JP2016194407A - Heat source system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress waste of water by preventing hot water/water of a temperature remarkably lower than a set temperature from being discharged from a water supply source.SOLUTION: Hot water is prepared by hot water supply heat exchangers 4, 6 in a heat source machine 2, and the hot water is supplied to one or more hot water supply destinations through a hot water supply passage 9. A tip end side of a connection passage 36 connected to a hot water supply-side position of the hot water supply passage 9 laid from the heat source machine 2 to the external through a header 24, is connected to a reheating circulation passage 15 connected to a bathtub 14. A valve and breaking-off means are disposed on the connection passage 36. Water lead-out control means is disposed to make sacrifice water pass from the hot water supply passage 9 to the connection passage 36 and be led out to the bathtub 14 through the reheating circulation passage 15, in receiving a sacrifice water tapping prevention command for preventing the sacrifice water of low temperature accumulated in the hot water supply passage 9 from the heat source machine 2 to the header 24, from being tapped from the hot water supply source, and to stop the lead-out of the water to the bathtub 14 from the hot water supply passage 9 in receiving a lead-out stop command to the bathtub 14 of the sacrifice water.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat source system capable of saving energy with a simple configuration and capable of retaining water in the event of a power failure due to a disaster or the like.

  FIG. 4 schematically shows a configuration example of a heat source system including a heat source machine (heat source device) 2. In the figure, a combustion chamber 61 is provided in the appliance case 60, and a hot water supply side burner 1 (1 a, 1 b, 1 c) and a hot water reheating burner 7 in the bathtub 14 are provided in the combustion chamber 61. Has been placed. These burners 1 and 7 are connected to gas pipes 55 for supplying fuel to the respective burners 1 and 7. The gas pipes 55 are used to control fuel supply / stop to the burners 1 and 7. On-off valves 51, 52, and 53, and a proportional valve 54 that can control the amount of fuel supplied to the burner 1 with the valve opening are interposed.

  A combustion fan 5 for supplying and exhausting the combustion of the burners 1 and 7 is provided below the burners 1 and 7, and the combustion fan 5 rotates through an intake port (not shown). Then, the air sucked from the outside is sent to the burners 1 and 7, and burner combustion is performed by this air and the gas supplied through the gas pipe 55. Combustion gas generated by burner combustion passes through the combustion chamber 2 and is exhausted from an exhaust port (not shown).

  Two hot water supply heat exchangers 4 and 6 are provided above the hot water supply side burner 1. The hot water supply heat exchanger 4 is a main hot water supply heat exchanger (primary hot water supply heat exchanger) that recovers sensible heat in the combustion gas of the burner 1, and the main hot water supply heat exchanger 4 includes a plurality of plate-like fins. 3 is formed. The hot water supply heat exchanger 6 is provided on the downstream side of the flow of the combustion gas with respect to the main hot water supply heat exchanger 4, and a latent heat recovery hot water supply heat exchanger (secondary heat recovery) that recovers sensible heat and latent heat of the combustion gas. Hot water supply heat exchanger).

  A water supply passage 8 for introducing water from a water supply source is connected to the inlet side of the latent heat recovery hot water supply heat exchanger 6, and the main hot water supply heat exchanger 4 is connected to the outlet side of the latent heat recovery hot water supply heat exchanger 6. The entrance side of is connected. A hot water supply passage 9 is connected to the outlet side of the main hot water supply heat exchanger 4, and the hot water supply passage 9 is laid outside from the heat source machine, and a header 24 is provided at a position on the hot water supply side. Yes.

  There is formed a hot water supply circuit having hot water supply passage 8, hot water supply heat exchangers 4 and 6, and hot water supply passage 9, and supplying hot water heated by hot water supply heat exchangers 4 and 6 to one or more hot water supply destinations. In this example, the water passing through the latent heat recovery hot water supply heat exchanger 6 is preheated with the heat of latent heat recovery, and the preheated water is supplied to the water inlet of the main hot water supply heat exchanger 4. Hot water heated by the hot water supply heat exchanger 4 is sent to the hot water supply destination 9 through the hot water supply path 9. In addition, efficient heating can be performed by providing the hot water heat exchanger 6 for recovering latent heat.

  The water supply passage 8 has a flow rate sensor (flow sensor) 10 for detecting the flow rate of water supplied from the water supply passage 8 and flowing into the latent heat recovery hot water supply heat exchanger 6, water amount control valves 11 and 56, and latent heat recovery. An incoming water thermistor (not shown) for detecting the incoming water temperature of the water flowing into the hot water supply heat exchanger 6 is provided. The hot water supply passage 9 is provided with a hot water thermistor 19 that can detect the temperature of hot water flowing out. The hot water supply passage 9 and the water supply passage 8 are connected to each other via a pipe 12 and a water amount control valve 11. ing.

  Further, a reheating heat exchanger 13 for reheating the bath water is provided above the reheating burner 7, and this reheating heat exchanger 13 is connected to the bathtub 14 to circulate the bath water. The recirculation circulation passage 15 is provided as a hot water circulation passage. In this example, the reheating heat exchanger 13 is also a main heat exchanger 13a that recovers sensible heat of the combustion gas of the burner 7, and a latent heat recovery heat exchanger 13b that recovers sensible heat and latent heat in the combustion gas. The main heat exchanger 13a has a plurality of plate-like fins 3 and is formed.

  The recirculation circulation passage 15 has an outward pipe 16 that leads to the bathtub 14, a return pipe 17 from the bathtub 14, and a pipeline 21. One end side of the pipe line 21 is connected to the reheating heat exchanger 13, and the other end side of the pipe line 21 is connected to the discharge port side of the circulation pump 23 that circulates the bath water. The pipe 21 includes a water level sensor 25 that detects a water level of the bathtub 14 by water pressure, a water flow switch 26 that is turned on when it is detected that water has flowed through the pipe 21, and the temperature of the bathtub hot water. A bath temperature sensor (not shown) for detection is provided. A return pipe 17 is connected to the suction port side of the circulation pump 23, and one end side of a pouring channel 27 is connected to the return pipe 17. The pouring passage 27 is provided with an edge cutting structure 35 including a check valve and a pouring electromagnetic valve 29, and the other end of the pouring passage 27 is connected to the hot water supply passage 9.

  Below the latent heat recovery hot water supply heat exchanger 6, a drain recovery means 31 for recovering drain generated in the latent heat recovery hot water supply heat exchanger 6, and a drain for storing the drain recovered by the drain recovery means 31 A tank 32 is provided. The drain collecting means 31 and the drain tank 32 are connected via a drain pipe 33. One end side of a pipe line 59 is connected to the lower side of the drain tank 32, and the other end side of the pipe line 59 is connected to a drain port. It is connected. The drain is acidic because it contains nitrogen oxides (NOx) and the like in the combustion gas. Therefore, the drain tank 32 contains a drain tank (for example, calcium carbonate) for neutralizing drain drainage (drain). Sum means are provided.

  In the heat source unit 2, operations such as a hot water supply function to the kitchen, hot water filling to the bathtub 14, additional hot water, additional water, reheating of the hot water in the bathtub, drain drain function, drain cleaning function, etc. (Not shown) is performed in accordance with a sequence program given in advance, and a remote control device (not shown) is signal-connected to the control device.

  The control device is provided with combustion control means. Hereinafter, an example of hot water supply operation based on the control of the combustion control means will be briefly described. The hot water supply operation is started by opening the hot water tap 18 provided at the distal end side of the distal end passage 9a of the hot water passage 9 (by turning a knob or operating a lever) in a kitchen, a washroom, a bathroom, or the like. When the flow rate sensor 10 detects a flow rate equal to or higher than the minimum operating flow rate through which the water supply passage 8 is passed, the hot water supply side burner 1 is burned by the control of the combustion control means, and the hot water supply heat exchangers 4 and 6 (main The water passing through the hot water supply heat exchanger 4 and the latent heat recovery hot water supply heat exchanger 6) is heated to create hot water, and the hot water is discharged through the hot water supply passage 9 as shown by the arrows in FIG. 4 and supplied to the hot water supply destination. To do.

  In the operation of this hot water supply function, the combustion control means includes the incoming water temperature detected by the incoming water thermistor, the amount of hot water detected by the flow sensor 10, and the hot water temperature (outlet temperature) detected by the hot water thermistor 19. Based on the detection information, the amount of gas supplied from the gas pipe 55 is controlled by the valve opening amount of the proportional valve 114 so that the hot water supply set temperature is reached. The hot water supply operation is terminated when the hot water tap 18 is closed. That is, when the flow rate sensor 10 detects the stop of water flow by closing the hot water tap 18, the combustion control device shuts off the gas supply to the hot water supply side burner 1 and stops the combustion of the hot water supply side burner 1.

  The operation of the automatic hot water filling function is started when the user or the like turns on the automatic switch of the remote control device. At the start of the automatic hot water filling operation, the circulation pump 23 is driven, and the remaining water is stored in the bathtub 14. Depending on whether or not there is, a hot water filling is performed in the bathtub 14 in accordance with a different sequence program. It should be noted that various sequence programs can be applied for the hot water filling operation, and detailed description thereof is omitted. In any case, the hot water solenoid valve 29 is opened and the hot water supplying function is performed. Similar to the operation, the water passing through the hot water supply heat exchangers 4 and 6 is heated by the combustion heating of the burner 1, and the hot water is passed from the hot water supply passage 9 to the pouring passage 27 and dropped into the bathtub 14 through the recirculation circulation passage 15. I do.

  When hot water filling is started, the water level of the bathtub 14 is detected by the water level sensor 25, and when the detected water level reaches the preset water level of the bathtub set in advance, the pouring water and reheating control means 42 is poured. The hot water solenoid valve 29 is closed to end the hot water filling operation. In this hot water filling operation, combustion control of the burner 1 is performed so that the hot water hot water set temperature is set in advance, and the hot water temperature of the hot water supply heat exchangers 4 and 6 is controlled.

  Usually, the operation of the heat retaining function is performed for a predetermined time (for example, 4 hours) following the automatic hot water filling operation (the operation of hot water filling the bathtub 14). The operation of the heat retention function is to start the circulation pump 23 for a short time at a predetermined time interval, replenish the hot water in the bathtub 14 and circulate it through the circulation passage 15, while the hot water temperature (not shown) of the bathtub 14 ( This is done by detecting the bath temperature. When the detected temperature falls outside the allowable range below the set temperature of the bath, the circulating pump 23 is driven to replenish hot water in the bathtub 14 and circulate through the circulation passage 15 to detect the temperature detected by the bath temperature sensor. Is heated by the reheating heat exchanger 13 by the combustion of the burner 7 on the reheating side until the set temperature of the bath is reached, and the temperature of the bathtub hot water is kept by performing the reheating operation.

  Further, when the reheating switch provided in the remote control device is manually operated, the same control as the reheating operation at the time of the automatic hot water filling operation is performed. .

JP 2006-343056 A JP 2004-308980 A JP 2002-61239 A JP 2012-88012 A Japanese Patent Laid-Open No. 7-305859 JP 2000-39166 A Japanese Patent Laid-Open No. 2003-90611 JP-A-8-178327 JP 2002-162114 A CD-ROM of actual application No. 05-60899 (No. 7-30902)

  By the way, when hot water is supplied after a lapse of time from the end of the previous hot water supply, cold water staying in the hot water supply passage 9 from the heat source unit 2 to the hot water supply destination (cold water considerably lower than the set temperature of the hot water supply) is produced. As a result, there is a problem that the user feels uncomfortable. In addition, since many users try to use hot water after cold water comes out, they throw away the water coming out of the hot water supply before hot water near the set temperature comes out, so this water is wasted.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat source system that can suppress waste of water with a simple configuration and is easy to use.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the first invention includes at least one hot water supply heat exchanger provided in the heat source apparatus, a water supply passage for supplying water to the hot water heat exchanger, and hot water heated by the hot water heat exchanger. A hot water supply circuit having a hot water supply passage for supplying hot water to a hot water supply destination, having a hot water circulation passage connected to the bathtub and circulating the hot water in the bathtub, and connected to a hot water supply side position of the hot water supply passage laid outside from the heat source machine A valve that closes the connection passage when the water flow is stopped, and opens the connection passage when water flows from the hot water supply passage side to the hot water circulation passage. And an edge cutting means for preventing back flow of hot water from the hot water circulation passage side to the hot water supply passage, and stays in the hot water supply passage from the heat source unit to the connection portion of the connection passage to the hot water supply passage. More than the set temperature of the hot water supply When a waste water discharge prevention command for preventing waste water having a low temperature exceeding a predetermined allowable range from coming out of the hot water supply destination is received, the waste water is removed from the hot water supply passage through the connection passage. Waste water derivation control means is provided for stopping the derivation of water from the hot water supply passage to the hot water circulation passage when it is led to the hot water circulation passage and receives a command to stop derivation of the waste water to the hot water circulation passage. The structure is a means to solve the problem.

  In addition to the configuration of the first invention, the second invention solves the problem with a configuration in which the valve and the edge cutting means provided in the connection passage are integrally connected to form a unit structure. As a means.

  Furthermore, the third invention has a derived water temperature detecting means for detecting the temperature of the water led out to the hot water circulation passage through the connection passage in addition to the configuration of the first or second invention, Stoppage of wastewater into the hot water circulation passage when the detected temperature detected by the water temperature detection means reaches a set temperature of the hot water supply or a temperature lower than the set temperature by a predetermined temperature difference within an allowable range. A waste water derivation stop command transmission means for transmitting a command is provided.

  Furthermore, the fourth invention has a derived water temperature detecting means for detecting the temperature of water led out to the hot water circulation passage through the connection passage in addition to the configuration of the first or second invention, A required time required for the detected temperature detected by the derived water temperature detecting means to reach the set temperature of the hot water supply after receiving the discharge prevention hot water discharge command is obtained in advance, and obtained by a predetermined calculation method based on the required time. And a waste water derivation stop command transmission means for transmitting a derivation stop command to the hot water circulation passage when the calculated time less than the required time has elapsed.

  Furthermore, in addition to the configuration of the first or second invention, the fifth invention detects the flow rate of waste water led out to the hot water circulation passage side from the heat source device through the hot water supply passage and the connection passage. A flow rate detection means, and a derived water temperature detection means for detecting the temperature of the water led out to the hot water circulation passage through the connection passage. The time required for the detected temperature to reach the set temperature of the hot water supply is obtained, and the discharge water temperature detecting means is received after receiving the discarded water discharge prevention hot water discharge command based on the required time and the flow rate detected by the flow rate detecting means. The amount of water passing through the hot water supply passage and the connection passage is determined in advance until the detected temperature detected by the hot water reaches the set temperature of the hot water supply, and the calculation method is determined in advance based on the amount of passing water. When it is determined based on the detected flow rate of the flow rate detecting means that the calculated amount of water less than the passing water amount passed through the hot water supply passage and the connection passage, the waste water is led to the hot water circulation passage. Waste water derivation stop command transmission means for transmitting a stop command is provided.

  Further, in a sixth aspect of the invention, in addition to the configuration of any one of the first to fifth aspects, a remote control device disposed at a hot water supply destination is signal-connected to the heat source device, and the remote control device Includes a waste water discharge prevention command output operation unit for outputting a waste water discharge prevention command, and hot water of the set temperature from the hot water supply destination or the set temperature when the discharge operation of the waste water to the hot water circulation passage is stopped. It is characterized in that at least one of informing means for informing that hot water at a near temperature can be discharged is provided.

  Further, the seventh invention is the configuration of any one of the third to sixth inventions, the valve and edge cutting means provided in the connection passage, a derived water temperature detecting means, and a discarded water derivation stop command. A waste water derivation preventing unit is provided that has a transmission means and a waste water derivation control means, and prevents the waste water from coming out of the hot water supply destination.

  Furthermore, in an eighth aspect of the invention, in addition to the configuration of any one of the first to seventh aspects of the invention, a header is provided at a connection portion between the hot water supply passage and the connection passage. One or more hot water supply front end side passages for guiding hot water to a hot water supply destination are connected to the connection passage.

  Furthermore, in addition to the configurations of the first to eighth inventions, the ninth invention detects the elapsed time from the end of the previous hot water supply when receiving the discarded water discharge prevention command, and the detection time is predetermined. In addition, waste water derivation operation canceling means for canceling the derivation operation of the waste water to the hot water circulation passage by the waste water derivation control means is provided when it is within the cancellation reference time.

  According to the present invention, the hot water supply circuit having the hot water supply passage for supplying the hot water formed by heating to one or more hot water supply destinations is connected to the hot water supply side of the hot water supply passage laid outside from the heat source machine. The tip side is connected to a hot water circulation passage connected to the bathtub, and is determined in advance from a set temperature of hot water staying in a passage from the heat source unit to a connection portion of the connection passage to the hot water supply passage. When the waste water derivation control means receives a waste water discharge prevention command for preventing waste water having a low temperature exceeding the allowable range from coming out of the hot water supply destination, the waste water is connected to the hot water passage from the hot water passage. Since it leads to the hot water circulation passage through the passage, it is possible to prevent waste water having a low temperature from being supplied from the hot water supply passage to the hot water supply destination.

  In addition, since the waste water is led out to the hot water circulation passage, for example, by leading it to the bathtub from the hot water circulation passage and closing the stopper of the bathtub, the waste water can be stored in the bathtub. It can be used as a stored water for bathing and can also be used for bathing by chasing it. The waste water derivation control means stops the derivation of water from the hot water supply passage to the hot water circulation passage when an instruction to stop the discharge of the waste water to the hot water circulation passage is received, so that the waste water is discharged at an appropriate timing. It is possible to stop the derivation of water from the hot water supply passage to the hot water circulation passage and then supply hot water at a set temperature or in the vicinity thereof to the hot water supply destination.

  Further, a derived water temperature detecting means for detecting the temperature of the water led out to the hot water circulation passage through the connection passage is provided, and the detected temperature detected by the derived water temperature detecting means is higher than the set temperature of the hot water supply or the set temperature. By providing a waste water derivation stop command transmission means for transmitting a derivation stop command to the hot water circulation passage when waste water reaches a temperature lower by a predetermined set temperature difference within an allowable range, The water staying in the passage of the connection passage leading to the hot water supply passage is completely led out to the hot water circulation passage and is replaced with the set temperature heated by the heat source machine or hot water near the set temperature to detect the derived water temperature. After reaching the arrangement position of the means, a discharge stop command to the hot water circulation passage of waste water can be transmitted. Therefore, by stopping the discharge of the discarded water to the hot water circulation passage at this timing, the hot water at the set temperature or in the vicinity thereof can be reliably discharged from the hot water supply destination.

  Further, the remote control device provided at the hot water supply destination is connected to the heat source device, and the wastewater discharge prevention command output operation unit for outputting the wastewater discharge prevention command is provided in the remote control device. By operating the discharge prevention command output operation section, it is possible to output a discarded water discharge prevention command easily and at a suitable timing when the user tries to start hot water supply, and to guide the discarded water to the hot water circulation passage. it can

  In addition, when the operation of deriving waste water to the hot water circulation passage is stopped, a remote control device is provided for notifying that the hot water at the set temperature or the hot water at a temperature near the set temperature can be discharged from the hot water supply destination. By providing and notifying the user, after the waste water is led out to the hot water circulation passage, the user opens the hot water tap by operating the operation lever provided at the hot water supply destination or rotating the operation knob. The hot water at or near the set temperature is immediately discharged. Therefore, the usability of the heat source machine can be further improved.

  Furthermore, a derived water temperature detecting means for detecting the temperature of the water led out to the hot water circulation passage through the connection passage is provided, and the detected temperature detected by the derived water temperature detecting means receives a discarded water discharge prevention hot water discharge command. The required time required for the hot water to reach the set temperature of the hot water supply is obtained in advance, and the hot water circulation of the waste water when the calculation time less than the required time obtained by a predetermined calculation method based on the required time has elapsed. By providing the wastewater derivation stop command transmission means for transmitting the derivation stop command to the passage, the following effects can be obtained.

  That is, the water staying in the passage from the heat source device to the connection portion of the connection passage to the hot water supply passage is led out to the hot water circulation passage side and replaced with the set temperature heated by the heat source device or hot water near the set temperature. When the discharge stop command to the hot water circulation passage is transmitted after reaching the position where the derived water temperature detecting means is reached, the water passes through the connection passage to the connection portion with the connection passage of the hot water supply passage. After water reaches the set temperature or a temperature in the vicinity thereof, a discharge stop command for the waste water to the hot water circulation passage is transmitted, so the interval between the heat source machine and the connection portion of the connection passage to the hot water supply passage Even after the staying waste water is led out to the hot water circulation passage, the water is led out to the hot water circulation passage, and water is further led to the hot water circulation passage. On the other hand, the calculation time calculated by a predetermined calculation method in which the detection temperature detected by the derived water temperature detection means is less than the time required to reach the set temperature of the hot water supply after receiving the discarded water discharge prevention hot water discharge command. By sending a discharge stop command to the hot water circulation passage when waste water has passed, it is possible to prevent water from being excessively led to the hot water circulation passage as described above, and to discard waste water into the hot water water. It is also possible to shorten the time from the hot water supply destination to the start of hot water after being led out to the circulation passage.

  Note that the calculation method is, for example, by calculating to 1 / N of the required time (N is a positive integer), such as setting the time to 1/2 of the required time or 1/3 of the required time. The method can be determined. When the tip of the connection passage is connected to the hot water circulation passage at a position in the vicinity of the heat source unit, the piping distance from the heat source unit of the hot water supply passage to the connection passage connection portion and the piping distance of the connection passage (that is, from the connection portion to the hot water passage to the hot water) Since the distance to the circulation path) is almost equal, N is 2. Further, the calculation method may be a method of obtaining by calculation such as required time-A seconds (A is a positive real number, for example, 20).

  However, in the hot water supply passage, the length between the connection portion to which the connection passage is connected and the heat source machine and the length of the connection passage are different for each installation of the heat source machine, and thus are calculated by a predetermined calculation method. When the calculation time has elapsed and a command to stop the discharge of waste water to the hot water circulation passage is sent, the calculation time is too short, and the inside of the hot water supply passage from the heat source unit to the connection to the hot water supply passage of the connection passage The water staying in the water is not completely replaced with the set temperature heated by the heat source unit or the hot water near the set temperature, and when the hot water tap is opened in that state, it is considerably lower than the set temperature from the hot water supply destination. Temperature water may come out.

  Therefore, for example, when trial operation of the heat source machine is made, when the hot water tap is opened by sending a discharge stop command to the hot water circulation passage immediately after the time obtained by calculating the required time-A seconds, the hot water supply destination is set. Check if water with a temperature considerably lower than the temperature comes out, and if water with a temperature much lower than the set temperature comes out, provide an operation unit that operates to reduce the value of A, A command transmission operation unit is provided to give a command to the heat source system side so that the value of A can be changed by this operation unit, or to reduce the value of A, and when the command transmission operation unit is operated, the heat source The system side automatically changes the value of A based on a predetermined condition (for example, a condition that the value of A is reduced by 5 [seconds] every time the command transmission operation unit is operated). It may be. Further, the value of A may be changed according to the season (according to the incoming water temperature).

  Furthermore, a flow rate detecting means for detecting the flow rate of waste water led out from the heat source device to the hot water circulation passage side through the hot water supply passage and the connection passage, and the temperature of the water led out to the hot water circulation passage through the connection passage The temperature of the detected water detected by the temperature of the derived water temperature detection means passes through the hot water supply passage and the connection passage until the temperature reaches the set temperature of the hot water supply after receiving the water discharge prevention hot water discharge command. A flow amount of water passing through the hot water supply passage and the connection passage is obtained in advance, and a calculated amount of water less than the passage water amount obtained by a predetermined calculation method based on the passage water amount passes through the hot water supply passage and the connection passage. By providing waste water derivation stop command transmitting means for transmitting a discharge stop command to the hot water circulation passage when waste water is judged based on the detection flow rate of the detection means, the following effects can be obtained. Can.

  That is, also in this case, until the water passing through the passage leading to the connection portion with the connection passage of the hot water supply passage and the water passing through the connection passage reaches the set temperature or a temperature in the vicinity thereof after receiving the discarded water discharge prevention hot water discharge command. When it is determined that water of a calculated flow rate calculated by a predetermined calculation method that is less than the amount of water passing through the hot water supply passage and the connection passage passes through the hot water supply passage and the connection passage, By sending out a derivation stop command to the circulation passage, it is possible to prevent water from being led to the hot water circulation passage in the same manner as described above, and from the hot water supply destination after the waste water is led to the hot water circulation passage. It is also possible to shorten the time until the start of pouring.

  In addition, the calculation method is, for example, by calculating to 1 / N (N is a positive integer) such as 1/2 of the water passing water amount or 1/3 of the water passing water amount. The method can be determined. When the tip of the connection passage is connected to the hot water circulation passage at a position in the vicinity of the heat source unit, the piping distance from the heat source unit of the hot water supply passage to the connection passage connection portion and the piping distance of the connection passage (that is, from the connection portion to the hot water passage to the hot water) Since the distance to the circulation path) is almost equal, N is 2. Further, the calculation method may be a method of obtaining by calculation such as passing water amount-B liter (B is a positive real number, for example, 1).

  Also in this case, similarly to the above, even when the water of the calculated flow rate calculated by a predetermined calculation method has elapsed, the water staying in the hot water supply passage from the heat source device to the connection portion of the connection passage to the hot water supply passage. Is not completely replaced with the set temperature heated by the heat source machine or the hot water near the set temperature, and when the hot water tap is opened in that state, water at a temperature considerably lower than the set temperature comes out from the hot water supply destination. Since there is a possibility, the calculation method may be configured to be variable at the time of trial operation of the heat source device, for example.

  For example, immediately after it is determined that the amount of water obtained by calculating the amount of water passing through-B liters has passed during the trial operation of the heat source unit, a discharge stop command to the hot water circulation passage is sent and the hot water tap is opened. If the water temperature is considerably lower than the set temperature from the hot water supply destination, and if water with a temperature much lower than the set temperature appears, operate to reduce the B value. An operation unit is provided, and the value of B can be changed by the operation unit, or a command transmission operation unit for giving a command to the heat source system side so as to reduce the value of B is provided. When the operation is performed, the heat source system side determines the value of B based on a predetermined condition (for example, a condition in which the value of B is reduced by 0.5 liter every time the command transmission operation unit is operated). Automatically It may be or to be further. Further, the value of B may be changed according to the season and the incoming water temperature.

  Further, the valve and edge cutting means provided in the connection passage, a derived water temperature detecting means, a discarded water derivation stop command transmitting means, and a discarded water derivation control means are provided to prevent the discarded water from leaving the hot water supply destination. By forming a wastewater lead-out prevention unit, this unit can be easily handled and easily connected to the recirculation circulation passage, and if necessary, connected to a heat source machine or remote control device, a heat source system The configuration of can be refreshed.

  Furthermore, a header is provided at a connection portion between the hot water supply passage and the connection passage, and the connection passage is connected to the header by connecting one or more hot water supply tip side passages that guide hot water from the header to the hot water supply destination and the connection passage. The connection to the hot water supply passage can be made very easily.

  Furthermore, when the elapsed time from the end of the previous hot water supply is short, the temperature of the hot water in the hot water supply passage does not drop significantly, and it may be the set temperature of the hot water supply or a temperature in the vicinity thereof. Elapsed time from the end of the previous hot water supply when a time is set in advance as a cancellation reference time when hot water at the set temperature of the hot water supply or a temperature near it is discharged from the hot water supply destination. When the detection time is within the cancellation reference time, the waste water derivation operation canceling means for canceling the derivation operation of the waste water to the hot water circulation passage by the waste water derivation control means is provided, so that It is not necessary to lead water of temperature to the hot water circulation passage side. Therefore, when the elapsed time from the end of the previous hot water supply is within the cancellation reference time, the derivation operation of the water to the hot water circulation passage side can be omitted, and the set temperature or a temperature in the vicinity thereof is immediately from the hot water supply destination. You can tap out hot water.

It is a system configuration figure showing typically one example of the heat source system concerning the present invention. It is a block diagram which shows the control structure of the heat source system of an Example. It is sectional explanatory drawing which shows the structural example of the edge cutting means provided in the heat source system of an Example. It is explanatory drawing which shows the structural example of the conventional heat source apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment, the same components as those in the conventional example are denoted by the same reference numerals, and redundant description thereof is omitted or simplified.

  FIG. 1 schematically shows a configuration of an embodiment of a heat source system according to the present invention. As shown in the figure, the heat source system of this embodiment has the same heat source unit 2 as the system shown in FIG. 4, but in this embodiment, a connection passage 36 is connected to the header 24, The distal end side of the connection passage 36 is connected to the recirculation circulation passage 15 via the switching valves 62 and 63, and the waste water derivation unit 34 including the changeover valves 62 and 63 is connected to the connection passage 36 and the recirculation circulation passage 15. It is provided in the connection part.

  In this embodiment, according to this configuration, water passing through the hot water supply passage 9 can be led out to the recirculation passage 15 side and led out to the bathtub 14 side as necessary. By not throwing away the waste water, the waste of water is eliminated and the water can be used for disasters and bathing.

  The waste water derivation unit 34 is disposed on the lower side of the heat source unit 2 in the vicinity of the heat source unit 2, for example, and as shown in FIG. 2, the control device 43, the derived water temperature detection means 47, and the switching valves 62 and 63. have. The controller 43 is provided with waste water derivation control means 44, waste water derivation stop command transmission means 45, and waste water derivation operation cancellation means 46. The control device 43 is signal-connected to the control device 40 of the heat source device 2 and is signal-connected to the remote control device 50 via the control device 40. The control device 40 is provided with a signal relay means 41 and a combustion control means 42, and the remote control device 50 is provided with a notification means 48 and a discarded water discharge prevention command output operation section 49.

  The waste water derivation control means 44 is determined in advance from a set temperature of hot water that stays in the hot water supply passage 9 from the heat source device 2 to the hot water supply passage 9 of the connection passage 36 to the hot water supply passage 9 (here, the header 24). When a waste water discharge prevention command is received to prevent waste water having a low temperature exceeding an allowable range (for example, 2 ° C.) from flowing out of the hot water supply destination, the switching valves 62 and 63 are switched to supply the waste water to the hot water supply passage. 9 to the recirculation circulation passage 15 via the connection passage 36 and the switching valves 62 and 63 (for example, through the forward pipe 16a and the return pipe 17a) and the lead to the bathtub 14 (normally, the connection passage 36 and the follow-up passage 17a). It is configured in such a manner that the fired circulation passage 15 is not connected).

  In this embodiment, the discarded water discharge prevention command is transmitted when the user operates the discarded water discharge prevention command output operation unit 49 of the remote control device 50 disposed at the hot water supply destination. The discarded water discharge prevention command output operation unit 49 is an operation means for outputting (transmitting) a discarded water discharge prevention command, and is formed by an immediate hot water button provided in the remote control device 50, for example. In this case, when the immediate hot water button is turned on, a waste water discharge prevention command is transmitted. The transmitted discarded water discharge prevention command is applied to the discarded water derivation control means 44 via the signal relay means 41 of the heat source device 2.

  Further, the waste water discharge prevention command is also applied to the combustion control means 42. When the waste water discharge prevention command is added, the combustion control means 42 performs combustion of the burner 1 in the same manner as in the hot water supply operation, thereby supplying hot water. The water in the hot water supply passage 9 from the heat source device 2 to the header 24 is discarded before the hot water is formed (before the temperature of the hot water reaches a temperature near the set temperature). Under the control of the water derivation control means 44, the water is introduced into the recirculation circulation passage 15 through the connection passage 36 and is introduced into the bathtub 14. The combustion control means 42 performs the combustion control related to the operation of the heat source unit 2 as described in the conventional example, including the hot water supply operation, but detailed description thereof is omitted.

  The derived water temperature detecting means 47 is formed by a temperature sensor that detects the temperature of the water led out to the recirculation circulation passage 15 via the connection passage 36.

  The waste water derivation stop command transmission means 45 transmits a derivation stop command to the hot water circulation passage (reheating circulation passage 15) of the waste water, for example, at the timing described below. That is, the waste water derivation stop command transmission means 45 detects the detected temperature detected by the derivation water temperature detection means 47 after receiving a waste water discharge prevention hot water discharge command, for example, according to an operation at the time of a trial run by the contractor of the heat source device 2. The required time required to reach the set temperature of the hot water supply is obtained in advance, and when the calculated time less than the required time obtained by a calculation method determined in advance based on the required time has elapsed, the hot water circulation passage for the waste water Send out a derivation stop command. The calculation method may be, for example, a calculation of 1 / N of the required time (N is a positive integer, usually 2). That is, in the present embodiment, the tip end of the connection passage 36 is connected to the recirculation circulation passage 15 in the vicinity of the heat source device 2, so that the piping distance from the heat source device 2 to the header 24 in the hot water supply passage 9 and the header Since the piping distance of the connection passage 36 from 24 to the recirculation circulation passage 15 is substantially equal, N is 2.

  The wastewater derivation stop command transmission means 45 can also set the calculation method to the required time−A seconds (A is a positive real number, for example, 20). Further, the waste water derivation stop command transmission means 45 can also transmit a derivation stop command to the hot water circulation passage of waste water as follows.

  That is, the flow rate of the waste water led out from the heat source device 2 through the hot water supply passage 9 and the connection passage 36 to the recirculation passage 15 is detected by the flow sensor (flow rate detection means) 10, and the detection result is discarded. The water derivation stop command transmission means 45 receives the signal via the signal relay means 41 every moment or at a predetermined timing. Then, for example, according to the operation of the heat source machine 2 during the trial run, the water that is led out to the recirculation circulation passage 15 through the connection passage 36 after receiving the reception result and the waste water discharge prevention hot water discharge command. Based on the time required for the temperature (temperature detected by the derived water temperature detecting means 47) to reach the set temperature of the hot water supply, the discarded water derivation stop command transmitting means 45 is derived after receiving the discarded water discharge preventing hot water discharge command. The amount of water passing through the hot water supply passage 9 and the connection passage 36 until the detected temperature detected by the water temperature detecting means 47 reaches the set temperature of the hot water supply is obtained in advance.

  Then, based on the obtained amount of passing water, the discarded water derivation stop command transmitting means 45 calculates a predetermined calculation method (for example, 1 / N of the obtained amount of passing water (N is a positive integer, For the same reason as described above by connecting the tip end portion of 36 to the recirculation circulation passage 15 in the vicinity of the heat source device 2, a method of obtaining by calculation of 2), B is a positive real number, for example, based on the detected flow rate of the flow rate sensor 10 that the calculated amount of water less than the amount of passing water obtained by calculation 1) has passed through the hot water supply passage and the connection passage. When it is determined, a discharge stop command for the waste water to the hot water circulation passage (the recirculation circulation passage 15) may be transmitted.

  Further, as shown by the broken line in FIG. 2, as the flow rate detection means, a flow rate sensor 10 a is provided in the waste water derivation unit 34, and the waste water derivation stop command transmission means 45 is replaced with the flow rate sensor 10 Based on the detected value of 10a, the passage of water that passes through the hot water supply passage 9 and the connection passage 36 until the detected temperature detected by the derived water temperature detection means 47 reaches the set temperature of the hot water supply after receiving the water discharge prevention hot water discharge command. It is also possible to control the detection of the amount of water, the calculation of the calculated amount of water, and the transmission of a derivation stop command to the hot water circulation passage (the recirculation circulation passage 15).

  Further, the discarded water derivation stop command transmitting means 45 is configured such that the detected temperature detected by the derived water temperature detecting means 47 is a set temperature of the hot water supply or a predetermined set temperature difference (for example, 2 ° C.) within an allowable range from the set temperature. When the temperature reaches a lower temperature, a discharge stop command to the waste water circulation passage may be transmitted and added to the waste water discharge control means 44.

  It should be noted that it is possible to set in advance by the heat source unit 2 whether to send out a discharge stop command to the hot water circulation passage (reheating circulation passage 15) of the waste water, or to select a stop command transmission timing. May be provided so that the user or the like can select. In any case, the waste water derivation stop command transmission means 45 adds a derivation stop command to the hot water circulation passage, which is transmitted at the timing as described above, to the waste water derivation control means 44.

  The waste water derivation control means 44 switches the switching valves 62 and 63 when receiving a derivation stop command from the waste water derivation stop command transmission means 45 to the hot water circulation passage (the recirculation circulation passage 15). The connection passage 36 and the recirculation circulation passage 15 are disconnected from each other, and the derivation of water from the hot water supply passage 9 to the recirculation circulation passage 15 is stopped. Further, when the drainage water derivation control means 44 stops the derivation of water from the hot water supply passage 9 to the recirculation circulation passage 15, this water derivation stop signal is sent to the remote control device via the signal relay means 41 of the heat source unit 2. 50 informing means 48.

  The notification means 48 receives the water derivation stop signal and indicates that the hot water at the set temperature or hot water near the set temperature can be discharged from the hot water supply destination, such as a chime sound, a buzzer sound, Notifications are made by announcements, blinking or lighting of LEDs (light emitting diodes) and the like. When the user opens the hot-water tap 18 after the notification by the notification means 48 is performed, hot water at or near the set temperature of the hot water is immediately discharged.

  The discarded water derivation operation canceling means 46 detects the elapsed time from the end of the previous hot water supply when the discarded water derivation control means 44 receives the discarded water discharge prevention command, and the detection time is a predetermined cancellation reference time. When it is within (for example, 5 minutes), the waste water derivation control means 44 cancels the derivation operation of the waste water to the hot water circulation passage (the recirculation circulation passage 15).

  In the present embodiment, in the connection passage 36 in the waste water outlet hot water unit 34, water is prevented from flowing from the recirculation circulation passage 15 side to the hot water supply passage 9 side in the vicinity of the outlet water temperature detecting means 47. The edge cutting means 130 is provided. In FIG. 1, the edge cutting means 130 is provided at the left position (upstream side) of the derived water temperature detection means 47, but may be provided at the right position (downstream side). As shown in FIG. 3, the edge cutting means 130 includes a main valve chamber 75, an edge cutting chamber 76, a drainage chamber 77, and a discharge valve chamber 78.

  The inlet passage 80 of the main valve chamber 75 is connected to the hot water supply passage side (that is, the upstream side) of the connection passage 36. A cylindrical wall that functions as a valve seat 82 projects from the bottom wall 82 of the main valve chamber 75, and a pilot that functions as a main on-off valve that opens and closes the inlet side of the valve hole passage 84 above the valve seat 82. An electromagnetic valve 85 is provided.

  The edge cutting chamber 76 is provided below the main valve chamber 75, and the edge cutting chamber 76 is provided with a first check valve 86 and an air release valve 87.

  The first check valve 86 has a valve body 88 that can move up and down along the inner wall surface of the edge cut chamber 76. A seal member 90 such as an O-ring is mounted on the upper side of the valve body 88. The seal member 90 abuts against an inclined wall surface 91 provided on the outlet side of the valve hole passage 84, and opens and closes the outlet of the valve hole passage 84 by the vertical movement of the valve body 88. A central portion 92 of the valve body 88 is provided with a barrel portion 92 projecting downward. A cylindrical member 94 having a flange 93 is slidably fitted in the barrel portion 92 so as to freely slide up and down. A pilot valve hole 96 is formed at the center of the bottom wall 95 of the member 94. The pilot valve hole 96 is opposed to the lower end surface of the body 92 of the valve body 88, and a valve 97 is provided on the lower end surface. The pilot valve hole 96 is opened and closed by the valve 97. ing. An engagement piece 100 protrudes inward from the peripheral wall side of the valve body 88. When the valve body 88 moves upward, the engagement piece 100 engages with the flange 93, and the valve body 88 The cylinder member 94 is pulled upward in conjunction with the above.

  A valve 102 that opens and closes a valve hole 101 that connects the edge cutting chamber 76 and the drainage chamber 77 is provided on the lower end surface side of the bottom wall 95 of the cylindrical member 94, and the valve hole 101 is moved by the downward movement of the valve body 88. The valve 102 is closed, and at this time, a gap is formed between the engagement piece 100 and the flange 93. A spring 104 is disposed between the engagement piece 100 and the bottom wall of the edge cutting chamber 76, and the valve body 88 is normally urged upward by the restoring force of the spring 104, so that the outlet side of the valve hole passage 84 is on the outlet side. Is closed by a seal member 90, and the valve hole 101 is opened in this state. The mechanical parts of the pilot valve hole 96 and the valves 97 and 42 constitute an atmosphere release valve 87 that opens and closes the valve hole 101.

  The discharge valve chamber 78 has an upper chamber 106 and a lower chamber 107 and is disposed adjacent to the edge cutting chamber 76, and the communication between the edge cutting chamber 76 and the upper chamber 106 is established by a passage 105 extending laterally from the edge cutting chamber 76. It is illustrated. A valve hole 110 is formed in the partition wall 108 of the upper chamber 106 and the lower chamber 107, and a negative pressure closing valve 111 is provided on the inlet side of the valve hole 110. The negative pressure closing valve 111 and the upper chamber A compression spring 113 is interposed between the top walls 112 of 106, and the valve hole 110 is closed by a negative pressure shut-off valve 111 under the urging force of the spring 113. On the other hand, the lower chamber 107 is provided with a second check valve 114 that opens and closes the outlet side of the valve hole 110, and the second check valve 114 and the bottom of the lower chamber 107 are similarly compressed. The spring 115 is interposed, and the outlet side of the valve hole 110 is closed by the second check valve 114 by the urging force of the spring 115. The lower chamber 107 is connected to the recirculation circulation line 13 side of the connection passage 36.

  A guide shaft 117 protrudes upward from the bottom surface side of the drainage chamber 77 communicating with the edge cut chamber 76 through the valve hole passage 84, and the float 118 is slidably fitted on the guide shaft 117. ing. A magnet (not shown) is attached to the float 118, and a reed switch (not shown) is provided on the wall surface of the drain chamber 77. When the float 118 rises to a preset water level due to buoyancy. Furthermore, the float 118 side magnet and the reed switch face each other, and an ON signal for starting the circulation pump 23 is output from the reed switch. The water level switch is operated by the float 118 side magnet and the reed switch. Is formed. An overflow pipe 120 protruding upward from the bottom wall side of the drain chamber 77 is provided. When the water level in the drain chamber 77 exceeds the upper end of the overflow pipe 120, the overflow water passes through the overflow pipe 120. It is designed to be discharged outside.

  Further, the bottom wall of the drainage chamber 77 communicates with the inlet side of the drainage pipe 121. As shown in FIG. 1, the outlet side of the drainage pipe 121 is the return pipe 17 of the recirculation circulation path 15, that is, the circulation pump. 23 is connected to a pipe line on the suction side. The drain pipe 121 is provided with a third check valve 122 and an electromagnetic valve 123. In this embodiment, an electric two-way valve 124 is provided in the return pipe 17 closer to the bathtub 14 than the connection part on the outlet side of the drain pipe 121.

  In the present embodiment, when water is passed from the hot water supply passage 9 side to the recirculation circulation passage 15 side through the connection passage 36 under the control of the waste water derivation control means 44, the opening operation of the pilot solenoid valve 85 is performed in the edge cutting means 130. As a result, the inlet side of the valve hole passage 84 is opened, and the water passed from the hot water supply passage 9 side to the connection passage 36 enters the valve hole passage 84, and the valve body 88 is resisted against the urging force of the spring 104 by the water pressure. Pushing downward, the outlet side of the valve hole passage 84 is opened. At the same time, the pilot valve hole 96 is closed by the downward movement of the valve 97 by the downward movement of the valve body 88, and the valve hole 101 is closed by the downward movement of the valve 102. Is disconnected. By this communication interruption, the water that enters the edge cut chamber 76 pushes up the negative pressure stop valve 111 by the tap water pressure and enters the valve hole 110, and further pushes down the second check valve 114 against the urging force of the spring 115. As a result, the outlet side of the valve hole 50 is opened, so that hot water enters the lower chamber 107 through the valve hole 110, passes through the connection passage 36 and enters the recirculation circulation passage 15.

  When a waste water derivation stop command transmission means 45 is transmitted from the waste water derivation stop command transmission means 45, the valve side 88 is closed as a result of the valve closing operation of the check pilot electromagnetic valve 85 being closed, so that the valve element 88 is The upward biasing force of the spring 104 overcomes the downward pressing force, and the valve body 88 starts to move upward. At this time, a gap is formed between the flange 93 of the cylindrical member 94 where the valve 102 is formed and the engagement piece 100 on the valve body 88 side. The pilot valve hole 96 is first opened as a result of the upward movement of the valve body 88 and the upward movement of the valve 97 in conjunction with the upward movement of the valve body 88.

  Then, as a result of the atmosphere on the drainage chamber 77 side entering the edge cut chamber 76 through the pilot valve hole 96, the edge cut chamber 76 becomes atmospheric pressure, and the pressing and closing force of the valve hole 101 by the valve 102 using the water pressure in the edge cut chamber 76. Is released. When the valve body 88 continues to rise due to the restoring force of the spring 104, the engagement piece 100 engages with the flange 93, and the cylindrical member 94 moves upward integrally with the valve body 88, so the valve 102 is also integrated. The valve hole 101 is completely opened, and the outlet side of the valve hole passage 84 is closed by the seal member 90 of the first check valve 86.

  At this time, the water filled in the edge cutting chamber 76 enters the drainage chamber 77 side from the valve hole 101. At this time, when the float 118 receives buoyancy and rises to the set position, an ON signal is output from the reed switch. The electromagnetic valve 123 is opened, the electric two-way valve 124 is closed and the circulation pump 23 is activated, and the water accumulated in the drainage chamber 77 passes through the drainage pipe 121 and is then forced by the circulation pump 23. Water is drained into the bathtub 14 from the outgoing pipe 16 side of the recirculation circulation passage 15.

  Simultaneously with the closing operation of the pilot solenoid valve 25, the negative pressure closing valve 111 closes the inlet side of the valve hole 110 by the biasing force of the spring 113, and the air on the drainage chamber 77 side passes through the edge cut chamber 76 to the valve hole 110. Prevent entry. The second check valve 114 also closes the outlet side of the valve hole 110 by the urging force of the spring 115 simultaneously with the closing operation of the pilot solenoid valve 85, and the sewage from the recirculation circulation line 3 side cuts the edge through the valve hole 110. This prevents entry into the chamber 76 side.

  Providing such edge cutting means 130 can prevent the sewage on the bathtub 14 side from flowing back into the edge cutting chamber 76 even if the bathtub 14 is disposed at a position higher than the heat source machine. . In this case, even if the first and second check valves 86 and 114 break down and the sewage on the bathtub 14 side enters the edge cut chamber 76, the sewage enters the drain chamber 77 side by opening the air release valve. When the sewage level in the drainage chamber 77 exceeds the set water level, the circulation pump 23 is activated by the operation of the water level switch and the sewage in the drainage chamber 77 is forcibly returned to the bathtub 14 side. The passage 36 does not enter the hot water supply passage 9 side. Further, in this case, even when the circulation pump 23 cannot be started due to a power failure or the like, the sewage that has entered the drainage chamber 77 is discharged outside from the overflow pipe 120 when the overflow pipe 120 is exceeded. Even in such a case, the severing of the sewage on the bathtub 14 side and the clean water on the hot water supply passage 9 side is surely performed by opening the air release valve, which is very safe in terms of hygiene.

  This embodiment is configured as described above. When the user operates the discarded water discharge prevention command output operation unit 49 of the remote control device 50 at the start of hot water supply, a waste water discharge prevention command is output, and the heat source machine 2 It is added to the waste water derivation control means 44 of the waste water derivation unit 34 through the signal relay means 41, and the waste water passes from the hot water supply passage 9 through the connection passage 36 and through the edge cutting means 130 provided in the connection passage 36. Further, it is led out to the recirculation circulation passage 15 through the switching valves 62 and 63 and led out to the bathtub 14. In addition, this water can be stored in the bathtub 14 by closing the stopper of the bathtub 14.

  Further, when the waste water discharge prevention command output operation unit 49 is operated, the waste water discharge prevention command is also applied to the combustion control means 42, and hot water forming operation related to the hot water supply operation by the combustion control means 42 is performed. While the discharge of the waste water to the recirculation circulation passage 15 and the discharge of the waste water to the bathtub 14 are performed, hot water is formed and the temperature of the water passing through the hot water supply passage 9 is increased to a temperature near the set temperature. It will be.

  Thereafter, at an appropriate timing as described above, a discharge stop command for the waste water to the hot water circulation passage (the recirculation circulation passage 15) is output from the waste water discharge stop command transmission means 45, and the waste water discharge control means 44 The derivation of water from the hot water supply passage 9 to the recirculation circulation passage 15 is stopped. At this time, the notifying means 48 of the remote control device 50 informs that hot water at a set temperature or hot water at a temperature close to the set temperature can be discharged from the hot water supply destination. By opening the hot-water tap 18, hot water at a set temperature or in the vicinity thereof can be supplied to the hot water supply destination.

  When the user operates the discarded water discharge prevention command output operation unit 49 of the remote control device 50 at the start of hot water supply, if the elapsed time from the end of the previous hot water supply is within the cancellation reference time, the discard is performed as described above. The operation of deriving waste water to the recirculation circulation path 15 by the water deriving control means 44 is canceled by the waste water deriving operation canceling means 46.

  In addition, this invention is not limited to the said Example, It sets suitably. For example, as shown by the broken line in FIG. 2, in the configuration in which the wastewater derivation preventing unit 34 is provided with the flow rate sensor 10a, based on the amount of water detected by the flow rate sensor 10a, for example, per day, per week, per month, etc. Within the unit period, the amount of waste water led out to the hot water circulation passage (reflecting circulation passage 15) is summed up, or the detection water amount of the flow sensor 10 of the heat source unit 2 and the waste water are not provided without the flow sensor 10a. Is derived to the recirculation circulation passage 15 within the unit period as described above based on the derived time to the recirculation circulation passage 15 (time from the transmission of the waste water discharge prevention command to the transmission of the deactivation stop command). The amount of waste water to be collected is summed up, and the amount of saved water is calculated by deriving it to the recirculation passage 15 without throwing away the waste water and deriving it to the bathtub 14 and storing it. It may be notified.

  This notification is performed by, for example, display on the display unit or announcement using a speaker by the notification means 48 provided in the remote control device 50. For example, “Today, water is supplied in one day. “We saved 10 liters,” you may be notified directly about the amount of water that was saved, or “Today we saved C yen for water in a day.” (C You may make it alert | report the amount of money which was saved like a positive number. If such notification is performed, the user's awareness of saving can be increased, and a heat source system that can be used more comfortably by the user can be obtained.

  Further, in the embodiment, the switching valves 62, 63, the derived water temperature detecting means 47, the discarded water derivation stop command transmitting means 45, the discarded water derivation control means 44, and the discarded water derivation operation canceling means 46 are provided. Thus, although the waste water derivation preventing unit 34 for preventing the waste water from coming out of the hot water supply destination is formed, the waste water derivation operation canceling means 46 can be omitted. Further, the water discharge prevention unit 34 is not formed. For example, a control configuration including the waste water discharge stop command transmission means 45 and the waste water discharge control means 45 is provided in the control device 40 of the heat source device 2 to detect the discharged water temperature. The switching valves 62 and 63 may be controlled on the basis of the detected temperature of the means 47, etc., so that the waste water can be derived or stopped.

  Furthermore, in the above embodiment, the front end side of the connection passage 36 is branched into two and connected to the recirculation circulation passage 15 through the switching valves 62 and 63 at two locations. The recirculation circulation passage 15 may be connected at one place via two switching valves. In this case, it is preferable that water introduced from the connection passage 36 to the recirculation circulation passage 15 side can be passed through the passages on both sides of the switching valve. For example, when only the switching valve 62 is provided, the water introduced into the recirculation circulation passage 15 via the switching valve 62 is supplied to both the outward pipe 16a on the bathtub 14 side and the outgoing pipe 16b on the heat exchanger 13 side. When only the switching valve 63 is provided, water introduced into the recirculation circulation passage 15 through the switching valve 63 is supplied to the return pipe 17a on the bathtub 14 side and the circulation pump 23 side. It is preferable to allow water to flow toward both the outgoing pipes 17b.

  Furthermore, in the said Example, the header 24 is provided in the connection part of the hot-water supply channel | path 9 and the connection channel | path 36, One or more hot-water supply front side channel | paths 9a and the connection channel | path 36 which guide warm water to a hot-water supply destination are provided in the header 24. Although connected, the hot water supply passage 9 and the connection passage 36 may be connected via a cheese for piping (T-shaped mechanical joint) without providing the header 24.

  Further, in the above embodiment, the remote control device 50 connected to the heat source device 2 as a signal is provided with the immediate hot water button as the discarded water discharge prevention command output operation unit 49. When the operation button (operation button for turning on and off the operation of the heat source device 2) normally provided in the remote control device 50 is turned on without providing the command output operation unit 49 (that is, the user tries to supply hot water) When the operation button is turned on), a waste water discharge prevention command may be output.

  Furthermore, in the said Example, although the alerting | reporting means 48 was provided in the remote control apparatus 50 signal-connected to the heat source machine 2, the alerting | reporting means 48 can also be abbreviate | omitted. Even in this case, the user knows in advance the approximate time until the end of the discharge of the discarded water to the hot water circulation passage (reheating circulation passage 15), and opens the hot water tap 18 after that time has elapsed. In this case, the waste water can be led out to the recirculation circulation passage 15, and when the hot-water tap 18 is opened, the set temperature or hot water in the vicinity thereof can be discharged. If the hot water tap 18 is opened in a state where the discharge of the discarded water to the recirculation circulation passage 15 is not completed, most of the amount of water supplied to the water supply passage 8 (for example, about 80%) ) It is led out to the recirculation circulation passage 15 through the connection passage 36, and the remaining amount of water is supplied to the hot water supply destination. Since the amount of hot water corresponding to the opening degree is discharged from the hot water supply destination, it is possible to significantly reduce the waste of water compared to the conventional example in which the function for deriving waste water to the recirculation circulation passage 15 is not provided. It can be used and it is easy to use.

  Furthermore, in the said Example, although it was set as the structure which has a heat exchanger of the two cans and two water channels which heats the hot-water supply side and the reheating side separately, the heat source device is a heat exchanger of the one can two water channels. It is good also as a structure to have. In this case, the arrangement of the switching valves 62 and 63 is set so that water introduced from the connection passage 36 to the recirculation circulation passage 15 does not flow to the heat exchanger side. In other words, in a configuration having a single-can two-water heat exchanger, the heat exchanger side of the recirculation circulation passage 15 is also heated by heating of the heat exchanger during the hot water supply operation. When the water introduced into the soaking circulation passage 15 flows to the heat exchanger side, the waste water is heated and energy is wasted. Therefore, in order to prevent the reheating, the switching valve 62, It is preferable to set 63 arrangement modes.

  Further, in the embodiment, the edge cutting means 130 having the configuration as shown in FIG. 3 is provided in the connection passage 36. However, the configuration of the edge cutting means 130 is not necessarily the same as the configuration provided in the embodiment, and the connection is made. The passage 36 is provided with an appropriate edge cutting configuration. However, it is preferable to provide the edge cutting means 130 having the configuration shown in FIG. 3 because the above-described effects can be obtained by the edge cutting means 130.

  Furthermore, in the said Example, although the heat source machine was set as the apparatus provided with the hot-water supply function and the reheating function of a bath, in addition to these functions, hot water supply to a heating apparatus, a bathroom dryer, etc. and hot water circulation are carried out. It may have a possible heating function, or may be a device having a solar heat collecting function to which a heat collector that collects sunlight heat is connected.

  Furthermore, in the said Example, although the heat source machine provided and provided the burner which performs gas combustion, you may provide the burner for oil combustion instead.

  Since the heat source system of the present invention can suppress waste of water with a simple configuration and can provide emergency water at the time of disaster, it can be used as, for example, a household heat source system.

2 Heat source machine 9 Hot water supply passage 10 Flow rate sensor 10a Flow rate sensor 14 Bathtub 15 Recirculation circulation passage 24 Header 34 Waste water derivation unit 36 Connection passage 40 Control device 41 Signal relay means 42 Combustion control means 43 Control device 44 Waste water derivation control means 45 Waste water derivation stop command transmission means 46 Waste water derivation operation cancellation means 47 Derived water temperature detection means 48 Notification means 49 Waste water discharge prevention command output operation section 50 Remote control device 62, 63 selector valve

Claims (9)

  A hot water supply heat exchanger provided in the heat source machine, a water supply passage for supplying water to the hot water supply heat exchanger, and a hot water supply passage for supplying hot water formed by the hot water heat exchanger to one or more hot water supply destinations A hot water circulation passage that is connected to the bathtub and circulates the hot water in the bathtub, and the distal end side of the connection passage that is connected to the hot water supply side position of the hot water supply passage laid outside from the heat source machine is A hot water circulation passage is connected to the hot water circulation passage from the hot water supply passage side to the hot water circulation passage, and when the water flow is stopped, the connection passage is closed. A cutting means for preventing back flow of hot water to the hot water supply passage is provided, and the temperature is determined in advance from a set temperature of hot water staying in the hot water supply passage from the heat source device to the connection portion of the connection passage to the hot water supply passage. Exceeded tolerance When the waste water discharge prevention command for preventing the waste water having a low temperature from coming out of the hot water supply destination is received, the waste water is led out from the hot water supply passage to the hot water circulation passage through the connection passage, A waste water derivation control means for stopping derivation of water from the hot water supply passage to the hot water circulation passage when receiving a command to stop derivation of the waste water to the hot water circulation passage is provided. .   2. The heat source system according to claim 1, wherein the valve and the edge cutting means provided in the connection passage are integrally connected to form a unit structure.   It has a derived water temperature detecting means for detecting the temperature of the water led out to the hot water circulation passage through the connection passage, and the detected temperature detected by the derived water temperature detecting means is a set temperature of hot water supply or an allowable range from the set temperature. A waste water derivation stop command transmitting means for transmitting a derivation stop command to the hot water circulation passage when waste water reaches a temperature lower by a predetermined set temperature difference is provided. The heat source system according to claim 1 or 2.   Derived water temperature detecting means for detecting the temperature of the water led out to the hot water circulation passage through the connection passage, and the detected temperature detected by the derived water temperature detecting means after receiving the discarded water discharge preventing hot water discharge command is The required time required to reach the set temperature is obtained in advance, and when the calculation time less than the required time determined by a predetermined calculation method based on the required time elapses, the waste water is supplied to the hot water circulation passage. The heat source system according to claim 1 or 2, further comprising waste water derivation stop command transmission means for transmitting a derivation stop command.   A flow rate detecting means for detecting the flow rate of waste water led out to the hot water circulation passage side through the hot water supply passage and the connection passage from the heat source device, and the temperature of the water led out to the hot water circulation passage through the connection passage A discharge water temperature detection means for detecting the waste water discharge prevention hot water discharge command, obtaining a time required for the detected temperature detected by the discharge water temperature detection means to reach the set temperature of the hot water supply, The hot water supply passage and the connection passage from the time of receiving a discarded water discharge prevention hot water discharge command based on the required time and the flow rate detected by the flow rate detection means until the detected temperature detected by the derived water temperature detection means reaches the set temperature of the hot water supply The amount of water passing through the water passage is determined in advance, and a calculated amount of water less than the amount of passing water determined by a predetermined calculation method based on the amount of passing water is connected to the hot water supply passage. Waste water derivation stop command transmitting means for transmitting a derivation stop command for the waste water to the hot water circulation passage when it is determined based on the detected flow rate of the flow rate detection means that there is a passage is provided. The heat source system according to claim 1, wherein the heat source system is a heat source system.   A remote control device disposed at the hot water supply destination is signal-connected to the heat source device, and a wastewater discharge prevention command output operation unit for outputting a wastewater discharge prevention command to the remote control device; It is provided that at least one of notification means for notifying that hot water having a set temperature or hot water having a temperature close to the set temperature can be discharged from the hot water supply destination when the operation of leading to the circulation passage is stopped is provided. The heat source system according to any one of claims 1 to 5, characterized in that:   The valve provided in the connecting passage and the edge cutting means, the derived water temperature detecting means, the discarded water derivation stop command transmitting means, and the discarded water derivation control means, and disposed of for preventing the discarded water from leaving the hot water supply destination. The heat source system according to any one of claims 3 to 6, wherein a water lead-out prevention unit is formed.   A header is provided at a connection portion between the hot water supply passage and the connection passage, and the header is connected to one or more hot water supply tip side passages that guide hot water from the header to a hot water supply destination and the connection passage. The heat source system according to claim 1, wherein the heat source system is a heat source system.   Elapsed time from the end of the previous hot water supply is detected when receiving the waste water discharge prevention command, and when the detected time is within a predetermined cancellation reference time, the waste water derivation control means derives the waste water into the hot water circulation passage. The heat source system according to any one of claims 1 to 8, further comprising waste water derivation operation canceling means for canceling the operation.

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