JP6563310B2 - Heat source device, drain discharge processing method, and drain discharge processing program - Google Patents

Description

  The present invention relates to a technology for discharging drainage generated by latent heat recovery of a heat source device.

  For example, in a heat source device such as a water heater, when heat exchange for recovering latent heat is performed on combustion exhaust, drainage such as condensation is generated on the peripheral surface of the heat exchanger. Therefore, the drain is recovered and discharged outside the device. It will be necessary. For the drainage, for example, a part of a pipe line installed in the heat source device is passed through, and is discharged to a general sewage pipe directly or via a bathtub or a drain pan.

  Since the drain generated by heat exchange is, for example, strongly acidic, the neutralization treatment is performed at the time of discharge in consideration of the influence on the environment due to the discharge. In addition, the drain may contain formaldehyde or the like as a methane-based combustion product due to, for example, components contained in the fuel gas that burns the burner. It is not preferable to flow such a substance as it is into the drain flowing in the bathtub, a part of the pipeline, or the sewage pipe side. Therefore, there is known one that performs a process of modifying or decomposing a substance contained in such a drain.

  With regard to such drain treatment, the drain water collected from the secondary heat exchanger is decomposed by the catalyst in the reforming tank to remove formaldehyde, and then temporarily stored in the buffer tank through the neutralization tank, so that the bathtub is not used. There is one that discharges drain to the bathtub side at the timing of use (for example, Patent Document 1). In addition, there is a method in which treated water is introduced into a treatment tank through a pipe line provided with an opening / closing body, and the catalyst fine particles and the treated water in the treatment tank are circulated to perform a process for proceeding an oxidative decomposition reaction of formaldehyde. There is (for example, Patent Document 2).

JP 2009-222367 A JP 2010-029812 A

  By the way, in the drain treatment using an adsorbent or a catalyst, a certain time is required until the adsorption or decomposition reaction of the specific substance is sufficiently performed and the influence on the environment is small. If the material is discharged through a bathtub, a discharge pipe, a memorial pipe, etc. without sufficient treatment, a specific substance may be mixed into the bathtub. Therefore, in the drain treatment, there is a problem that it is necessary to take a sufficient time for adsorption or decomposition, and to avoid contamination of the drain during the treatment.

  In order to complete the drain treatment, if the treatment tank for performing the drain treatment is closed and untreated drain is not mixed during the treatment, the drain may overflow in the drain pipeline. In order to suppress the generation of drain, it is necessary to perform a process such as prohibiting latent heat recovery in the secondary heat exchanger. Also, if drainage is prohibited while using hot water supply or reheating function, if the drain after the adsorption or decomposition process is not discharged, new drain cannot be put into the treatment tank. Drain generation due to overflow prevention is suppressed. When such drain generation suppression is performed, there is a problem that the efficiency of exhaust heat recovery in the heat source device is reduced.

  Patent Document 1 and Patent Document 2 do not disclose or suggest such problems or means for solving them.

Therefore, in view of the above problems, an object of the present invention is to provide a heat source device that can sufficiently perform treatments such as adsorption and decomposition of substances contained in the drain, and further maintain combustion efficiency.

In order to achieve the above object, according to one aspect of the heat source apparatus of the present invention, a heat source apparatus comprising a heat exchanger that generates drainage by heat exchange mainly recovering latent heat in combustion exhaust, a neutralizer for neutralizing crowded preparative drain occurring in exchanger, said neutralizer in neutralized drainage flows, processing means for drainage process of reducing the specific substance from the drain by the treatment agent When, for the processing unit, an inflow control means for restricting the flow of the drain neutralized by the neutralizer, via said inflow control means connected to said processing means, to said processing means by said inflow control means sometimes inflow drain neutralized by the neutralizer is limited, a storage means for reserving the drain neutralized by the neutralizer occurring in the heat exchanger, which is processed by the processing means de Let ren flow outside the heat source device Means out, the inflow control means closes to initiate the drainage processing, and the After draining from the processing means through said discharge means in response to the setting time has elapsed, then the admission control means in the open state, the storing means to the reservoir was drained and the drain, which is accumulated in the storing means and said neutralizer may Sonaere a control unit Ru is introduced into the processing unit.

  In the heat source apparatus, preferably, the processing means includes a water level detection means for detecting a water level of the drain stored therein, and the control unit determines whether the water level inside the processing means is a threshold value based on a detection result of the water level detection means. When it becomes above, you may perform a drain process.

  In the heat source device, preferably, the control unit may start the drain process by closing the inflow control unit based on a set process start time.

In the heat source apparatus, preferably, the processing means is provided with a flow means for causing flow of the drain within the control unit, the execution timing of the drain process may be operated with the flow means.

  In the heat source apparatus, preferably, the processing means may include a catalyst material that changes a specific substance contained in the drain or an adsorbent that adsorbs the specific substance contained in the drain.

  In the above heat source device, preferably, the discharge means is installed in a memorial pipeline for flowing the bath water in the bathtub and chasing it, and a part of the memorial pipeline, and when the drain is discharged, the memorial pipeline And a switching valve that guides the drained fluid to the discharge side.

  Preferably, the heat source device further includes combustion monitoring means for monitoring a combustion state of the combustion means of the heat source device, and the control section performs the inflow control when the combustion processing of the combustion means is not executed for a predetermined time or more. The draining process may be started by keeping the means open.

  In the heat source device, preferably, the control unit may stop the drain process when there is an operation request to the combustion unit before the drain process is completed.

  In the above heat source device, preferably, the storage means may be formed in a part of the neutralizer.

In order to achieve the above object, according to one aspect of the drain discharge processing method of the present invention, a drain discharge process of a heat source device including a heat exchanger that generates drain by heat exchange mainly recovering latent heat in combustion exhaust. In this method, the drain generated in the heat exchanger is taken in and neutralized in the neutralizer, and the drain that has been neutralized in the neutralizer flows into the drain by the processing agent. performs drain process to reduce the specific substance, by admission control means to restrict the flow of the drain neutralized by the neutralizer to said processing means, which is neutralized by the neutralizer to the inflow control means When the inflow of drain is restricted, the drain generated in the heat exchanger and neutralized in the neutralizer is stored in a storage unit connected to the processing unit via the inflow control unit, and the processing heat de Len treated with means Outside sink device, the inflow control means to start closing to drain processing, the After draining from the processing means through the discharge detecting means in response to the setting time has elapsed, then the admission control means in the open state Te may be included a process of said storing means to the reservoir was drained or drain which is accumulated in said storage means and said neutralizer, Ru allowed to flow into the processing unit.

  In the drain discharge processing method, preferably, when the water level of the drain stored in the processing means is detected by a water level detection means, and the water level in the processing means becomes equal to or greater than a threshold from the detection result of the water level detection means. A process for executing the drain process may be included.

  Preferably, the drain discharge processing method may include a process of starting the drain process by closing the inflow control unit based on a set process start time.

In order to achieve the above object, according to one aspect of the drain discharge processing program of the present invention, there is provided a drain discharge processing program for causing a computer that controls a heat source device that generates drain by heat exchange to execute the heat exchange. a function for taking the generated drain into neutralizer, closes the inflow control means, the processing means for executing a drain process to reduce the specific substances contained in the drain by treatment agent in the neutralizer A function of restricting the inflow of neutralized drain; and when the inflow of the drain neutralized by the neutralizer to the processing means is restricted by the inflow control means, the neutralized drain, a function of accumulating the storage means connected to said processing means via said inflow control means, to start drain process according to closing of the inlet control means, the set time To After draining from the processing means through the discharge means in response to excessive, accumulate the inflow control means by the open state, said storing means to the reservoir was drained, or said reservoir means and said neutralizer the drain which is it is sufficient to perform the function of Ru allowed to flow into the processing unit to the computer.

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

  (1) The processing time for the drain can be secured, and the drain can be discharged without leaving any specific substance.

  (2) The newly generated drain can be prevented from being mixed into the drain being processed, and the untreated or insufficiently treated drain is not discharged, so that the reliability of the heat source device can be improved.

(3) Even when draining is performed, it is possible to prevent the heat recovery efficiency of the heat source device from decreasing.

It is a figure which shows the structural example of the drain discharge system which concerns on one embodiment. It is a flowchart which shows an example of operation control of a heat-source apparatus. It is a figure which shows the structural example of a hot water supply / remedy apparatus. It is a figure which shows an example of a drain tank. It is a figure which shows the structural example of a neutralizer, and the structural example of a drain process function part. It is a figure which shows an example of the control part of a heat-source apparatus. It is a flowchart which shows an example of drain discharge management. It is a figure which shows another example of a drain process part.

<Drain discharge system>

  FIG. 1 shows an example of a drain discharge system. The configuration shown in FIG. 1 is an example, and the present invention is not limited to such a configuration.

  For example, as shown in FIG. 1, the drain discharge system 2 includes a heat source device 4 having a hot water supply function, a bath water BW replenishment function in the bathtub 6, and the like, and is an example of the heat source device of the present disclosure. The drain discharge system 2 performs a drain process such as neutralization, removal or decomposition of a specific substance on the drain generated by the heat exchange between the combustion exhaust gas and the purified water, and performs a discharge process to a predetermined drainage side. In the drain discharge system 2, the drain that has been drained is discharged to a drain outlet other than the bathtub 6.

  The heat source device 4 is an example of the heat source device of the present disclosure, and includes a heat exchanger 8 that performs heat exchange for hot water supply therein, and a heat exchanger 48 for remedy that takes in and bathes in the bath water BW. (FIG. 3). The heat exchanger 8 includes a primary heat exchanger that mainly recovers sensible heat from the combustion exhaust gas, and a secondary heat exchanger that mainly recovers latent heat. In the heat source device 4, in particular, in the latent heat recovery in the secondary heat exchanger among these heat exchangers 8, the water vapor contained in the combustion exhaust gas and the surrounding air is condensed to generate drainage that is unnecessary water. . The generated drain is, for example, strongly acidic and contains a substance such as formaldehyde as a methane component contained in the fuel gas. Formaldehyde is subject to the tap water quality standard item specified by the Ministry of Health, Labor and Welfare. In this drain discharge system 2, a part of the pipe line in the heat source device is used for the drain discharge path, and specific substances such as formaldehyde contained in the drain are reduced in order to suppress the influence on the environmental load. , To clean the equipment.

  The heat source device 4 includes a drain receiver 10 that collects drain D along the bottom side of the heat exchanger 8, for example, and the collected drain D is discharged to the discharge side through a drain pipe 12 that is a part of drain discharge means. Led. The drain line 12 includes a neutralizer 14, a storage tank 16, a drain inflow valve 18, and a drain tank 20 that are disposed inside the heat source device 4. Further, the drain tank 20 includes a discharge pipe 22 for discharging the treated drain to the outside of the heat source device 4. Such a discharge pipe line 22 is an example of the discharge means of the present disclosure, and uses a part of the remnant pipe line 24 for additionally heating the bathtub water BW in the bathtub 6. The discharge pipe 22 includes, for example, a part of a tank side flow path 22-1 that flows from the drain tank 20 to the side of the memorial pipe line 24, a memorial return pipe line 24-1, and a part of the memorizing forward pipe line 24-2. The discharge side flow path 22-2 is included. At the connecting portion between the tank side flow path 22-1 and the follow-up pipeline 24, the three-way valve 26 for switching the flow of the bath water BW and the flow of the treated drain D and the bathtub 6 of the follow-up feed pipeline 24-2. A three-way valve unit 28 that branches off the front side of the circulation adapter installed in the pipe and flows the drain D to the drainage part 30 side is provided.

  The neutralizer 14 is an example of a means for neutralizing the recovered drain D. For example, calcium carbonate or the like is filled therein as a neutralizing agent, and the neutralizing agent is immersed in the drain D that has flowed, Neutralize the pH of drain D to neutral or close to it. The neutralizer 14 is not limited to the case of using the filled neutralizer. Any means for neutralizing the drain D may be used, and for example, a technique such as adding a strong alkaline agent may be used.

  The storage tank 16 is an example of a storage unit that stores drain that is restricted from flowing into the drain tank 20. The storage tank 16 functions as a so-called buffer tank that stores newly generated unprocessed drain D so as not to flow into the drain tank 20 in which drain processing is started. The storage tank 16 has a capacity set based on, for example, a hot water supply capacity of the heat source device 4 and a value obtained by experimentally measuring a drain generation amount due to heat exchange of the heat exchanger 8 or a drain processing time in the drain tank 20. That's fine.

  The drain inflow valve 18 is an example of the inflow control means of the present disclosure, and controls the inflow of unprocessed drain D into the drain tank 20 by opening and closing the drain pipe line 12. The drain inflow valve 18 may use an on-off valve that can block the flow path of the drain pipe line 12. The drain inlet valve 18 is controlled to be opened and closed by the control unit 32 of the heat source device 4, and the opening and closing control is performed in conjunction with the execution of the drain processing of the drain tank 20.

  The drain tank 20 is an example of the processing means of the present disclosure. For example, a specific substance such as formaldehyde contained in the drain D is obtained by allowing the drain D to flow into the tank filled with the processing agent and immersing the drain D for a predetermined time. Is decomposed or adsorbed on a treating agent. Thereby, such a substance is reduced from the drain D discharged | emitted out of an apparatus. What is necessary is just to use the kind and processing method of the processing agent with which the drain tank 20 is filled according to the specific substance to process, such as decomposition | disassembly and adsorption | suction.

  In the drain treatment for reducing formaldehyde from the drain D, for example, barley stone 118 (FIG. 4) may be used as a treating agent. The barley stone 118 is an example of a catalyst that changes formaldehyde into a polysaccharide substance. The drain D that has flowed into the drain tank 20 is changed into a tricarbon sugar by contact with the barley stone 118, and then changes into a substance such as a tetracarbon sugar and a pentose tank.

  The processing means and processing agent for the drain D are not limited to this. In order to change the substance of the drain D, an adsorbent that adsorbs a specific substance such as formaldehyde from the drain may be used.

  The control unit 32 is an example of a function control unit of the heat source device 4. In addition to burner combustion control, hot water supply, bath water BW tracking control (not shown), drain control execution control for the drain inlet valve 18 and the drain tank 20. As the drain D after the processing, the drain inflow valve 18, the three-way valve 26, and the three-way valve unit 28 are controlled to be switched.

  <Operation control of heat source device>

  FIG. 2 is a flowchart illustrating an example of operation control of the heat source device. The processing contents and processing procedures shown in this flowchart are examples, and the present invention is not limited to such contents. The operation control of the heat source device is an example of the drain discharge processing method and the drain discharge processing program of the present disclosure, and includes hot water supply operation control and bathtub management operation control in addition to drain discharge management.

  When the power source of the heat source device 4 is turned on, the control unit 32 executes initialization processing including, for example, reading model setting information and initializing output values for each function unit (S1). When the initialization process is completed, the heat source device 4 shifts to a standby state for a hot water supply request or a memorial request based on a user operation instruction. In addition to these operation requests, the heat source device 4 generates drain D generated by heat exchange, monitors the water level of the drain D accumulated in the drain tank 20, and reduces the formaldehyde and drains as drain processing. The drain discharge management is performed (S2).

  Moreover, the control part 32 judges whether it is execution of the hot water supply operation | movement of the heat-source apparatus 4 (S3). In this execution determination of the hot water supply operation, for example, a hot water supply request may be determined based on whether a hot water tap or the like has been opened. Control part 32 shifts to hot water supply operation control, when execution of hot water supply operation is demanded (YES of S3) (S4). The hot water supply operation control includes burner combustion control, hot water temperature adjustment control, and the like based on, for example, the set temperature and the degree of opening of the plug.

  When the execution of the hot water supply operation is not requested (NO in S3), the control unit 32 determines whether or not the bathtub management operation control is executed (S5). Bathtub management operation control includes, for example, automatic hot water filling control such as turning on an automatic operation switch, bathing control, etc. for bathtub water BW. In addition, the control unit 32 executes control such as freeze prevention processing and abnormality monitoring processing as other control (S7).

  After the drain process in the drain tank 20, the control unit 32 uses the result of the bathtub management execution determination (S5) in the discharge process to the outside of the apparatus, and the memorial pipe line 24 is used in the determination result. If not, the discharge process may be performed. Moreover, the control part 32 may utilize the result of hot water supply operation execution determination (S3) as one of the determinations of the drain process execution condition.

  Note that the operation control of the heat source device 4 may be performed independently, and the drain discharge management, the hot water supply operation control, the bathtub management control, and the like may be constantly monitored in a loop. The control device 32 may perform interrupt control for each operation request.

  <Configuration of hot water supply / remembrance device>

  FIG. 3 shows a configuration example of a hot water supply / remembrance device. The hot water supply / remembrance device 40 is an example of the heat source device 4 according to the present disclosure. For example, the hot water supply function for supplying the heated water to the predetermined temperature by exchanging the taken-up water or supplying the bathtub water BW for heat exchange. And has a memorial function for heating.

  The hot water supply / remembrance device 40 includes, for example, a combustion chamber 42 in a casing, and a primary heat exchanger 44 and a secondary heat exchanger 46 for hot water supply in the combustion chamber 42 and a heat exchanger for amendment. 48. The secondary heat exchanger 46 for hot water supply is an example of the heat exchanger of the present disclosure, and the drain D is generated. The hot water supply heat exchanger and the memorial heat exchanger are independent of each other, and both can be operated simultaneously or independently. Moreover, in the hot water supply / remembrance device 40, as an example in which the function of one heat exchanger can be used for the other application, hot water heated by the heat exchanger on the hot water supply side is poured into the bathtub 6 side and filled. It is possible.

  Further, a hot water supply burner 50 and a reheating burner 52 are installed in the combustion chamber 42, and fuel gas G is supplied to each burner through a fuel gas pipe. The fuel gas pipe is provided with, for example, an original gas solenoid valve, a gas proportional valve, a switching solenoid valve, a gas solenoid valve, etc., and a gas supply amount to realize a combustion amount according to a hot water supply request or a renewal request. Is adjusted. In addition, each burner is provided with a fan for supplying combustion air.

  The burner 50 is provided with a frame rod 51 as combustion monitoring means, for example.

  In the hot water supply / remembrance device 40 shown in FIG. 3, the hot water supply burner 50 and the renewal burner 52 are shown installed in the common combustion chamber 42, but the present invention is not limited to this. Each burner may be provided with a hot water combustion chamber or a combustion combustion chamber. The hot water supply heat exchanger and the additional heat exchanger may be disposed in the hot water supply combustion chamber or the additional combustion chamber.

  <Configuration on the hot water supply side>

  The hot water supply / remedy device 40 includes a water supply pipe 60 that guides the clean water W, a hot water supply pipe 62 that flows hot water after heat exchange and discharges it, and a part of the water supply pipe 60 that branches off the hot water after heat exchange. Further, a bypass pipe 64 that mixes the clean water W and a hot water supply pipe 66 that branches from the hot water supply pipe 62 and that pours water to the side of the memorial pipe 24 are provided. For example, a water amount sensor 68 is installed in the water supply pipe 60 to detect the presence or absence of the inflow of clean water W and its flow rate. The clean water W flows through the water amount sensor 68 to the secondary heat exchanger 46 side to exchange heat, and then exchanges heat in the primary heat exchanger 44 and reaches the hot water supply side. The bypass pipe 64 includes a bypass water control valve 70 that mixes a part of the clean water W with the heat-exchanged hot water in order to enhance the responsiveness of the hot water to the set temperature of the hot water. In addition, the hot water supply / remedy device 40 is provided with an overpressure relief valve on the side of the water supply pipe 60 and an inlet water temperature thermistor for detecting the incoming water temperature, and a hot water temperature thermistor, a mixed temperature thermistor, and a water control valve on the outlet water pipe 62 side. 72 etc. are installed.

  The pouring line 66 is branched, for example, in front of the hot water supply port, and the hot water HW obtained on the hot water supply line side flows through the memorial line 24. The pouring pipe 66 includes, for example, a pouring electromagnetic valve, a pouring sensor for monitoring the pouring amount, a check valve, and the like. The hot water HW that has flowed into the pouring pipe 66 is supplied into the bathtub 6 through the memorial pipe 24.

  <Commemorative configuration>

  The memorial pipe line 24 is disposed, for example, between the heat exchanger 48 for memorial service and a circulation adapter installed at the connecting portion of the bathtub 6. In addition to the pump 94 for circulating the bath water BW, for example, a bath water flow switch for detecting the water flow of the bath water BW, a bathing thermistor for detecting the temperature of the bath water BW, a bathing thermistor, etc. It has. Further, as described above, the memorial pipe line 24 includes the three-way valve unit 28 on a part of the memorial forward pipe line 24-2 side, and also drains the drain D through the three-way valve 26. 90. With such a configuration, when the three-way valve 26 is switched, the treated drain D in the drain tank 90 is discharged from the three-way valve unit 28 to the drainage portion 30 side through the remedy conduit 24 by driving the pump 94.

  <Configuration of drain discharge means>

  The drain D generated in the secondary heat exchanger 46 is collected by the drain receiver 10 and stored in the neutralizer 80 installed in the drain pipeline 12. The neutralizer 80 forms a storage space 82 in a part of the upper side thereof, for example. The drain D neutralized by the neutralizer 12 is supplied to the drain tank 90 through the drain inflow valve 84. The drain tank 90 drains the stored drain D, and then is discharged from the drain pipe 92 through the follow-up pipe 24 at a predetermined timing.

  In addition, the hot water supply / remedy device 40 includes an electrical board 100 that controls the operation of each functional unit, a bathroom remote control 102 that inputs operation instructions from the user, displays the operating state of the hot water supply / remedy device, and the like, a kitchen remote control 104 and the like.

  <Drain tank configuration>

  FIG. 4 shows an example of the drain tank. The configuration shown in FIG. 4 is an example, and the drain tank is not limited to such a configuration.

  The drain tank 90 includes a drain inlet 112 through which the drain D neutralized by the neutralizer 80 flows, for example, on the upper side of the tank main body 110. For example, the tank main body 110 includes a partition wall 114 that partitions the inside, and the first space 116 on one side partitioned by the partition wall 114 is filled with barley stone 118 that is a processing agent. . The drain inlet 112 is disposed, for example, on the first space 116 side, and the drain D that has been taken in may be directly introduced into contact with the barley stone 118. Further, a treated water discharge port 128 for discharging the treated drain is provided at the bottom of the drain tank 90, for example, on the first space 116 side.

  Further, the drain tank 90 is formed with a staying portion 120 in which a part on the bottom side of the tank main body 110 is protruded. This staying part 120 is formed on the first space part 116 side, and filled with barley stone 118. As a result, a part of the drain D that has flowed into the drain tank 90 accumulates in the retention portion 120, and when the retention portion 120 is filled with the drain D, the water level in the first space portion 116 rises. Since the treated water discharge port 128 is formed at a portion other than the staying portion 120, it is formed at a position higher than the staying portion 120. Thus, even when the drain D discharging process is completed, a certain amount of the processed drain D remains in the staying part 120. By leaving the treated drain D in this way, the formaldehyde contained in the newly treated untreated drain D has a significant reaction from sugar changed to tricarbon sugar to tetracarbon sugar and pentose sugar. A catalytic effect (formose reaction) that promotes the promotion can be expected.

  In addition, a connector part 122 that allows drain D to flow, for example, is formed at the bottom of the retention part 120, and a circulation pipe 124 and a circulation pump 126 that cause the drain D to flow to the upper side of the tank body 110 are formed in the connector part 122. Installed. The circulation pipe 124 and the circulation pump 126 are an example of the swinging means of the present disclosure, and the reaction of specific substances such as formaldehyde is promoted by circulating the drain D and swinging with respect to the barley stone 118 serving as a catalyst. The effect can be expected.

  Further, the tank body 110 is provided with a water level sensor 132 for detecting the water level of the drain D in the second space 130 partitioned by the partition wall 114. The partition wall 114 may be formed in a network structure that allows the drain D, which is a fluid, to pass therethrough but does not allow the barley stone 118, which is a solid, to pass through. The water level sensor 132 includes, for example, a water level electrode 134, a common electrode (COM) 136, a water level sensor H138 that detects the water level near the overflow, and a water level sensor L140 that detects the presence or absence of the drain D in the drain tank 90.

  <Configuration of inflow path to neutralizer and drain tank>

  For example, as shown in FIG. 5, the neutralizer 80 is formed with a drain inlet 150 through which the drain D flows through the drain pipe 12 on the upper side of the tank main body 110. The tank is filled with, for example, a neutralizing agent 152, and a partition plate 154 is installed from the ceiling toward the bottom until reaching the inside of the accumulated neutralizing agent 152. Thereby, a space portion 156 filled with the neutralizing agent 152 is formed between the front end side of the partition plate 154 and the bottom of the tank. The drain D stored in the neutralizer 80 flows through the space 156 from one region partitioned by the partition plate 154 toward the other region, for example.

  The neutralizer 80 is formed with a discharge port 158 that discharges the drain D that has been neutralized at a position higher than the center, for example, and a drain line 159 is connected to the discharge port 158. Is done. The drain D in the neutralizer 80 is discharged from the discharge port 158 to the drain line 159 side due to the rise in water level. The discharge port 158 is formed on the side of the region different from the region where the drain inlet 150 is disposed, for example, inside the neutralizer partitioned by the partition plate 154.

  The drain pipe 159 is a pipe through which the drain D neutralized toward the drain tank 90 flows, and a drain inflow valve 84 capable of blocking the flow path is installed in the middle of the pipe. The drain inflow valve 84 is closed, for example, when drain processing is started in the drain tank 90.

  In the neutralizer 80, for example, a storage space 82 is formed at a position higher than the discharge port 158 on the ceiling side. The storage space 82 is an example of a storage tank according to the present disclosure, and is a means for storing the drain D when the drain inflow valve 84 installed in the drain pipe line 159 is closed. As a result, the hot water supply / remedy device 40 can store a certain amount of drain D even when the drain inflow valve 84 is closed, for example, when drain processing is started on the drain tank 90 side, and the secondary heat exchanger The hot water supply using 46 can be performed.

  <Regarding the configuration of the control unit>

  FIG. 6 shows an example of the control unit of the heat source device. The configuration shown in FIG. 6 is an example, and the present invention is not limited to this. The control unit 32 includes the electrical board 100 of the hot water supply / remembrance device 40.

  The control unit 32 includes a microcomputer, and includes a processor 160, a memory 162, a timer 164, a system communication unit 166, an I / O (Input / Output) 168, and the like. Further, the control unit 32, for example, through the I / O 168, the frame rod 51, the water level sensor 132, the memory circulation pump 94, the circulation pump 126, the drain inflow valve 84, the three-way valve 26, the three-way valve unit 28, the water amount sensor 68, and the water temperature sensor. 169 and the like, and collects detection information and outputs an instruction to a control target.

  The processor 160 is an example of arithmetic means used for executing the program, and executes a program for controlling the operation of the hot water supply / remedy device 40 that is a heat source device. The memory 162 is an example of a storage unit, for example, an OS (Operating System) that controls the basic operation of the heat source device, a combustion control program, a drain discharge processing program, detection data acquired from various sensors, and the like, It includes a processing area that performs arithmetic processing of programs. The memory 162 uses a ROM (Read Only Memory) or a nonvolatile memory as a storage area, and uses a RAM (Random Access Memory) as an arithmetic processing area.

  The timer 164 is an example of a clock unit that detects the operation time of the heat source device and a timer unit that measures an elapsed operation time. System communication unit 166 is an example of a communication function unit, and performs data communication with system communication unit 176 of remote controller control unit 170.

  The remote control control unit 170 is an example of a control device mounted on the bathroom remote control 102 or the kitchen remote control 104, and includes a processor 172, a memory 174, a system communication unit 176, and an I / O 178, respectively. In addition, the remote control unit 170 exchanges operation instructions with the display unit 180, the operation unit 182, the alarm unit 184, and the like included in each remote control device through the I / O 178. The remote control device includes, for example, a change in setting of the required temperature for hot water supply or remedy or a remedy instruction by a user operation, an indication of an abnormality in the hot water supply / remedy device 40, a warning notification, or the like.

  <Drain discharge processing>

  FIG. 7 shows an example of drain discharge management. This drain discharge management is an example of the drain discharge processing method or the drain discharge processing program of the present disclosure.

  In the drain discharge management, the control unit 32 determines the start or completion of the drain process based on the water level state of the drain in the drain tank 90, time information, or the elapsed time of combustion stop. The drain D generated by the latent heat recovery is stored in the drain tank 90 after the neutralization process. This generation of drain D is related to burner combustion. Moreover, it takes a predetermined time to reduce formaldehyde and the like by drain treatment. This drain treatment may take, for example, about 6 hours depending on the target substance and the treatment method. If a large amount of untreated drain D is mixed in the drain tank 90 during the drain treatment, the treatment time is further increased.

  Therefore, in this drain discharge management, for example, drain processing is performed in consideration of the combustion state of the burner and the management on the discharge side.

  In the drain discharge management, the control unit 32 determines whether or not preparation for discharging the drain D is completed (S11). In determining whether or not the discharge preparation is completed, for example, status information (for example, S30 and S37 described later) stored in the memory, drain that has already been drained is stored in the drain tank 90, and the like. What is necessary is just to judge the state of. When the drain discharge preparation is completed (YES in S11), the process proceeds to the discharge process. If the drain discharge preparation is not completed (NO in S11), it is determined whether or not the process is shifted to the drain process (S12). In this determination processing, for example, it may be determined whether the timer 164 has been operated or is currently operating.

When the control unit 32 determines that the drain D in the drain tank 90 is unprocessed and has not yet been processed (NO in S12), the water level detection information in the drain tank 90 is the sewage level (L). (S13). When the drain D of the drain tank 90 is not reached to the sewage level (L) (NO in S13), as a new drain D does not flow hardly maintains the standby state. When the water level in the drain tank 90 is equal to or higher than the lower water level (L) (YES in S13), it is determined whether or not the current time is a predetermined time set in advance (S14).

  The time condition is set based on, for example, whether or not the storage tank has a capacity capable of storing the newly generated drain D for the time required for the drain process, for example, by setting a time when the hot water supply / remedy device 40 is used less frequently. Also good. For this reason, the predetermined time may be set based on the usage frequency of the user, such as at midnight or when there is no daytime.

  When the current time is a predetermined time, for example, midnight (YES in S14), the control unit 32 closes the drain inflow valve 84 (S15) and shifts to the drain process. Even if the predetermined time has not come (NO in S14), if the water level in the drain tank 90 is equal to or higher than the upper water level (H) (YES in S16), the drain inflow valve 84 is closed (S15). ), Move to drain treatment. When the water level in the drain tank 90 reaches the upper limit, the drain process is started without waiting for a predetermined time.

  In the drain process, the circulation of the drain D is started in the drain tank 90 (S17), the timer 164 is started, and the elapsed time of the drain process is started (S18).

  Moreover, the control part 32 is the case where the water level in the drain tank 90 has not reached the upper water level (H) (NO in S16), and when the burner 50 is in a stopped combustion state (YES in S19). Circulation in the drain tank 90 is started (S17), and the process proceeds to the drain process. However, when the combustion state of the burner 50 is set as the drain treatment start condition, the drain inflow valve 84 is kept open. Accordingly, even when a hot water supply request is generated, it is not necessary to perform the opening / closing process of the drain inflow valve 84, and the secondary heat exchanger 46 has a restriction on the allowable amount of drain D generated according to the capacity of the storage space 82. Use can be prevented from being restricted. Further, even if it is not at a predetermined time, if the draining process can be completed when the long-time pursuit function is not used, the drain tank 90 and the storage space 82 are not filled and the use of the secondary heat exchanger 46 is restricted. Not.

  In this drain process, when it can be determined that the drain process can be completed in a short time, for example, when the amount of drain D (water level) accumulated in the drain tank 90 is small, control is performed so that the circulation process is not performed. May be. In this embodiment, the case where the drain tank water level and time information or the burner stop state is determined as the drain treatment start condition has been described. However, the present invention is not limited to this. As the drain process determination, the elapsed time from the most recent drain process, the frequency of occurrence of the previous drain process, the amount of drain D at that time, etc. are stored in the memory 162, and such information is stored in the next drain. You may utilize for judgment of the start condition of a process. Thereby, it can prevent that drain processing generate | occur | produces frequently and can anticipate the improvement in hot water supply efficiency, and the effect of an energy saving.

  When the drain process is started, the control unit 32 refers to the timer 164 and determines whether or not a predetermined time (for example, 6 hours) has elapsed (S20). If the predetermined time has not elapsed (NO in S20) and the drain inflow valve is not closed (NO in S21), for example, the combustion state of the burner 50 is monitored from the detection result of the frame rod 51 (S22). ). When combustion of the burner 50 is started (NO in S22), the timer 164 is stopped (S23), the drain tank circulation is stopped (S24), and the drain process is stopped. That is, when the drain process is started on the condition that the combustion is stopped, the use of the secondary heat exchanger is triggered by the start of combustion of the burner to return to the normal hot water supply operation.

  Further, in the drain process due to the combustion stop, when the burner 50 is in the combustion stop state (YES in S22), or when the drain process start time is reached (YES in S25), the drain inflow valve 84 is closed (S26). Continue processing.

  When a predetermined time has elapsed since the start of the drain process (YES in S20), the control unit 32 closes the drain inflow valve 84 if it is open (S27), stops the timer 164 (S28), and drains the tank. The circulation in 90 is stopped (S29), and the drain process is completed. When the drain process is completed, the control unit 32 stores the discharge preparation completion information in the memory 162 or the like (S30), establishes a drain discharge route, and starts the discharge process (S31).

  In establishing the drain discharge route, for example, it is determined whether or not the follow-up process is being executed, that is, whether or not the drain D can be discharged to the follow-up conduit 24, and then the three-way valve 26 is switched to the drain tank 90 side. Then, the three-way valve unit 28 is switched, and the follow-up pipeline 24-2 is connected to the drainage unit 30 side. Moreover, the control part 32 restrict | limits the memory of the bath water BW, when transfering to a drain discharge process.

  <Drain discharge treatment>

  When the drain discharge preparation is completed (YES in S11), the control unit 32 monitors the water level sensor 132 of the drain tank 90, and continues draining until it becomes equal to or lower than the sewage level (L) (YES in S32) (S33). ). When the water level in the drain tank 90 is equal to or lower than the sewage level (L) (NO in S32), the control unit 32 stops draining (S34), and after performing the drain discharge route cleaning process as necessary. Then, the memorial pipeline 24 is restored (S35). In the drain discharge route cleaning process, for example, after switching the three-way valve 26, the hot water or water is introduced through the pouring pipe line in a state where the three-way valve unit 28 is set to the drainage part 30 side, so that at least the memorial pipe line 24, the internal circulation pump 94, and the inside of the three-way valve unit 28 can be cleaned.

  When the cleaning process is completed, the drain inflow valve 84 is opened (S36), and the untreated drain D stored in the neutralizer 80 and the storage space 82 is allowed to flow into the drain tank 90. Thereafter, the control unit 32 deletes the discharge preparation completion information stored in the memory 162 (S37) and completes the drain discharge process.

  According to such a configuration, the following effects can be obtained.

  (1) Even when draining a specific substance such as formaldehyde, a hot water supply operation using a secondary heat exchanger can be performed, and a decrease in hot water supply efficiency can be prevented.

  (2) Since the drain inflow valve does not discharge untreated or insufficiently treated drain into the drain tank during the drain treatment, the reliability of the heat source device can be improved.

  (3) Even when an existing pipe line is used as a drain discharge path, untreated or insufficiently treated drain does not flow, so there is no contamination of bathtub water.

  (4) Further, since the drain treatment can be sufficiently performed, it is possible to reduce the environmental load due to the drain discharged to the outside from the heat source device.

  (5) In a state where no drain is generated, that is, by starting drain processing when combustion of the burner is stopped, drain processing can be performed according to the user's usage state with respect to the heat source device, and convenience can be improved. It is possible to prevent the drain from being discharged.

  [Other Embodiments]

  (1) In the above embodiment, as a means for storing the drain D generated when the drain inflow valve 84 is closed, a case in which the drain is stored in the storage space 82 formed in a part of the neutralizer 80 is shown. However, it is not limited to this. For example, as shown in FIG. 8, the hot water supply / remedy device 40 may include a storage tank 190 as a sub-tank on the drain line 159 as a position connected to the neutralizer 80. The storage tank 190 may be configured to store the drain D when, for example, the drain inflow valve 84 is closed, and may have a structure that allows the drain D to pass when the drain inflow valve 84 is in the open state.

  The storage tank 190 is not limited to being disposed between the neutralizer 80 and the drain tank 90, and may be installed on the drain line 12 and upstream of the neutralizer 80. .

  According to such a configuration, even when the drain process is started, the newly generated drain can be stored, so that the hot water supply process using the secondary heat exchanger can be continued.

  (2) In the above embodiment, the case of using barley stone as a catalyst as the treatment agent for performing the drain treatment has been described, but the present invention is not limited thereto. Other catalysts may be used if specific substances such as formaldehyde can be reduced. Moreover, you may use the adsorption agent which adsorb | sucks a specific substance as a processing agent. As this adsorbent, for example, a composite of an amino compound and a silicate inorganic compound may be used.

  (3) In the above embodiment, the case where the circulation pipe 124 and the circulation pump 126 are used as the swinging means in order to promote the drain treatment has been described, but the present invention is not limited to this. For example, a heater for heating the inside of the tank may be provided as a means for accelerating the decomposition and deletion processing of the specific substance contained in the drain D, or other means may be used.

  (4) In the above embodiment, in the establishment of the drain discharge route, it has been shown whether the three-way valve 26 and the three-way valve unit 28 are switched by judging whether or not discharge to the memorial pipeline is possible. Not exclusively. In the drain discharge management, for example, the drain discharge route may be established in conjunction with the tracking process control. The control unit 32 may determine whether or not it is a time when the drain discharge process can be performed by using a predetermined time condition, a user use frequency condition, or the like for the drain discharge process, for example. In the drain discharge process, for example, a drain discharge start time may be set so as to match a predetermined time required for the drain process with a condition in a time zone where the user's usage frequency is low, and the drain discharge route may be established.

  In addition, in the hot water supply / memorial function, when the user continuously uses the automatic hot water supply function, the automatic operation is temporarily canceled at the set time and when the user does not use the bath water BW. You may perform processing, such as doing.

  (5) In the drain discharge management, for example, when the drain D that has been drained cannot be discharged due to the use state of the user, the control unit 32 performs warning display and voice notification to the bathroom remote controller 102 and the kitchen remote controller 104 to discharge You may be prompted to make it possible.

  (6) In the above embodiment, the case where the water level sensor 132 is provided only in the drain tank 90 has been described, but the present invention is not limited thereto. A water level sensor may be provided in the neutralizer 80 or the storage tank 190 to monitor the storage state of the drain D. As a result, the controller 32 prevents the drain D from overflowing into the neutralizer 80 or the storage tank 190 when the drain D cannot be discharged because, for example, the remedy conduit 24 is in use. The storage speed of the drain D, the remaining storage amount, and the like may be calculated. Thereby, it is possible to prevent the drain D from overflowing into the apparatus due to the impossibility of drainage, and the safety can be improved.

  (7) In the above embodiment, when drain treatment is started and the drain inflow valve 84 is closed, the case where untreated drain is not allowed to flow into the drain tank 90 until the treated drain is discharged is shown. Not limited to. When the water level in the drain tank 90 has not reached the upper water level (H), for example, when the drain process is started according to the time condition, the control unit 32 opens the drain inflow valve 84 when a new drain is generated. Thus, the drain may flow into the drain tank 90. In this case, for example, a condition may be set such that the time elapsed at the start of the drain treatment is small, or that the neutralizer 80, the storage space 82, and the storage tank 190 are close to full water. In addition, when drain is newly introduced, the timer may be reset to start measuring a predetermined time required for the drain process.

As described above, the most preferable embodiment of the technology of the present invention has been described. The present invention is not limited to the above description. It goes without saying that various modifications and changes can be made by those skilled in the art based on the gist of the invention described in the claims or disclosed in the embodiments for carrying out the invention. It goes without saying that such modifications and changes are included in the scope of the present invention.

According to the present invention, the drain discharge pipe of the latent heat recovery type heat source device prevents untreated drain from being mixed into the drain tank that processes the specific substance, and stores the drain generated during the processing of the specific substance. By providing the means, the high heat recovery efficiency by the secondary heat exchanger can be maintained while cleaning the drain, which is useful.

2 Drain discharge system 4 Heat source device 6 Bath 8 Heat exchanger 10 Drain receiver 12 Drain line 14, 80 Neutralizer 16 Storage tank 18 Drain inflow valve 20, 90 Drain tank 22 Drain line 22-1 Tank side flow path 22 -2 Discharge side flow path 24 Remembrance line 24-1 Remembrance return line 24-2 Remembrance forward line 26 Three-way valve 28 Three-way valve unit 30 Drain part 32 Control part 40 Hot water supply / remembrance device 44 Primary heat exchange Unit 46 Secondary heat exchanger 50 Hot water supply burner 51 Frame rod 52 Remembrance burner 82 Reservation space 84 Drain inflow valve 92 Discharge conduit 94 Remembrance circulation pump 100 Electrical board 110 Tank main body 112 Drain inflow port 114 Partition wall 116 1st 118 Barley stone 120 Retaining part 124 Circulation pipe 126 Circulation pump 128 Treated water outlet 130 Second Space 132 level sensor 150 drain inlet 152 neutralizer 154 partition plate 156 space 158 outlet 190 storage tank

Claims (13)

A heat source device including a heat exchanger that generates drainage by heat exchange mainly recovering latent heat in combustion exhaust,
A neutralizer for taking in and neutralizing the drain generated in the heat exchanger;
The neutralized drain flows with neutralizer, and processing means for performing a drain process to reduce the specific substances from the drain by the treatment agent,
For the processing unit, an inflow control means for restricting the flow of the neutralized drain in the neutralizer,
It is connected to the processing means via the inflow control means, and when the inflow of the drain neutralized by the neutralizer to the processing means is restricted by the inflow control means , the heat exchanger generates the Storage means for storing drainage neutralized by the neutralizer ;
A discharge means for flowing the treated de Len in the processing means to the outside of the heat source device,
The inflow control means closes to initiate the drainage processing, the After draining from the processing means through said discharge means in response to the setting time has elapsed, by the admission control means in the open state, the storage means a reservoir was drained and the reservoir means and the neutralizer and the accumulated was controller of the drain Ru allowed to flow into the processing means,
A heat source device comprising: The processing means includes water level detection means for detecting the water level of the drain stored therein,
2. The heat source device according to claim 1, wherein when the water level inside the processing unit becomes equal to or greater than a threshold value from the detection result of the water level detection unit, the control unit causes the drain process to be executed.   The heat source device according to claim 1, wherein the control unit closes the inflow control unit based on a set processing start time and starts drain processing. It said processing means is provided with a flow means for causing flow of the drain within,
The heat source apparatus according to any one of claims 1 to 3, wherein the control unit operates the flow means at a drain processing execution timing.   5. The method according to claim 1, wherein the processing unit includes a catalyst material that changes a specific substance contained in the drain, or an adsorbent that adsorbs the specific substance contained in the drain. The heat source device described. The discharging means is
A memorial pipeline that allows the bath water in the bathtub to flow and memorialize,
A switching valve that is installed in a part of the remedy pipeline and guides the drain that has flowed through the remedy pipeline to the discharge side when draining;
The heat source device according to any one of claims 1 to 5, further comprising: Furthermore, it comprises combustion monitoring means for monitoring the combustion state of the combustion means of the heat source device,
2. The heat source according to claim 1, wherein when the combustion process of the combustion unit is not executed for a predetermined time or longer, the control unit maintains the inflow control unit in an open state and starts a drain process. apparatus.   The heat source device according to claim 7, wherein the control unit stops the drain process when there is an operation request to the combustion unit before completing the drain process.   The heat source device according to any one of claims 1 to 8, wherein the storage means is formed in a part of the neutralizer. A drain discharge processing method for a heat source device including a heat exchanger that generates drain by heat exchange mainly recovering latent heat in combustion exhaust,
Take in the drain generated in the heat exchanger and neutralize in the neutralizer,
In the treatment means into which the drain neutralized by the neutralizer flows, a drain treatment is performed to reduce specific substances contained in the drain by the treatment agent,
The inflow control means restricts the inflow of the drain neutralized by the neutralizer to the processing means,
When the inflow of the drain neutralized by the neutralizer is restricted to the inflow control means, the drain generated in the heat exchanger and neutralized by the neutralizer is passed through the inflow control means. Store in a storage means connected to the processing means ,
Flowing the treated de Len in the processing means to the outside of the heat source device,
Close the inflow control means to start the drain process,
From the processing unit via emissions means setting time in response to the After draining, the inflow control means by the open state, the storing means to the reservoir was drained and the reservoir means and the neutralizer, the drain which is accumulated on preparative Ru allowed to flow into the processing means,
The drain discharge processing method characterized by including a process. The water level of the drain stored in the processing means is detected by the water level detection means,
11. The drain discharge processing method according to claim 10, further comprising a process of performing a drain process when a water level inside the processing unit becomes equal to or greater than a threshold value from a detection result of the water level detection unit.   The drain discharge processing method according to claim 10 or 11, further comprising a process of starting the drain process by closing the inflow control unit based on a set process start time. A drain discharge processing program for causing a computer that controls a heat source device that generates drain by heat exchange to execute it,
The function of taking the drain generated by heat exchange into the neutralizer,
A function of closing the inflow control means and restricting the inflow of the drain neutralized by the neutralizer with respect to the processing means for executing the drain processing for reducing a specific substance contained in the drain by the processing agent,
When the inflow of the drain neutralized by the neutralizer is restricted to the processing means by the inflow control means, the drain generated by heat exchange and neutralized by the neutralizer is passed through the inflow control means. A function of storing in the storage means connected to the processing means,
The inflow control means closes to start drainage process according to the, the After draining from the processing means through the discharge means in response to the setting time has elapsed, by the admission control means in the open state, the storage means a drain or the reservoir means and the function of the drain, which is accumulated in the neutralizer Ru allowed to flow into the processing means, pooled,
A drain discharge processing program that causes a computer to execute.

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