JP2013250023A - Heat source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat source device configured to perform freezing prevention of a drain neutralizer provided in the heat source device even without an electric heater, and thereby to reduce the cost.SOLUTION: In a cistern tank 100 provided in a liquid circulation passage having a circulation function for heated liquid, a liquid storage chamber 2 for storing liquid passing in the liquid circulation passage and a drain neutralizer 76 for neutralizing drain produced in a latent heat recovery heat exchanger are partitioned and provided, and the drain neutralizer 76 and the cistern tank 100 are formed as an integrated unit 12. The integrated unit 12 is provided with an overflow chamber 4 for liquid having overflown from the liquid storage chamber 2, and is configured such that a drain having passed through the drain neutralizer 76 flows into the overflow chamber 4, and the liquid and drain are discharged from a liquid discharge part 9. Between the drain neutralizer 76 and the liquid storage chamber 2, a spacing 3 is provided for preventing direct transmission of heat from liquid in the liquid storage chamber 2 to the drain in the drain neutralizer 76.

Description

  The present invention relates to a heat source device having a function of heating a liquid circulating in a liquid circulation passage and capable of supplying the heated liquid to a hot water mat or the like, for example.

  FIG. 7 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 interposed in a liquid circulation passage 5 provided with a cistern tank 100 and a liquid circulation pump 6, and the liquid circulation passage 5 is provided in an instrument case 42. Pipes 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 and pipes 40, 41, 44, 45, 59 of external passages provided outside the instrument case 42, A low-temperature capacity switching thermal valve 47 is interposed in the pipe line 98. A liquid heating circulation circuit that circulates the heated liquid is formed by including the liquid circulation passage 5 and the heating heat exchanger 28.

  The liquid circulation passage 5 circulates a liquid (for example, hot water) through the hot water mat 10 and a high-temperature heating device 106 such as a bathroom heater by driving the liquid circulation pump 6. The high-temperature heating device 106 is provided with an internal passage 51, and a thermal valve 112 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, and one of the conduits 91 is a heating heat exchanger 28 b for heating the liquid circulating in the liquid circulation passage 5. The liquid is introduced to the side, and the other conduit 90 supplies the liquid to the hot water mat 10. 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 heat exchanger 28b for heating, and a heat exchanger outlet temperature detection for detecting the temperature of the liquid led out through the heater heat exchanger 28b in the conduit 92. A heating high temperature thermistor 33 is provided as a means.

  Further, a liquid branching means 37 is provided in the pipe line 90, the pipe line 90 is connected to the pipe line 45 through the liquid branching means 37, and the water inlet side of the hot water mat 10 is connected to the pipe line 45. An internal passage 52 is formed in the hot water mat 10, and the water discharge side of the hot water mat 10 is connected to the pipe line 95 through the pipe 44, the liquid merging 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 a liquid overflow passage 53 overflowing from the cistern tank 100 due to, for example, volume expansion of the liquid is connected to the cistern tank 100. The tip 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 hot water supply heat exchanger 29 a, and the drain collected by the drain collecting means 39 is introduced into the drain neutralizer 76 through the drain discharge passage 75. After being neutralized by the drain neutralizer 76, the water is guided 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).

  In the system configuration diagram shown in FIG. 7, the drain neutralizer 76 and the cistern tank 100 are shown to be provided at positions separated from each other. For example, as shown in the perspective view of FIG. 8, There has also been proposed a heat source device in which the drain neutralizer 76 and the cistern tank 100 are disposed at close positions. In such a heat source device, a drain discharge passage 77 through which the drain neutralized by the drain neutralizer 77 is connected to the overflow passage 53 connected to the cistern tank 100 via the joint 110 is performed. .

  As shown in FIG. 7, a water supply passage 88 is provided on the inlet side of the hot water supply heat exchanger 29a, and the amount of hot water supplied to the water supply passage 88 is detected by detecting the amount of hot water flowing through the water supply passage 88. A flow rate detecting means 73 for detecting the incoming water temperature, an incoming water temperature sensor 74 for detecting the incoming water temperature, and a water amount servo 69 for varying the hot water supply flow rate are provided. Further, the 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 thermally connected to the liquid circulation path 5 via the heat exchanger 7. Has been. The 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 liquid circulation path 5. 7 is provided with a flow control valve 38 on the inlet side. The reheating circulation path 13 is provided with a bathtub hot water circulation pump 20 that circulates bathtub hot water. The heat exchanger 7 circulates in the recirculation circulation path 13 by driving the bathtub hot water circulation pump 20 and passes through the liquid circulation path 5. The bath water is heated by heat exchange with the liquid.

  Further, in the reheating circuit 13, 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 reheating 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. Note that the hot water supply heat exchanger 29, the hot water supply passage 26 and the pipe 54, the hot water supply unit 55, the hot water introduction passage 23 for the bath, the hot water circulating pump 20 for the bath, the heat exchanger 7 and the outgoing pipe 14 are sequentially passed to the bathtub 27. A hot water filling water passage for performing hot water filling and water pouring is constituted by the passages leading up to.

  In the heat source device as shown in FIG. 7, for example, when performing a heating operation of the high-temperature heating device 106 and a reheating operation of bath water, the heating heat exchanger 28 is heated by the heating burner 16. When the temperature of the liquid passing through the heating liquid circulation passage 5 is set to a predetermined high temperature setting temperature (for example, 80 ° C.) and the high temperature heating device 106 is heated, the liquid is pumped by driving the liquid circulation pump 6. The liquid is circulated as shown by arrows A to F in FIG. At this time, the liquid circulates through the cistern 100 as indicated by arrows D and E in FIG.

  Further, in this state, when performing the reheating operation of the bathtub hot water, the liquid passing through the pipe 92 is passed through the pipe 97 as shown by the arrow B in FIG. 7 and the flow control valve 38 is opened. As shown by the arrow B ′, the bath hot water circulation pump passes through the pipe 89 side and the liquid flowing to the pipe 89 side (the heat exchanger 7 side) returns to the pipe 95 through the pipe 96. 20 is driven to circulate the bath water as indicated by an arrow H in FIG. 7, and the liquid passing through the liquid circulation passage 5 and the reheating circulation passage through the heat exchanger 7 (liquid-liquid heat exchanger). By the heat exchange with the bathtub hot water passing through 13, the bath hot water reheating operation is performed until the temperature of the hot water in the bathtub 27 (detected temperature of the bath temperature sensor 21) becomes the bath set temperature.

  Further, when only the reheating operation of the bath water is performed without performing the heating operation of the high temperature heating device 106, the heating valve 112 of the high temperature heating device 106 is closed, so that the heating heat exchanger 28b is heated. After a liquid having a high set temperature (for example, a liquid at 80 ° C.) passes through the pipe line 92 as shown by an arrow A, it does not pass through the pipe line 97, but as shown by an arrow B ′ in FIG. Pass through the road 89 side. In the same manner as described above, this liquid and the hot water in the bathtub are subjected to heat exchange through the heat exchanger 7 so that the hot water in the bathtub 27 is replenished.

  Further, when only the hot water mat 10 is heated without heating the high-temperature heating device 106 or reheating the bathtub hot water, except for the hot dash operation performed until the inside of the pipe is warmed, The liquid is heated by the heating burner 16, and the liquid passing through the liquid circulation passage 5 is set to arrows C, D, E, and F in FIG. 7 as a predetermined low temperature setting temperature (for example, 60 ° C.) lower than the high temperature setting temperature. Cycle as shown. Then, by opening the low-temperature capacity switching thermal valve 47, the liquid that has passed through the pipe 92 is introduced into the pipe 98 as shown by the arrow A 'in the figure, and is directed from the cistern 100 side toward the liquid circulation pump 6 side. Along with the liquid passing as shown by the arrow E in the figure, the liquid is introduced into the hot water mat 10 sequentially through the pipes 90 and 45 through the liquid circulation pump 6 as shown by the arrow G in the figure. The liquid that has passed through the hot water mat 10 returns to the pipe line 95 via the pipe line 44 and the liquid merging means 115.

  At the time of 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 liquid is supplied by the low temperature heating pattern while the detected temperature is about 80 ° C. Circulate. Then, when the liquid returned from the hot water mat 10 passes through the pipelines 44 and 95 and further returns to the systern 100 through the pipeline 94 as shown by the arrow D, it comes out of the heating heat exchanger 28b. The liquid passing through the pipe 92 is mixed with the pipe 94 through the pipe 98 as shown by an arrow A ′ in FIG. 7, and the temperature of the liquid becomes lower than 80 ° C., and the liquid is circulated through the cistern 100. When it is sent to the hot water mat 10 via the pump 6, it becomes a liquid of about 70 ° C.

Japanese Patent No. 3153361

  By the way, the appliance case 42 of the heat source device is normally installed outdoors, so that the drain stored in the drain neutralizer 76 in the appliance case 42 is frozen in the cold so that it does not freeze in winter. Prevention is necessary, and conventionally, an electric heater is provided on the outer periphery of the drain neutralizer 76 to prevent the drain from freezing. However, in order to prevent freezing with an electric heater, there is a problem that a large amount of electric power is required to energize the electric heater, the electricity cost is high, and the energy consumption is also increased.

  In addition, the heat source device is provided with a pipe for providing a drain neutralizer 76 to guide the drain to the drain, and a pipe for providing the cistern tank 100 to guide the liquid overflowing from the cistern tank 100 to the drain. Therefore, for example, as shown in FIG. 8, it is necessary to arrange and connect many hoses and pipes in the instrument case 42, which causes an increase in the number of parts and assembly man-hours. There was also a problem that led to an increase in cost.

  The present invention has been made in order to solve the above-described problems, and the object thereof is to prevent the drain neutralizer provided in the heat source device from being frozen without an electric heater. An object of the present invention is to provide a heat source device that can simplify the configuration of piping connected to a tank and thereby reduce costs.

  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 a liquid circulation passage that includes a liquid circulation pump that circulates the liquid and circulates the liquid by driving the liquid circulation pump, and a heating unit that heats the liquid circulated through the liquid circulation passage. A latent heat recovery heat exchanger that recovers the latent heat of exhaust from the burner, the liquid circulation passage having a cistern tank, and the latent heat recovery heat exchanger in the cistern tank; A drain neutralizer for neutralizing drain generated in the liquid is provided separately from the liquid storage chamber for storing the liquid, and the drain neutralizer and the cistern tank are formed as an integrated unit, and the liquid storage chamber Is arranged in the liquid circulation passage so that the liquid circulates through the liquid storage chamber, and the integral unit has an overflow of liquid overflowing from the liquid storage chamber. A flow chamber is provided so that drain that has passed through the drain neutralizer enters the overflow chamber, and between the drain neutralizer and the liquid storage chamber, the liquid is supplied from the liquid in the liquid storage chamber. An interval is provided to prevent heat from being directly transferred to the drain in the neutralizer, and the liquid discharge unit for discharging the liquid and the drain from the overflow chamber is provided. As a means to solve.

  In addition to the structure of the first invention, the second invention has a recirculation circuit that is connected to the bathtub and has a function of circulating the bath water, and the liquid discharge section includes the liquid discharge section. A conduit for guiding the liquid and drain discharged from the recirculation circuit to the recirculation circuit is connected to the recirculation circuit through a switching valve, and the recirculation circuit is connected to the recirculation circuit from the conduit. A discharge pipe for discharging the introduced liquid and drain to the bathroom without putting it in the bathtub is provided through a three-way valve.

  Furthermore, the third invention includes a liquid circulation passage that includes a liquid circulation pump that circulates the liquid and circulates the liquid by driving the liquid circulation pump, and a heating unit that heats the liquid circulated through the liquid circulation passage. A latent heat recovery heat exchanger that recovers the latent heat of exhaust from the burner, the liquid circulation passage having a cistern tank, and the latent heat recovery heat exchanger in the cistern tank; A drain neutralizer for neutralizing drain generated in the liquid is provided separately from the liquid storage chamber for storing the liquid, and the drain neutralizer and the cistern tank are formed as an integrated unit, and the liquid storage chamber Is arranged in the liquid circulation passage so that the liquid circulates through the liquid storage chamber, and the liquid in the liquid storage chamber is interposed between the liquid storage chamber and the drain neutralizer. A space for preventing heat from being directly transferred to the drain in the drain neutralizer, a liquid discharge section for discharging the liquid overflowing from the liquid storage chamber, and the drain neutralizer A configuration in which a drain discharge portion that discharges the drained drain is provided separately serves as a means for solving the problem.

  Furthermore, the fourth invention has a recirculation circuit having a function of circulating the bath water connected to the bathtub in addition to the configuration of the third invention, and the drain discharge portion includes the drain discharge portion. A conduit for leading drain discharged from the recirculation circuit to the recirculation circuit is connected to the recirculation circuit via a switching valve, and the recirculation circuit is introduced from the conduit to the recirculation circuit. A drain line for discharging the drain to the bathroom without putting it in the bathtub is provided via a three-way valve.

  According to the present invention, a cistern tank is provided in a liquid circulation passage that heats while circulating a liquid, and in the cistern tank, there is a drain medium that neutralizes the drain generated in the latent heat recovery heat exchanger. The sump is provided separately from the liquid storage chamber that stores the liquid that is passed through the cistern tank, and the drain neutralizer and the cistern tank are formed as an integrated unit. The drain neutralizer can be warmed by the liquid to be discharged, and the electricity bill can be reduced as compared with the configuration in which the drain neutralizer is prevented from freezing by the electric heater.

  Note that the heat for warming the drain of the drain neutralizer may be heat that can prevent the drain from freezing. If more heat is transferred to the drain, the heat is wasted. For example, by providing an interval between the drain neutralizer and the liquid storage chamber to prevent heat from being directly transferred from the liquid in the liquid storage chamber to the drain in the drain neutralizer, Excessive heating of the drain of the drain neutralizer is suppressed by the heat of the liquid in the storage chamber, and waste of heat can be suppressed. In other words, if the heat of the liquid circulating in the liquid circulation passage is excessively transmitted to the drain side and the temperature of the liquid becomes low, a lot of heat is required to heat the liquid. By providing the space between the liquid storage chamber and the liquid storage chamber, heat transfer from the liquid to the drain is appropriately performed, so that such waste can be eliminated.

  In addition, by making the cistern tank and the drain neutralizer an integral unit, this integral unit can be used as a means for recovering drain from the latent heat recovery heat exchanger, a liquid circulation passage, and a discharge port for liquid and drain. Therefore, the piping configuration in the heat source device can be simplified, and accordingly, the number of parts and the number of assembly steps can be reduced, and the cost can be reduced.

  Furthermore, a liquid overflow chamber overflowing from the liquid storage chamber is provided so that drain that has passed through the drain neutralizer enters the overflow chamber, and the liquid and the drain are discharged from the overflow chamber. By providing the portion, both the liquid and the drain can be discharged from the liquid discharge portion. Therefore, the piping structure can be made with one pipe connecting the liquid discharge portion and the discharge portion such as the liquid and drain discharge port. It can be simplified.

  In addition, a recirculation circuit that is connected to the bathtub and has a function of circulating the bathtub water is provided, and the drain and liquid discharged from the integrated unit of the drain neutralizer and the cistern tank are passed through the conduit and the switching valve. In this way, liquid and drain can be discharged into the bathroom through the recirculation circuit and the discharge passage connected to the recirculation circuit, for example, an apartment, etc. Even if it is not preferable to discharge the drain or the like from the heat source device to a common part such as a veranda in the apartment house, the drain or the like can be discharged without any trouble.

It is a typical perspective view which shows the structure of the integral unit of the cistern tank and drain neutralizer provided in one Example of the heat source apparatus which concerns on this invention, and its connection structure. The typical perspective view (a) and sectional view (b) which show the example of composition of the integral unit of the cistern tank and drain neutralizer provided in the heat source device concerning the present invention except for the upper surface part of the integral unit is there. It is explanatory drawing which shows typically the system configuration | structure of one Example of a heat-source apparatus, and the operation example. It is explanatory drawing which shows a partial structure of the system configuration example in the other Example of a heat-source apparatus. It is typical sectional explanatory drawing which shows the structural example of the cistern tank provided in the further another Example of a heat-source apparatus. It is a typical perspective view which shows the structural example of the cistern tank provided in the further another Example of a heat-source apparatus, and its connection structure. 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 typically the example of the external appearance structure of a cistern tank and the drain neutralizer provided in the conventional heat-source apparatus, and a piping connection structure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 3 shows a system configuration of the heat source apparatus according to the present invention. The system configuration of the heat source apparatus of the present embodiment is substantially the same as that of the heat source apparatus shown in FIG. 7, but in this embodiment, the cistern tank 100 and drain neutralization that have conventionally been provided separately are provided. The unit 76 is formed as a cistern tank 100 of the integrated unit 12 as shown in FIG. 1 so as to simplify the configuration, save energy, and reduce the cost. That is, in this embodiment, as shown in FIGS. 1 to 3, the drain generated in the heat exchangers 28 a and 29 a for recovering latent heat is neutralized in the cistern tank 100 provided in the liquid circulation passage 5. A drain neutralizer 76 filled with a drain neutralizer (not shown) is provided.

  As shown in FIGS. 1 and 2, the drain neutralizer 76 has a liquid storage chamber 2 for storing the liquid introduced into the cistern tank 100 (liquid circulating in the liquid circulation passage 5) and left and right (X in the figure). The cistern tank 100 is formed as an integrated unit 12 with the drain neutralizer 76. Further, an interval 3 is provided between the drain neutralizer 76 and the liquid storage chamber 2 to prevent heat from being directly transferred from the liquid in the liquid storage chamber 2 to the drain in the drain neutralizer 76. It has been. The drain neutralizer 76 is provided with a partition wall 101 (not shown in FIG. 1) extending from the upper end portion to the lower end side, and the lower end of the partition wall 101 is the bottom surface of the drain neutralizer 76. The drain flows as shown by an arrow Do in FIG. 2 through this interval.

  In this cistern 100, the liquid circulating in the liquid circulation passage 5 is introduced into the liquid storage chamber 2 from the conduit 94 of the liquid circulation passage 5, as indicated by the arrow D in FIGS. As shown in FIG. 5, the liquid is stored in the liquid storage chamber 2 and led out to the pipe 93 of the liquid circulation passage 5. That is, the liquid storage chamber 2 is interposed in the liquid circulation passage 5, and the liquid circulates through the liquid circulation passage 5 through the liquid storage chamber 2.

  Further, the integrated unit 12 is provided with an overflow chamber 4 into which the liquid overflowing from the liquid storage chamber 2 flows, for example, as shown by an arrow L in FIG. 2, and between the overflow chamber 4 and the liquid storage chamber 2. The upper end of the wall is formed to be lower than the wall between the liquid storage chamber 2 and the drain neutralizer 76. The overflow chamber 4 is also adjacent to the drain neutralizer 76, and the wall between the overflow chamber 4 and the drain neutralizer 76 is also higher than the wall between the liquid storage chamber 2 and the drain neutralizer 76. The drain which is formed low and passes through the drain neutralizer 76 enters the overflow chamber 4 as indicated by an arrow Do.

  Furthermore, the integrated unit 12 is provided with a liquid discharge portion 9 through which the liquid and drain are discharged from the overflow chamber 4, and the liquid discharge portion 9 has an overflow pipe 53 (liquid and drain discharge conduit). Is connected. The overflow pipe 53 is connected to a drain outlet outside the heat source device, for example.

  In addition, this invention is not limited to the said Example, It sets suitably. For example, as shown in FIG. 4, an overflow pipe 53 that guides the liquid and drain discharged from the liquid discharge unit 9 to the recirculation circuit 13 may be connected to the recirculation circuit 13 via the switching valve 104. . In this case, when the liquid circulating in the liquid circulation passage 5 is water, the liquid or drain may be discharged to the bathtub 56 via the overflow pipe 53 and the recirculation circulation path 13. After the flow, water (both hot water and unheated water may be used) may be allowed to flow through the recirculation circuit 13 to clean the piping.

  When the liquid is a liquid such as an antifreeze liquid, as shown in FIG. 4, the liquid and drain introduced into the reheating circulation path 13 and the recirculation circulation path 13 from the overflow pipe 53 are supplied to the bathtub 27. A discharge pipe 102 for discharging to the bathroom without entering is provided via a three-way valve 103. In this way, even if the stopper of the bathtub 56 has not been removed, as shown by the arrow, the liquid such as drain or antifreeze can be discharged into the bathtub 56 by discharging the liquid into the bathroom via the discharge pipe 102. Can be prevented from being introduced. This configuration can also be applied when the liquid is water.

  Further, in the above embodiment, the liquid storage chamber 2 and the drain neutralizer 76 of the cistern tank 100 are arranged separately on the left and right (X direction in FIG. 2). Is not particularly limited, and is appropriately set. The liquid storage chamber 2 and the drain neutralizer 76 are disposed separately, and the liquid storage chamber 2 and the drain are disposed in the drain. A gap 3 for preventing heat from being directly transferred from the liquid storage chamber 2 to the drain neutralizer 76 may be provided between the sump 76.

  That is, for example, as shown in FIGS. 5A and 5B, the liquid storage chamber 2 and the drain neutralizer 76 may be arranged separately in the vertical direction (Z direction in the figure). As shown in (c), the liquid storage chamber 2 surrounds the drain neutralizer 76 and may be disposed separately, and conversely, as shown in FIG. The liquid storage chamber 2 may be disposed so as to be separated in such a manner that the liquid storage chamber 2 is surrounded by the drain neutralizer 76. In FIG. 5, an arrow Do indicates a drain flow, and an arrow L indicates a liquid flow.

  Furthermore, in the above embodiment, the overflow chamber 4 is provided in the cistern tank 100 (integrated unit 12), but the overflow liquid is discharged from the liquid storage chamber 2 as shown in FIG. The liquid discharger 9 that discharges and the drain discharger 105 that discharges the drain that has passed through the drain neutralizer 76 may be provided separately.

  In the case of such a configuration, as shown by a broken line portion in FIG. 6, a pipe (drain discharge passage) 77 that guides the drain discharged from the drain discharge portion 105 to the recirculation circuit 13. Is connected to the recirculation circuit 13 through the switching valve 104, so that the drain can be discharged through the recirculation circuit 13. Also in this case, similarly to the configuration shown in FIG. 4, the discharge conduit 102 is connected to the recirculation circuit 13 via the three-way valve 103, and is introduced into the recirculation circuit 13 from the drain discharge passage 77. The drain can be discharged into the bathroom without entering the bathtub 56. Note that the drain discharge passage 77 may be connected so as to merge with the overflow pipe 53 as indicated by a broken line A in FIG.

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

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

  Furthermore, the device connected to the liquid circulation passage of the heat source device of the present invention is not limited to the hot water mat 10 or the high-temperature heater, but is connected to a device such as an appropriate heating device. Moreover, you may form a heat source apparatus by connecting the liquid circulation channel | path other than a heating apparatus, for example, a bathroom drying apparatus, the heat collector which collects the heat of sunlight, etc., for example.

  The heat source device of the present invention does not require an electric heater for preventing the drain neutralizer from freezing, and the arrangement configuration of the cistern tank and the drain neutralizer can be simplified and the cost can be reduced. For example, the heat source device for home use Available as

DESCRIPTION OF SYMBOLS 1 Heat source device 2 Liquid storage chamber 3 Gap 4 Overflow chamber 5 Liquid circulation passage 6 Liquid circulation pump 9 Liquid discharge part 10 Hot water mat 12 Integrated unit 13 Reheating circulation passage 16 Heating burner 53 Overflow pipe 76 Drain neutralizer 77 Drain discharge Passage 100 Sisturn tank 103 Three-way valve 104 Switching valve

Claims (4)

  A liquid heating circulation circuit having a liquid circulation pump that circulates the liquid and having a liquid circulation passage that circulates the liquid by driving the liquid circulation pump; and a heating unit that heats the liquid that circulates through the liquid circulation passage; A latent heat recovery heat exchanger that recovers the latent heat of exhaust gas is provided, and a cistern tank is provided in the liquid circulation passage, and the drain generated in the latent heat recovery heat exchanger is neutralized in the cistern tank. A drain neutralizer is provided separately from the liquid storage chamber for storing the liquid, and the drain neutralizer and the cistern tank are formed as an integrated unit, and the liquid storage chamber is provided in the liquid circulation passage. The liquid circulates through the liquid storage chamber, and the integrated unit is provided with an overflow chamber for liquid overflowing from the liquid storage chamber. The drain flow through the drain neutralizer enters the bar flow chamber. Between the drain neutralizer and the liquid storage chamber, the liquid from the liquid storage chamber is transferred to the drain in the drain neutralizer. An interval for preventing heat from being directly transmitted, and a liquid discharge part for discharging the liquid and the drain from the overflow chamber is provided.   A recirculation circuit connected to the bathtub and having a function of circulating the bath water is switched, and the liquid discharge part is switched with a pipe for guiding the liquid and drain discharged from the liquid discharge part to the recirculation circuit. The recirculation circuit is connected to the recirculation circuit via a valve, and the recirculation circuit is a discharge that discharges the liquid and drain introduced from the pipe to the recirculation circuit into the bathroom without entering the bathtub. The heat source apparatus according to claim 1, wherein the pipe line is provided via a three-way valve.   A liquid heating circulation circuit having a liquid circulation pump that circulates the liquid and having a liquid circulation passage that circulates the liquid by driving the liquid circulation pump; and a heating unit that heats the liquid that circulates through the liquid circulation passage; A latent heat recovery heat exchanger that recovers the latent heat of exhaust gas is provided, and a cistern tank is provided in the liquid circulation passage, and the drain generated in the latent heat recovery heat exchanger is neutralized in the cistern tank. A drain neutralizer is provided separately from the liquid storage chamber for storing the liquid, and the drain neutralizer and the cistern tank are formed as an integrated unit, and the liquid storage chamber is provided in the liquid circulation passage. The liquid is circulated through the liquid storage chamber, and the drain neutralizer is disposed between the liquid storage chamber and the drain neutralizer from the liquid in the liquid storage chamber. An interval is provided to prevent heat from being directly transmitted to the drain of the liquid, and the drain discharged from the liquid storage chamber and the drain through the drain neutralizer are discharged. A heat source device, wherein the drain discharge unit is provided separately.   A recirculation circuit that is connected to the bathtub and has a function of circulating the bath water, and the drain discharge portion includes a switching valve that is connected to a pipe that guides drain discharged from the drain discharge portion to the recirculation circuit. The exhaust circuit is connected to the recirculation circuit via the three-way valve, and the recirculation circuit has a three-way valve for discharging the drain introduced from the conduit into the recirculation circuit into the bathroom without entering the bathtub. The heat source device according to claim 3, wherein the heat source device is provided via

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