JP4870982B2 - Drain processing device, heat source device, and drain processing method - Google Patents

Description

The present invention relates to treatment of drain generated by heat exchange or the like, and relates to, for example, a drain treatment apparatus, a heat source apparatus, and a drain treatment method for performing treatment such as sterilization and discharge of drain generated in a heat exchanger by latent heat recovery.

  Generally, in a heat exchanger that recovers latent heat from combustion exhaust gas, drainage is generated by the heat exchange, and measures for drainage are indispensable. The drain is highly acidic because nitrogen oxides and the like in the combustion exhaust gas dissolve, and is discarded after neutralization.

Regarding such drain treatment, a hot water supply device (Patent Document 1) that discharges through a neutralization treatment has been proposed.
JP 2001-263789 A (paragraph number 0007, FIG. 1 etc.)

  By the way, if the drain after neutralization is stored in a tank in a large amount and left for a long time, there is a risk that germs and the like will propagate. In particular, the contamination will be remarkable in an environment where appropriate heat is applied and in summer. Further, since the heat source device is generally installed outdoors, it is not negligible that rainwater or dust in the air enters from the exhaust port and contaminates the neutralized drain.

  In addition, a bath apparatus using a heat source device is equipped with a number of piping facilities such as drain pipes, and it is possible to pour neutralized drain into the bathtub, but the neutralized drain bathtub Emissions to have been avoided.

  Regarding such a problem, the above-mentioned Patent Document 1 has no disclosure, and there is no disclosure of means or an idea for solving it.

  Then, this invention relates to the drain generate | occur | produced by heat exchange, and aims at implement | achieving easy drain discharge.

Another object of the present invention is to simplify the piping configuration of the heat source device.

  The configurations of the present invention for achieving the above object are listed as follows.

A first aspect of the present invention for achieving the above object is a drain treatment apparatus for treating drain generated by heat exchange, and neutralizing means for neutralizing the drain, and neutralizing by the neutralizing means A drain tank for storing the drain , and sterilization for starting sterilization of the drain in the drain tank after the level of the drain stored in the drain tank reaches a reference level, and sterilizing the drain for a predetermined time or more Means. In such a configuration, since the drain is sterilized, bacterial growth is suppressed, and the sterilized drain can be discharged through a bathtub or the like, and the processing becomes easy. Therefore, the above object can be achieved by such a configuration.

  In this drain processing apparatus, based on the detection means for detecting the drain level of the drain tank, a discharge path connected to the drain tank for discharging the drain from the drain tank, and the detection level of the detection means, It is good also as a structure provided with the control means which controls the drain discharge of the said discharge path. Such a configuration can also achieve the above object.

  In this drain treatment apparatus, the discharge path is configured by a part or all of a reheating circuit of a heat source device that heats the bath water, and the control means controls the drain discharge according to the discharge of the bath water. It is good also as a structure to perform. With such a configuration, the above object can be achieved.

  In this drain treatment apparatus, the control means may be configured to discharge the drain of the drain tank from the discharge passage when the bathtub is below a predetermined water level. Such a configuration can also achieve the above object.

  In this drain treatment apparatus, a configuration using a photocatalyst as the sterilization means may be adopted. Such a configuration can also achieve the above object.

  In this drain treatment apparatus, the sterilization unit may include a light source that emits ultraviolet rays. Such a configuration can also achieve the above object.

In order to achieve the above object, a second aspect of the present invention includes a heat exchanger that recovers latent heat from combustion exhaust, and heat source that heats water, bath water, or a heating medium by heat exchange. An apparatus for neutralizing drain generated by the heat exchange; a drain tank for storing the drain neutralized by the neutralizing means; and a level of the drain stored in the drain tank. And a sterilization unit that starts sterilization of the drain in the drain tank after reaching a reference level and sterilizes the drain for a predetermined time or longer . With such a configuration, the above object can be achieved.

  In this heat source device, based on the discharge path for discharging the drain from the drain tank, the detection means for detecting the level of the drain in the drain tank, and the detection level of the detection means, the drain of the drain from the discharge path It is good also as a structure provided with the control means which controls discharge | emission. Such a configuration can also achieve the above object.

  In this heat source device, the discharge path is configured by a part or all of a memory circuit that circulates the bathtub water to the heat exchanger, and the control means is configured to control the drain tank according to discharge of the bathtub water. The drain may be discharged. Such a configuration can also achieve the above object.

The third aspect of the present invention for achieving the above object is a drain treatment method for treating drain generated by heat exchange, comprising: neutralizing the drain; and storing the drain in a drain tank. , Starting the sterilization of the drain in the drain tank after the level of the drain stored in the drain tank reaches a reference level, and sterilizing the drain for a predetermined time or more . With such a configuration, the above object can be achieved.

  The drain processing method may include a process for detecting a drain level in the drain tank and a process for discharging the drain from the drain tank based on the drain level. Such a configuration can also achieve the above object.

  In this drain processing method, as a configuration including a process of discharging the drain of the drain tank according to the discharge of the bath water through a part or all of a memory circuit that circulates the bath water heated by the heat exchange Also good. With such a configuration, the above object can be achieved.

In this drain processing method, the drain may be discharged to the bathtub when the water level of the bathtub water is equal to or lower than a predetermined water level. With such a configuration, the above object can be achieved.

  According to the present invention, the following effects can be obtained.

  (1) Since the neutralized drain is sterilized, there is no inconvenience such as drain decay and the process is facilitated.

  (2) The drainage can be discharged through the bathtub and the piping configuration can be simplified, such as using existing piping equipment.

(3) If the drain is discharged from the drain tank in synchronization with the drainage timing of the bath water, the drain can be discharged efficiently.

[First Embodiment]

  A first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing a hot water supply / remembrance device according to the first embodiment.

  The hot water supply / remembrance device 2 is an example of a heat source device including a drain treatment device, and has a hot water supply function using clean water and a bath water replenishment function. The heat source device may have a heating function using heated hot water as a heat medium.

  The hot water supply / remembrance device 2 is provided with a heat exchanger 8 for reheating together with a primary heat exchanger 4 and a secondary heat exchanger 6 as heat exchangers for hot water supply. The primary heat exchanger 4 and the secondary heat exchanger 6 are installed in a common hot water combustion chamber 10, and the primary heat exchanger 4 is mainly produced by sensible heat of the combustion exhaust 14 obtained by gas combustion of the burner 12. The heat exchange is performed, and the secondary heat exchanger 6 performs heat exchange mainly from the combustion exhaust 14 by latent heat.

  The clean water W supplied from the water supply port 16 is heated by the secondary heat exchanger 6 and the primary heat exchanger 4 in the hot water supply passage 18, is supplied with hot water from the hot water supply port 20, and is also a memorial circuit from the pouring pipe 21. It is led to 22 and hot water is also supplied to the bathtub 24 as needed. In the hot water supply path 18, a flow sensor 26, temperature sensors 28, 30, 32, a water control valve 34, an overpressure relief valve 36 are provided, and a bypass pipe 38 is formed across the primary heat exchanger 4, The bypass pipe 38 is provided with a bypass water control valve 40. In addition, a pouring electromagnetic valve 42, a pouring amount sensor 44, and a check valve 46 are provided in the pouring pipeline 21.

  The flow rate sensor 26 electrically detects the flow rate of the clean water W flowing through the hot water supply path 18 and outputs the detected flow rate as an electrical signal. The temperature sensor 28 detects the temperature of the hot water on the outlet side of the secondary heat exchanger 6 and outputs the detected temperature as an electrical signal. The temperature sensor 30 detects the temperature of the hot water on the outlet side of the primary heat exchanger 4 and outputs the detected temperature as an electrical signal. The temperature sensor 32 detects the temperature of the hot water at the branch portion of the pouring pipe line 21 and outputs the detected temperature as an electrical signal. These temperature sensors 28, 30, and 32 are composed of thermistors. The water control valve 34 controls the amount of hot water flowing through the hot water supply path 18. The bypass pipe 38 is formed to increase the responsiveness to the set temperature of hot water, and the bypass flow rate is controlled by the bypass water control valve 40.

  The pouring solenoid valve 42 controls the amount of pouring flowing into the remedy circuit 22 through the pouring pipeline 21, and the pouring amount sensor 44 detects the pouring amount. The check valve 46 is a separating means for separating the water W and the bathtub water 48, and is opened by the water pressure, so that the bathtub water 48 from the remedy circuit 22 flows into the pouring pipe 21 side. Is preventing.

  Further, the remedy circuit 22 is a circulation path for circulating the bath water 48 of the tub 24 to the heat exchanger 8 and reheating it, and includes the remedy heat exchanger 8 described above as a heating means. The reheating heat exchanger 8 performs heat exchange by sensible heat of the combustion exhaust 54 obtained by gas combustion of the burner 52 installed in the retreat combustion chamber 50. In this embodiment, the reheating heat exchanger 8 that performs heat exchange by sensible heat of the combustion exhaust 54 is installed. However, a heat exchanger that performs heat exchange by latent heat may be installed.

  The remedy circuit 22 is connected to the bathtub 24 via a circulation adapter 56. The remedy circuit 22 includes a circulation pump 58, a running water switch 60, a bath water level sensor 62, temperature sensors 64 and 66, and a switching valve 68. Is provided. The circulation pump 58 circulates the bathtub water 48 to the heat exchanger 8 for remedy and the bathtub 24. The flowing water switch 60 detects circulating flowing water and outputs the presence or absence of flowing water as an electric signal. The water level sensor 62 detects the water level of the bathtub water 48 of the bathtub 24 by pressure, and outputs the detected water level as an electrical signal. The temperature sensor 64 detects the temperature of the bathtub water 48 on the outlet side of the bathtub 24, and the temperature sensor 66 detects the temperature of the bathtub water 48 on the inlet side of the bathtub 24, and outputs the detected temperature as an electrical signal.

  A drain discharge path 70 is connected to the switching valve 68, and a drain 72 flows from the drain discharge path 70 into the memory circuit 22. The drain discharge path 70 is connected to a drain receiver 74, and a drain 72 generated by heat exchange of the secondary heat exchanger 6 is stored in the drain receiver 74. The drain discharge passage 70 is provided with a neutralizer 76 for neutralizing the drain 72 and a drain tank 78 for storing the drain 72 after neutralization. The drain tank 78 is provided with a sterilization unit 79 as a sterilization means for sterilizing the drain 72 after neutralization.

  In this embodiment, the remedy circuit 22 and the bathtub 24 are installed in a part of the drain discharge passage 70, and the bathtub 24 is provided with a drainage unit for draining the drain 72 together with the bathtub water 48 or the bathtub water 48. It has been. This drainage part is opened and closed by a drain plug 80.

  Further, the fuel gas G is supplied to the burners 12 and 52 through the gas supply pipe 82, the original gas electromagnetic valve 84 and the gas proportional valve 86 are installed in the gas supply pipe 82, and the switching electromagnetic valve 88, A gas solenoid valve 94 is installed on the side of the burners 52 to switch and adjust the combustion gas G. An air supply fan 96 is installed in the hot water supply combustion chamber 10, and an air supply fan 98 is installed in the combustion combustion chamber 50, and combustion air is supplied individually.

  The control device 100 performs combustion control, hot water supply control, drain discharge control, sterilization control, and the like using the detection signals and setting signals of the various sensors described above as control information. A remote control device 102 for remote control is connected to the control device 100. In addition, the hot water supply or the memorial service by the control device 100 can be performed simultaneously or individually.

  In such a configuration, the burner 12 is ignited by opening the hot water supply port 20 or the pouring electromagnetic valve 42, and the sensible heat or latent heat of the combustion exhaust 14 is used for the primary heat exchanger 4 and the secondary heat exchanger 6. The water W is heated by heat exchange. Then, the heated clean water HW is supplied from the hot water supply port 20, or the hot water solenoid valve 42 is opened, whereby the hot water HW is guided from the hot water supply pipe 21 to the remedy circuit 22 and can be poured into the bathtub 24. It is.

  The drain 72 generated in the secondary heat exchanger 6 by heat exchange is recovered by the drain receiver 74, led to the neutralizer 76 through the drain discharge passage 70, neutralized, and then stored in the drain tank 78. The sterilization unit 79 performs sterilization. The drain 72 of the drain tank 78 is discharged to the bathtub 24 through the remedy circuit 22 by switching the switching valve 68 in accordance with the draining timing of the bathtub water 48, for example.

  Further, when the remedy command is issued, the remedy burner 52 is ignited and when the circulation pump 58 is operated, the bath water 48 circulates in the remedy circuit 22 and passes through the remedy heat exchanger 8. Heated. That is, the bath water 48 of the bathtub 24 is reheated to a predetermined temperature by the circulation of the memory circuit 22. A is the moving direction of the return bathtub water 48 from the heat exchanger 8, and B is the moving direction of the outward bathtub water 48 from the bathtub 24 to the heat exchanger 8. C indicates drainage of the bathtub water 48 when the drain plug 80 is opened.

  Next, the drain tank 78 and the neutralizer 76 will be described with reference to FIG. FIG. 2 is a view showing the form of the neutralizer and the drain tank.

  The neutralizer 76 includes a tank 101 that stores the drain 72 and a lid 103, and a drain discharge path 70 that guides the drain 72 into the neutralizer 76 is connected to the lid 103. The neutralizer 76 is filled with a neutralizing agent 105, and the inside thereof is partitioned by a partition plate 107 that separates the drain introduction side and the discharge side. For example, calcium carbonate is used as the neutralizing agent 105. The partition plate 107 is suspended from the lid 103, and a passage portion 109 for allowing the drain 72 to pass through the neutralizing agent 105 is provided between the lower end portion of the partition plate 107 and the bottom portion of the tank 101. In addition, a discharge port 111 for discharging the neutralized drain 72 is provided in the vicinity of the lid 103. When a certain amount of drain 72 is accumulated in the tank 101, the supernatant liquid is discharged from the tank 101 by natural outflow. It is discharged from the outlet 111 and is led to the drain tank 78 through the drain discharge path 70.

  In the neutralizer 76, the drain 72 is strongly acidic, but is neutralized to a pH (pH) that can be regarded as neutral or neutral. Any neutralization method may be used as long as the pH of the drain 72 is close to neutrality, and other means may be used.

  The drain tank 78 is a container in which the neutralized drain 72 is stored in order to perform discharge and sterilization at an appropriate timing. As described above, the drain tank 78 is provided with the sterilization unit 79. In this embodiment, the photocatalyst sheet 104 and the ultraviolet LED (light emitting diode) 106 are provided as the sterilizing material inside the drain tank 78. ing. The photocatalyst sheet 104 sterilizes the drain 72 by the decomposition function of the photocatalyst, and the ultraviolet LED 106 is supplied with power from the control device 100, and ultraviolet light is supplied to the photocatalyst sheet 104.

  Further, the drain tank 78 is provided with a level sensor 108 as a detecting means for detecting the level of the drain 72, and is provided with a common electrode COM, an electrode H, and an electrode L. That is, the level sensor H110 is configured by the common electrode COM and the electrode H, and the level sensor L112 is configured by the common electrode COM and the electrode L. A high level is detected when the common electrode COM and the electrode H are lost, and a low level is detected when the common electrode COM and the electrode L are lost. That is, the level is detected by the conduction state between the common electrode COM and the electrode H or the electrode L, and drain discharge is controlled. The drain tank 78 is provided with an inlet for the drain 72 at the ceiling and an outlet for discharging at the bottom of the drain tank 78, and an outlet at the time of overflow at the upper side.

  The drain 72 collected in the drain receiver 74 flows into the neutralizer 76 from the ceiling through the drain discharge passage 70 and is neutralized by the neutralizer 105. Then, the drain 72 is stored in the neutralizer 76 and is naturally discharged to the drain tank 78 when reaching the height of the discharge port 111.

  The drain 72 that has flowed into the drain tank 78 is accumulated until a later-described discharge timing, and is sterilized by the decomposition function of the photocatalyst sheet 104 that has been supplied with ultraviolet light from the ultraviolet LED 106.

  Next, the control device 100 and the remote control device 102 will be described with reference to FIG. FIG. 3 is a diagram illustrating an input / output relationship of the control device 100 and a configuration example of the remote control device 102.

  The control device 100 includes a processor such as a microcomputer, an I / O unit, a storage unit 114, a timer 116, and the like. The storage unit 114 stores a processor operation program, set values, various data, and the like. The timer 116 has a plurality of timers, and performs time measurement necessary for various controls such as measurement of the residence time of the drain 72 in the drain tank 78 described later.

  Detection signals from the level sensor L112 and the level sensor H110 installed in the drain tank 78, the bath water level sensor 62 and the running water switch 60 installed in the remedy circuit 22, and other sensors are input to the control device 100. The Then, a control instruction is output from the control device 100 to the circulation pump 58, the switching valve 68, the ultraviolet LED 106, and other functional components.

In addition, an operation input is applied to the control unit 120 of the remote control device 102 from an operation unit 121 including a key switch, and a control output of the control unit 120 is applied to the display unit 122, the alarm device 123, and other devices not shown. ing.

  Next, hot water supply and chasing operation of the hot water and chasing device 2 will be described with reference to FIG. FIG. 4 is a flowchart showing a main routine of hot water supply / memorial operation.

  When the power is turned on, initialization processing such as reading of model settings, output initialization, and initial test is executed (step S1), and detection values of various sensors are taken in (step S2). As a process to be performed constantly, drain discharge management (step S3) described later is executed.

  Determination of each operation of hot water supply / remembrance is performed. First, it is determined whether or not the hot water supply operation is performed when the hot water supply port 20 is opened (step S4), and the execution of the hot water supply operation (YES in step S4). In that case, the process proceeds to hot water supply operation control (step S5). Then, after this hot water supply operation control or when the hot water supply operation is not executed (NO in step S4), it is determined whether or not automatic hot water filling is executed, such as turning on an automatic switch (step S6). When automatic hot water filling is executed (YES in step S6), automatic hot water filling control is executed (step S7).

  After this automatic hot water filling control or when automatic hot water filling is not executed (NO in step S6), it is determined whether or not the hot water is executed by turning on the hot water switch (step S8). In the case of dredging execution (YES in step S8), chasing control (step S9) is executed.

Then, after this chasing control, or when chasing is not executed (NO in step S8), it is determined whether or not the other running is performed by turning on a lukewarm, adding hot water switch or the like (step S10). In the case of execution (YES in step S10), other controls such as adding water and adding hot water are executed (step S11), and the process returns to step S2. If it is not any other execution (NO in step S10), the process returns to step S2. Note that each control does not necessarily shift to the next step until it is finished once started, but performs necessary control while always repeating these processing loops.

  When the water level sensor 62 or the running water switch 60 determines that the water level of the bathtub 24 does not rise within a predetermined time despite the fact that the hot water is being poured, the drain plug 80 of the bathtub 24 is turned on. It is determined that it is missing, that is, it is determined that it is a discharge timing, and drain discharge is managed.

  Next, drain discharge management will be described with reference to FIG. FIG. 5 is a flowchart regarding determination of the drain 72 discharge condition.

  The drain 72 is discharged when the drain 72 stays in the drain tank 78 for a long time, when a condition for starting pipe cleaning of the follow-up circuit 22 described later is satisfied, and when the drain 72 of the drain tank 78 is level. This is the case of sensor H110 or higher. The elapsed measurement time of the drain level state is measured by the timer 116 of the control device 100 while the level sensor L112 is continuously turned on, but is reset when the level sensor L112 falls below the level sensor L112.

  First, in order to prevent the drain 72 from overflowing, whether or not the drain 72 that has not been sterilized in the drain tank 78 has passed, for example, three months or more as the predetermined time TM in the state of the level sensor L112 or higher. Is determined (step S101). If it is determined that the predetermined time TM has elapsed (YES in step S101), the drain discharge process is performed regardless of whether or not the bathtub water 48 is drained (step S102). In this case, the drain 72 is discharged into the bath water 48, but there is no problem because neutralization and sterilization are performed.

  For example, when the drain 72 has not passed three months as the predetermined time TM (NO in step S101), the drain 72 is not sterilized in the drain tank 78 and is in a state equal to or higher than the level sensor L112. For example, it is determined whether or not 72 hours or more have elapsed as the predetermined time Tt (step S103). For example, when it is determined that the drain 72 has passed 72 hours as the predetermined time Tt (YES in step S103), the ultraviolet LED 106 in the drain tank 78 is turned on to start the drain sterilization process ( Step S104). Then, for example, a determination is made as to whether or not 5 minutes have passed as a predetermined time necessary for sterilization (step S105). If the time has elapsed, the ultraviolet LED 106 is turned off (step S106), and the timer 116 of the control device 100 is reset. In this case, the drain 72 is not discharged.

  Further, when it is determined that the drain 72 has not passed the predetermined time Tt (NO in step S103), it is determined whether or not the memory circuit 22 satisfies a pipe cleaning start condition described later. (Step S107).

  The pipe cleaning start condition is determined by determining that the drain plug 80 of the bathtub 24 has been removed. First, a change in the water level due to a decrease in the bathtub water 48 is detected by the water level sensor 62. Next, when the water level reaches a predetermined determination criterion due to the decrease in the bathtub water 48, a predetermined time Ts from the time when the reference level is reached. For example, measurement is performed for 3 minutes. After a predetermined time Ts has elapsed, the circulating pump 58 is driven, and the water level of the bathtub water 48 is provided in the circulation port of the bathtub 24 according to the state of the flowing water detected by the flowing water switch 60 provided in the tracking circuit 22. A determination is made as to whether or not the adapter 56 has fallen below. As a result of the determination, if it is determined that the water level of the bathtub water 48 is below the circulation adapter 56, it is determined that the drain plug 80 of the bathtub 24 has been removed. In addition, by attaching a sensor or the like to the drain plug 80 or the like of the bathtub 24, it is also possible to detect the state in which the drain plug 80 or the like has been directly pulled out. May be linked to the opening of the solenoid valve.

  When the pipe cleaning start condition is satisfied (YES in step S107), after the drain 72 is discharged (step S108), the pipe is cleaned (step S109). Note that whether or not the pipe cleaning is performed is arbitrary, and is not a condition whether or not the drain 72 is discharged. When the pipe cleaning start condition is not satisfied (NO in step S107), it is determined whether or not the drain 72 in the drain tank 78 is equal to or higher than the level sensor H110 (step S110). As a result of the determination, when the level of the drain 72 is equal to or higher than the level sensor H110 (YES in Step S110), in order to prevent the drain 72 from overflowing, regardless of whether or not the bathtub 24 is in a drained state, A drain discharge process is performed (step S111). In this case as well, since the neutralization process and the sterilization process are performed on the drain 72 as described above, there is no problem even if it is mixed in the bath water 48.

  Next, the drain discharge process will be described with reference to FIG. FIG. 6 is a flowchart showing details of the steps (S102, S108, S111) of the drain discharge process of FIG.

  First, it is determined whether or not the level of the drain 72 in the drain tank 78 has reached the level sensor L112 (step S201). If the level has not reached the level sensor L112, the drain is not discharged (step S201). NO of S201). If it has reached (YES in step S201), the ultraviolet LED 106 is turned on to start sterilization in the drain tank 78 (step S202), and after a predetermined time (for example, 5 minutes) has elapsed (step S203), the ultraviolet ray The LED 106 is turned off to end the sterilization process (step S204).

  When the drain cleaning process is performed while satisfying the pipe cleaning conditions (step S108 in FIG. 5), the bathtub water 48 is below the reference water level in the determination of the pipe cleaning conditions (step S107 in FIG. 5). After detecting that the predetermined time Ts has been detected, the drain LED sterilization process may be performed by turning on the ultraviolet LED 106 of the drain tank 78 in accordance with the start of the time measurement.

After completion of the sterilization process, the switching valve 68 provided in the tracking circuit 22 is switched to allow the drain 72 to flow into the tracking circuit 22 (step S205), and the circulation pump 58 is driven to drain. 72 is discharged (step S206). While the drain 72 is being discharged, the level of the drain 72 is monitored by the level sensor L112 in the drain tank 78 (step S207). When the drain sensor 72 falls below the level sensor L112, the circulation pump 58 is stopped (step S208). Switching is made so that the drain 72 cannot flow into the tracking circuit 22 (step S209), and the drain discharging process is terminated.

[Second Embodiment]

  A second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a view showing a hot water supply / remembrance device according to the second embodiment. In FIG. 7, the same parts as those in FIG.

  In the second embodiment, the drain discharge path 70 is configured separately from the tracking circuit 22, and the opening / closing valve 128 provided in the drain discharge path 70 is controlled by the control device 100.

  In such a configuration, the on-off valve 128 is used when the level sensor H110 detects the high level H as the discharge level without matching the drainage timing of the bathtub 24 or the pipe cleaning timing of the remedy circuit 22. Open and close. Further, for example, after 72 hours or 3 months have passed since the discharge, the on-off valve 128 may be opened in the same manner.

In this way, inconveniences such as bacterial growth on neutralized and sterilized drain 72 can be avoided, and there is no need to drain drain 72 through remedy circuit 22 or bath 24.

[Other Embodiments]

  (1) Although the photocatalyst sheet 104 is used in the above embodiment, a photocatalyst ball 130 may be used as shown in FIG. Even in such a configuration, the drain 72 stored in the drain tank 78 can be sterilized, and there is no inconvenience such as decay of the drain 72, and it is possible to discard them together.

  (2) In the above embodiment, the ultraviolet LED 106 is used as the ultraviolet ray supply source for the sterilization treatment with the photocatalyst. However, as shown in FIG. 9, the drain tank 78 is provided with a light window 132 for guiding ultraviolet rays from the outside. In addition, a light window or the like that transmits ultraviolet rays may be provided in the case of the heat source device to supply ultraviolet rays from outside the heat source device. Also with such a configuration, the drain 72 stored in the drain tank 78 can be sterilized, and the ultraviolet LED 106 and its control become unnecessary.

  (3) In the above embodiment, the drain 72 is discharged through the remedy circuit 22, but when the remedy circuit 22 is configured as a drain discharge path, a part of the remedy circuit 22 may be used.

  (4) In the above embodiment, sterilization is performed using a photocatalyst, but other members such as a copper mesh may be used for the sterilization unit 79 in addition to a general disinfectant, Natural minerals may be used.

As mentioned above, although the most preferable embodiment of this invention was described, this invention is not limited to the structure of said embodiment.

ADVANTAGE OF THE INVENTION According to this invention, while performing the neutralization process and sterilization process to a drain, while aiming at the drain discharge process easy, simplification of the piping structure of a heat source apparatus is realizable.

It is a figure showing the hot-water supply / remedy apparatus which concerns on 1st Embodiment. It is a figure showing the structural example of a neutralizer and a drain tank. It is a block diagram which shows the control apparatus of a hot water supply / remedy apparatus. It is a flowchart which shows the main routine of hot water supply and memorial operation. It is a flowchart regarding judgment of drain discharge conditions. It is a flowchart which shows a drain discharge process. It is a figure showing the hot-water supply / remedy apparatus which concerns on 2nd Embodiment. It is a figure showing the structural example of another neutralizer and a drain tank. It is a figure showing the structural example of another neutralizer and a drain tank.

Explanation of symbols

2 Hot water supply / remembrance device 4 Primary heat exchanger 6 Secondary heat exchanger 22 Remembrance circuit 70 Drain discharge path 72 Drain 76 Neutralizer 78 Drain tank 79 Sterilization unit 100 Controller 104 Photocatalyst sheet 106 UV LED
108 Level sensor 110 Level sensor H
112 Level sensor L

Claims (13)

A drain processing apparatus for processing drain generated by heat exchange,
Neutralizing means for neutralizing the drain;
A drain tank for storing the drain neutralized by the neutralizing means;
Sterilization means for starting sterilization of the drain in the drain tank after the level of the drain stored in the drain tank reaches a reference level, and sterilizing the drain for a predetermined time or more ;
A drain processing apparatus comprising: The drain processing apparatus according to claim 1,
Detecting means for detecting the drain level of the drain tank;
A discharge path connected to the drain tank for discharging the drain from the drain tank;
Control means for controlling drain discharge of the discharge path based on the detection level of the detection means;
A drain processing apparatus comprising: The drain processing apparatus according to claim 2, wherein
The discharge path is constituted by a part or all of a memorial circuit of a heat source device that heats bathtub water,
The said control means performs discharge | emission control of the said drain according to discharge | emission of the said bath water, The drain processing apparatus characterized by the above-mentioned. The drain processing apparatus according to claim 3.
The drain processing apparatus, wherein the control means is configured to discharge the drain of the drain tank from the discharge passage when the bathtub is below a predetermined water level. The drain processing apparatus according to claim 1 or 2,
A drain treatment apparatus using a photocatalyst as the sterilization means. The drain processing apparatus according to claim 1,
A drain treatment apparatus comprising a light source that emits ultraviolet light in the sterilization means. A heat source device that includes a heat exchanger that recovers latent heat from combustion exhaust, and heats the water by heating, heats the bath water, or heats the heating medium.
Neutralizing means for neutralizing the drain generated by the heat exchange;
A drain tank for storing the drain neutralized by the neutralizing means;
Sterilization means for starting sterilization of the drain in the drain tank after the level of the drain stored in the drain tank reaches a reference level, and sterilizing the drain for a predetermined time or more ;
A heat source device comprising: The heat source device according to claim 7,
A discharge path for discharging the drain from the drain tank;
Detecting means for detecting the level of the drain in the drain tank;
Control means for controlling the discharge of the drain from the discharge path based on the detection level of the detection means;
A heat source device comprising: The heat source device according to claim 8, wherein
The discharge path is constituted by a part or all of a memory circuit that circulates the bathtub water to the heat exchanger,
The control means is configured to discharge the drain of the drain tank in accordance with the discharge of the bath water. A drain treatment method for treating drain generated by heat exchange,
A treatment for neutralizing the drain;
A process of storing the drain in a drain tank;
Starting the sterilization of the drain in the drain tank after the level of the drain stored in the drain tank reaches a reference level, and sterilizing the drain for a predetermined time or more ;
A drain treatment method comprising: The drain processing method according to claim 10, wherein
A process for detecting a drain level in the drain tank;
A process of discharging the drain from the drain tank based on the drain level;
A drain treatment method comprising: The drain processing method according to claim 10, wherein
The drain processing method characterized by including the process which discharges the drain of the drain tank according to discharge of the bathtub water through a part or all of the memory circuit which circulates the bathtub water heated by the heat exchange . The drain processing method according to claim 12, wherein
The drain is discharged to the bathtub when the water level of the bathtub water is equal to or lower than a predetermined water level.

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