JP5887038B2 - Heat source equipment - Google Patents

Description

  The present invention relates to a heat source device that is formed by thermally connecting a reheating circulation path of bathtub hot water and a heating liquid circulation path.

  FIG. 2 shows a system configuration example of the heat source device. In the figure, combustion chambers 24 and 25 are provided in the appliance case 42, and in the combustion chamber 24, the liquid passes through the heating heat exchanger 28 (28 a, 28 b) and the heating heat exchanger 28. A heating burner 16 as a heating means for heating the heating burner 16 and a combustion fan 18 for supplying and exhausting combustion of the heating burner 16 are provided. Further, a hot water supply burner 17, a hot water supply heat exchanger 29 (29 a, 29 b) heated by the hot water supply burner 17, and a combustion fan 19 for supplying and exhausting combustion of the hot water supply burner 17 are provided in the combustion chamber 25. ing. The heat exchangers 28b and 29b are primary heat exchangers that recover sensible heat in the exhaust gas, and the heat exchangers 28a and 29a are secondary heat exchangers of a latent heat recovery heat exchanger that recovers latent heat in the exhaust gas. It is.

  Gas pipes 31 and 32 are connected to the heating burner 16 and the hot water supply burner 17 as supply passages for supplying fuel to the respective burners 16 and 17. The gas pipes 31 and 32 are branched from the gas pipe 30, and an original electromagnetic valve 80 is interposed in the gas pipe 30. The hot water supply burner 17 and the heating burner 16 each have a plurality of stages of combustion surfaces, and the amount of fuel supplied to each combustion surface of the heating burner 16 is determined by the proportional valve 86 interposed in the gas pipe 31. The amount of fuel supplied to each combustion surface of the hot water supply burner 17 is adjusted by the valve opening amount and the opening / closing control (fuel supply and stop) of the electromagnetic valves 81 and 82, and the proportional valve 87 interposed in the gas pipe 32. And the opening / closing control of the electromagnetic valves 83, 84, 85 (fuel supply and stop).

  The heating heat exchanger 28 (28a, 28b) is provided in a heating liquid circulation passage 5 including a cistern tank 100 and a liquid circulation pump 6, and the heating liquid circulation passage 5 is provided in an appliance case 42. Pipes 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 provided inside, pipes 40, 41, external passages provided outside the instrument case 42 44, 45 and 59 are connected. Further, a low-temperature capacity switching thermal valve 47 is interposed in the pipe line 98.

  The heating liquid circulation passage 5 circulates liquid (for example, hot water) by driving the liquid circulation pump 6, thereby allowing hot water mats 10 b and 10 c as low temperature heating apparatuses and a high temperature heating apparatus (for example, a bathroom heater) ( A liquid is supplied to the high temperature heating device 10a. An internal passage 51 is provided in the high-temperature heating device 10 a, and the thermal valve 12 is interposed in the internal passage 51. The internal passage 51 is connected to the conduit 97 through the conduit 40 and is connected to the conduit 59 through the conduit 41 and the liquid confluence means 115.

  The discharge-side passage of the liquid circulation pump 6 is branched into a conduit 90 and a conduit 91, one of which is the heating heat for heating the liquid circulating in the heating liquid circulation passage 5. The liquid is introduced to the exchanger 28b side, and the other pipe line 90 supplies the liquid to the hot water mats 10b and 10c. A heating low temperature thermistor 36 for detecting the temperature of the liquid introduced into the heating heat exchanger 28b is provided in the inlet-side pipe line 91 of the heating heat exchanger 28b. A conduit 92 is provided on the outlet side of the heating heat exchanger 28b, and a heating high temperature thermistor 33 for detecting the temperature of the liquid led out through the heating heat exchanger 28b is provided in the conduit 92. ing.

  The pipe 90 is provided with a liquid branching means 37 having a thermal valve 8, and the pipe 90 is connected to the pipe 45 via the liquid branching means 37, and the hot water mat 10 b, The water inlet side of 10c is connected. An internal passage 52 is formed in the hot water mats 10 b and 10 c, and the water discharge side of the hot water mats 10 b and 10 c is connected to the pipe line 95 through the pipe 44, the liquid joining means 115 and the pipe 59.

  The pipe 95 is connected to the liquid introduction side of the heating heat exchanger 28a, and the pipe 94 is connected to the liquid outlet side of the heating heat exchanger 28a. The pipe 93 is connected to the suction port side of the liquid circulation pump 6, and the cistern tank 100 is interposed between the pipe 93 and the pipe 94. A part of the cistern tank 100 is open to the atmosphere, and an overflow passage 53 for discharging the liquid overflowing from the cistern tank 100 due to, for example, volume expansion of the liquid is connected to the cistern tank 100. Thus, the tip of the overflow passage 53 is led to the outside of the heat source device (such as a drain port).

  A drain collecting means (drain receiving portion) 39 is provided below the heating heat exchanger 28a and the hot water supply heat exchanger 29a. The drain collected by the drain collecting means 39 is drained through the drain discharge passage 75. After being introduced into the neutralizer 76 and neutralized by the drain neutralizer 76, it is led through the drain discharge passage 77 to the outside of the heat source device (such as a drain outlet to which the tip of the drain discharge passage 77 is connected). It is burned.

  A water supply passage 88 is provided on the inlet side of the hot water supply heat exchanger 29a. The water supply passage 88 includes flow rate detection means 73 for detecting the amount of hot water by detecting the amount of hot water flowing through the water supply passage 88. An incoming water temperature sensor 74 for detecting the incoming water temperature and a water amount servo 69 for changing the hot water supply flow rate are provided. In addition, the heating liquid circulation passage 5 is connected to the water supply passage 88 through the connection passage 57 and the makeup water electromagnetic valve 46. A hot water supply passage 26 is provided on the outlet side of the hot water supply heat exchanger 29b, and the leading end side of the hot water supply passage 26 is led to an appropriate hot water supply destination.

  Further, a bypass passage 70 for connecting the hot water supply passage 26 and the water supply passage 88 without the hot water supply exchanger 29 is provided, and a bypass servo as a bypass flow valve is provided at a connection portion of the bypass passage 70 with the water supply passage 88. 58 is provided. In the hot water supply passage 26, a hot water temperature detection sensor 113 is provided on the downstream side of the formation portion of the bypass passage 70, and a hot water temperature detection sensor 114 is provided on the hot water supply heat exchanger 29 side.

  A recirculation circuit 13 having an outward pipe 14 and a return pipe 15 is connected to the bathtub 27, and this recirculation circuit 13 is connected to the heating liquid circulation path 5 via the bath heat exchanger 7. Thermally connected. The bath heat exchanger 7 is a bath water reheating heat exchanger formed by a liquid-liquid heat exchanger between the recirculation circuit 13 and the pipe 89 of the heating liquid circulation path 5. A flow control valve 38 is provided on the inlet side to the bath heat exchanger 7. The reheating circulation path 13 is provided with a bathtub hot water circulation pump 20 that circulates bathtub hot water. The bath heat exchanger 7 circulates in the reheating circulation path 13 by driving the bathtub hot water circulation pump 20, thereby heating liquid circulation. The bath water is heated by heat exchange with the liquid passing through the passage 5.

  The recirculation circuit 13 includes a bath temperature sensor 21 that detects the temperature of the bath water, a water level sensor 22 that detects the water level of the bath water, and a bath water flow switch 34 that detects the water flow in the recirculation circuit 13. Is installed. One end side of the return pipe 15 is connected to the suction port side of the bathtub hot water circulation pump 20, and the other end side of the return pipe 15 is connected to the bathtub 27 via the circulation fitting 56. One end side of the outgoing pipe 14 is connected to the discharge port side of the bathtub hot water circulation pump 20, and the other end side of the outgoing pipe 14 is connected to the bathtub 27 via a circulation fitting 56.

  A pouring water unit 55 is connected to the hot water supply passage 26 via a pipe 54 on the downstream side of the formation portion of the branch passage 70 and the arrangement portion of the hot water temperature detection sensor 113. Is connected to one end side of the bath pouring introduction passage 23, and the other end side of the bath pouring introduction passage 23 is connected to the bathtub hot water circulation pump 20. The hot water unit 55 is provided with a hot water solenoid valve 48, a hot water sensor 49, and check valves 50a and 50b. The hot water supply heat exchanger 29, the hot water supply passage 26 and the pipe 54, the pouring water unit 55, the hot water pouring introduction passage 23, the bath hot water circulation pump 20, the bath heat exchanger 7, and the outgoing pipe 14 are sequentially passed through the bathtub. The passage up to 27 constitutes a hot water injection passage for hot water filling and water injection.

  In the heat source device as shown in FIG. 2, for example, when performing a heating operation of the high-temperature heating device 10a, and when performing a reheating operation of bathtub hot water at the time of operating a reheating button of a remote controller or operating a heat retention mode function described later, The heating heat exchanger 28 is heated by the heating burner 16, and the operation of the function of the high-temperature liquid circulation mode for circulating the temperature of the liquid exiting the heating heat exchanger 28b as a predetermined high-temperature setting temperature (for example, 80 ° C.) is performed. (The temperature of the liquid coming out of the heating heat exchanger 28b is measured by the heating high temperature thermistor 33, and the liquid is circulated while the detected temperature is about 80 ° C.).

  And when heating operation of the high temperature heating apparatus 10a is performed, the thermal valve 12 of the high temperature heating apparatus 10a is opened, and this high temperature liquid is driven by the liquid circulation pump 6 as shown by arrows A to F in FIG. The liquid is circulated to supply the liquid to the high temperature heating device 10a.

  Further, in this state, when the reheating operation of the hot water in the bathtub is performed, the liquid that has flowed out of the heating heat exchanger 28b and passed through the pipe 92 is passed through the pipe 97 as shown by an arrow B in FIG. By opening the flow rate control valve 38, the flow control valve 38 is also passed through the pipe 89 as shown by the arrow B '. The bath hot water circulation pump 20 is driven while the liquid flowing on the pipe 89 side (bath heat exchanger 7 side) passes through the pipe 96 and returns to the pipe 95, so that the bath hot water is shown in FIG. Circulate as shown by the arrow H in FIG. 5 and the bath heat exchanger 7 (liquid-liquid heat exchanger) passes through the heating liquid circulation passage 5 and the bath water passing through the recirculation circulation path 13. The hot water reheating operation is performed until the temperature of hot water in the bathtub 27 (detection temperature of the bath temperature sensor 21) reaches the bath set temperature by heat exchange.

  Further, when only the reheating operation of the bath water is performed without performing the heating operation of the high-temperature heating device 10a, the heating valve 12 of the high-temperature heating device 10a is closed, so that the heating heat exchanger 28b is heated. After passing a liquid at a high temperature set temperature (for example, a liquid at 80 ° C.) through the pipe line 92 as shown by the arrow A, it does not pass through the pipe line 97 (without flowing in the direction of arrow B in FIG. 2). As shown by the arrow B ′, it passes through the conduit 89 side. In the same manner as described above, this liquid and the hot water in the bathtub are exchanged through the liquid-liquid bath heat exchanger 7 to perform a reheating operation of the hot water in the bathtub 27.

  On the other hand, when only the hot water mats 10b and 10c are heated without heating the high temperature heating device 10a or reheating the bath water, hot dash is performed until the inside of the heating liquid circulation passage 5 is heated. Except for the operation, the liquid in the heating liquid circulation passage 5 is heated by the heating burner 16, and the liquid coming out of the heating heat exchanger 28b is circulated as a predetermined low temperature setting temperature (for example, 60 ° C.) lower than the high temperature setting temperature. The operation of the function of the low temperature liquid circulation mode is performed (the temperature of the liquid coming out of the heating heat exchanger 28b is measured by the heating high temperature thermistor 33, and the liquid is circulated while the detected temperature is about 60 ° C.).

  At this time, the liquid passing through the pipe 92 is circulated as shown by arrows C, D, E, and F in FIG. The liquid is introduced into the conduit 94 through the cistern 100 side toward the liquid circulation pump 6 side as shown by the arrow E in the figure, and the liquid is passed through the liquid circulation pump 6 as shown by the arrow G in the figure. Liquid is supplied through a circulation path for low-temperature heating that is sequentially passed through the pipes 90 and 45 and introduced into the hot water mats 10b and 10c. The liquid that has passed through the hot water mats 10 b and 10 c returns to the pipe line 95 via the pipe line 44 and the liquid joining means 115.

  Further, during the hot dash operation, for example, the temperature of the liquid coming out of the heating heat exchanger 28b is measured by the heating high temperature thermistor 33, and the detected temperature is about 80 ° C. Is supplied to the hot water mats 10b and 10c. Then, when the liquid returned from the hot water mats 10b and 10c passes through the pipelines 44 and 95 and further returns to the systern 100 through the pipeline 94 as shown by the arrow D, the heat exchanger 28b for heating is used. The liquid is mixed with the liquid passing through the pipe line 98, the pipe line 98, and the pipe line 94, and the temperature of the liquid becomes lower than 80 ° C., and passes through the cistern 100 through the liquid circulation pump 6 and the hot water mat. When it is sent to 10b and 10c, it becomes a liquid of about 70 ° C.

  Recently, when performing the operation of the function of the low-temperature liquid circulation mode, two temperatures of 60 ° C. and 40 ° C. are set as the low-temperature set temperatures, and the hot water mats 10b, 10c, etc. are provided. When the indoor temperature reaches a predetermined liquid temperature lowering control reference temperature, the heat source is provided with a function of circulating the temperature of the liquid circulating in the heating liquid circulation passage 5 to a temperature of 40 ° C. lower than 60 ° C. Devices are also used.

  Further, when a bath water hot water renewal command is output while the heating operation of only the hot water mats 10b and 10c is being performed in a state where the high temperature heating device 10a is not heated or the hot water bath reheating is not performed. Then, the low temperature capacity switching thermal valve 47 is closed (or the valve opening amount is reduced), and similarly to the reheating operation, the liquid heated by the heating heat exchanger 28b and led to the pipe line 92 is discharged. The operation is switched to the operation of the function of the high-temperature liquid circulation mode in which the temperature is circulated as a high temperature set temperature such as 80 ° C. Then, the temperature of the liquid passing through the pipe 89 is set to about 80 ° C. by the function of the high-temperature liquid circulation mode, and the liquid is circulated, so that the bath hot water is quickly recharged in the same manner as the bath hot water refill operation. I have to.

  In this case, the high-temperature liquid led out from the heating heat exchanger 28b to the pipe 92 is closed in the pipe 94 by closing the low-temperature capacity switching thermal valve 47 (or reducing the valve opening amount). Is not introduced (or only a small amount is introduced). The hot water mats 10b and 10c have a liquid whose temperature is further lowered by passing through the pipes 96 and 95 and the cistern 100 after the temperature is lowered by the heat exchange with the bath hot water through the pipe 89. Since it is introduced through the conduit 93, the liquid circulation pump 6, and the conduit 90, the temperature of the liquid introduced into the heating devices 10b and 20c is about 60 ° C.

  Further, in this heat source device, when performing hot water filling (automatic hot water filling operation) to the bathtub 27, the water passing through the hot water supply heat exchanger 29 is heated by the combustion of the burner 17, and hot water is supplied to the bathtub 27 through the hot water filling water injection passage. Pour into. After the automatic hot water filling, the following operation of the function of the heat retention mode is performed during the heat retention operation time of, for example, 4 hours. That is, when the detected temperature of the bath temperature sensor 21 is taken and the detected temperature falls below a preset allowable range from the preset bath set temperature, as described above, the heating heat exchanger 28b The operation of the reheating operation while performing the operation of the function of the high-temperature liquid circulation mode in which the temperature of the liquid heated and circulated to the pipe line 92 is circulated as a high temperature set temperature (for example, 80 ° C.) is performed for, for example, 3 minutes, An operation is performed so that the temperature detected by the bath temperature sensor 21 becomes the bath set temperature.

Japanese Patent Laid-Open No. 8-35657

  By the way, in the heat source device having the system configuration as shown in FIG. 2, when the bath water is refilled while performing the function of the high-temperature liquid circulation mode, the reheating is performed quickly. However, since the heat efficiency of the heating heat exchanger 28 (28a, 28b) tends to decrease as the heating temperature increases, the temperature of the liquid is lowered by, for example, 60 ° C. or 40 ° C. by the heating heat exchanger 28b. The heat efficiency of the heat exchanger 28 (28a, 28b) for heating is reduced during the operation of the function of the high-temperature liquid circulation mode compared to the operation of the function of the low-temperature liquid circulation mode that heats and circulates to the set temperature. In addition, the appliance case 42 of the heat source device is often disposed outdoors, and if the temperature of the liquid (heating medium) in the heating liquid circulation passage 5 in the appliance case 42 is high, heat is easily radiated by wind or the like. Therefore, there is a lot of waste of heat.

  However, conventionally, the hot water reheating operation is always performed while performing the function of the high temperature liquid circulation mode, and the function of the low temperature liquid circulation mode in which only the hot water mats 10b and 10c are heated is performed. When a bath hot water reheating operation command is transmitted during operation, the operation is switched to the operation of the function of the high-temperature liquid circulation mode, and the temperature of the liquid heated by the heating heat exchanger 28b and led out to the pipe line 92 is 80. Heating was performed so that the temperature would be as high as ° C. Therefore, in addition to having to control the mode switching operation each time, the efficiency of the heat exchanger for heating is reduced, and a lot of energy is required to heat the liquid to a high temperature. The amount of heat was large and wasteful.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to appropriately perform a bath reheating operation by exchanging heat with a liquid circulation passage for heating without wasting heat energy as much as possible. An object of the present invention is to provide a heat source device that can be used.

  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 has a heating liquid circulation passage having a function of circulating the liquid and supplying the liquid to the heating device, and a reheating circulation passage connected to the bathtub. The heating liquid circulation passage is thermally connected to the heating liquid circulation passage via heat exchange means, and the heating liquid circulation passage circulates the liquid in the heating liquid circulation passage, and the driving of the liquid circulation pump A heating heat exchanger that heats the liquid circulated by the heat exchanger, and a hot water circulation pump that circulates the hot water in the bathtub is provided in the reheating circulation passage. The liquid in the heating liquid circulation passage is circulated while being heated by a heat exchanger, and the bathtub hot water is circulated through the recirculation circulation passage to circulate the bathtub hot water and the heating liquid circulation passage. A heat source device having a function of exchanging heat with liquid via the heat exchanging means to replenish bathtub hot water, wherein the liquid is heated to a preset high temperature by the heating heat exchanger. A function of a high-temperature liquid circulation mode for circulating in the heating liquid circulation passage, and the heating liquid circulation by heating the liquid to a predetermined low-temperature set temperature lower than the high-temperature set temperature by the heating heat exchanger A function of a low-temperature liquid circulation mode for circulating in the passage, and the operation of the function of the low-temperature liquid circulation mode is continued when the reheating operation of the bathtub hot water is performed during the operation of the function of the low-temperature liquid circulation mode. The liquid heated to the low temperature set temperature is circulated through the heating liquid circulation passage, and the bath hot water is replenished by heat exchange between the liquid and the bath hot water. When the bath hot water replenishment operation is performed at a time other than during the operation of the function of the low temperature liquid circulation mode, the liquid is circulated through the heating liquid circulation passage in the high temperature liquid circulation mode to heat the liquid and the bath hot water. A configuration having a recirculation liquid circulation mode control means for performing reheating of bathtub hot water by replacement is a means for solving the problem.

  Further, the second invention has a bather presence / absence judging means for judging whether or not there is a bather at the time of bathing hot water in addition to the configuration of the first invention, and a liquid mode control means at the time of chasing. When the bather presence / absence determining means determines that there is a bather, the operation of the function of the high-temperature liquid circulation mode is performed even when the bath water is repelled during the operation of the function of the low-temperature liquid circulation mode. It is characterized in that the liquid heated to the high temperature set temperature is circulated and the bath hot water is replenished.

  Furthermore, in addition to the structure of said 2nd invention, 3rd invention detects that the person is bathing in the bathtub based on the water level sensor which detects the water level of bathtub hot water, and the detected water level of this water level sensor A bathing detection means, and a bather presence / absence judgment means judges that there is a bather when bathing of a person into the bathtub is detected by the bathing detection means, and the bathing detection means It is characterized in that it is determined that there is no bather when no bathing of a person is detected.

  Further, in the fourth invention, in addition to the configuration of the second or third invention, a bath-arranged remote control device and a kitchen-arranged remote control device are signal-connected to the heat source device, and a bather presence / absence judging means is provided. Determines that there is a bather when a bathing hot water refill instruction is issued by the remote control device of the bathroom arrangement, and there is no bather when a bath hot water refilling instruction is issued by the remote control device of the kitchen arrangement It is characterized by judging.

  Further, the fifth invention has a bathtub hot water temperature detecting means for detecting the temperature of the bathtub hot water in addition to the configuration of any one of the first to fourth inventions, and the reheating liquid circulation mode control means includes: When the liquid temperature is circulated in the low temperature liquid circulation mode, when the temperature detected by the bath water temperature detecting means is lower than the preset approach temperature lower than the predetermined bath set temperature, the mode is switched to the high temperature liquid circulation mode. Circulating the liquid, circulating the liquid in the high temperature liquid circulation mode until the temperature detected by the bath water temperature detecting means reaches the set approach temperature, and then switching to the low temperature liquid circulation mode to circulate the liquid. To do.

  According to the present invention, the function of the high-temperature liquid circulation mode in which the liquid circulating through the heating liquid circulation passage is heated to a predetermined high temperature setting temperature by a heating heat exchanger and circulated in the heating liquid circulation passage; A function of a low-temperature liquid circulation mode in which the liquid is heated to a predetermined low-temperature set temperature lower than the high-temperature set temperature by the heating heat exchanger and circulated in the heating liquid circulation passage. When the bath hot water replenishing operation is performed during the operation of the function of the low-temperature liquid circulation mode, the operation of the function of the low-temperature liquid circulation mode is continued and the liquid heated to the low temperature set temperature is circulated in the heating liquid circulation The following effects can be achieved by circulating in the passage and reheating the bath water by heat exchange between the liquid and the bath water.

  That is, as described above, when performing the reheating operation of the bathtub hot water during the operation of the function of the low temperature liquid circulation mode, the reheating operation of the bathtub hot water is continued by continuing the mode as it is. Since the mode switching control operation to the high-temperature liquid circulation mode can be omitted, the control operation can be simplified, and the reheating of the bath water while performing the function of the low-temperature liquid circulation mode can be performed using the high-temperature liquid circulation mode. Although it takes more time than the hot water replenishment operation while performing the operation of the circulation mode function, the heat efficiency of the heat exchanger can be increased and the waste of heat energy due to heat dissipation etc. can be saved. It is possible to form a heat source device capable of generating energy.

  In addition, when the bath hot water replenishment operation is performed at a time other than during the operation of the function of the low temperature liquid circulation mode, the liquid heated to the high temperature set temperature is circulated in the heating liquid circulation passage in the high temperature liquid circulation mode. By performing hot water replenishment, when bath hot water is recharged when the operation of the function of the low-temperature liquid circulation mode is not performed, it is possible to recharge the bathtub hot water quickly. When the high-temperature heating device is connected to the liquid circulation passage and the hot water reheating operation is performed during the operation, the high-temperature heating device is accurately operated by the liquid circulation by the operation of the function of the high-temperature liquid circulation mode. be able to.

  In addition, when a bathing person feels that the bath water temperature is “warm” and operates the reheating switch provided on the remote control device, the reheating of the bath water starts as quickly as possible. Although it is preferable that the bath water temperature becomes the bath set temperature, when the bath water starts to be reheated when a person is not taking a bath, the reheating speed should be slow.

  Therefore, even when the bath hot water refilling operation is performed during the operation of the function of the low-temperature liquid circulation mode, the bath hot water retreat is performed when it is determined that there is a bather at the time of bathing the bath hot water. In this case, by switching to the high-temperature liquid circulation mode and circulating the liquid in the high-temperature liquid circulation mode, it is possible to quickly catch up and enable the user to use comfortably, and the low-temperature liquid circulation mode. When it is determined that there is no bather during the operation of this function, the liquid is circulated in the low-temperature liquid circulation mode to recapture the heat, so that heat energy is not lost as much as possible, and an appropriate It is possible to perform a reheating operation of bathtub hot water by heat exchange with the liquid circulation passage for heating by the functional operation of the mode.

  Also, based on the water level detected by the water level sensor that detects the level of the hot water in the bathtub, it is determined that there is a bather when detecting that a person is bathing in the bathtub, and that the person is bathing in the bathtub. By determining that there is no bather when detection is not performed, it is possible to accurately determine the bathing of a person in the bathtub, as described above, without wasting heat energy as much as possible. It is possible to perform a reheating operation of bathtub hot water by exchanging heat with the liquid circulation passage for heating by a functional operation in an appropriate mode.

  Furthermore, it is determined that there is a bather when a bathing hot water refill instruction is issued by the bathroom-arranged remote control device among the bathroom-arranged remote-control device and the kitchen-arranged remote-control device signal-connected to the heat source device, and the kitchen By determining that there is no bather when the remote control device of the arrangement issues a bath hot water retreat instruction, it is possible to accurately determine the person bathing in the bathtub, and as described above, heat energy is not wasted as much as possible. In addition, it is possible to perform a reheating operation of the bath by heat exchange with the liquid circulation passage for heating by a functional operation in an appropriate mode as necessary.

  In other words, when performing a chasing operation by operating the bath remote control device, the user is chasing the chasing operation in the bathroom, so there is a high possibility that the user will take a bath without taking any time during or after bathing. By using the high-temperature liquid circulation mode, it is possible to comfortably use it with quick rebirth. On the other hand, when the chasing operation is performed by operating the kitchen remote control device, the user is not in the bathroom, so there is a high possibility that the user will take a bath after a certain amount of time after the operation. It is possible to eliminate waste of heat energy by performing the chasing.

  Furthermore, when liquid is circulated in the low-temperature liquid circulation mode at the time of reheating bath water, the temperature detected by the bath water temperature detecting means is lower than the preset approach temperature that is lower than the preset bath setting temperature. When it is, the liquid is circulated by switching to the high-temperature liquid circulation mode, and after the liquid is circulated in the high-temperature liquid circulation mode until the temperature detected by the bath water temperature detecting means reaches the set approach temperature, the low-temperature liquid circulation mode The following effects can be obtained by switching the liquid to and circulating the liquid.

  For example, when the user tries to take a bath after operating the kitchen remote control device for a while, when a rebirth command is issued from the kitchen remote control device, the bath water temperature is lower than the set approach temperature In slow recirculation in the low-temperature liquid circulation mode, the bath water temperature may not be close to the bath set temperature when the user bathes, but the bath water temperature may be too low. By swiftly chasing until it becomes possible, the bath water temperature can be raised to a temperature close to the set temperature by the time the user tries to bathe, and the bath water can be used comfortably. After the water temperature reaches the set approach temperature, it is possible to prevent the hot water having a high temperature from being led out to the bathtub from the recirculation circuit by slowly reheating.

It is a block diagram which shows the control structure of one Example of the heat-source apparatus which concerns on this invention. It is explanatory drawing which shows typically the system structural example of a heat-source apparatus, and its operation example. It is explanatory drawing which shows the example of a floor heating driving | operation operation | movement time, the bathing water reheating operation timing, and a bathing operation timing. It is explanatory drawing which shows another system structural example of a heat-source apparatus, and the operation example typically.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment and the reference drawings thereof, the same reference numerals are given to the same name portions as those of the constituent elements described so far, and the duplicate description is omitted or simplified.

  The system configuration of the heat source device of the present embodiment is the same as that of the heat source device shown in FIG. 2, and the characteristic feature of this embodiment is that the control configuration shown in FIG. That is, it is configured to control the operation when whispering. The control means 60 of the heat source device has a person bathing detection means 62, a bather presence / absence judgment means 63, a reheating liquid circulation mode control means 64, and a combustion control means 65. The bath remote control device 1 in the bathroom arrangement and the kitchen arrangement The kitchen remote control device 2, the floor heating remote control device 3, and the bathroom heating remote control device 4 are connected.

  In this embodiment, the low temperature heating devices are the hot water mats 10b and 10c, and the floor heating remote control device 3 is a remote control device for performing operations such as turning on and off the 10b and 10c operation of the hot water mat and setting an off timer. . In the present embodiment, the high-temperature heating device 10a is a bathroom heating device, and the bathroom heating remote control device 4 is a remote control device for performing operations such as on / off operation of the bathroom heating device and setting of an off timer.

  The person bathing detection means 62 detects that a person is bathing in the bathtub 27 based on the water level detected by the water level sensor 22. Specifically, for example, a reference value for fluctuation of the water level is given in advance, and when the fluctuation of the detected water level of the water level sensor 22 is greater than or equal to this reference value, it can be determined that a person has bathed. This determination method is appropriately set. The person bathing detection means 62 is a human sensor based on a sensor signal of a human sensor (for example, an infrared sensor or the like, not shown in the figure) provided at a bathroom or its entrance. May be detected. The human bathing detection means 62 may perform both human detection by the human sensor and human detection by the detected water level fluctuation of the water level sensor 22. When a person is detected, the person bathing detection means 62 adds the detection signal to the bather presence / absence determination means 63.

  The bather presence / absence judging means 63 is a means for judging whether or not there is a bather at the time of bathing hot water in the bathtub, and its detection method is not particularly limited and is appropriately set. In the embodiment, for example, when a person bathing in the bathtub 27 is detected by the person bathing detection means 62, that is, a person detection signal from the person bathing detection means 62 is added to the bather presence / absence judgment means 63. When the person is bathing, it is determined that there is a bather, and when the person bathing detection means 62 does not detect a person bathing in the bathtub 27, it is determined that there is no bather.

  The bather presence / absence judging means 63 judges that there is a bather when the bath remote controller 1 issues a bath hot water refill instruction (for example, when the bath remote switch 1 is turned on). When the kitchen remote control device 2 issues a bath hot / water renewal command (for example, when the kitchen remote control device 2 reheating switch is turned on), it is determined that there is no bather. These determination signals are applied to the reheating liquid circulation mode control means 64.

  The combustion control means 65 is a means for controlling the combustion during the operation of each function as described above, and in accordance with commands from the remote control devices 1 to 4, the water level sensor 22, the bath temperature sensor 21, and the bath water flow switch. Based on the detection signal such as 34, the bathtub hot water circulation pump 20, the liquid circulation pump 6, the low-temperature capacity switching thermal valve 47, the gas proportional valve 86, the gas on-off valves 81 and 82, the combustion fan 18, and the like are controlled. In addition, the combustion control means 65 provides the control information during heating operation with heating control of the heating heat exchanger 28 and drive control of the liquid circulation pump 6 as described below and during bath water reheating operation. The recirculation liquid circulation mode control means 64 is applied every moment or every predetermined interval. In the description of the control method by the combustion control means 65, the same control as the conventional example and the well-known combustion control operation will be omitted or simplified.

  For example, the combustion control means 65 detects the high temperature heating thermistor 33 when the operation of the bathtub heating remote control device 4 is on based on the operation information of the floor heating remote control device 3 and the bathroom heating remote control device 4 as in the conventional example. While the liquid is heated by the heating heat exchanger 28b so that the temperature becomes a high temperature set temperature (for example, 80 ° C.) (the liquid heating temperature is adjusted), the function of the high-temperature liquid circulation mode is performed as described above. By driving the liquid circulation pump 6, the liquid is circulated as shown by arrows A to F in FIG. 2 to supply the liquid to the high-temperature heating device 10a.

  On the other hand, when only the hot water mats 10b and 10c are heated without performing the operation (heating operation) of the high temperature heating device 10a or the reheating operation of the bathtub hot water, the pipe of the heating liquid circulation passage 5 is provided as in the conventional example. The hot dash operation as described above is performed until the inside of the road is warmed, and thereafter, the heating heat exchanger 28b is set so that the detected temperature of the high temperature heating thermistor 33 becomes a low temperature setting temperature (for example, 60 ° C.). The liquid is heated by (adjusting the heating temperature of the liquid), and the function of the low-temperature liquid circulation mode is performed as described above. In either case, liquid (hot water) is supplied to the hot water mats 10b and 10c in the circulation path for low-temperature heating.

  The reheating liquid circulation mode control means 64 takes in the control information from the combustion control means 65 as described above, and when the reheating operation of the bathtub hot water is performed during the operation of the function of the low temperature liquid circulation mode, the presence / absence determination of the bather is determined. Except when it is determined by the means 63 that there is a bather (when the determination signal that the bather is present is added from the bather presence / absence determination means 63 to the reheating liquid circulation mode control means 64), the temperature is low. The operation of the function of the liquid circulation mode is continued, and the liquid heated to the low temperature set temperature by the heating heat exchanger 28b is circulated in the heating liquid circulation passage 5, and the bathtub hot water by heat exchange between the liquid and the bathtub hot water is performed. A command is added to the combustion control means 65 so as to retreat.

  On the other hand, when it is determined by the bather presence / absence determining means 63 that there is a bather, the reheating liquid circulation mode control means 64 performs the reheating operation of the bathtub hot water during the operation of the function of the low temperature liquid circulation mode. Even if it exists, it switches to the operation | movement of the function of high temperature liquid circulation mode, the liquid heated to the said high temperature preset temperature with the heat exchanger 28b for heating is circulated to the liquid circulation path 5 for heating, and the heat of the liquid and bathtub hot water A command is given to the combustion control means 65 so as to replenish the bath water by replacement.

For example, FIG. 3 shows the operation status of winter floor heating (warm water mats 10b and 10c) in warm regions, bathing timings T ₁ , T ₂ , T ₃ , T ₄ , and the follow-up of bath water in bath automatic operation. Each example of whispering timing (refreshing operation start timing in the operation of the heat retaining mode function) Ta to Te is shown. In this example, the floor heating operation is performed from 18:00 to past 22:00 as shown by the shaded portion of the figure, and as shown by referring to the display of warming (automatic), it is 8 o'clock at night. (20:00) The bathing operation by the operation of the heat insulation mode function is started at the timing of Ta to Te between 20:00 and 22:00 after the automatic bathing operation is performed and the hot water filling is performed before. 5 times in total. Further, bather at _four, as shown in _{T 1, T 2, T 3} , T 4, around 50 pm 19, around 10 pm 20, around 55 pm 21, around 10 pm 22 , Each indicates that bathing is performed.

If bathing is performed at such a timing, the bath water reheating operation timing (Ta to Te) by the operation of the heat retention mode function overlaps with the operation time of the floor heating, and the function of the low-temperature liquid circulation mode When the operation is performed, the bath water is refilled. However, in the reheating time Ta, there is bathing bather the second person in the reheating operation (see T _2), this bath is detected by the human bathing detection means 62, the bather presence determination means 63 Since the determination signal that there is a bather is applied to the chasing liquid circulation mode control means 64, the chasing liquid circulation mode control means 64 determines that there is a bather from the bather presence / absence judgment means 63 at this time. When the determination signal is received, a command is given to the combustion control means 65 so as to switch to the operation of the function of the high-temperature liquid circulation mode and circulate the liquid heated to the high temperature set temperature to replenish the bathtub hot water. Then, on the basis of the control of the combustion control means 65, the hot water reheating operation is performed while performing the operation of the function of the high-temperature liquid circulation mode.

  Further, at the reheating timing Tb, Tc, Td, since it overlaps with the floor heating operation time and there is no bather, the reheating liquid circulation mode control means 64 performs the operation of the function of the low temperature liquid circulation mode. A command is given to the combustion control means 65 so as to replenish the bath water while continuously circulating the liquid heated to the low temperature setting temperature. Then, under the control of the combustion control means 65, a reheating operation of the bathtub hot water while performing the operation of the function of the low temperature liquid circulation mode is performed.

Furthermore, the reheating time Te, detected but overlaps with the operating time of the floor heating, there are bathing bather the 4th during the reheating operation (see T _4), the bathing by human bathing detecting means 62 Then, since a determination signal that there is a bather is applied from the bather presence / absence determination means 63 to the reheating liquid circulation mode control means 64, at this time, as in the case of the timing Ta, the reheating liquid is used. The circulation mode control means 64 gives a command to the combustion control means 65 so as to switch to the operation of the function of the high-temperature liquid circulation mode and circulate the liquid heated to the high temperature set temperature to replenish the bathtub hot water. Then, based on the control of the combustion control means 65, a reheating operation of the bathtub hot water while performing the operation of the function of the high-temperature liquid circulation mode is performed.

  In addition, unlike the example of FIG. 3, when the chasing is started according to the function of the heat retaining mode during the operation of the function of the low-temperature liquid circulation mode, there is already a bather from the bather presence / absence determining unit 63 at the start time. Is added to the liquid circulation mode control means 64 at the time of chasing (for example, when the timing of chasing is reached immediately after a person enters the bathroom or immediately after entering the bathtub 27). A command is given to the combustion control means 65 from the liquid circulation mode control means 64 at the time of reheating so that the operation is switched to the operation of the function of the high temperature liquid circulation mode from the start of firing, and the operation of the function of the high temperature liquid circulation mode is performed. Follow up while doing.

  Further, as described above, when the bath remote control device 1 issues a reheating instruction for bathing hot water rather than the output of the reheating instruction due to the operation of the warming mode function by the automatic bath operation, the bather presence / absence determining means 63 causes the bather Therefore, even if it overlaps with the floor heating operation time, the reheating liquid circulation mode control means 64 switches to the operation of the function of the high temperature liquid circulation mode and heats to the high temperature set temperature. A command is applied to the combustion control means 65 so as to circulate the liquid thus circulated through the heating liquid circulation passage 5 to replenish the bathtub hot water.

  On the other hand, when the bath remote control device 2 issues a bath hot water refill instruction, the bather presence / absence determining means 63 determines that there is no bather. The hour liquid circulation mode control means 64 gives a command to the combustion control means 65 so as to replenish the bathtub hot water while continuing the operation of the function of the low temperature liquid circulation mode and circulating the liquid heated to the low temperature set temperature. .

  Further, the reheating-time liquid circulation mode control means 64 keeps track of when the function of the low-temperature liquid circulation mode is not in operation, that is, when the operation of the bathroom heating remote control device 4 is on and the function of the high-temperature liquid circulation mode is in operation. When the rebirth command is transmitted, or when the rebirth command is transmitted when both the operation of the bathtub heating remote control device 4 and the operation of the floor heating remote control device 3 are off, the high temperature liquid circulation mode is set as in the conventional example. A command is added to the combustion control means 65 so as to recharge the bathtub hot water while performing the function operation.

  In either case, the combustion control means 65 appropriately switches to the operation of the function of the high-temperature liquid circulation mode or continues the operation of the function of the low-temperature liquid circulation mode according to the applied command, By performing the hot water bathing operation, it is possible to realize a heat source device that is easy to use and can save energy.

  In addition, this invention is not limited to the said Example, It sets suitably. For example, a plurality of temperatures such as 60.degree. C. and 40.degree. C. are set as the low temperature setting temperature when the operation of the function of the low temperature liquid circulation mode is performed. When the sowing operation is performed, a function is provided for selecting a temperature at which the heat efficiency of the heating heat exchanger 28 is highest among a plurality of low temperature setting temperatures, and the liquid heated to the selected temperature is heated by the heating liquid circulation passage 5. The bath hot water may be replenished while continuing the operation of the function of the low-temperature liquid circulation mode.

  In addition, 60 ° C. is set as the low temperature setting temperature when the operation of the function of the low temperature liquid circulation mode is performed for heating such as floor heating, and the hot water reheating operation is performed during the operation of the function of the low temperature liquid circulation mode. For example, the low temperature set temperature is set to 65 ° C as the low temperature setting temperature when the low temperature liquid circulation mode function is performed. The low temperature setting temperature may be a different value.

  Furthermore, as described above, it is better to recharge the bathtub hot water while operating the function of the low-temperature liquid circulation mode than when reheating the bathtub hot water while performing the operation of the function of the high temperature liquid circulation mode. Although the heat efficiency of the heat exchanger 28 for heating can be increased, the time required for reheating the bath hot water becomes longer, so the drive time of the bath hot water circulation pump 20 becomes longer, and power is consumed accordingly. become. Therefore, the low temperature set temperature during the operation of the function of the low temperature liquid circulation mode at the time of reheating may be set as follows.

  For example, a low-temperature set temperature at which the most energy saving is possible is obtained by experiment and stored as data in consideration of the thermal efficiency of the heat exchanger 28 for heating and the driving time of the bathtub hot water circulation pump 20. On the basis of the above, the low temperature setting temperature at the time of reheating the bath water while performing the operation of the function of the low temperature liquid circulation mode may be determined. In addition, taking into account other conditions such as room temperature when bath water is reheated, a low temperature set temperature at which the most energy saving is possible by calculation or the like is obtained at every bath water reheat timing. A function is provided, a constant temperature set temperature is obtained based on the calculated data, the liquid is heated by the heating heat exchanger 28 so as to reach the temperature, and the operation of the function of the low-temperature liquid circulation mode is performed while the bath hot water is added. You may determine the low temperature setting temperature at the time of burning.

  Furthermore, in the said Example, although the bath remote control apparatus 1 and the kitchen remote control apparatus 2 were connected to the heat source apparatus, only either one may be connected and it is arrange | positioned in the remote control apparatus and washroom which are arrange | positioned in the living room. A remote control device or the like may be connected. When the bath remote control device 1 is not connected, the kitchen remote control device 2 or the like is provided with a bath replenishment operation function or the like. Depending on whether or not bathing is detected, it is preferable to determine whether or not there is a bather when chasing the bath water.

  Furthermore, the reheating-time liquid circulation mode control means 64, when the liquid is circulated by the operation of the function of the low-temperature liquid circulation mode, the temperature detected by the bath temperature sensor 21 is higher than a predetermined bath set temperature (for example, When the temperature is lower than the set approach temperature by 2 ° C., the function is switched to the function of the high-temperature liquid circulation mode to circulate the liquid, and the function of the high-temperature liquid circulation mode is performed until the temperature detected by the bath temperature sensor 21 reaches the set approach temperature. After the liquid is circulated in the above operation, the mode may be controlled by adding a command to the combustion control means 65 so that the liquid is circulated by switching to the operation of the function of the low temperature liquid circulation mode.

  Further, in the above embodiment, the bather presence / absence judging means 63 is provided, and the reheating liquid mode control means 64 functions as a function of the low-temperature liquid circulation mode when the bather presence / absence judging means 63 judges that there is a bather. Even when bath water is refilled during operation, the hot water circulation mode is switched to the function of the high-temperature liquid circulation mode, and the liquid heated to the high temperature set temperature is circulated. When the bather presence / absence judging means 63 is omitted and the hot water bath replenishment operation is performed during the operation of the low temperature liquid circulation mode function, the hot water bath replenishment is always performed while continuing the operation of the low temperature liquid circulation mode function. You may do it.

  Furthermore, in the said Example, although the heat source device had the system configuration | structure shown in FIG. 2, the heat source device of this invention is the liquid for heating provided with the heat exchanger 28 for heating, and the liquid circulation pump 6. FIG. The circulation passage 5 and the recirculation circulation passage 13 provided with the bathtub hot water circulation pump 20 are thermally connected via heat exchange means to exchange heat between the bathtub hot water and the liquid circulating in the heating liquid circulation passage 5. As long as it has a function of exchanging heat through the means to replenish bathtub hot water, the details of the system configuration are not particularly limited, and are appropriately set.

  For example, in the above embodiment, the heating heat exchanger 28 and the hot water supply heat exchanger 29 both have a primary heat exchanger and a latent heat recovery heat exchanger (secondary heat exchanger). For example, a heat source apparatus having a system configuration as shown in FIG. In the heat source device shown in FIG. 4, when only the heating operation of the high-temperature heating device 10a is performed, the temperature of the liquid heated by the heating heat exchanger 28 and passed through the heating liquid circulation passage 5 is set to a high temperature setting temperature (for example, 80 As indicated by arrows a to e in FIG. 4 (in the order of a, b, c, d, and e), the liquid is supplied to the high-temperature heating device 10a (in the direction of the arrow b ′). Impermeable to liquid).

  When reheating bath water in this state, reheating having a forward pipe 14 and a return pipe 15 while passing the liquid heated to a high temperature setting temperature in the heating heat exchanger 28 also in the direction of the arrow b ′. The bath water is circulated through the circulation path 13. In addition, when reheating the bath water without performing heating operation of the high-temperature heating device 10a and heating of the hot water mats 10b and 10c, the liquid heated to the high temperature set temperature by the heating heat exchanger 28 is moved in the direction of arrow b. The hot water in the bathtub is circulated through the recirculation circuit 13 having the forward pipe 14 and the return pipe 15 while passing in the direction of the arrow a to the arrow b ′.

  Furthermore, when only the hot water mats 10b and 10c are heated without performing the operation of the high temperature heating device 10a or the reheating of the bathtub hot water, the temperature of the liquid heated by the heat exchanger 28 for heating is set to, for example, 80 ° C. during the hot dash operation. After the hot dash operation, the temperature of the liquid heated by the heating heat exchanger 28 is set to a low temperature setting temperature (for example, 60 ° C.), and the liquid is passed in the order of arrows a, b, and c in FIG. The liquid passing through the pipe line 96 is also merged with the liquid passing through the pipe line 95 through the direction b ', and is introduced into the hot water mats 10b and 10c through the cistern 100 as shown by arrows d → f. When reheating bath water in this state, bath water is circulated through the recirculation circuit 13 having the forward pipe 14 and the return pipe 15.

  Furthermore, in the said Example, although it was set as the composite apparatus provided with the hot water supply function, the reheating function of a bath, and the heating function, it is good also as an apparatus which does not have a hot water supply function.

  Furthermore, the heat source apparatus of the present invention may be provided with a burner for oil combustion or an electric heater (for example, a heat pump) instead of the burner that performs gas combustion provided in the above-described embodiment. Further, the liquid circulated in the heating liquid circulation passage 5 is not limited to water, and may be another liquid such as an antifreeze liquid.

  Furthermore, in the said Example, although the heating apparatus connected to a heat-source apparatus was made into a hot water mat and a bathroom heating apparatus, the connected heating apparatus is not specifically limited, It sets suitably.

  The heat source device of the present invention has a function of performing a reheating operation of bathtub hot water by exchanging heat with the liquid circulating in the heating liquid circulation passage, and appropriately controls the heating temperature of the liquid according to the reheating timing. Therefore, waste of energy can be reduced, so that it can be used as a heat source device for home use, for example.

DESCRIPTION OF SYMBOLS 1 Bath remote control device 2 Kitchen remote control device 3 Floor heating remote control device 4 Bathroom heating remote control device 5 Heating liquid circulation passage 6 Liquid circulation pump 7 Liquid-liquid heat exchanger 10 Heating device 13 Reheating circulation passage 16 Burner 17 Burner 20 Bath water Circulation pump 21 Bath temperature sensor 22 Water level sensor 28 Heating heat exchanger 33 Heating high temperature thermistor 36 Heating low temperature thermistor 60 Control means 62 Person bathing detection means 63 Bathing person presence / absence judgment means 64 Reheating liquid circulation mode control means 65 Combustion control means

Claims (5)

  A heating liquid circulation passage having a function of circulating liquid and supplying the heating device and a recirculation circulation passage connected to the bathtub; the recirculation circulation passage through the heat exchange means; A liquid circulation passage that is thermally connected to the liquid circulation passage for heating, a liquid circulation pump that circulates the liquid in the liquid circulation passage for heating, and a heating that heats the liquid circulated by driving the liquid circulation pump A hot water circulation pump is provided in the recirculation circulation passage to circulate the bath hot water, and the heating liquid is received by the heating heat exchanger in response to a reheating instruction of the bath hot water. The liquid in the circulation passage is circulated while heating, and the bathtub hot water is circulated through the recirculation circulation passage, whereby the heat exchange means connects the bathtub hot water and the liquid circulating in the heating liquid circulation passage. A heat source device having a function of exchanging heat through the hot water of the bathtub and heating the liquid to a high temperature set temperature predetermined by the heat exchanger for heating. Function of circulating high-temperature liquid circulation mode, and low-temperature liquid circulation in which the liquid is heated in the heating liquid circulation passage by heating the liquid to a predetermined low-temperature set temperature lower than the high-temperature set temperature by the heating heat exchanger And when the bath hot water replenishment operation is performed during the operation of the function of the low-temperature liquid circulation mode, the operation of the function of the low-temperature liquid circulation mode is continued and heated to the low temperature setting temperature. The liquid is circulated in the heating liquid circulation passage, and the hot water of the bathtub is replenished by heat exchange between the liquid and the hot water of the bathtub. When the bath hot water replenishment operation is performed at a time other than during the operation, the liquid is circulated through the heating liquid circulation passage in the high-temperature liquid circulation mode, and the bath hot water is replenished by heat exchange between the liquid and the bath hot water. A heat source device characterized by having a recirculation-time liquid circulation mode control means for performing the firing.   When there is a bather presence / absence judgment means for judging whether or not there is a bather at the time of bathing hot water bathing operation, the liquid mode control means at the time of chasing is determined that the bather is present by the bather presence / absence judgment means Even when the hot water bathing operation is performed during the operation of the cold liquid circulation mode function, the hot water circulation mode is switched to the hot liquid circulation mode function operation to circulate the liquid heated to the high temperature setting temperature and follow the hot water bath operation. The heat source device according to claim 1, wherein the heating is performed.   A water level sensor for detecting the water level of the bath water, and a human bath detection means for detecting that a person is bathing in the bathtub based on the detected water level of the water level sensor, It is determined that there is a bather when the bathing of the person into the bathtub is detected by the detection means, and it is determined that there is no bather when the bathing of the person into the bathtub is not detected by the bathing detection means. The heat source device according to claim 2, characterized in that:   A remote control device in the bathroom and a remote control device in the kitchen are signal-connected to the heat source device, and the bather presence / absence determining means is provided when the bather retreats the bath water by the remote control device in the bathroom. 4. The heat source device according to claim 2 or 3, wherein it is determined that there is no bather when a remote hot water bathing instruction is issued by the remote controller disposed in the kitchen.   The bath water temperature detecting means for detecting the temperature of the hot water in the bathtub has a temperature detecting means for detecting the temperature of the hot water in the bath hot water when the liquid is circulated in the low temperature liquid circulation mode. When the temperature is lower than the set approach temperature lower than the set bath set temperature, the liquid is circulated by switching to the high temperature liquid circulation mode, and the hot liquid is detected until the temperature detected by the bath water temperature detecting means reaches the set approach temperature. The heat source device according to any one of claims 1 to 4, wherein the liquid is circulated by switching to the low-temperature liquid circulation mode after the liquid is circulated in a circulation mode.

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