in a long time after starting, and the control means supplies hot water along with the long-time processing command. When the process is executed, the preceding drain discharge process is executed prior to the hot water supply process, and when the hot water supply process is executed in accordance with the short-time processing command, the hot water supply process is executed prior to the hot water supply process. There exists in the point comprised so that a prior | preceding drain discharge process may not be performed.

  According to the third characteristic configuration, when a long-time processing command is issued that commands a hot water supply process that is predicted to end in a long time after the process is started in accordance with the hot water supply command, When the hot water supply process is executed in accordance with the processing command, the preceding drain discharge process is executed prior to the hot water supply process. Such a hot water supply process requires a long period of time from the start of the process to the end of the process. Therefore, the drain generated from the hot water supply unit by executing the hot water supply process is required. However, since the pre-drain discharge process is executed prior to the hot water supply process, it is less likely that the storage part will become full or close to it by discharging the drain in the storage part in advance. It becomes.

  Examples of the hot water supply process executed in accordance with the long-time processing command include a hot water filling process for filling a bathtub, or a refilling process for chasing remaining hot water after a long time has passed since the hot water filling was performed. There are processing. Such a process requires a long time from the start to the end.

  On the other hand, when a short-time processing command that is predicted to be completed in a short time after the processing is started in accordance with the hot water supply command is executed, the hot water supply processing is executed in accordance with the short-time processing command. Since the preceding drain discharge process is not executed prior to the hot water supply process, the drain discharge means does not operate unnecessarily. Such a hot water supply process is a short time from the start of the process to the end of the process, and the amount of drain generated from the hot water supply unit by executing the hot water supply process is small. Even if the preceding drain discharge process is not executed prior to the process, there is little possibility that the storage part becomes full or close to it.

  As the hot water supply process executed in accordance with the short-time processing command, for example, a finishing replenishment process performed immediately after the hot water filling to the bathtub is completed, or the hot water temperature of the bathtub is maintained at the set temperature after the hot water filling. There is a tracking process that is automatically and repeatedly executed. When these chasing processes are performed, the hot water temperature is not greatly lowered from the set temperature, and therefore, the hot water is finished in a short time after starting.

Therefore, as described above, it is disadvantageous that the drain discharge means operates more than necessary by executing the preceding drain discharge process only when executing the warm water supply process that may cause the storage part to become full or close to it. It is possible to prevent the temperature of the drain from rising in the absence of this.

  According to a fourth feature configuration of the present invention, in addition to any one of the first feature configuration to the third feature configuration, the control means supplies hot water heated to a hot water supply temperature for bath as the hot water supply process through the hot water supply pipe. A hot water filling process to be supplied to the bathtub, and a reheating process for supplying hot water heated to a temperature higher than the hot water supply temperature for the bath to the bathtub through the hot water supply pipe, and the reheating process are performed. When executing, the preceding drain discharge process is executed prior to the follow-up process, and when the hot water filling process is executed, the preceding drain discharge process is not executed prior to the hot water filling process. There is in point.

  According to the fourth characteristic configuration, when the hot water filling process is executed, hot water heated to the hot water supply temperature for bath is supplied to the bathtub through the hot water supply pipe. In general, the target temperature for hot water supply is often set to a temperature lower than 45 ° C., for example, and even if drain is discharged through the drain pipe during hot water treatment, it is discharged. It is rare for the drain to reach a high temperature exceeding 45 ° C. On the other hand, when the reheating process is executed, the hot water heated to a temperature higher than the hot water supply temperature for bath (for example, 60 ° C.) is supplied to the bathtub through the hot water supply pipe. If the drain is discharged through the drain pipe during the operation, the drain is likely to reach a high temperature exceeding 45 ° C.

  Therefore, the drain draining unit operates more than necessary because the preceding drain discharge process is executed prior to the follow-up process only when the follow-up process is executed, which is likely to cause the discharged drain to become hot. Therefore, it is possible to prevent the temperature of the drain from rising without any disadvantage.

  A fifth characteristic configuration of the present invention is a hot water supply unit that supplies hot water to a bathtub through a hot water supply pipe, drain discharge means that discharges drain generated in the hot water supply part and stored in the storage part through the drain pipe, A drain amount detection means for detecting the amount of drain storage in the storage section, and a control means for controlling the operation of the hot water supply section and the drain discharge means, the control means is based on a hot water supply command, The hot water supply process for controlling the operation of the hot water supply unit to supply heated hot water to the bathtub through the hot water supply pipe, and the drain is full or close to the state based on the detection information of the drain amount detection means Is detected, and the drain discharge process is performed when the drain is discharged to control the operation of the drain discharge means so as to discharge the drain. And a heat source system provided in a state in which the drain pipe is housed in a common protective pipe, and the control means detects the drain amount detection means when executing the hot water supply process. When it is detected based on the information that the drain is full or close to it, the flow of hot water supplied through the hot water supply pipe is interrupted and the temperature of the hot water supply pipe is lowered by interrupting execution of the hot water supply process After the flow state changing process for changing the state is executed, the full drain discharge process is executed.

According to the fifth characteristic configuration, when the hot water supply process is being executed, if it is detected that the drain is full or close to the state based on the detection information of the drain amount detection means, the hot water supply process is executed. After performing the flow state change process that interrupts and changes the flow state of the hot water supplied through the hot water supply pipe so as to lower the temperature of the hot water supply pipe, the drain drain process is performed to fill the storage section. The drainage drainage is discharged. As described above, after the execution of the hot water supply process is interrupted, the flow state changing process and the full drain discharge process are executed, and after executing these processes, the hot water supply process is executed. It will return to a state and the hot water supplied by continuing and performing a warm water supply process can be supplied to a bathtub through piping for hot water supply.

  In other words, if the drain is full or close to the state during the hot water supply process, the flow changes the flow state of the hot water supplied through the hot water supply pipe so as to lower the temperature of the hot water supply pipe. Since the drain is discharged through the drain pipe after the state change process is executed, the temperature of the hot water supply pipe is lowered when the drain is discharged, and the temperature of the discharged drain does not rise.

  Therefore, the heat source system which can prevent the temperature rise of the drain discharged through the drain pipe can be provided.

  In addition to the fifth feature configuration, the sixth feature configuration of the present invention is configured such that the control means lowers the temperature of hot water supplied to the bathtub through the hot water supply pipe as the flow state change process. In the point.

  According to the sixth feature configuration, when the hot water supply process is being performed, when the drain is full or close to it, the temperature of the hot water supplied to the bathtub through the hot water supply pipe is lowered. The temperature of the hot water supply pipe also decreases in accordance with the temperature of the hot water, and it is possible to reliably prevent the temperature of the drain discharged through the drain pipe from rising.

  In addition to the fifth characteristic configuration or the sixth characteristic configuration, the seventh characteristic configuration of the present invention supplies the hot water heated to the hot water supply temperature for the bath to the bathtub through the hot water supply pipe as the hot water supply process. A hot water filling process, and a reheating process for supplying hot water heated to a temperature higher than the hot water supply temperature for the bath to the bathtub through the hot water supply pipe, and the reheating process is performed. When it is detected that the drain is full or close to the state based on the detection information of the drain amount detection means, the full drain discharge process is executed after the flow state change process is executed. When the hot water filling process is performed, if it is detected that the drain is full or close to the state based on the detection information of the drain amount detection means, the fluid state In that it is configured to execute the full drainage process without executing the changing process.

  According to the seventh feature configuration, when the hot water filling process is executed, hot water heated to the hot water supply temperature for the bath is supplied to the bathtub through the hot water supply pipe. In general, the target temperature for hot water supply is often set to a temperature lower than 45 ° C., for example, and even if drain is discharged through the drain pipe during hot water treatment, it is discharged. It is rare for the drain to reach a high temperature exceeding 45 ° C. On the other hand, when the reheating process is executed, the hot water heated to a temperature higher than the hot water supply temperature for bath (for example, 60 ° C.) is supplied to the bathtub through the hot water supply pipe. If the drain is discharged through the drain pipe during the operation, the drain is likely to reach a high temperature exceeding 45 ° C.

  Therefore, when performing the pursuit process, if it is detected that the drain is full or close to the state based on the detection information of the drain amount detection means, the full drain discharge process is performed after the flow state change process is performed. Since the operation is performed, there is no possibility that the drain to be discharged reaches a high temperature exceeding 45 ° C., and it becomes possible to prevent the temperature of the drain from rising.

  On the other hand, when performing the hot water filling process, if it is detected that the drain is full or close to the state based on the detection information of the drain amount detecting means, the full drain discharge is performed without executing the flow state changing process. Although the process is executed, there is little possibility that the drained drain will be at a high temperature exceeding 45 ° C. even if the hot water filling process is executed.

The eighth characteristic configuration of the present invention includes a hot water supply unit that supplies hot water to a bathtub through a hot water supply pipe, drain discharge means that discharges drain generated in the hot water supply part and stored in the storage part through the drain pipe, A drain amount detection means for detecting the amount of drain storage in the storage section, and a control means for controlling the operation of the hot water supply section and the drain discharge means, the control means is based on a hot water supply command, The hot water supply process for controlling the operation of the hot water supply unit to supply heated hot water to the bathtub through the hot water supply pipe, and the drain is full or close to the state based on the detection information of the drain amount detection means And a drain discharge process at full time for controlling the operation of the drain discharge means so as to discharge the drain when it is detected, the hot water supply pipe and the front A heat source system provided in a state where the drain pipe is housed inside a common protective tube, said control means, after the completion of the execution of the hot water supply process, the drain discharged through the drain pipe In order to reduce the temperature of the hot water supply pipe so as to suppress the temperature rise, a temperature lowering process for supplying hot water at a temperature lower than the temperature of the hot water when the hot water supply process is executed through the hot water supply pipe is executed. It is in the point which is comprised.

  According to the eighth characteristic configuration, after the execution of the hot water supply process, the control means is more than the temperature of hot water when the hot water supply process is executed so as to lower the temperature of the hot water supply pipe. A temperature lowering process for supplying low temperature hot water through the hot water supply pipe is executed. That is, even when the hot water supply process is being performed, even when hot water having a high temperature exceeding 45 ° C. is supplied through the hot water supply pipe, for example, The temperature of the hot water supply pipe is lowered by supplying hot water at a temperature lower than the temperature of the hot water at the time of executing the hot water supply process, for example, lower than 45 ° C., through the hot water supply pipe.

  Therefore, after the execution of the hot water supply process is completed, it is detected that the drain is full or close to the state based on the detection information of the drain amount detection means, and the full drain discharge process is executed. However, since the temperature of the hot water supply pipe is lowered by executing the above-described temperature lowering process, there is no possibility that the drained drain will become a high temperature exceeding 45 ° C., for example, and the drain temperature rise is prevented. It becomes possible.

  Therefore, the heat source system which can prevent the temperature rise of the drain discharged through the drain pipe can be provided.

  The ninth characteristic configuration of the present invention is, in addition to the eighth characteristic configuration, a hot water filling process in which the control means supplies hot water heated to a hot water supply temperature for bath to the bathtub through the hot water supply pipe, as the hot water supply process, And it is comprised so that the reheating process which supplies the hot water heated to the temperature higher than the hot water supply temperature for the said bath to a bathtub through the said hot water supply piping, and after finishing execution of the said reheating process, the said temperature The temperature reduction process is configured to be executed, and the temperature reduction process is not executed after the hot water filling process is finished.

  According to the ninth characteristic configuration, when the hot water filling process is executed, hot water heated to the hot water supply temperature for the bath is supplied to the bathtub through the hot water supply pipe. The target temperature for hot water supply is generally set to a temperature lower than 45 ° C., for example, and even if drain is discharged through the drain pipe during hot water treatment, There is little risk that the drain to be discharged will be at a high temperature exceeding 45 ° C. On the other hand, when the reheating process is executed, the hot water heated to a temperature higher than the hot water supply temperature for bath (for example, 60 ° C.) is supplied to the bathtub through the hot water supply pipe. If the drain is discharged through the drain pipe during the operation, the drain is likely to reach a high temperature exceeding 45 ° C.

  Therefore, it is configured to execute the temperature lowering process after finishing the execution of the chasing process, and is configured not to execute the temperature lowering process after the execution of the hot water filling process. When performing a follow-up process that is likely to cause the discharged drain to become high temperature, the temperature decrease process can be performed to prevent the temperature of the drain from rising. On the other hand, since the temperature lowering process is not performed when performing the hot water filling process in which the discharged drain is less likely to become a high temperature, the temperature of the hot water supply pipe can be unnecessarily lowered to lower the thermal efficiency. Absent.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
FIG. 1 shows a hot water supply apparatus as an example of a heat source system according to the present invention. In this hot water supply apparatus, as a hot water supply section for supplying hot water to a bathtub through a hot water supply pipe, water from a water supply channel 1 connected to a general household water pipe is heated by a gas combustion type burner g1 as a combustion burner. The hot water supply is heated by a hot water supply operation section A for supplying hot water to a hot water supply passage 3 provided with a hot water tap 2 at the tip, and hot water in the bathtub 5 by a gas combustion type burner g2 as a combustion burner. And a memorizing operation unit B for whispering. The hot water supply operation unit A and the chasing operation unit B are each configured to include a main heat exchanger N1 and a latent heat recovery heat exchanger N2 arranged in two stages, and the latent heat recovery heat exchanger N2 includes The combustion exhaust gas after the heat exchange is exhausted to the outside through the exhaust passage 7.

  The latent heat recovery heat exchanger N2 generates drainage that is acidic condensate that is combustion product water. This drain is collected by the drain pan 8 and neutralized by the neutralizer 9, and then used as a reservoir. The drain tank DT is configured to store. Although not described in detail, the neutralizer 9 is loaded with a neutralizing agent (for example, calcium carbonate) that neutralizes condensed water.

  A gas supply path G for supplying general household fuel gas to the burners g1 and g2 is connected to the hot water supply operation unit A and the memory operation unit B, and an electromagnetic gas for adjusting the fuel gas supply amount. A proportional valve 10 and an intermittent valve 11 for intermittently supplying fuel gas are provided. A combustion fan 12 for supplying combustion air to the burners g1 and g2 is also provided, and an ignition igniter for performing an ignition operation on the burner g1 and a flame rod for detecting whether or not the burner g1 is ignited are provided near the burner g1. Etc. are provided.

  Connected to the hot water supply operation section A are a water supply path 1 and a hot water supply path 3 for discharging hot water after heating after passing through the main heat exchanger N1 and the latent heat recovery heat exchanger N2. The water as the fluid to be heated is subjected to heat exchange so that hot water having a desired temperature is supplied through the hot water supply passage 3.

  The water supply channel 1 is provided with a water supply thermistor 13 for detecting the water supply temperature and a water amount sensor 14 for detecting the water supply amount, and the water supply channel 1 and the hot water supply channel downstream of the water supply thermistor 13 and the water amount sensor 14. 3 is connected via a water supply bypass 15 so as to bypass the heat exchangers N1 and N2. Further, in the hot water supply path 3, the hot water thermistor 16 for detecting the temperature of hot water from the hot water supply heat exchanger 4, the amount of hot water from the hot water supply heat exchanger 4, and the water supply bypass path 15 are sequentially connected from the upstream side. A mixing valve 17 for adjusting the mixing ratio with the amount of water, a hot water thermistor 18 for detecting the temperature of hot water after mixing by the mixing valve 17, a water proportional valve 19 for adjusting the amount of hot water, and a general hot water supply An interrupt water amount sensor 20 that detects an interrupt is provided.

A hot water supply passage 22 for supplying hot water from the hot water supply passage 3 to the bathtub 5 is branched and connected to the hot water supply passage 3 between the water proportional valve 19 and the interrupt water amount sensor 20. The remedy operation section B is connected to a bathtub return path 23 from the bathtub 5 and a bathtub outbound path 24, and the bathtub return path 23 and the bathtub outbound path 24 are configured as a circulation path. And the return path 23 for bathtubs and the outward path 24 for bathtubs are connected to the bathtub 5 through the bath adapter 25, and the circulation pump 26 provided in the return path 23 for bathtubs is driven, The inside of the bathtub 5 While the hot water is circulated through the bathtub return path 23 and the bathtub outbound path 24, it is configured to perform a remedy by the remedy operation section B.

  In the bathtub return path 23, a water level sensor 27 serving as a water level detecting means for detecting the water level in the bathtub 5 by detecting pressure in order from the upstream side, and a bath temperature for detecting the temperature of hot water in the bathtub 5. A return thermistor 28 as detection means, an electromagnetic bath two-way valve 29 for opening and closing the bathtub return path 23, a circulation pump 26 for circulating hot water, and a water flow switch 30 are provided, and the bathtub outbound path 24 is provided with a thermistor 31 for a bathtub.

  The hot water filling path 22 for the bath is connected to a return path 23 for the bathtub between the recirculation circulation pump 26 and the water flow switch 30. The hot water filling passage 22 is provided with a hot water solenoid valve 32 that opens and closes the hot water filling passage 22 from the upstream side, and a hot water filling check valve 33. An air layer forming hopper 34 communicating with the hot water filling passage 22 is interposed in the hot water filling passage 22 between the hot water filling solenoid valve 32 and the hot water filling check valve 33. The air layer forming hopper 34 is provided with a drainage channel 35 for draining hot water and an electromagnetic drainage valve 36 for opening and closing the drainage channel 35, and the end of the drainage channel 35 is connected to the bath two-way valve 29. It is connected to a bathtub return path 23 between the circulation pump 26.

  In this hot water supply device D, as a drain pipe 44 for guiding the drain stored in the drain tank DT toward the washing place Y1 of the bathroom Y, and a drain discharging means for forcibly discharging the drain through the drain pipe 44. The drain pump 45 and a backflow prevention valve 46 for preventing the backflow of the drain are provided. As shown in FIGS. 2 and 3, the drain pipe 44 is bundled together with the bathtub return path 23 and the bathtub outbound path 24 and accommodates them in a protective pipe (CD pipe) 47 made of synthetic resin. It is the structure installed so that it may go to the bathroom washroom Y1 in the state made. And it is comprised so that it may open toward the bathroom Y inside from the downward side location of the counter kt for washing in the washing place Y1, and it drains to the washing place Y1.

  The operation control unit H1 as a control means for controlling the operation state of the hot water supply device includes a microcomputer and is configured to be able to communicate with a remote control device R1 installed indoors. The remote control device R1 includes an operation switch 37 for instructing start and stop of operation, an automatic switch 38 for instructing automatic bath operation, a temperature setting switch 39 for setting a general hot water supply temperature, and a water level setting for setting a target water level in the bathtub 5. A switch 40, an additional hot water switch 41 for adding hot water to the bathtub, a memorial switch 42 for instructing memorial operation, and the like are provided.

  Then, as shown in FIG. 1, the drain tank DT is turned on when the stored amount of stored drain exceeds the set amount on the large side which is almost full, and falls below the set amount on the large side. An upper detection sensor 48 that is turned off when the drain is stored, and a lower detection sensor 48 that is turned on when the drain storage amount exceeds the set amount on the small side and that is turned off when the drain storage amount is below the set amount on the small side. The operation control unit H1 is configured to control the operation of the drain pump 45 based on the detection information of the sensors 48 and 49. These sensors 48 and 49 constitute drain amount detecting means DK for detecting the amount of drain stored in the drain tank DT.

The control operation by the operation control unit H1 will be briefly described.
The operation control unit H1 is in a controllable state when the operation switch 37 of the remote control device R1 is operated, and performs a general hot water supply operation of supplying hot water from the hot water tap 2 when the hot water tap 2 is opened. In this general hot water supply operation, when the hot-water tap 2 is opened and the amount of water detected by the water amount sensor 14 exceeds a predetermined amount, the combustion fan 12 in the hot water supply operation unit A is driven, and then the intermittent valve 11 is opened to proportionally increase the gas. The opening of the valve 10 is adjusted and the burner g1 is ignited by an igniter, the set temperature by the temperature setting switch 39, the detected water temperature by the hot water thermistor 13, the hot water temperature by the hot water thermistor 16, the detected water amount by the water amount sensor 14, etc. The opening degree of the gas proportional valve 10 and the opening degree of the mixing valve 17 are controlled so that the hot water supply temperature detected by the hot water supply thermistor 16 becomes the set temperature. When water flow is no longer detected, the gas proportional valve 10 and the intermittent valve 11 are closed to stop the combustion of the burner g1, and the combustion fan 12 is also stopped to end the general hot water supply operation.

  When the additional hot water switch 41 of the remote control device R1 is operated, the operation control unit H1 performs hot water supply to the bathtub 5 so that the water level of the bathtub 5 becomes the set water level, and stops the hot water supply when the set water level is reached. Perform hot water operation.

  When the automatic switch 38 of the remote control device R1 is operated, the operation control unit H1 executes bath automatic control. In this bath automatic control, automatic hot water filling is first executed. This automatic hot water filling is controlled by heating by the hot water supply operation part A in the same manner as in the general hot water supply operation, and hot water at a set temperature is supplied to the bathtub return path 23 and the bathtub forward path 24 via the hot water filling path 22. The bathtub 5 is supplied into the bathtub 5 from both the bathtub return path 23 and the bathtub outbound path 24. Then, when the detected water level of the water level sensor 27 is equal to or higher than the set water level, the hot water supply operation unit A stops heating and finishes filling the bathtub 5 with water. When hot water filling to the bathtub 5 is completed, if the temperature detected by the return thermistor 28 is lower than the set temperature, the recirculation circulation pump 26 is driven, and hot water in the bathtub 5 and hot water discharged from the hopper 34 Are circulated through the bathtub return path 23 and the bathtub return path 24, etc., and are memorized by the memorial operation unit until the temperature detected by the return thermistor 28 reaches the temperature set by the temperature setting switch 42 of the bath remote controller R2. I do. When the temperature detected by the return thermistor 28 reaches the temperature set by the temperature setting switch 42 of the remote controller R1, the circulation pump 26 for remedy is stopped and the remedy heating is finished.

  The driving control unit H1 performs a chasing operation when the chasing switch 42 of the remote control device R1 is operated. In this chasing operation, the following processing is basically executed. In other words, the circulation pump 26 for remedy is driven to circulate hot water in the bathtub 5 through the bathtub return path 23, the bathtub return path 24, and the like, and the detected temperature of the bathtub forward thermistor 31 is added. The hot water circulating in the chasing operation section B is heated so as to reach the dredging temperature (60 ° C.), and when the temperature detected by the return thermistor 28 reaches the temperature set by the temperature setting switch 42, the circulation pump 26 for chasing is used. The hot water circulation operation and the heating operation in the memory operation unit B are stopped.

  Therefore, the operation control unit H1 performs the hot water filling process by turning on the automatic switch 41 as a hot water supply command, the automatic tracking process after the hot water filling operation, and the on operation of the additional hot water switch 38 as a hot water supply command. An additional hot water process and a chasing process by turning on the chasing switch 42 as a hot water supply command are executed. And when performing the tracking process by turning on the tracking switch 42, the operation of the drain pump 45 is controlled so that the drain stored in the drain tank DT is discharged prior to the tracking process. When the hot water filling process, the automatic refilling process after the hot water operation, and the additional hot water process are executed, the preceding drain discharge process is not executed prior to those processes.

The chasing process by turning on the chasing switch 42 is operated in a state in which the hot water temperature is greatly lowered. The subsequent automatic tracking process is expected to end in a short time after the process is started. Therefore, in this embodiment, the hot water supply command by turning on the tracking switch 42 corresponds to the long-time processing command, and the hot water supply command for tracking by operating the automatic switch 38 corresponds to the short-time processing command. .

  When the operation control unit H1 performs the tracking process by turning on the tracking switch 42, the upper detection sensor 48 in the drain tank DT is switched from OFF to ON, and the drain tank DT is full of drain or When it is detected that the state is close to that, the flow of hot water supplied through the bathtub going-out path 24 is stopped so that the execution of the memorial process is interrupted and the temperature of the bathtub going-out path 24 as a supply pipe is lowered. After the flow state changing process to be changed is executed, the full drain discharge process is executed. Specifically, the flow state changing process is configured to reduce the temperature of hot water supplied to the bathtub through the bathtub outgoing path 24.

  Furthermore, the operation control unit H1 performs hot water when performing the chasing process so as to lower the temperature of the bathtub going-out path 24 after the chasing process by turning on the chasing switch 42 is finished. A temperature lowering process for supplying hot water having a temperature lower than the temperature through the bathtub going-out path 24 is executed.

Hereinafter, a specific control operation of the chasing control accompanying the turning-on operation of the chasing switch 42 by the operation control unit H1 that executes each of the above-described processes will be described.
That is, as shown in FIG. 4, when the tracking switch 42 is turned on and the tracking is instructed, whether or not the amount of drain stored in the drain tank DT at that time is a small amount less than the set amount. (Steps 1 and 2). Specifically, from the integrated value of the combustion amount (fuel supply amount) in each of the burners g1 and g2 from the time when the drain pump 45 is operated last time to discharge the drain to the present time, the accumulated value is stored. The amount of drain that has been discharged is estimated, and it is determined whether or not the storage amount of the drain tank DT is a small amount that does not satisfy the set amount.

  At that time, if it is determined that the drain amount is larger than the set amount, the drain pump 45 is operated so as to discharge the drain in the drain tank DT and the drain discharge is started, and the lower detection sensor 49 is switched from ON to OFF. If it is detected that the drainage is completed, the operation of the drain pump 45 is stopped and the discharge process is terminated (steps 3 to 5). The processes in steps 3 to 5 correspond to the preceding drain discharge process.

  Then, the operation of the circulation pump 26 for remedy is started, and hot water in the bathtub 5 is circulated through the return path 23 for the bathtub and the forward path 24 for the bathtub. Combustion is started, and a chasing process for supplying hot water heated by the chasing heat exchanger 6 to the bathtub 5 is started (steps 6 and 7). That is, the circulating hot water is heated by adjusting the amount of combustion of the burner g2 so that the detection temperature of the bathtub forward thermistor 31 becomes the temperature for remedy (60 ° C.).

  While the memory processing is being executed, the upper detection sensor 48 in the drain tank DT is switched from OFF to ON, and when it is detected that the drain is full or close to the drain tank DT, as described above. The combustion of the burner g2 is stopped and the reheating is stopped (steps 8 and 9). At this time, since the circulation circulation operation of the hot water by the circulation pump 26 for the remedy is continued, the process of stopping the remedy heating by the burner g2 is performed so that the temperature of the bathtub outbound path 24 is lowered. This corresponds to the flow state changing process for changing the flow state of the hot water supplied through the outgoing path 24. Therefore, at this time, even if the drain is discharged through the drain pipe 44, the drain does not reach a high temperature.

When the set time (several minutes) has elapsed after the timer has started counting and the timer has counted up to stop the memorial heating, the drain pump 45 is operated so as to discharge the drain in the drain tank DT. When drain discharge is started and the lower detection sensor 49 is switched from ON to OFF and it is detected that drainage is completed, the operation of the drain pump 45 is stopped and the discharge process is terminated (steps 10 to 14). The processes in steps 12 to 14 correspond to the full drain discharge process.

  When the drainage is finished, the burner g2 is ignited and the reheating is resumed (step 15). Then, the hot water is heated by the additional heating, and the additional heating is stopped when the temperature detected by the return thermistor 28 reaches the temperature set by the temperature setting switch 42 (steps 16 and 17). The chasing process is completed by stopping the chasing heating.

  When the tracking process is completed, the timer starts counting, and when the set time (several minutes) elapses after the timer counts up and ends the tracking process, the operation of the circulation pump 26 for tracking is started. Stop (steps 18 to 20). The processes in steps 18 to 20 correspond to the temperature lowering process. That is, after the memorial process is completed, the hot water in the bathtub 5 is circulated through the bathtub return path 23, the bathtub return path 24, and the like without being heated by the burner g2. The temperature of the hot water inside is the same as the temperature of the hot water in the bathtub 5, which is lower than the hot water temperature (about 60 ° C.) during the memory treatment, so that the drain is discharged through the drain pipe 44. However, the drain does not reach a high temperature.

  When the control other than the above-described tracking control, the automatic operation accompanying the operation of the automatic switch 38, or the addition water operation is performed, the upper detection sensor 48 in the drain tank DT is switched from OFF to ON, and the drain When it is detected that the drain is full or close to the tank DT, the full drain discharge process is executed regardless of the hot water operation state.

[Second Embodiment]
Next, 2nd Embodiment of this invention is described based on drawing.
In the second embodiment, the form of control is different when performing automatic bath control by the operation control unit, but the hot water supply circuit configuration and other configurations of the hot water supply apparatus are the same as those in the first embodiment, and thus different configurations. Only the above will be described, and the description of the same configuration will be omitted.

  In this embodiment, when the operation control unit automatically executes the hot water filling process as the hot water supply process in accordance with the operation of the automatic switch, the hot water filling process is performed. Prior drain discharge processing for controlling the operation of the drain pump 45 so as to discharge the drain stored in the drain tank DT in advance is executed. Further, when performing the hot water filling process, if it is detected that the drain is full or close to the state based on the detection information of the drain amount detecting means, the execution of the hot water filling process is interrupted, It is configured to execute the full drain discharge process after executing a flow state changing process for changing the flow state of hot water supplied through the hot water supply pipe so as to lower the temperature of the hot water supply pipe.

Hereinafter, a specific control operation of the bath automatic control accompanying the ON operation of the automatic switch 38 by the operation control unit H1 will be described.
As shown in FIG. 5 and FIG. 6, when the automatic switch 38 is turned on, a set temperature for hot water filling set by the temperature setting switch 39 is set as the hot water filling target temperature. If the set temperature exceeds the threshold value (45 ° C.), the drain discharge process is executed before the automatic hot water filling process is executed (steps 31 to 34). The process in step 34 corresponds to the preceding drain discharge process. In this drain discharge process, as shown in FIG. 7, the drain pump 45 is operated so as to discharge the drain and drain discharge is started, and the lower detection sensor 49 is switched from ON to OFF, and the drainage is completed. If detected, the operation of the drain pump 45 is stopped and the discharge process is terminated (steps 52 to 54).

  If it is detected from the detection result of the water level sensor 27 that there is no remaining hot water in the bathtub 5 at that time, the hot water supply temperature detected by the hot water supply thermistor 16 is ignited by the burner g1 in the same manner as in the general hot water supply operation described above. Adjust the opening of the gas proportional valve 10 and the opening of the mixing valve 17 so that the temperature reaches the target temperature for hot water filling, and supply the hot water with the adjusted temperature to the bathtub 5 for hot water filling (step). 35-36). At this time, the bath two-way valve 29 is opened and supplied to the bathtub through both the bathtub return path 23 and the bathtub return path 24.

  In the middle of this hot water filling, when the upper detection sensor 48 in the drain tank DT is switched from OFF to ON and it is detected that the drain is full or close to the drain tank DT, If the set temperature does not exceed the threshold value (45 ° C.), the drain discharge process is executed immediately (steps 37 to 39). If the set temperature for hot water filling exceeds the threshold value, the target temperature for hot water filling is changed to a low temperature side set value (for example, 40 ° C.) lower than the threshold value (step 40). The process of lowering the target temperature for hot water filling corresponds to the flow state changing process for changing the flow state of the hot water so as to lower the temperatures of the bathtub return path 23 and the bathtub forward path 24 as hot water supply pipes.

  Then, the timer count is started, and when the set time elapses after the timer counts up, the drain discharge process is executed (steps 41 to 43). The process of step 43 corresponds to a full drain discharge process. After executing this drain discharge process, the hot water filling target temperature is returned to the set temperature and the hot water filling is continued (step 44).

  Thereafter, when the detected water level of the water level sensor 27 becomes equal to or higher than the set water level and the amount of hot water in the bathtub reaches the set hot water amount, combustion of the burner g1 is stopped, the hot water solenoid valve 32 is closed, and hot water supply is stopped (steps 45 and 46). . Next, the hot water temperature in the bathtub is determined based on the temperature detected by the return thermistor 28, and if the temperature detected by the return thermistor 28 is lower than the temperature set by the temperature setting switch 42, the chasing is executed (steps 47, 48, 49). . That is, the circulatory circulation pump 26 is operated to circulate hot water in the bathtub 5 through the bathtub return path 23 and the bathtub return path 24, and the detected temperature of the bathtub forward thermistor 31 is detected. The hot water is heated by the burner g2 in the memory operation part B so that the temperature becomes the temperature for memory (60 ° C.). When the detected temperature of the return thermistor 28 reaches the set temperature, the gas proportional valve 10 and the intermittent valve 11 are closed, the combustion of the burner g2 is stopped, the combustion fan 12 is stopped, and the tracking is finished. Then, the automatic operation is finished (steps 50 and 51).

  The hot water filling process performed when the automatic switch 38 is turned on in the state where there is no remaining hot water in the bathtub 5 is a long time after the process is started, as in the case of the chasing process by turning on the memorial switch 42. It is expected to end at. Therefore, in this embodiment, in addition to the hot water supply command by turning on the memory switch 42, the hot water supply command by turning on the automatic switch when there is no remaining hot water in the bathtub 5 corresponds to the long-time processing command. is doing.

[Third Embodiment]
Next, 3rd Embodiment of this invention is described based on drawing.
In the third embodiment, the specific process in the flow state changing process by the operation control unit is different from that of the second embodiment, and other configurations are the same as those of the second embodiment, so only the different configurations will be described. The description of the same configuration is omitted.

FIG. 8 and FIG. 9 show flowcharts of specific control operations of automatic bath control by the operation control unit in the third embodiment. As shown in this figure, when the automatic switch 38 is turned on and the set temperature for filling is over a threshold (45 ° C.), the preceding drain discharge process is executed prior to the filling process. Same as the second embodiment (steps 61 to 64)
.
If it is detected from the detection result of the water level sensor that there is no remaining hot water in the bathtub at that time, the burner g1 is ignited as in the second embodiment, and the hot water supply temperature detected by the hot water supply thermistor 16 is increased. The opening of the gas proportional valve 10 and the opening of the mixing valve 17 are adjusted so as to reach the target temperature, and the temperature-adjusted hot water is supplied to the bathtub 5 for filling (steps 65 and 66). ). At this time, the bath two-way valve 29 is opened, and the hot water filling is performed in a double-sided conveyance form in which the bath is supplied to the bathtub through both the bathtub return path 23 and the bathtub outbound path 24.

  During the filling of the hot water, the upper detection sensor 48 in the drain tank DT is switched from OFF to ON, and when it is detected that the drain is full or close to the drain tank DT, If the set temperature for tension does not exceed the threshold value (45 ° C.), the drain discharge process is executed immediately (steps 67, 68, 69). If the set temperature for hot water filling exceeds the threshold, the bath two-way valve 29 is closed, and the hot water filling is changed to a state in which the hot water filling is performed in a one-sided conveyance mode in which the hot water filling is supplied to the bathtub through only the bathtub outgoing path 24 (step). 70).

  The process of changing the conveyance mode in the hot water filling state corresponds to the flow state changing process of changing the flow state of the hot water so as to reduce the temperature of the bathtub return path 23 and the bathtub forward path 24 as hot water supply pipes. . When the explanation is added, if the hot water filling is performed in such a one-sided conveyance form, hot water that exceeds the threshold flows in the bathtub outgoing path 24, but hot water in the bathtub return path 23 flows. Since the temperature does not flow, the temperature decreases due to natural heat dissipation, and thus the temperature of the drain pipe 44 is prevented from increasing.

  Then, the timer count is started, and when the set time elapses after the timer counts up, the drain discharge process is executed (steps 71, 72, 73). This process corresponds to the interrupt drain discharge process. After this drain discharge process is executed, the transfer mode in the hot water filling state is returned to the double-sided transfer mode and the hot water filling is continued (step 74). Thereafter, the same processing as in the second embodiment is performed (steps 75 to 81).

[Fourth Embodiment]
Next, 4th Embodiment of this invention is described based on drawing.
FIG. 10 shows a hot water supply apparatus according to the fourth embodiment. In the fourth embodiment, as the hot water supply section, hot water supply operation section F having the same configuration as the hot water supply operation section A in the first embodiment and hot water for heating are circulated and supplied to the external heating device C. In addition, a hot water circulation operation unit E that circulates and supplies hot water for bath reheating is provided, and the configuration of the reheating heating unit for performing reheating is different from that of the first embodiment. However, the configuration of the control process by the operation control unit H3 as the control means provided in the hot water supply device P is the same as that in the first embodiment. Accordingly, only different configurations will be described here, and description of the same configurations will be omitted. In the figure, H2 is a control unit in the external heating device C, and R2 is a remote control device in the external heating device C. In the figure, R3 is a remote control device installed in the kitchen or the like, R4 is a remote control device installed in the bathroom, and 66 is an intermittent valve for intermittently supplying hot water to the external heating device C.

A hot water circulation water supply channel 51 for supplying water in the expansion tank 50 and a hot water circulation hot water supply channel 52 for supplying hot water after heating are connected to the operation unit E for hot water circulation. The hot water after the passage 52 is connected to the drying / heating heat exchanger 53 provided in the external heating device C and heat exchanged by the drying / heating heat exchanger 53 is expanded via the return passage 54 for circulating hot water. It is configured to be returned into the tank 50. The hot water circulation hot water supply passage 52 and the hot water circulation return passage 54 are connected via a bypass passage 55 in a state of bypassing the external heating device C, and the bypass passage 55 has a high temperature for reheating in the bathtub 5. A remedy heat exchanger 56 for supplying water and an on-off valve 57 for remedy are provided. In the hot water circulation water supply channel 51, water in the expansion tank 50 is sucked and supplied to the hot water circulation operation unit E, and hot water after heating is supplied to the external heating device C and the heat exchanger 56 for replenishment. The hot water circulation hot water supply path 52 is provided with a circulating hot water thermistor 59 for detecting the temperature of the hot water after heating.

  The reheating heat exchanger 56 in the reheating heater I is composed of a liquid heat exchanger, and the bathtub outgoing path 24 is inserted into the reheating heat exchanger 56 so that the hot water Heat exchange is performed between high-temperature water heated in the circulation operation unit E and circulated through the hot water circulation water supply channel 51 and the bypass channel 55 and hot water flowing in the bathtub outlet channel 24, The hot water flowing through the bathtub outbound path 24 is heated.

  Therefore, when the additional heating is started, when the external heating device C is performing the heating operation at that time, the hot water heated by the hot water circulation operation unit E is circulated through the hot water circulation water supply channel 51. Therefore, by opening the on / off valve 57 for chasing, chasing heating can be executed. In addition, when the additional heating is stopped, a process for closing the additional opening / closing valve 57 is executed. When the additional heating is started, if the external heating device C is not performing the heating operation, the process of circulating the hot water heated by the hot water circulation operation section E through the hot water circulation water supply channel 51 is started. Then, by opening the on-off valve 57 for chasing, chasing heating can be performed.

  In this embodiment, the configuration of the control processing by the operation control unit H3 is the same as that of the first embodiment. However, in the configuration shown in FIG. 10, the control operation performed in the second embodiment is performed. It may be configured to execute, or may be configured to execute the control operation performed in the third embodiment.

[Another embodiment]
Hereinafter, other embodiments are listed.

(1) In the said 1st Embodiment, when the said control means performs the reheating process as the said warm water supply process, after performing the process which act | operates the drain pump 45 last time and discharges drain, The amount of stored drain is estimated from the integrated value of the combustion amount (fuel supply amount) in each of the burners g1 and g2, and the amount stored in the drain tank DT is less than the set amount. However, instead of such a configuration, the following configuration may be used.

  Rather than obtaining the integrated value of the combustion amount (fuel supply amount), the difference between the incoming water temperature and the outgoing hot water temperature for the heat exchanger heated by each burner g1, g2 is measured, and the difference value You may obtain | require the product (output amount) of the operation time which the burner is burning, and estimate the quantity of the drain | drain stored from the value.

  Further, in place of the drain amount detecting means constituted by the upper detection sensor 48 and the lower detection sensor 48 as described above, the storage amount can be measured steplessly from the minimum value to the maximum value. It is good also as a structure which discriminate | determines whether the storage amount of the drain stored by the said storage part is less than setting amount based on the measurement result using an apparatus.

(2) In the said 1st Embodiment, when the said control means performs the reheating process as the said warm water supply process, it is estimated that the storage amount of the drain stored by the said storage part is less than setting amount. However, instead of such a configuration, when performing the hot water supply process, the storage of the drain stored in the storage unit is illustrated. The preceding drain discharge process may be executed without determining the amount.

(3) In the first embodiment, the reheating process is stopped as the flow state changing process, but instead of such a configuration, for example, hot water having a temperature lower than the threshold is used as a hot water outgoing path. You may make it supply through.

(4) In the second embodiment, the hot water filling target temperature is changed to a low temperature side set value lower than a threshold value as the flow state changing process. The tension supply may be temporarily stopped.

(5) In the first embodiment, as the temperature lowering process, the circulating flow of hot water is continued for a set time in a state where the reheating is stopped, but instead of such a configuration, for example, You may make it supply hot water of temperature lower than a threshold value through a warm water going way.

(6) In the first embodiment, the temperature after the preceding drain discharge process before the hot water supply process is executed, the flow state change process during the hot water supply process, and the hot water supply process are executed. Although each of the lowering processes is configured to be executed, only one of them may be executed, or any two of them may be selected and executed. Good.

(7) In each of the above embodiments, the hot water supply unit is exemplified by a configuration in which water supplied through a water supply channel is heated and supplied by a latent heat recovery type heat exchanger. The hot water storage hot water supply apparatus including a hot water storage tank and a heating boiler may be configured to store hot water blown out from the heating boiler as a drain.

Overall configuration diagram of heat source system Diagram showing drainage piping configuration Notched perspective view showing the arrangement of drain piping Flow chart of control operation Flowchart of control operation of the second embodiment Flowchart of control operation of the second embodiment Flowchart of control operation of the second embodiment Flowchart of control operation of the third embodiment Flowchart of control operation of the third embodiment Overall configuration diagram of heat source system of fourth embodiment

Explanation of symbols

23, 24 Hot water supply piping 45 Drain discharge means A, B, E, F Hot water supply section DK Drain amount detection means H1, H3 control means

Claims (9)

A hot water supply part that supplies hot water to the bathtub through a hot water supply pipe, a drain discharge means that discharges the drain that is generated in the hot water supply part and is stored in the storage part through the drain pipe, and a storage amount of drain in the storage part is detected. A drain amount detecting means, and a control means for controlling the operation of the hot water supply unit and the drain discharging means,
Based on a hot water supply command, the control means controls the operation of the hot water supply unit so as to supply heated hot water to the bathtub through the hot water supply pipe, and detection information of the drain amount detection means. When the drain is detected to be full or close to it, the drain is discharged when full to control the operation of the drain discharging means so that the drain is discharged.
A heat source system provided in a state where the hot water supply pipe and the drain pipe are housed in a common protective pipe,
When the control means executes the warm water supply process, a preceding drain discharge process for controlling the operation of the drain discharge means to discharge the drain stored in the storage unit prior to the warm water supply process. A heat source system that is configured to perform.   When the control means executes the hot water supply process, if the drain storage amount detected by the drain amount detection means is less than a set amount, or the drain storage amount stored in the storage unit The heat source system according to claim 1, wherein the preceding drain discharge process is not executed when it is predicted that is less than a set amount. A short-time processing command for instructing a hot water supply process that is predicted to end in a short time after the hot water supply command starts, and a hot water supply process that is predicted to end in a long time after the start Including long-time processing commands to command,
The control means is
When executing the hot water supply process in accordance with the long-time processing command, executing the preceding drain discharge process prior to the hot water supply process, and executing the hot water supply process in accordance with the short-time processing command The heat source system according to claim 1 or 2, wherein the preceding drain discharge process is not executed prior to the hot water supply process. The control means is
As the hot water supply process, a hot water treatment for supplying hot water heated to a hot water supply temperature for bath to the bathtub through the hot water supply pipe, and hot water heated to a temperature higher than the hot water supply temperature for the bath to the bathtub through the hot water supply pipe It is configured to perform a supply chase process, and
When the refilling process is executed, the preceding drain discharge process is performed prior to the refilling process, and when the hot water filling process is performed, the preceding drain discharge process is performed prior to the hot water filling process. The heat source system according to any one of claims 1 to 3, wherein the heat source system is configured not to operate. A hot water supply part that supplies hot water to the bathtub through a hot water supply pipe, a drain discharge means that discharges the drain that is generated in the hot water supply part and is stored in the storage part through the drain pipe, and a storage amount of drain in the storage part is detected. A drain amount detecting means, and a control means for controlling the operation of the hot water supply unit and the drain discharging means,
Based on a hot water supply command, the control means controls the operation of the hot water supply unit so as to supply heated hot water to the bathtub through the hot water supply pipe, and detection information of the drain amount detection means. When it is detected that the drain is full or close to it based on, it is configured to execute a full drain discharge process for controlling the operation of the drain discharge means to discharge the drain,
A heat source system provided in a state where the hot water supply pipe and the drain pipe are housed in a common protective pipe,
The control means is
When the hot water supply process is being executed, if it is detected that the drain is full or close to the state based on the detection information of the drain amount detection means, the hot water supply process is interrupted and the hot water supply is stopped. A heat source system configured to execute the full drain discharge process after executing a flow state changing process for changing a flow state of hot water supplied through the hot water supply pipe so as to lower a temperature of the hot pipe. The control means is
The heat source system according to claim 5, wherein the flow state changing process is configured to reduce a temperature of hot water supplied to the bathtub through the hot water supply pipe. The control means is
As the hot water supply process, a hot water treatment for supplying hot water heated to a hot water supply temperature for bath to the bathtub through the hot water supply pipe, and hot water heated to a temperature higher than the hot water supply temperature for the bath to the bathtub through the hot water supply pipe It is configured to perform a supply chase process, and
When it is detected that the drain is full or close to the state based on the detection information of the drain amount detection means while the refilling process is being performed, the full-drain drain is performed after the flow state changing process is performed. Configured to perform the discharge process,
When the hot water filling process is performed, if it is detected that the drain is full or close to the state based on the detection information of the drain amount detecting means, the full drain discharge is performed without executing the flow state changing process. The heat source system according to claim 5 or 6, wherein the heat source system is configured to perform processing. A hot water supply part that supplies hot water to the bathtub through a hot water supply pipe, a drain discharge means that discharges the drain that is generated in the hot water supply part and is stored in the storage part through the drain pipe, and a storage amount of drain in the storage part is detected. A drain amount detecting means, and a control means for controlling the operation of the hot water supply unit and the drain discharging means,
Based on a hot water supply command, the control means controls the operation of the hot water supply unit so as to supply heated hot water to the bathtub through the hot water supply pipe, and detection information of the drain amount detection means. When the drain is detected to be full or close to the drain, it is configured to execute a full drain discharge process for controlling the operation of the drain discharge means to discharge the drain.
A heat source system provided in a state where the hot water supply pipe and the drain pipe are housed in a common protective pipe,
The control means is
After the execution of the hot water supply process, the hot water when the hot water supply process is executed so as to lower the temperature of the hot water supply pipe so as to suppress the temperature rise of the drain discharged through the drain pipe . A heat source system configured to execute a temperature reduction process for supplying hot water having a temperature lower than the temperature through the hot water supply pipe. The control means is
As the hot water supply process, a hot water treatment for supplying hot water heated to a hot water supply temperature for bath to the bathtub through the hot water supply pipe, and hot water heated to a temperature higher than the hot water supply temperature for the bath to the bathtub through the hot water supply pipe It is configured to perform a supply chase process, and
9. The temperature lowering process is executed after finishing the chasing process, and the temperature lowering process is not executed after the hot water filling process is finished. The heat source system according to item.

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