JP2009150605A - Heat source device and drainage discharging processing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat source device capable of discharging harmful substances contained in a drainage generated by latent heat recovery by applying material change processing with the usage of a catalyst material and a drainage discharging processing method thereof. <P>SOLUTION: The heat source device 2 equipped with a heat exchanger (secondary heat exchanger 12) for recovering mainly latent heat in combustion exhaust and generating the drainage 16 by the heat exchange is provided with a processing means (drainage tank 26) for processing the drainage with the usage of the catalyst material (granite porphyry 114), a discharge means (drainage discharge pipe passage 28) for discharging the processed drainage to the outside of the heat source device, and a control part (control device 104) for controlling the discharge means and making the discharge means discharge the processed drainage when prescribed time has passed since processing by the processing means of the drainage was started. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a drain discharge process of a heat source device that uses a latent heat recovery type heat exchanger, and more particularly to a heat source device that discharges harmful substances such as formaldehyde remaining in the drain by changing the substance.

  Conventionally, in a hot water supply device or the like using a latent heat recovery type heat exchanger, the drain generated by heat exchange is not discharged to the outside of the device through a dedicated pipe, but is used with an existing pipe. There are things that are discharged to.

In this way, the drain generated by the recovery of latent heat in the hot water supply device is discharged to the bathtub side using the additional piping, and is provided with a drain receiver for recovering the generated drain, and a drain of a predetermined amount or more. Patent Document 1 discloses a “latent heat recovery type hot water heater” as a hot water heater that discharges to a bathtub using a memorial pipe according to the bathtub water level.
JP 2003-42566 A

  By the way, the drain generated by the latent heat recovery is strongly acidic and needs to be neutralized in consideration of the influence on the environment and the like, and is contained in the fuel gas that burns the burner. Depending on the component, for example, formaldehyde may be included as a methane-based combustion product.

  In such a configuration using a bathtub or the like for drainage, all drainage should be drained into sewage by draining only when the drainage plug of the bathtub is open, There is a risk that the drain may be mixed into the bath water.

  Regarding such inconvenience, there is no disclosure or suggestion in Patent Document 1, and there is no description about a configuration or the like for solving the inconvenience.

  Accordingly, an object of the present invention is to detoxify the drain by changing the formaldehyde contained in the drain generated by the recovery of latent heat to prevent the harmful substances from being mixed into the bath water.

  Another object of the present invention is to optimize the drain material change treatment by controlling drain discharge until the time required for the material change of the drain elapses.

  Another object of the present invention is to optimize the execution time of the detoxification process and the timing of the bathtub drainage process.

Another object of the present invention is to improve heat recovery efficiency by suppressing drain generation while adjusting drain discharge to the drain timing of bath water.

  Therefore, in order to achieve the above object, in the heat source device of the present invention, the drain is stored in a drain tank loaded with a catalytic substance that promotes a substance change with respect to formaldehyde and the like contained in the drain. It is the structure which drains. Further, during the drain substance change processing, the drain suppression control is performed in order to prevent the new drain from being mixed. With such a configuration, regarding drainage of drain using the bathtub, it is possible to prevent the drain containing harmful substances from being mixed into the bathtub water. Further, the drain can be reliably processed.

  Therefore, in order to achieve the above object, a first aspect of the present invention is a heat source device including a heat exchanger that mainly recovers latent heat in combustion exhaust gas and generates drain by the heat exchange. A processing unit for processing using a catalyst material; a discharging unit for discharging the drain after processing to the outside of the heat source device; and a discharge when the predetermined time has elapsed from the start of processing of the drain by the processing unit. And a control unit for controlling the means and causing the discharge means to discharge the drain after processing. With such a configuration, the above object can be achieved.

  In order to achieve the above object, in the heat source device, preferably, the amount of water flow to the heat exchanger side is suppressed, the drain suppressing means for suppressing the generation of the drain, and the drain for storing the recovered drain. A tank, a water level detecting means for detecting the water level of the drain accumulated in the drain tank, and an agitating means for stirring the drain in the drain tank, and the control unit is configured so that the water level detecting means has a predetermined water level. In the case where it is detected, it is possible to shift to the drain treatment mode and cause the drain suppression means to suppress the amount of water flow to the heat exchanger side and operate the stirring means. The above object can also be achieved by such a configuration.

  In order to achieve the above object, the heat source device preferably includes combustion monitoring means for monitoring a combustion state of the combustion means of the heat source device, and the control unit is stopped by the combustion monitoring means. In such a case, it may be configured to shift to the drain processing mode. The above object can also be achieved by such a configuration.

  In order to achieve the above object, in the heat source device, preferably, the control unit has an operation request to the combustion means before a predetermined time has elapsed from the start of the drain treatment, It is good also as a structure which cancels | releases the process mode of the said drain and stops the said stirring means. The above object can also be achieved by such a configuration.

  In order to achieve the above object, in the heat source device, preferably, the control unit has time information, and the drain process may be executed when a predetermined start time is reached. The above object can also be achieved by such a configuration.

  In order to achieve the above object, in the heat source apparatus, preferably, the control unit stores execution time information of the immediately preceding drain discharge process, and determines a start time of the next drain process according to the time information. It is good also as a structure to determine. The above object can also be achieved by such a configuration.

  In order to achieve the above object, in the heat source device, preferably, the catalyst material used for the material change of the drain may be a barley stone. The above object can also be achieved by such a configuration.

  Therefore, in order to achieve the above object, a second aspect of the present invention is a drain discharge processing method for a heat source device including a heat exchanger that mainly recovers latent heat in combustion exhaust and generates drain by the heat exchange. A step of processing the drain using a catalyst material, a step of discharging the drain after processing to the outside of the heat source device by a discharging unit, and a predetermined time from the start of the processing by the processing unit of the drain And a step of controlling the discharge means and causing the discharge means to discharge the drain after processing. With such a configuration, the above object can be achieved.

  In order to achieve the above object, in the drain discharge processing method of the heat source device, preferably, the amount of water flow to the heat exchanger side is suppressed to suppress the generation of the drain, and the recovered drain And a step of detecting the water level of the drain accumulated in the drain tank by a water level detection means, and agitating the drain in the drain tank by the agitation means. When the water level detecting means detects a predetermined water level, it may be configured to shift to the drain treatment mode, suppress the amount of water flow to the heat exchanger side, and stir the drain. The above object can also be achieved by such a configuration.

  In order to achieve the above object, in the drain discharge processing method of the heat source device, preferably, the method includes a step of detecting a combustion state of the combustion means of the heat source device, and the control unit is in a state where the combustion means is stopped. It is good also as a structure which transfers to the processing mode of the said drain, when this is detected. The above object can also be achieved by such a configuration.

  In order to achieve the above object, in the drain discharge processing method of the heat source device, preferably, the control unit makes an operation request to the combustion means before a predetermined time elapses from the start of the drain processing. In such a case, the drain processing mode may be canceled and the stirring unit may be stopped. The above object can also be achieved by such a configuration.

  In order to achieve the above object, in the drain discharge processing method of the heat source device, preferably, the control unit has time information, and when the predetermined start time is reached, the drain processing is executed. Also good. The above object can also be achieved by such a configuration.

In order to achieve the above object, in the drain discharge processing method of the heat source device, preferably, the control unit stores the previous drain discharge execution time information, and the next drain processing according to the time information. The execution time may be determined. The above object can also be achieved by such a configuration.

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

  (1) Since drain is detoxified and drain is discharged according to the timing of bath drainage, it is possible to prevent harmful substances from entering the bath water.

  (2) By forcibly stirring the drain accumulated in the drain tank, the change in formaldehyde substance can be further promoted, and the drain can be made more harmless.

  (3) By suppressing the generation of drain during the substance change treatment, it is possible to prevent the drain from being mixed into the drain tank, so that the drain can be reliably rendered harmless.

  (4) Considering the time conditions in the drain discharge process, the execution time of the substance change process can be secured by determining the execution start time of the substance change process according to the usage time zone of each individual heat source device. it can.

(5) Even if the generation of drain is suppressed between the material change treatment and the drain discharge, it is possible to minimize the decrease in heat exchange efficiency.

[First Embodiment]

  The heat source apparatus according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram illustrating a configuration of a heat source device. The heat source device shown in FIG. 1 is an example, and the present invention is not limited to this configuration.

  The heat source device 2 includes a hot water combustion chamber 4 that performs heat exchange for hot water supply, and a reheating combustion chamber 8 that tracks the bath water BW in the bathtub 6. The hot water supply combustion chamber 4 includes a primary heat exchanger 10 that mainly exchanges heat with sensible heat in the combustion exhaust gas, and a secondary heat exchanger 12 that mainly exchanges heat with latent heat in the combustion exhaust gas. The combustion chamber 8 is provided with a reheating heat exchanger 14 for exchanging heat mainly with sensible heat in the combustion exhaust gas. These heat exchangers can be operated in either a two-way operation mode or a single operation mode, and the primary heat exchanger 10 and the secondary heat exchanger for hot water supply are used as a function of utilizing one function in the other. It is possible to fill the bathtub 6 with hot water heated at 12.

  In the secondary heat exchanger 12, when the latent heat in the combustion exhaust gas is recovered, the water vapor in the exhaust gas is condensed, and drain 16 that is unnecessary water is generated. As described above, the drain 16 is strongly acidic and contains, for example, formaldehyde as a methane-based combustion product due to the components contained in the fuel gas.

  As a treatment means for the generated drain 16, a drain receiver 18 that collects the drain 16 is installed in the hot water combustion chamber 4 on the lower side of the secondary heat exchanger 12. Then, the collected drain 16 is led out of the hot water supply combustion chamber 4 through a drain pipe line 20 which is a part of the drain discharge means. The drain line 20 is connected to a neutralizer 22 arranged in the heat source device 2. The neutralizer 22 is loaded with, for example, calcium carbonate as a neutralizer 24 for neutralizing the strongly acidic drain 16.

  The neutralization method and the neutralization means in the neutralizer 22 are not limited to this, and any configuration can be used as long as the pH (pH) of the drain 16 is close to a neutral value. Good.

  In addition, a drain tank 26 for storing the neutralized drain 16 is installed in the drain pipe line 20. The drain tank 26 is used as a treatment tank for collecting the collected drain 16 until a discharge timing described later, and for changing the formaldehyde contained in the drain 16 as described later. Further, a drain discharge pipe 28 that guides the accumulated drain 16 to the discharge side of the heat source device 2 is connected to the lower side of the drain tank 26. The drain discharge pipe 28 is provided with a check valve 29 for preventing the backflow of the drain 16.

  Next, the piping configuration of the hot water supply function of the heat source device 2 will be described.

  The heat source device 2 is provided with a water supply pipe 32 that guides the clean water W from the water supply port 30 to the hot water combustion chamber 4 side. A flow rate sensor 34 for detecting the flow rate of the supplied clean water W and an incoming water temperature sensor 36 for detecting the water temperature are installed in the water supply pipe 32. The water supply line 32 is connected to a flow rate switching valve 40 that diverts the supplied clean water W to the secondary heat exchanger 12 side and the bypass line 38 side in the hot water combustion chamber 4. The flow rate switching valve 40 is, for example, a flow rate adjusting unit that adjusts the supply amount of clean water W to the secondary heat exchanger 12 side and the bypass pipe line 38 side arbitrarily or to a predetermined distribution ratio. A part of the drain suppressing means for suppressing the generation of the drain 16 described later is configured.

  Further, the bypass line 38 is used for a drain suppression process that suppresses the generation of the drain 16 to be described later, and the clean water W that has flowed into the bypass line 38 is clean water W heated by the secondary heat exchanger 12. And flows into the primary heat exchanger 10.

  With such a configuration, for example, when the flow rate switching valve 40 is controlled to perform normal latent heat recovery, water is not passed through the bypass pipe 38, and when the generation of the drain 16 is suppressed, the inside of the secondary heat exchanger 12 is controlled. In order to prevent boiling and emptying, control is performed so that a part of the supplied water W flows to the secondary heat exchanger 12 side and the remaining water W flows to the bypass pipe 38 side.

  Then, the clean water W heated by the primary heat exchanger 10 becomes high-temperature hot water HW, flows into the hot water supply line 42 configured on the outlet side of the primary heat exchanger 10, and reaches the hot water supply port 43. The hot water supply line 42 is connected to the hot water temperature sensor 44 that detects the temperature of the hot water HW after heat exchange and the hot water supply line 32, and a part of the supplied water W is supplied into the hot water supply line 42. A primary bypass line 46 is connected to improve the responsiveness to the hot water supply set temperature by flowing and joining the hot water HW. A bypass water control valve 48 that controls the amount of water supply of the clean water W is installed on the primary bypass conduit 46.

  Further, a water control valve 50 for controlling the amount of hot water supply and a mixed temperature sensor 52 for detecting the temperature of the temperature-adjusted hot water HW are installed on the hot water supply pipe line 42. In addition, a hot water supply line 54 for pouring hot water HW into the bathtub 6 is connected to the hot water supply line 42. On the pouring line 54, there are a pouring solenoid valve 56 for adjusting the pouring amount to the bathtub 6 side, a pouring amount sensor 58 for detecting the pouring amount, and means for cutting off the hot water supply side and the bath water BW. A check valve 60 is installed.

  Next, the piping configuration of the function for purging the bathtub water BW of the heat source device 2 will be described.

  The bathtub 6 is provided with a remedy circuit 62 that guides the bathtub water BW to the remedy combustion chamber 8, exchanges heat with the remedy heat exchanger 14, and returns the tub 6 to the bathtub 6 again. A circulation adapter 64 is attached to a connecting portion between the remedy circuit 62 and the bathtub 6, and plays a role of a connector that allows the bath water BW to flow into the remedy circuit 62 or out into the bathtub 6. The remedy circuit 62 includes a remedy circulation pump 66 that is a circulation means, a running water switch 68 that detects running water in the remedy circuit 62, a bath temperature sensor 70, a bath temperature sensor 72, and the bathtub 6. A bath water level sensor 74 for detecting the water level of the bathtub water is installed. Further, the pouring circuit 54 described above is connected to the chasing circuit 62, and the hot water HW is poured from the hot water supply function side into the bathtub 6 via the chasing circuit 62.

  In addition, in FIG. 1, although the pouring to the bathtub 6 is performed via the memorial circuit 62, it is not restricted to this, The structure which pours into the bathtub 6 directly may be sufficient.

  In this heat source device 2, the drain 16 provided in the bathtub 6 is used for discharging the drain 16 that has been subjected to the substance change treatment in the drain tank 26 described above, and is installed on the lower side of the drain tank 26. The drain discharge pipe 28 is connected to the remedy circuit 62. A switching valve 78 for connecting the drain discharge pipe 28 is installed in the memorial circuit 62. By switching the switching valve 78, the memorial circuit 62, the memorial circulation pump 66, the bathtub 6, and the discharge port 78 are arranged. Etc. constitute drain discharging means.

  As combustion means of the heat source device 2, a hot water supply burner 80 is installed in the hot water supply combustion chamber 4, and a memorial burner 82 is installed in the memorial combustion chamber 8. A fuel gas pipe 84 is installed as means for supplying the fuel gas G to the combustion means. An original gas solenoid valve 86 and a gas proportional valve 88 are installed in the fuel gas pipe 84 to adjust the supply amount of the fuel gas G to the heat source device 2. Further, a switching electromagnetic valve 90, a gas electromagnetic valve 92, and a switching electromagnetic valve 94 are installed on the hot water combustion chamber 4 side, and a gas electromagnetic valve 96 is installed on the additional combustion chamber 8 side. The amount of fuel gas G supplied to the vehicle is adjusted.

  Fans 98 and 100 for introducing combustion air are installed in the hot water supply combustion chamber 4 and the additional combustion chamber 8, respectively. In addition, for example, a flame rod is installed in the hot water supply combustion chamber 4 as a flame detection sensor 102 that determines whether or not combustion is being performed by detecting the flame of the burner 80.

  The heat source device 2 is provided with a control device 104 for controlling a material change process, a drain process, a generation suppression process of the drain 16 and the like, which will be described later, in addition to operation control such as hot water supply and bath water pursuit. Yes. The control device 104 is connected to the external remote control device 106. The external remote control device 106 is installed, for example, in a bathroom where the bathtub 6 is installed or in a kitchen where hot water is supplied. In FIG. 1, only one is shown, but a plurality are connected. It is possible. The external remote control device 106 is a setting input unit for setting the temperature of the heat source device 2 and the like, and is also a state output unit for outputting an operation state and the like of the heat source device 2.

  Next, FIG. 2 is referred about the structure of a drain tank. FIG. 2 is a diagram showing an internal configuration of the drain tank 26. The same parts as those in FIG. 1 are denoted by the same reference numerals.

  As described above, the drain tank 26 is a processing unit that collects the drain 16 generated by heat exchange and accumulates it until the timing of the discharge process, and changes the substance of the collected drain 16 inside.

  The drain tank 26 is provided with an inlet 108 on the ceiling side. For example, the drain 16 neutralized by the neutralizer 22 flows from the inlet 108 into the drain tank 26. On the bottom side of the drain tank 26, there is provided a discharge port 110 for flowing to the drain discharge pipe 28 side, and an overflow port 112 for preventing overflow is installed on the upper side of the side surface. Yes.

  In addition, a predetermined amount of barley stone 114 as a catalytic substance is loaded in the drain tank 26 as a processing means for the recovered drain 16. Further, as stirring means for stirring the drain 16, circulation ports 116 and 118 are provided on the ceiling side and the bottom side of the drain tank 26, a stirring circulation path 120 for circulating the drain 16 is installed, and a power source for stirring processing is provided. A circulation pump 122 is installed.

  For example, a water level sensor 124 including three electrodes is installed in a part of the drain tank 26 as a water level detection unit of the drain 16. The water level sensor 124 is provided with a COM 126 as the longest electrode among the three electrodes. The water level sensor (L) 128 has the same length as the COM 126 and detects the presence or absence of the drain 16 in the drain tank 26. And a water level sensor (H) 130 for detecting the water level immediately before the overflow, that is, the full water state of the drain tank 26, and detecting the start water level of the drain generation suppression described later. In such a configuration, the water level in the drain tank 26 is detected by the conduction between the COM 126 and the water level sensor (L) 128 or the water level sensor (H) 130. In addition, for example, a net-like partition 132 is installed to prevent contact between each electrode of the COM 126, the water level sensor (L) 128, and the water level sensor (H) 130 and the barley stone 114.

  With this configuration, when the process proceeds to the substance change process for the drain 16 described later, the circulation pump 122 is operated in the drain tank 26 to circulate the drain 16 into the stirring circulation path 120. Thereby, the formaldehyde contained in the drain 16 is changed into a polysaccharide by the barley stone 114 as a catalyst. Moreover, the substance change of formaldehyde is promoted by stirring the drain 16.

  Further, as shown in FIG. 2, the drain tank 26 is provided with a step on the bottom side, and the circulation port 118 is disposed at a position lower than the discharge port 110, so that even if the drain 16 is discharged. A staying part 134 in which a part of the drain 16 stays is configured. The staying portion 134 is also loaded with barley stone 114.

  When the substance change process of the drain 16 is completed, the drain 16 is discharged from the drain tank 26 when the drain discharge timing described later comes. In this case, a part of the processed drain 16 is discharged to the staying part 134. Instead, it will stay. In this way, a part of the treated drain 16 is retained in the drain tank 26 because the sugar once changed from formaldehyde to tricarbon sugar is remarkably changed to tetracarbon sugar and pentose sugar due to further substance change. It has the property of promoting the reaction. This is because this reaction promoting effect, so-called formose reaction, can be expected for formaldehyde contained in the newly accumulated drain 16.

  Examples of chemical formulas relating to the substance change from formaldehyde to sugar are as follows.

  In this way, by changing the formaldehyde contained in the drain 16 to a saccharide, it is possible to prevent the harmful substances from being mixed when the bathtub 6 or the like is used for discharging the drain 16.

  Next, FIG. 3 will be referred to regarding the configuration of a control unit that performs operation control and the like of the heat source device. FIG. 3 is a diagram illustrating a configuration of the control device. In FIG. 3, the same parts as those in FIG.

  The control device 104 includes a microcomputer and the like, and includes a processor 136, a storage unit 138 that stores a program related to operation control of the heat source device 2, and a RAM (Random-Access Memory) 140. The control device 104 includes a water level sensor (L) 128, a water level sensor (H) 130 installed in the drain tank 26, a bath water level sensor 74 installed in the remedy circuit 62, a running water switch 68, and the like. As the sensors, detection signals from the flame detection sensor 102 for detecting the combustion state of the hot water supply burner 80, such as the flowing water sensor 34, the incoming water temperature sensor 36, the bath temperature sensor 70, the bath temperature sensor 72, etc., are input, and the heat source Based on the operation control of the apparatus 2, a switching valve 78 that switches the drain discharge path, a flow rate switching valve 40 that suppresses the generation of the drain 16, a circulation pump 122 that stirs the drain 16 in the drain tank 26, and a memory circuit. Control instruction to the recirculation pump 66 for flowing bath water and the like in the timer 62, the timer 142 which is a time measuring means for operation control of the heat source device 2, and other functional parts To output.

  The processor 136 includes, for example, a CPU (Central Processing Unit) and the like, and executes an operation control program stored in the storage unit 138.

  The storage unit 138 includes a ROM (Read-Only Memory). For example, the storage unit 138 stores various setting values, data, and the like in addition to an OS (Operating System) and a program related to substance change processing and drain generation suppression control of the drain 16 described later. Stored. The RAM 140 functions as a processing area for performing various arithmetic processes.

  Further, as described above, the control device 104 is connected to the control unit 144 of the external remote control device 106 by wire or wirelessly. The external remote control device 106 includes, for example, a control unit 144 including a processor, an operation unit 146, a display unit 148, and an alarm unit 150. The control unit 144 includes, for example, a CPU, a ROM, a RAM, and the like. In addition to transmitting the instruction to the control device 104 according to the operation instruction input from the operation unit 146, the control unit 144 also transmits the instruction of the heat source device 2 to the display unit 148. The configuration is such that the operating state is displayed or a warning notification is given by the alarm unit 150.

  Next, the substance change process and the discharge process for the drain of the heat source device 2 will be described with reference to FIGS. FIG. 4 is a flowchart relating to the operation control of the heat source device, FIG. 5 is a flowchart showing a substance change process of formaldehyde according to the first embodiment, and FIG. 6 is a flowchart showing the first embodiment. FIG. 7 is a flowchart showing a drain discharge process according to the present invention. 4, 5, 6, and 7 are examples, and the present invention is not limited to this.

  As shown in FIG. 4, the operation control of the heat source device 2 according to the first embodiment is performed when the heat source device 2 is turned on, reading the model setting and initializing the output contents to the RAM 140 and each unit. Initialization processing such as initialization and initial test is performed (step S1). Next, after executing the process of formaldehyde contained in the drain 16 (step S2) and the discharge management process of the drain 16 (step S3), it is determined whether or not the hot water tap is opened (step S4). In the case of executing this hot water supply operation (YES in step S4), hot water supply operation control is performed (step S5).

  In addition, after the hot water supply operation control is performed or when the hot water supply operation is not performed (NO in step S4), for example, an automatic switch is turned on by operating the operation unit 146 of the external remote control device 106 or the like. As a determination as to whether or not to execute, it is determined whether or not an execution request for processing using the bathtub 6 such as automatic hot water filling or chasing control is made (step S6). When execution of this bathtub management is requested | required (YES of step S6), the process according to a request | requirement, such as automatic hot water filling to the bathtub 6, and a memorial execution, is performed.

  And after execution of bathtub management operation (Step S7) or when execution of bathtub management is not demanded (NO of Step S6), for example, freeze prevention etc. are performed as other control about heat source device 2 ( Step S8).

  Each operation control process described above does not necessarily shift to the next step until it ends once it starts, but is a configuration that repeatedly executes these processes.

  Next, the formaldehyde treatment shown in FIG. 5 will be described.

  This process is a process executed in step S2 of FIG. As shown in FIG. 1, the heat source device 2 is configured to collect the drain 16 generated by the heat exchange of the latent heat and store it in the drain tank 26. The generation of the drain 16 is linked to the combustion of the hot water supply burner 80 and the heat exchange thereof. is doing. On the other hand, as described above, a certain amount of time is required for the substance change process using the barley stone 114 which is the catalyst substance for the recovered drain 16. Therefore, when the hot water supply burner 80 is burned during the execution of the substance change process, when a new drain 16 is generated and flows into the drain tank 26, a further time for the substance change process is required.

  Therefore, in this embodiment, when the hot water supply burner 80 is not burned during the substance change process of formaldehyde, that is, the new drain 16 is not mixed in the drain tank 26 during the substance change process for a predetermined time. Is completed when the substance change process is completed.

  Further, when the drain tank 26 becomes full before the substance change process is completed, the substance change process is a process that is performed with priority in order to discharge the drain 16, and therefore the drain using the bypass pipe 38 is used. 16 occurrence suppression processing is executed.

  In this embodiment, the formaldehyde substance change process of the drain 16 is based on whether or not the hot water supply burner 80 that is the source of the drain 16 is stopped.

  First, the storage unit 138 and the like of the control device 104 are accessed, and it is confirmed whether or not the substance change process is completed and the preparation for the discharge process is completed for the drain 16 stored in the drain tank 26 ( Step S11). If the preparation for discharge has already been completed (YES in step S11), nothing is performed in this substance change process, and the process proceeds to the above-described drain discharge management (step S3: FIG. 4). When the preparation for discharging the drain 16 is not completed (NO in step S11), it is determined whether the substance change process is being executed (step S12).

  (1) Processing when drain material change processing is not in progress

  When the substance change process is not being executed (NO in step S12), it is determined whether or not the water level in the drain tank 26 has reached the water level sensor (H) 130 with reference to the water level sensor 124 (step S13).

  When the drain 16 has reached the water level (H) (YES in step S13), the drain 16 generation suppression process is executed (step S14), and the process proceeds to the drain 16 processing mode. That is, since the drain tank 26 has reached the full state, the heat source device 2 shifts from the priority state of the thermal efficiency by the latent heat recovery to the priority state of the drain 16 discharge process. Therefore, in order to prevent the new drain 16 from entering the drain tank 26, the generation of the drain 16 is suppressed. In the drain generation suppression process, the flow rate switching valve 40 that is a drain suppression means is switched. As described above, when the flow rate switching valve 40 is switched to the drain suppression processing state, the flow rate of the clean water W flowing to the secondary heat exchanger 12 side is limited with respect to the clean water W supplied to the heat source device 2. Then, the remaining amount is allowed to flow to the bypass line 38 side. In this case, the clean water W flowing to the secondary heat exchanger 12 side is suppressed to such an extent that the clean water W does not boil in the secondary heat exchanger 12, for example.

  When the drain generation suppression is started, a circulation process of the drain tank 26 is started as a substance change process of formaldehyde contained in the drain 16 (Step S15), and a time for executing the substance change process is started (Step S16). As described above, the circulating pump 122 is operated, and the time measurement by the timer 142 is started.

  When the drain 16 in the drain tank 26 has not reached the water level (H) (NO in step S13), the detection result by the flame detection sensor 102 is referred to determine whether the hot water supply burner 80 is stopped. (Step S17).

  If combustion of hot water supply burner 80 is stopped (YES in step S17), whether or not the drain 16 in the drain tank 26 is equal to or higher than the water level (L), assuming that the condition for shifting to the treatment mode of the drain 16 is satisfied. Is determined (step S18). In the detection of the water level of the drain 16, for example, it is determined whether or not the drain tank 26 is in a drained state. If the water level does not reach the water level sensor (L) 128, the drain 16 is being drained. The formaldehyde substance change process is not performed (NO in step S18). If the water level of the drain 16 is equal to or higher than the water level sensor (L) 128 (YES in step S18), the process proceeds to step S15 to perform a formaldehyde substance change process.

  (2) Processing when drain material change processing is in progress

  When the substance change process is being executed (YES in step S12), the timer 142 is referred to confirm the elapsed time from the start of the substance change process. Then, for example, it is determined whether or not 6 hours have elapsed as the predetermined time T from the start of the substance change processing (step S19), and the predetermined time T has already elapsed since the start of the substance change processing In (YES in step S19), in order to end the substance change process, the stirring process of the drain 16 in the drain tank 26 is ended (step S20). In addition, the storage unit 138 is notified of completion of discharge preparation and stored (step S21). If it is detected again in step S11 that the discharge preparation is complete (YES in step S11), the process proceeds to the drain 16 discharge process.

  If the predetermined time T has not elapsed since the start of the substance change process (NO in step S19), the process proceeds to a determination of whether to interrupt the substance change process. That is, in this embodiment, as described above, when the combustion is stopped, the substance change process of formaldehyde contained in the drain 16 is executed, and before the process is completed, a new drain 16 is placed in the drain tank 26. If it is mixed in, repeat the substance change process.

  In this case, first, the water level in the drain tank 26 is determined by the water level sensor (H) 130 in order to determine whether or not the material change process currently being executed is started due to the water level in the drain tank 26. Is determined (step S22). That is, when the water level of the drain tank 26 is full according to the determination in step S13 and the drain generation suppression process (step S14) is being executed, the drain 16 is newly mixed even if the hot water supply burner 80 is in combustion. In addition, since it is necessary to prioritize the drain 16 discharge process, if the drain tank 26 is at or above the water level (H) (YES in step S22), the substance change process is continued.

  When the drain tank 26 does not reach the water level (H) (NO in step S22), that is, when the substance change process being performed is not caused by the water level of the drain tank 26, the flame detection sensor 102 causes the hot water supply burner. It is determined whether or not 80 is stopped (step S23). If it is determined that hot water supply burner 80 is stopped (YES in step S23), the substance change process is continued. When the hot water supply burner 80 starts combustion (NO in step S23), the processing mode is canceled, the circulation (stirring) processing of the drain 16 in the drain tank 26 is stopped (step S24), and the timer 142 is set. Stop and stop the timing of the substance change process (step S25).

  Next, the drain discharge management of the heat source device 2 shown in FIG. 6 will be described.

  This drain 16 discharge management is the processing content shown in step S3 of FIG.

  It is determined whether the formaldehyde substance change process for the drain 16 in the drain tank 26 is completed and the preparation for discharging the drain 16 is completed (step S31). Therefore, for example, with reference to the storage unit 138, it is determined whether or not a record of completion of discharge preparation or a flag or the like due to the end of the substance change process for the drain 16 is stored. If the discharge preparation is not completed (NO in step S31), the drain discharge management is terminated.

  If the preparation for discharging the drain 16 is completed (YES in step S31), a drain discharging process for discharging the drain 16 from the heat source device 2 is performed (step S32). In this drain discharge process, the process of discharging the drain 16 subjected to the substance change process in accordance with the drainage processing timing of the bathtub 8 is shown.

  Thus, when the drain process of the drain 16 is completed, the storage of the discharge preparation completion stored in the storage unit 138 is erased (step S33) to prepare for the next substance change process for the drain 16. In addition, with the completion of the draining process of the drain 16, the generation suppression process of the drain 16 is canceled again to improve the thermal efficiency (step S34), and the supply of the clean water W to the secondary heat exchanger 12 side is resumed. 16 discharge management is terminated.

  Next, the drain discharge process shown in FIG. 7 will be described.

  This drain discharge process is the process shown in step S32 of FIG. 6. For example, when the drain 16 that has been prepared for discharge is stored in the drain tank 26 and the drain port 76 in the bathtub 6 is opened. The bath water level sensor 74 detects the water level change of the bath water BW, and the detection of the bath water level change is transmitted to the control device 104. And according to the detection of the water level change, or after confirming that the water level change continued for a predetermined time and the bathtub 6 is in a drained state, the drain 16 is discharged.

  In the drain discharge process, the switching valve 78 is switched by a control instruction from the control device 104 (step S41), the remedy circuit 62 and the drain discharge pipe 28 are connected, and a drain 16 discharge path to the bathtub 6 side is formed. To do.

  After switching the switching valve 78, the recirculation circulation pump 66 is driven (step S42), and the discharge of the drain 16 from the drain tank 26 to the bathtub 6 is started.

  The discharge of the drain 16 is monitored by the water level sensor 124 in the drain tank 26, and is performed until the water level of the drain 16 becomes the water level (L) 128 or less (step S43).

  If it is determined that the water level sensor (L) is 128 or less (NO in step S43), the recirculation circulation pump 66 is stopped (step S44) and the switching valve 78 is switched (step S45). The dredging circuit 62 is connected to the bathtub 6 and the drain discharge path is released.

  In this drain discharge process, for example, hot water HW is poured from the pouring conduit 54 to the remedy circuit 62 in accordance with the drain 16 discharge process, and adheres to the remedy circuit 62 and remains. The drain 16 may be washed.

  With such a configuration, while the hot water supply burner 80 is stopped in combustion, that is, when the hot water supply device 2 is not in use, the material change process for the drain 16 is performed, so that the material change of formaldehyde can be performed without hindering the use of the heat source device 2, Since the substance change process is continuously executed in this manner, the preparation for discharging the drain 16 can be completed when the bathtub 6 is drained, and the drain 16 can be discharged reliably. In addition, when a new drain 16 is mixed during the substance change process on the drain 16, the substance change process is performed again. Further, when the drain tank 26 becomes full, the generation of the drain 16 is suppressed. By doing so, the drain 16 is not mixed into the drain tank 26 anew, and the drain 16 is discharged after the necessary time has elapsed, so that the time for the substance change treatment can be secured and the substance change of the formaldehyde can be ensured. Since it can be performed, it can prevent that a harmful substance mixes in bathtub water BW.

[Second Embodiment]

    Next, a heat source device according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a flowchart showing a formaldehyde substance change process of the heat source device according to the second embodiment, and FIG. 9 is a flowchart showing drain discharge management according to the second embodiment. The specific processing contents and the order thereof shown in FIGS. 8 and 9 show an example of the embodiment of the present invention, and are not limited thereto.

  The configuration of the heat source device 2 according to this embodiment is the same as that of the first embodiment. Regarding the configuration of the heat source device 2, the configuration of the drain tank 26, the configuration of the control device 104, and the control process of the heat source device 2. It is the same as FIGS. 1-4, and abbreviate | omits description.

  In this embodiment, the formaldehyde substance change processing timing is executed in accordance with a time zone in which the use frequency of the heat source device 2 is low. That is, the generation of the drain 16 is caused by the operation of the hot water supply burner 80. Further, the substance changing process of formaldehyde contained in the drain 16 takes a certain time, and if a new drain 16 is mixed in the drain tank 26 during this process, it is necessary to redo the substance changing process. Therefore, the substance change process is performed in a time zone set in advance as a time zone in which the use frequency of the heat source device 2 is low. Moreover, regarding the substance change process of drain discharge management, the execution start time of the next substance change process is determined according to the drainage time of the bathtub 6.

  First, the storage unit 138 and the like of the control device 104 are accessed, and it is confirmed whether or not the substance change process is completed and the preparation for the discharge process is completed for the drain 16 stored in the drain tank 26 ( Step S51). When the preparation for discharge is not completed (NO in step S51), the process proceeds to the determination of whether or not the substance change process is currently being performed (step S52).

  (1) Processing when drain material change processing is not in progress

  If the substance change process is not being executed (NO in step S52), whether or not the current time is, for example, midnight as the predetermined time T1, as a determination of the transition condition to the next substance change process mode A determination is made (step S53). As described above, the start time is set in such a time zone that the use frequency of the heat source device 2 is low and the time required for the substance change process is secured.

  When it is the predetermined time T1 (YES in step S53), it is determined whether or not the water level in the drain tank 26 is equal to or higher than the water level sensor (L) 128 (step S54), and the drain 16 to be subjected to the substance change process is determined. It is determined whether or not it is in the drain tank 26. When the water level in the drain tank 26 is equal to or lower than the water level sensor (L) 128 (NO in step S54), the substance change processing mode is terminated. When the water level sensor (L) is 128 or more (YES in step S54), the generation of the drain 16 is suppressed in order to shift to the material change processing mode (step S55). This drain generation suppression process is to prevent new drain 16 from being mixed into the drain tank 26 during the substance change process, and is the same process as in the first embodiment, and thus the description thereof is omitted. The drain generation suppression process is continued until the drain 16 is discharged.

  And in order to stir (circulate) the drain 16 in the drain tank 26, the drive of the circulation pump 122 is started (step S56). Further, the timer 142 for measuring the processing time of the substance change process is started (step S57).

  If the predetermined time T1, which is the time condition for shifting to the substance change processing mode, has not been reached (NO in step S53), the drain 16 is connected to the water level sensor (H) as a confirmation of whether the drain tank 26 is full. ) It is confirmed whether it has reached 130 (step S58). If the drain 16 has not reached the water level sensor (H) 130 (NO in step S58), the substance change process is terminated, and if the drain 16 has reached the water level sensor (H) 130 (YES in step S58). Shifts to the drain generation suppression process of step S55, and performs a substance change process. In this case, for example, the fact that the execution of the substance change process is due to the full condition of the drain tank 26 is stored in the storage unit 138, the RAM 140, or the like.

  (2) Processing when drain material change processing is in progress

  When the substance change process is being performed on the drain 16 (YES in step S52), the timer 142 of the control device 104 is referred to, and the first time condition is, for example, 6 hours as the predetermined time T2 from the start of the substance change process. It is confirmed whether or not the above has elapsed (step S59). If the predetermined time T2 has not elapsed (NO in step S59), the substance change process is continued, and if the predetermined time T2 has elapsed (YES in step S59), the circulation pump 122 is stopped. Then, stirring of the drain 16 is stopped (step S60). Then, for example, the discharge preparation completion is stored in the storage unit 138 of the control device 104 (step S61).

  (3) Processing after completion of substance change processing

  When the drain 16 is ready to be discharged (YES in step S51), the timer 142 is referred to, and the second time condition is, for example, 10 hours or more as the predetermined time T3 from the start of the substance change processing start time. It is determined whether or not it has elapsed (step S62). This second time condition is a condition for preventing the drain generation suppression process from continuing indefinitely when the state in which the bathtub 6 is not drained continues despite the completion of the material change process.

  Therefore, if the predetermined time T3 has not yet elapsed (NO in step S62), the process waits until the bathtub 6 is in a drained state, and if the predetermined time T3 has already elapsed (YES in step S62). Stops the timer 142 and initializes the measured value (step S63).

  Next, the storage unit 138 and the like of the control device 104 are accessed, and it is confirmed whether or not the substance change process executed this time is due to the water level of the drain tank 26 (step S64). That is, it is determined whether or not the drain tank 26 has reached the water level sensor (H) 130. As a result, when the drain tank 26 is full of water and the drain 16 cannot be accumulated any more (YES in step S64), the remaining water in the bathtub 6 is determined as to whether or not the drain can be drained into the bathtub 6. It is determined whether or not there is (step S65). The presence / absence of residual water in the bathtub 6 is confirmed by, for example, driving a recirculation circulation pump 66 installed in the retreat circuit 62 and confirming the flow of the drain 16 in the retreat circuit 62 with the running water switch 68.

  When there is residual water in the bathtub 6 (YES in step S65), the generation of the drain 16 is continuously suppressed, and when there is no residual water (NO in step S65), the drain discharge process shown in FIG. After performing (Step S66), the storage of the discharge preparation completion stored in the storage unit 138 and the like is deleted (Step S67), and the generation suppression process of the drain 16 is also canceled (Step S68).

  Further, when the drain 16 can be stored in the drain tank 26, that is, when the current substance change process is not based on the water level in the drain tank 26 (NO in step S64), latent heat recovery is enabled. Therefore, the process proceeds to step S67.

  When a predetermined time T3 has elapsed since the start of the substance change process, the display unit 148 and the alarm unit 150 of the external remote control device 106 are informed so as to urge the user of the heat source device 2 to drain. You may do it.

  In addition, when the execution of the substance change process is based on the water level condition of the drain tank 26 (YES in step S64), if there is residual water in the bathtub 6 (YES in step S65), in addition to the warning notification described above, step The number of initialization processes of the timer 142 in S63 may be counted, and the drain 16 may be forcibly discharged according to the count number.

  Next, the drain discharge management shown in FIG. 9 will be described.

  This drain discharge management is the process shown in step S3 of FIG. 4, and in addition to the drain 16 discharge process, the start time of the substance change process is determined. As described above, the drain 16 discharges according to the drainage timing of the bathtub 6. Further, in the heat source device 2, during the process of changing the formaldehyde substance with respect to the drain 16, in order to prevent the newly generated drain 16 from being mixed into the drain tank 26, the drain generation is suppressed to stop the recovery of latent heat. Therefore, in this drain discharge management, the start time of the substance change process is determined according to the use state of the heat source device 2 in order to shorten the thermal efficiency decrease time due to the drain generation suppression as much as possible.

  Since the drain 16 is discharged in accordance with the drainage timing of the bathtub water BW, it is detected whether or not the bathtub 6 is draining (step S71). To confirm the drainage of the bath water BW, the bath water level sensor 74 first detects a drop in the water level due to a decrease in the bath water. Thereafter, the recirculation circulation pump 66 is driven, and the flow switch 68 determines whether or not there is water flowing in the retreat circuit 62 when the water level of the bathtub water falls below the circulation adapter 64. From the above, it is determined whether or not the drain plug in the bathtub 6 is removed and drainage is performed.

  When the bathtub water is not drained (NO in step S71), the drain discharge management is terminated. If drainage is being performed (YES in step S71), the storage unit 138 and the like are referred to and it is confirmed whether or not it is recorded that preparation for discharging the drain 16 is completed (step S72). .

  (1) Processing when drain preparation is complete

  When the drain discharge preparation is completed (YES in step S72), it is determined whether or not the discharge preparation is caused by the water level in the drain tank 26 (step S73). That is, in the substance change process shown in FIG. 8 described above, it is determined whether or not the drain tank 26 has shifted to the substance change process due to reaching the water level sensor (H) 130 (step S58). Thereby, when the drainage preparation in case the drain 16 is above the predetermined water level is completed (YES in step S73), the predetermined time T1 set as the transition time condition to the substance change processing mode is maintained.

  Further, when the preparation for discharge is completed without being caused by the water level of the drain 16 (NO in step S73), that is, when the predetermined time T1 of the substance change process is reached before the drain tank 26 becomes full (FIG. 8). In step S54 YES), the start time of the next substance change process is determined again (step S74). It can be determined that the drain 16 could still be stored in the drain tank 26 at the predetermined time T1. Therefore, in the determination of the start time (step S74), the start time of the next substance change process is determined from the timing at which the drain plug of the bathtub 6 is removed. For example, the time information when the drainage of the bath water in step S71 was performed by the timer 142 is acquired. Then, referring to the acquired time information, a time at which a predetermined time T2 required for the substance change process can be secured is calculated, and determined as the start time of the next substance change process.

  The determination process of the transition start time to the processing mode (step S74) will be described with a specific example. For example, the start time of the previous substance change process is set to midnight, and the tub 6 is drained. Is performed at 10 am the next morning. In this case, if the predetermined time T2 required for the substance change treatment is set to 6 hours, the next substance change treatment is calculated backward from 10 am when drainage is performed, and starts at 4 am 6 hours ago. Reset the time.

As described above, while maintaining the time required for the substance change process as the start time of the substance change process,
By determining on the basis of the time of drainage, it is possible to shorten the execution time of the drain generation suppression as much as possible and improve the thermal efficiency by latent heat recovery.

  When the drainage preparation is completed due to the water level in the drain tank 26 (YES in step S73) and when the start time is determined (step S74), the drain discharge process shown in FIG. 7 described above is performed. (Step S75), the storage of the discharge preparation completion stored in the storage unit 138 is erased (step S76), and the drain generation suppression process is canceled (step S77). Further, if necessary, the pipes may be washed by pouring from the hot water supply side to the remedy circuit 62 side (step S78).

  (2) Processing when drain preparation is not completed

  If preparation for discharging the drain 16 is not completed (NO in step S72), the process proceeds to a determination of whether or not the inside of the drain tank 26 is currently undergoing a substance change process (step S79). If the process is in progress (YES in step S79), the process proceeds to a determination as to whether or not the substance change process has started due to the water level in the drain tank 26 (step S80). Since this determination is the same as step S73 described above, a description thereof will be omitted.

  If the substance change process is started due to this determination due to the water level in the drain tank 26 (YES in step S80), the set start time T1 of the substance change process is maintained as it is.

  In addition, when it is not caused by the water level of the drain tank 26 (NO in step S80) or when the substance change process is not currently being performed (NO in step S79), the substance change start time T1 is determined again (step S81). That is, in these cases, although the drainage of the bathtub 6 is performed, the substance change process is not executed (step S79), or at the set start time T1, the drainage timing of the bathtub 6 is reached. The condition is not in time (NO in step S80).

  The determination method of the start time is performed by back-calculating the time T2 required for the substance change process based on the drainage time of the bathtub 6 as in step S74 described above.

  The time T2 required for the substance change process is an example, and is not limited to this. For example, the time T2 can be changed according to the concentration of formaldehyde contained in the drain 16, and can be arbitrarily determined. Further, in the determination of the start time of the substance change process (steps S74 and S81), the method of performing the calculation using the minimum time T2 required for the substance change process is exemplified. However, the α time is added to the predetermined time T2. You may make it calculate.

  Moreover, although it is set as the structure which performs determination of the starting time of a substance change process in said example, for example, about the drainage implementation time of the bathtub 6, an average is taken for one week, one month, etc., and this average value is utilized. The start time may be determined.

  With such a configuration, the discharge process of the drain 16 is executed according to a predetermined time condition, and the substance change process is determined by determining the execution start time of the substance change process according to the use time zone of the heat source device 2. Execution time can be secured. In addition, when a predetermined time has elapsed from the start of the substance change process, the drain generation suppression is canceled regardless of drainage, and the start time of the substance change process is set based on the drainage execution time of the bathtub 6. By deciding, while ensuring the time for the substance change treatment, it is possible to reliably change the formaldehyde substance to prevent the harmful substances from entering the bathtub and to minimize the decrease in thermal efficiency.

  [Other Embodiments]

  (1) The heat source device 2 in the above embodiment has a configuration in which the barley stone 114 as the catalyst material is loaded to a height of more than half of the drain tank 26, but is not limited thereto, as shown in FIG. It is good also as a structure which comprises the catalyst box 160 which loaded the barley stone 114 in the predetermined | prescribed container, and installs this in the stirring circulation path 120 of the drain 16. FIG. According to such a configuration, the drain tank 26 can be reduced in size, and since the water level sensor 124 and the catalytic substance do not come into contact with each other, the partition 132 is not necessary, and the configuration of the drain tank 26 is simplified. can do.

  (2) In addition, the drain tank 26 may be configured to be loaded with a catalyst material only in the retention portion 134. That is, the barley stone 114 is a catalyst substance that promotes material change, and the barley stone 114 may be disposed at a position corresponding to the circulation flow path of the drain 16 because the drain 16 may be disposed at a position where the drain 16 reliably contacts during circulation. For example, the substance change process can be performed as described above.

  (3) In the above embodiment, the stirring circulation pump 122 is provided for the stirring means installed in the drain tank 26. However, the present invention is not limited to this, and the stirring circuit 120 is partly used in the memory circuit 62. The drain 16 may be stirred by using the recirculation circulation pump 66.

  (4) In the above embodiment, the drain port 76 in the bathtub 6 is used for discharging the drain 16, but the present invention is not limited to this. For example, the return side of the memorial circuit 62 to the bathtub 6 is branched, Or you may make it flow the drain 16 to the waste_water | drain side with the circulation adapter 64. FIG.

  (5) In the above-described embodiment, barley stone 114 is used as an example of a catalyst material that promotes a substance change treatment of formaldehyde contained in drain 16, but is not limited thereto, and a catalytic effect that promotes substance change of formaldehyde to a polysaccharide. In addition to certain basic catalysts and clay mineral catalysts, an adsorbent that takes in harmful substances may be used.

  (6) In the above embodiment, only one drain tank 26 is illustrated. However, the present invention is not limited to this, and a plurality of drain tanks 26 are installed, and one drain tank 26a is in the process of substance change. The drain 16 may be stored in another drain tank 26b. Alternatively, one drain tank 26 may be divided into a plurality of sections.

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

The present invention relates to a substance change process of harmful substances remaining in the drain of a heat source device using a latent heat recovery type heat exchanger, and suppresses the generation of drain and prevents mixing of untreated drain during the substance change process. Therefore, it is possible to reliably perform the material change treatment of the drain, and to secure the time necessary for the material change treatment by setting the material change treatment time according to the time zone when the use frequency of the heat source device is low. Can do. Furthermore, since the start time of the material change process can be determined in accordance with the drainage timing on the bathtub side, and the execution time of the drain generation suppression is minimized, the recovery efficiency of the combustion heat can be improved, which is useful.

It is a figure which shows the structure of a heat-source apparatus. It is a figure which shows the internal structure of a drain tank. It is a figure which shows the structure of a control apparatus. It is a flowchart regarding the operation control of the heat source device. It is a flowchart which shows the substance change process of formaldehyde which concerns on 1st Embodiment. It is a flowchart which shows the drain discharge management of the heat-source apparatus which concerns on 1st Embodiment. It is a flowchart which shows the discharge process of a drain. It is a flowchart which shows the substance change process of formaldehyde of the heat-source apparatus which concerns on 2nd Embodiment. It is a flowchart which shows the drain discharge management which concerns on 2nd Embodiment. It is a figure which shows the modification of a drain tank.

Explanation of symbols

2 Heat source device 4 Hot water supply combustion chamber 6 Bath 12 Secondary heat exchanger 16 Drain 18 Drain receiver 20 Drain line 26 Drain tank 28 Drain discharge line 38 Bypass line 40 Flow rate switching valve 62 Remembrance circuit 66 Remembrance circulation pump 68 Flowing water switch 76 Drain port 78 Switching valve 102 Flame detection sensor 104 Control device 114 Barley stone 120 Stirring circulation path 122 Circulation pump 124 Water level sensor 128 Water level sensor (L)
130 Water level sensor (H)

Claims (13)

A heat source device including a heat exchanger that mainly recovers latent heat in combustion exhaust and generates drain by the heat exchange,
Processing means for processing the drain using a catalytic material;
Discharging means for discharging the drain after the treatment out of the heat source device;
A control unit that controls the discharging unit when the predetermined time has elapsed from the start of the processing by the processing unit of the drain, and causes the discharging unit to discharge the drain after processing;
A heat source device comprising:
The heat source device according to claim 1,
Drain suppression means for suppressing the amount of water flow to the heat exchanger side and suppressing the generation of the drain;
A drain tank for storing the collected drain;
Water level detecting means for detecting the water level of the drain accumulated in the drain tank;
Stirring means for stirring the drain in the drain tank;
With
When the water level detection unit detects a predetermined water level, the control unit shifts to the drain treatment mode, causes the drain suppression unit to suppress the amount of water passing to the heat exchanger side, and operates the stirring unit. A heat source device characterized in that
The heat source device according to claim 2,
Combustion monitoring means for monitoring the combustion state of the combustion means of the heat source device,
The control unit shifts to the drain processing mode when the combustion means is stopped by the combustion monitoring means.
The heat source device according to claim 2,
The control unit cancels the drain processing mode and stops the agitation means when an operation request is made to the combustion means before a predetermined time elapses from the start of the drain treatment. A heat source device characterized by.
In the heat source device according to claim 1, 2, 3, or 4,
The said control part has time information, and when the predetermined start time comes, the process of the said drain is performed, The heat source apparatus characterized by the above-mentioned.
The heat source device according to claim 5,
The said control part memorize | stores the execution time information of the last drain discharge process, and determines the start time of the next said drain process according to this time information, The heat source apparatus characterized by the above-mentioned.
The heat source device according to claim 1, 2, 3, 4, 5 or 6,
The heat source device according to claim 1, wherein the catalyst material used for the material change of the drain is barleystone.
A drain discharge processing method for a heat source device including a heat exchanger that mainly recovers latent heat in combustion exhaust and generates drain by the heat exchange,
Treating the drain with a catalytic material;
Discharging the drain after treatment out of the heat source device by a discharge means;
When a predetermined time has elapsed from the start of processing by the drain processing means, controlling the discharging means, causing the discharging means to discharge the drain after processing;
A drain discharge processing method for a heat source device, comprising:
In the drain discharge processing method of the heat source device according to claim 8,
Suppressing the amount of water flow to the heat exchanger side and suppressing the generation of the drain; and
Storing the collected drain in a drain tank;
Detecting the water level of the drain accumulated in the drain tank by a water level detection means;
Stirring the drain in the drain tank with stirring means;
Including
When the water level detecting means detects a predetermined water level, the control unit shifts to the drain treatment mode, suppresses the amount of water flow to the heat exchanger side, and stirs the drain. Drain discharge processing method for heat source device.
In the drain discharge processing method of the heat source device according to claim 9,
Detecting the combustion state of the combustion means of the heat source device,
When the control unit detects that the combustion means is stopped, the control unit shifts to the drain processing mode.
In the drain discharge processing method of the heat source device according to claim 9 or 10,
The control unit cancels the drain processing mode and stops the agitation means when there is an operation request to the combustion means before a predetermined time elapses from the start of the drain treatment. A drain discharge processing method for a heat source device.
In the drain discharge processing method of the heat source device according to claim 8, 9, 10, or 11,
The said control part has time information, and when the predetermined start time comes, the said drain process is performed, The drain discharge processing method of the heat-source apparatus characterized by the above-mentioned.
In the drain discharge processing method of the heat source device according to claim 12,
The control unit stores drain drain execution time information immediately before, and determines the next drain processing execution time according to the time information.

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