JP2009270798A - Drain discharge device and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify equipment and prevent inclusion of drain in inside of a bath tub, in a drain discharge device for performing drain discharge processing by using part of a reheating means of a hot water supply-reheating device. <P>SOLUTION: The drain discharge device is provided with a first switching means (selector valve 64) for switching connection of a reheating pipe line 46 with the bath tub 6 side or a drain recovery means (drain pipe line 96) side and with a second switching means (three-way valve 66) installed downstream of the first switching means of the reheating pipe line 46 and switching connection of the reheating pipe line 46 with the bath tub 6 side or a water discharge (water discharge pipe line 70) side. At predetermined drain discharge timing, the first switching means and/or the second switching means is switched, so as to make drain flow to the water discharge side via the reheating pipe line 46. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to drainage generated by heat exchange, and more particularly, to a drainage discharge device and a method for draining drainage to a bathroom drainage unit while using a bath water replenishing unit and branching in front of the bathtub.

  In a condensing (high efficiency) device that recovers latent heat in combustion exhaust, a strong acid drain is generated during heat exchange. For this reason, the drainage generated is drained by providing a dedicated drainage pipe. For example, if the generated drain is left or discarded outside the device as it is, there is a possibility of causing a trouble of the device, and also affecting the environment around the device.

As a method of using an existing pipe without providing a dedicated drain pipe and discharging it to a drainage facility in the bathroom, Patent Document 1 uses a drain-dedicated pipe or a forward pipe of a bath hot water system. The case is disclosed.
Japanese Patent Laying-Open No. 2005-337710 (abstract, paragraph numbers 0037, 0039)

  By the way, when draining drainage to the drainage channel on the bathtub side using the existing piping of the existing hot water supply piping, a pump for draining is separately required. Moreover, since the forward piping of the bath hot water supply piping is used, it is indispensable to clean the traces of the drainage after draining. When installing condensing (high-efficiency) equipment in apartment buildings, etc., install dedicated drainage pipes and pumps for the treatment of unnecessary water (drain) such as condensate generated from problems such as limited installation space. In many cases, this is difficult, and even if it is provided, there is a disadvantage that the cost increases.

  Such a request or problem is not disclosed or suggested in Patent Document 1, and there is no description about a configuration or the like for solving the request or problem.

  Accordingly, an object of the present invention relates to a drain discharge device for a hot water supply / remembrance device, and is to simplify the operation by using a part of the remedial means together.

Another object of the present invention is to prevent the drain from being mixed into the bathtub in the drain discharge process.

  In order to achieve the above object, the present invention provides a drain discharge device for a hot water supply / remedy device having a function of replenishing hot water and bath water and having a heat exchanger for exchanging heat of combustion exhaust, A first switching means for switching the connection between the pipe line and the drain collecting means, and a second switching means which is installed on the downstream side of the tracking circuit and switches the tracking pipe line to the drainage channel side. , By switching between the first switching means and the second switching means, by using a part or all of the memorial conduit, and draining to the drain side of the bathroom, for drain drain separately No piping is installed, and the drain is prevented from being mixed into the bathtub by timing the predetermined drainage.

  Therefore, in order to achieve the above object, the drain discharge device of the present invention is a drain discharge device for a hot water supply / remedy device that includes a heat exchanger for exchanging heat of combustion exhaust gas and has a hot water supply function and a bathtub replenishment function. The drain recovery means for recovering the drain generated by the heat exchange of the heat exchanger and guiding the drain to the remedy conduit side, and the connection between the remedy conduit and the bathtub side or the drain recovery means side is switched. A switching means, a second switching means installed on the downstream side of the first switching means of the tracking pipe, and for switching the connection of the tracking pipe to the bathtub side or the drainage side; and the first And a control unit that switches the switching unit and / or the second switching unit and causes the drain to flow to the drainage side through the memorial conduit. With such a configuration, drainage can be discharged using existing piping, and the collected drain is not mixed into the bathtub water in the bathtub.

  In order to achieve the above object, in the drain discharge device, preferably, the drain recovery means stores a drain tank that stores the drain until a predetermined discharge timing, and a water level of the drain stored in the drain tank. A water level sensor to detect, when the water level of the drain in the drain tank reaches a predetermined value based on a detection result by the water level sensor, the bath water refilling process and / or the bath side It is good also as composition which stops pouring operation to water, and makes it transfer to drain discharge processing, and is provided with flowing water detection means which detects the flow of bathtub water in the memorial pipe, and the control means detects the flowing water According to the detection result of the means, when the bathtub water is flowing in the remedy pipe line, the drain discharge process may not be performed, and the remedy pipe line The control means may be configured to switch the first switching means after the drain discharge process and shift to the pipe cleaning process. It is good also as a structure provided with the inflow prevention valve installed in the upstream rather than the said 1st switching means on a path | route, and preventing that bath water flows in into the said memorial pipe line. An inflow prevention valve for preventing the inflow of bath water and a water injection pipe for injecting hot water or water into the additional pipe, and when the cleaning timing is reached, the first switching means is switched, The inflow prevention valve may be closed, and hot water or water may be poured from the water injection pipe to the remedy pipe to wash the inside of the remedy pipe, and the control means may include the piping. When it is time for cleaning, the bath in the bathtub is in the memorial pipeline. It is good also as composition which takes in water, and the 2nd above-mentioned change means takes in bathtub water from the bathtub, and flows it to the outgoing pipe side of the memorial pipe line, and the bathtub from the return pipe side of the memorial pipe line It is good also as a structure which guides water and flows into the said bathtub side. The above object can also be achieved by such a configuration.

  In order to achieve the above object, the drain discharge method of the present invention is a drain discharge method for a hot water supply / replacement device that includes a heat exchanger for exchanging heat from combustion exhaust and has a hot water supply function and a bathtub replenishment function. A step of recovering the drain generated by heat exchange by the heat exchanger, a step of guiding the recovered drain to the side of the additional conduit, and a connection between the additional conduit and the bathtub side or the drain recovery means side. A step of switching by the first switching means, a step of switching the connection between the follow-up pipe line and the drainage side by the second switching means when discharging the drain, the first switching means and / or the And switching the second switching means to flow the drain to the drainage side through the follow-up conduit. With such a configuration, the above object can be achieved.

In order to achieve the above object, the drain discharge method preferably includes a step of detecting a flow of bathtub water in the remedy pipeline, and the bath water is added to the remedy pipeline according to a flow water detection result. May flow to the drain discharge process, and the step of storing the drain in a drain tank until a predetermined discharge timing, and the drain of the drain stored in the drain tank When the water level of the drain in the drain tank reaches a predetermined value according to the step of detecting the water level and the water level detection result, the bath water pursuit operation and / or the hot water pouring operation to the bathtub side are stopped. A step of switching between the first switching means and / or the second switching means, and when the cleaning timing comes, the first switching means. And a step of closing the inflow prevention valve to prevent inflow of bath water into the remedy pipeline, and pouring hot water or water from the irrigation pipeline into the remedy pipeline. And a step of performing a cleaning process in the pipeline. The above object can also be achieved by such a configuration.

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

  (1) Drain is discharged outside the equipment using the existing memorial pipeline, so no drain piping is required, and the equipment can be downsized and reduced in cost.

  (2) Since drainage is discharged to the drainage pipe for bathtubs, it is not necessary to install a drainage drainage separately.

  (3) Since the drain discharge process is not performed when the remedy pipe is in use, the drain does not enter the bath water.

  (4) When the specified amount of drainage has accumulated, by discontinuing use of the remedy pipeline and discharging the drainage, it is possible to prevent the drainage from entering the bath water and to prevent the drain from overflowing. , Systematic drainage becomes possible.

(5) Since the cleaning process of the remedy pipe line is performed in accordance with the draining process, it is possible to prevent the drain remaining in the spilling pipe from mixing into the bath water during the post-discharge process. Hygienic.

[First Embodiment]

  For the first embodiment of the present invention, reference is made to FIG. FIG. 1 is a diagram illustrating an example of a hot water supply / remembrance device. The configuration shown in FIG. 1 is an example, and the present invention is not limited to this.

  The hot water supply / remedy device 2 has a hot water supply combustion chamber 4 for exchanging heat of the water W for hot water supply as a hot water supply function, and a heat for heating the bathtub water BW in the bathtub 6 as a memorial function. And a combustion chamber 8 for replacement. The hot water supply combustion chamber 4 includes a primary heat exchanger 10 that mainly exchanges heat with sensible heat in the combustion exhaust, and a secondary heat exchanger 12 that mainly exchanges heat with latent heat in the combustion exhaust. The remedy combustion chamber 8 includes a remedy heat exchanger 14 that exchanges heat between the combustion exhaust and the bathtub water BW. These heat exchangers 10, 12, and 14 can be operated in either of two-way operation mode or single operation mode, and as a function of utilizing one function on the other side, the primary heat exchanger 10 for hot water supply and Hot water heated by the secondary heat exchanger 12 can be filled in the bathtub 6.

  On the hot water supply function side, the water W entering from the water supply port 16 enters the secondary heat exchanger 12 through the water supply pipe 22 provided with the water amount sensor 18 and the incoming water temperature sensor 20, and in this secondary heat exchanger 12. After heat exchange, the primary heat exchanger 10 performs heat exchange. The hot water heated by this heat exchange reaches the hot water supply port 26 side through the hot water supply pipe 24. A hot water temperature sensor 28 that measures the temperature of hot water after heat exchange is installed on the hot water supply pipe 24. Moreover, in order to improve the responsiveness with respect to the setting temperature at the time of hot water supply, the primary bypass pipe line 30 which mixes water with the hot water after heat exchange is installed ranging over the primary heat exchanger 10. A bypass water control valve 32 for controlling the flow rate of the water W to be mixed is installed on the primary bypass conduit 30.

  Further, a water control valve 34 that controls the amount of hot water supply and a mixed temperature sensor 36 that detects the temperature of the hot water HW adjusted by mixing water are installed on the hot water supply pipe 24. The hot water supply pipe 24 is connected to a hot water supply pipe 38 for pouring hot water HW into the bathtub 6 side. On this pouring pipe line 38, there are a pouring solenoid valve 40 for adjusting the pouring amount to the bathtub 6 side, a pouring amount sensor 42 for measuring the pouring amount, and means for cutting off the hot water supply side and the bath water BW. A check valve 44 is provided.

  Next, the piping configuration of the bath water BW tracking function of the hot water supply / tracking device 2 will be described.

  The memorial pipe 46 is connected to the bathtub 6 by a circulation fitting 48, and guides the bathtub water BW to the memorial combustion chamber 8 side and the chased bathtub water BW to the bathtub 6 side. The forward pipe 462 is configured. In the bath water purging process, the water is guided to the heat exchanger 14 through the return pipe 461, and is subjected to additional heating, and reaches the bathtub 6 through the forward pipe 462.

  On the return pipe 461, a bath temperature sensor 50 that detects the temperature of the bath water BW that has flowed in, a water level sensor 52 that detects the water level of the bath water BW in the bathtub 6 by pressure, and a bathtub in the memorial pipe 46. A circulation pump 54 that is a power source for flowing the water BW and a flowing water switch 56 that detects a flow state in the memorial pipe 46 are installed. Thereby, when the circulation pump 54 is driven, the presence or absence of flowing water is detected by the flowing water switch 56, and when the bathtub water BW that can be circulated exists in the bathtub 6, the flowing water switch 56 becomes conductive. In addition, the return pipe 461 has a two-way valve 58 that is an inflow prevention valve for preventing the bath water BW from flowing into the memorial pipe 46, and a hot water supply combustion chamber 4 as a first switching means. Is provided with a switching valve 64 for switching the connection between the drain tank 62 that collects the drain 60 generated in step S3 and the remedy conduit 46. In addition, the above-described pouring pipe line 38 is connected between the two-way valve 58 and the switching valve 64, and hot water or water is poured into the remedy pipe line 46 side.

  The forward pipe 462 is provided with a bathing temperature sensor 65 for detecting the temperature of the bath water BW which is heated after being heated to flow toward the bathtub 6, and a three-way valve 66 as a second switching means for the drain discharge means. . One side of the three-way valve 66 is connected to a conduit that allows the bathtub water BW to flow to the bathtub 6 side, and the other side flows, for example, to a drain pan 68 attached outside the bathtub 6 as drainage means such as a bathroom. A drain line 70 is connected.

  Next, an example of the configuration of the combustion means of the combustion chambers 4 and 8 of the hot water supply / remembrance device 2 will be described.

  On the hot water supply combustion chamber 4 side, a hot water supply primary heat exchanger 10 and a secondary heat exchanger 12 that are heat exchange means, a burner 72 that is a heat source, and an air supply fan 74 that is an air supply means are provided. . Further, on the side of the combustion chamber 8 for remedy, in addition to the heat exchanger 14 for remedy, a burner 76 as a heat source and an air supply fan 78 as an air supply means are provided.

  The burners 72 and 76 are provided with a fuel gas pipe 80 as means for supplying the fuel gas G. The fuel gas pipe 80 is provided with an original gas solenoid valve 82 and a gas proportional valve 84, and a switching solenoid valve 86, a gas solenoid valve 88, a switching solenoid valve 90, and a burner 76 side on the burner 72 side. A gas solenoid valve 92 is installed. With such a configuration, the opening degree of the gas proportional valve 84 and the like is controlled when the combustion amount of the burners 72 and 76 is controlled based on the set temperature for hot water supply or reheating.

  Next, an example of a drain discharge device provided in the hot water supply / remedy device 2 for the drain generated by heat exchange will be described.

  A drain receiver 94 for collecting the generated drain 60 is installed in the secondary heat exchanger 12 of the hot water combustion chamber 4, and a drain conduit 96 for discharging the drain 60 is provided in the drain receiver 94. is set up. The drain line 96 includes a neutralizer 98 for neutralizing the recovered drain 60 and a drain tank 62 for storing the neutralized drain 60. The drain tank 62 is connected to a switching valve 64 installed in the memorial conduit 46. On the drain line 96, a check valve 100 is installed between the switching valve 64 and the drain tank 62 to prevent backflow.

  The neutralizer 98 is loaded with, for example, calcium carbonate as a neutralizing agent for neutralizing the strongly acidic drain 60.

  The neutralization method and the neutralization means by the neutralizer 98 are not limited to this, and any configuration may be used as long as the drain 60 is close to a neutral value.

  Further, the drain tank 62 is means for accumulating the drain 60 after neutralization. For example, when a predetermined drainage timing arrives, or when the accumulated drain 60 reaches a predetermined water level in the drain tank 62, etc. Furthermore, it is the structure discharged | emitted to the memorial pipe line 46 side.

  The drain tank 62 includes, for example, an inflow port 102 for allowing the drain 60 to flow from the neutralizer 98 on the upper side surface thereof, and a drain port 104 for flowing the drain 60 toward the memorial conduit 46 on the bottom side. Yes. Inside the drain tank 62, for example, two electrodes having different lengths are installed as water level sensors for detecting the water level of the accumulated drain 60. The short electrode is a water level sensor H106 for detecting the upper limit level H in the drain tank 62, and the long electrode is a water level sensor L108 for detecting the lower limit level L. That is, the water level sensors 106 and 108 detect the empty level below the lower limit level L, the drainable level range below the upper limit level H from the lower limit level L, and the required drainage level above the upper limit level H.

  From the above configuration, the drain 60 generated by the heat exchange of the heat exchanger 12 is collected by the drain receiver 94 by the collecting means and the discharging means of the drain 60, flows into the drain pipe 96, passes through the drain tank 62. Guided to the memorial pipeline 46. Then, the water is guided to the drain side of the bathroom by a three-way valve 66 installed in the memorial pipeline 46, and the drain 60 is discharged from the hot water supply / memorial device 2.

  The hot water supply / remembrance device 2 is provided with a control device 110 for controlling the hot water supply control and the rehabilitation process, the drain suppression process described later, and the operation of the circulation pump 54 and the like. This control device 100 is connected to an external remote control device such as a bathroom remote control device 112 and a kitchen remote control device 114 outside the hot water supply / memorial device 2, and performs control for changing a set temperature, a hot water supply command, and the like.

  Next, FIG. 2 is referred about the structure of the three-way valve which is a 2nd switching means. FIG. 2 is a diagram illustrating an example of a three-way valve unit according to the first embodiment. In FIG. 2, the same parts as those in FIG. Moreover, the structure shown in FIG. 2 is an example, and is not limited to this.

  In the hot water supply / remedy device 2 according to this embodiment, the recovered drain 60 is stored in the bathtub by switching the three-way valve 66, which is the second switching means installed in the memorial pipe 46, to the drain side. For example, it is discharged to the drain pan 68 in the bathroom without flowing into the interior 6.

  The three-way valve 66 constitutes a three-way valve unit 116 as shown in FIG. 2A, for example. In the three-way valve unit 116, an inflow side connection port 118 for connecting the forward pipe 462 of the memorial pipe 46 is formed on the lower side. At the connection port 118, the bath water BW flows in during the memory process, and the drain 60 flows in during the drain process. In addition, as the connection port on the outlet side of the three-way valve unit 116, the connection port 120 on the right side in the figure is connected to the circulation fitting 48 installed in the bathtub 6. Further, the drain port 70 leading to the drain means such as a bathroom is connected to the connection port 122 on the left side of the figure.

  A motor 124 for operating the valve is installed on the upper side of the three-way valve unit 116. As for the internal configuration of the three-way valve unit 116, as shown in FIG. 2B, for example, a spherical valve unit 127 in which a flow path 125 is formed is configured, and the valve unit 127 is used by using the driving force of the motor 124. The left and right outlet-side connection ports 120 and 122 are switched with respect to the inflow-side connection port 118. That is, based on a control signal from the control device 110 or the like, the flow from the heat exchanger 14 for remedy to the circulation fitting 48 and the drain line 70 side opened from the heat exchanger 14 in front of the bathtub 6 to the side. The flow is switched.

  Therefore, from the configuration of the drain discharge device described above, when drain is discharged, the switching valve 64 as the first switching means is switched so that the drain 60 can flow from the drain tank 62 to the remedy conduit 46 side. At the same time, the three-way valve 66 that is the second switching means is switched so that the drain 60 passes from the heat exchanger 14 side through the memorial pipe line 46 to the drain pipe line 70 side from the three-way valve 66 in front of the bathtub 6. Shed. In this way, a drain discharging means using a part of the memorial pipe 46 is formed, and the drain 60 is discharged to the drain pan 68 in the bathroom.

  Next, FIG. 3 is referred with respect to the configuration of the control device provided in the hot water supply / memorial device. FIG. 3 is a block diagram showing a control device of the hot water supply / memorial device. In FIG. 3, the same parts as those in FIG. Moreover, the structure of FIG. 3 is an example, Comprising: It is not limited to this.

  The control unit 126 of the control device 110 is constituted by, for example, a microcomputer, and stores a CPU (Central Processing Unit) 128 that executes an operation control program, a program related to operation control of the hot water supply / remedy device 2, and the like. Unit 130, RAM (Random-Access Memory) 132, and the like. The control unit 126 receives detection signals from the water level sensor L108 of the drain tank 62, the water level sensor H106, the water level sensor 52 that detects the water level of the bathtub 6, the flowing water switch 56, and other sensors. Based on the operation control of the memorial device 2, a control instruction is applied to the switching valve 64, the three-way valve 66, the two-way valve 58, the circulation pump 54, and other functional parts. In addition, the timer 134 is a time measuring unit related to the process control of the hot water supply / remedy device 2 and the drain discharge process, and is configured to be provided inside the control unit 126 as well as provided outside the control unit 126 as shown in FIG. May be.

  The storage unit 130 includes a ROM (Read-Only Memory), a flash memory, and the like. For example, in addition to a program related to an OS (Operating System) and drain 60 discharge processing and cleaning processing, various setting values, data, and the like are stored. Stored. The RAM 132 functions as a processing area for performing various arithmetic processes.

  The control unit 126 is connected to the control unit 136 of the bathroom remote control device 112 or the kitchen remote control device 114, which is an external remote control device, so that mutual communication or the like can be performed by wire or wireless. In addition to the control unit 136, each remote control device 112, 114 includes an operation unit 138 such as a key switch, a display unit 140, a sound notification unit 142, and the like. The control unit 136 includes, for example, a CPU, a ROM, a RAM, and the like. The control unit 136 transmits the instruction to the control device 110 side in response to the operation instruction input from the operation unit 138, and also supplies hot water / memorial to the display unit 140. The operation state of the apparatus 2 is displayed, and a warning notification is given by the sound notification unit 142.

  Next, FIG. 4 is referred with respect to the main operation processing of the hot water supply / memorial device. FIG. 4 is a flowchart showing a main process of the hot water supply / memorial device. Note that this processing content is an example, and the present invention is not limited to this processing content.

  When the power is turned on, initialization processing such as reading of model settings, initialization of output, and initial test is executed (step S1). Next, as a process that is always performed, after the drain tank management process (step S2) in which drainage or the like is performed according to the state of the water level of the drain 60 accumulated in the drain tank 62, the process proceeds to a determination as to whether or not to perform a hot water supply operation. (Step S3). In the determination of the hot water supply operation, for example, the opening and closing of the hot water tap installed in the hot water supply port 26 may be monitored to determine whether or not the hot water supply operation has been started by opening the hot water tap. In the case of executing the hot water supply operation (YES in step S3), a hot water supply operation control process is performed (step S4).

  After the hot water supply operation control process or when the hot water supply operation is not executed (NO in step S3), the process proceeds to a determination as to whether the drain 60 discharge process is being executed (step S5). When drain discharge is not performed (NO in step S5), the process proceeds to determination of whether or not bathtub management is being performed (step S6). In this bathtub management, for example, the presence or absence of bathtub-related operations such as execution of automatic hot water filling by turning on an automatic switch configured in the operation unit 138 such as the remote control device 112, 114, execution of bath water BW tracking, etc. is determined. (Step S6) When bathtub management is being executed (YES in Step S6), bathtub management operation control processing such as automatic hot water filling and chasing control is executed (Step S7).

  After the bathtub management operation control process and when drain 60 is being discharged (YES in step S5), or when bathtub management is not being performed (NO in step S6), etc. Is executed (step S8), and the process returns to step S2. Note that each control does not necessarily shift to the next step until it is finished once started, but performs necessary control while always repeating these processing loops.

  Next, the management of the drain tank 62 described in the main process (FIG. 4) of the hot water supply / memoriing device 2 will be described with reference to FIG. FIG. 5 is a flowchart showing a drain tank management process. Note that this processing content is an example, and the present invention is not limited to this processing content.

  In the management process of the drain tank 62, it is determined whether or not to perform the drain process of the drain 60 based on the monitoring of the water level of the drain 60 accumulated in the drain tank 62 and the usage state of the tracking pipe 46. ing. Therefore, it is determined whether or not the water level of the drain 60 is equal to or higher than the water level sensor H106 (step S11). That is, it is determined whether or not the water level in the drain tank 62 has reached the limit water level. Thereby, when it is more than the water level sensor H106 (YES of step S11), it is judged whether the memorial conduit 46 is in use (step S12). That is, in this hot water supply / remedy device 2, since a part of the memorial pipe 46 is used for the drain 60 discharge processing, for example, during bath water BW chasing or pouring water into the bath 6 In such a case, the drain 60 is not discharged. In determining whether the memorial pipe 46 is in use, for example, whether the circulation pump 54 is stopped, the hot water solenoid valve 40 is closed, or the pouring operation to the memorial pipe 46 or the bathtub 6 is performed. Judgment based on what is going on.

  When the memorial pipe 46 is not in use (NO in step S12), the process proceeds to a drain 60 discharge process (step S13). Further, when the drain 60 is not equal to or higher than the water level sensor H106 (NO in step S11) or when the remedy pipe 46 is in use (YES in step S12), this process is performed without performing the drain 60 discharging process. Exit.

  Next, with reference to FIG. 6, the drain discharge process by the drain discharge device of the hot water supply / remedy device will be described. FIG. 6 is a flowchart showing the contents of the drain discharge process. The content of the drain discharge process shown in FIG. 6 is an example, and the present invention is not limited to this process content.

  The drain discharge process according to this embodiment is performed as the drain discharge timing when the water level in the drain tank 62 becomes equal to or higher than the water level sensor H106 and the remedy pipe 46 is not in use by steps S11 and S12 in FIG. Is called. In the drain discharge process, first, the switching valve 64 and the three-way valve 66 arranged on the memorial pipe 46 are switched to form a drain discharge path from the drain tank 62 to the drain pan 68 of the bathroom, and the like. 58 is closed. Thereafter, the circulation pump 54 is operated and the drain 60 is discharged. The drain 60 is continuously discharged until the water level in the drain tank 62 reaches a predetermined level, for example, below the water level sensor L108. When the water level in the drain tank 62 becomes less than the lower limit water level sensor L108, the driving of the circulation pump 54 is stopped.

  After the drainage treatment of the drain 60, the process proceeds to the cleaning process in the memorial pipe 46. First, the switching valve 64 is returned to a state where it can be chased, that is, a state where water can be passed from the bathtub 6 side to the circulation pump 54 side, and then the two-way valve 58 is closed, and hot water is supplied through the pouring line 38. Water is injected from the side. By this operation, the drain 60 remaining in the memorial pipeline 46 can be drained to the drain pan 68, and the memorial pipeline 46 can be cleaned. After washing, water injection is stopped, the three-way valve 66 of the three-way valve unit 116 is switched to flow from the heat exchanger 14 to the circulation fitting 48, the two-way valve 58 is switched to the open state, and the original normal operation is performed. Then, the drain 60 discharging process is terminated.

  The above process will be described with reference to FIG. 6. When the drain discharge process is started, the three-way valve 66 is switched to the discharge side (step S21). That is, the direction of the valve portion 127 of the three-way valve unit 116 (FIG. 2) is switched to the discharge side.

  Next, the switching valve 64 is switched to connect the remedy conduit 46 and the drain tank 62 so that the drain 60 can flow into the remedy conduit 46 side (step S22).

  Further, the two-way valve 58 disposed in the memorial pipeline 46 is closed (step S23).

  After the drain 60 discharge path is formed by the above processing, the circulation pump 54 is driven (step S24). The circulation pump 54 is continuously driven until the water level of the drain 60 in the drain tank 62 becomes less than the water level sensor L108. That is, it is determined whether or not the water level of the drain 60 is equal to or higher than the water level sensor L108 (step S25), and the circulation pump 54 is driven until it becomes equal to or lower than the water level sensor L108 (YES in step S25). When the inside of the drain tank 62 becomes less than the water level sensor L108 (NO in step S25), the circulation pump 54 is stopped (step S26).

  Subsequently, the process proceeds to a pipe cleaning process in the memorial pipe 46. The three-way valve 66 and the two-way valve 58 remain in the state of the drain discharge process, and the switching valve 64 is switched to a state in which the switching valve 64 can flow from the two-way valve 58 to the circulation pump 54 side (step S27). Next, hot water or water for washing is poured from the pouring pipe line 38 toward the memorial pipe line 46 (step S28). Since the two-way valve 58 is in a closed state, the hot water or water supplied here passes through the switching valve 64, the circulation pump 54, and the heat exchanger 14 for remedy, and in the forward pipe 462 of the remedy pipe 46. Through the three-way valve 66 side. At the discharge port of the three-way valve 66, a drain pipe 70 is provided to guide the drain 60 to the discharge side of the bathroom or the like, and the water and the drain 60 flow to the drain pan 68 side of the bathroom.

  With the above configuration, the drain 60 remaining in the circulation pump 54 and the memorial pipe 46 is discharged. The end of the cleaning is, for example, when clean water reaches the remedy conduit 46, until the flow rate reaches a predetermined amount by the pouring amount sensor 42, or the opening time of the pouring electromagnetic valve 40 is set by the timer 134. May be.

  As described above, when the predetermined cleaning time has elapsed, the two-way valve 58 is opened (step S29), the three-way valve 66 is switched, and the flow to the discharge side is switched to the bathtub 6 side (step S30). The drain 60 discharge process is terminated.

  According to such a configuration, regarding the drain processing of the drain 60 accumulated in the drain tank 62, the drain 60 can be drained using the follow-up conduit 46 and the circulation pump 54 and installed in front of the bathtub 6. Since the drain 60 can be discharged to the drain pan 68 or the like installed in the bathroom by the three-way valve 66, a separate drain discharge pipe or the like is unnecessary, and the apparatus can be reduced in size and cost. . In addition, although the existing piping is used, it is monitored that the memorial pipe 46 is not used, and the drain 60 is discharged, and the pipe cleaning processing by pouring is performed. It can prevent mixing in bathtub water BW. Further, on the return pipe 461 of the memorial pipe 46, a two-way valve 58 is arranged on the upstream side of the switching valve 64 that forms the drainage path of the drain 60, and between the two-way valve 58 and the three-way valve 66. Since the pouring pipe line 38 is disposed in the pipe 6, the drain 60 does not flow backward in the remedy pipe line 46 and is not mixed into the bathtub 6 when the drain 60 is discharged or the pipe is washed.

[Second Embodiment]

  FIG. 7 is referred with respect to the hot water supply / remembrance device according to the second embodiment of the present invention. FIG. 7 is a diagram illustrating a configuration of a hot water supply / remedy device according to the second embodiment. In addition, the same code | symbol is attached | subjected to 1st Embodiment and a common part, and the description is abbreviate | omitted. Moreover, the structure shown in FIG. 7 is an example, Comprising: This invention is not limited to this.

  In hot water supply / remedy apparatus 2 according to this embodiment, inflow of bathtub water BW from the bathtub 6 side on hot water supply / path 46 with respect to hot water supply / remedy apparatus 2 according to the first embodiment. The switch valve 64 for switching the connection between the drain tank 62 and the remedy pipe line 46 is connected to the upstream side of the pouring pipe line 38, while not having the two-way valve 58 to prevent. Further, the switching valve 64 switches the connection between the bathtub 6 and the circulation pump 54 and the connection between the drain tank 62 and the circulation pump 54 on the memorial pipe 46 and closes the memorial pipe 46. It is the structure provided with these three types of states.

  Even with such a configuration, the hot water supply / remembrance device 2 stores the drain 60 generated by heat exchange, as in the first embodiment, and when the predetermined drain discharge timing comes, the switching valve 64 and The three-way valve 66 is switched to form a drain discharge path using the memorial pipe 46.

  In addition, after the drain 60 is discharged, a portion that may come into contact with the bath water BW during normal operation is subjected to, for example, a cleaning process by pouring. However, in this embodiment, the switching valve 64 that guides the drain 60 from the drain tank 62 to the remedy conduit 46 is provided upstream of the pouring conduit 38 that performs pouring during the cleaning process. Therefore, in the pipe cleaning process, when the amount of pouring of hot water or the like is small or when the circulation speed by the circulation pump 54 is high, there is a possibility that a portion where the cleaning process becomes insufficient occurs.

  Therefore, in this embodiment, a part of the bathtub water BW is taken into the pipe cleaning process. That is, after the drain discharge process, when there is bathtub water BW in the bathtub 6, a part of the bathtub water BW is caused to flow into the remedy pipe 46, thereby the pipe line between the switching valve 64 and the pouring pipe line 38. The portion 144 can be washed with the bath water BW, and the drain 60 can be prevented from remaining in the remedy conduit 46.

  FIG. 8 is referred to for the drain discharge process according to the second embodiment including the pipe cleaning process as described above. FIG. 8 is a flowchart showing the contents of the drain discharge process according to the second embodiment. 8, the description of the same processing as in FIG. 6 is omitted. Moreover, the processing content and procedure shown in FIG. 8 are examples, and are not limited thereto.

  In the drain discharge process according to this embodiment, the three-way valve 66 and the switching valve 64 are switched to form a drain discharge path using a part of the memorial pipe 46, and the drain 60 is connected to a drain pan 68 in a bathroom or the like. Discharge. Thereafter, the process proceeds to a cleaning process for the drain 60 remaining in the memorial pipe 46. In the cleaning process, it is monitored whether or not there is bathtub water BW in the bathtub 6, and if there is bathtub water BW, cleaning is performed using the bathtub water BW. Further, when there is no bathtub water BW, the drain 60 remaining in the pipe portion 144 between the connecting portion of the pouring pipe line 38 and the switching valve 64 due to suction is removed from the connecting part of the pouring pipe line 38 on the three-way valve 66 side. Move to, and wash with hot water.

  In this embodiment, the flowchart of the main process and the flowchart of the drain tank management process are performed in the same manner as in the first embodiment.

  First, the three-way valve 66 is switched to the drain line 70 side (step S41), and the switching valve 64 is switched to connect the drain tank 62 and the memorial line 46 (step S42). Next, the circulation pump 54 is driven (step S43), and the drain 60 discharge process is started. When the water level of the drain 60 in the drain tank 62 becomes less than the water level sensor L108 (NO in step S44), the circulation pump 54 is stopped (step S45), and the drain discharge from the drain tank 62 is terminated. In this case, the condition for stopping the circulation pump 54 depends on the water level of the drain 60. However, the condition is not limited to this, and the predetermined time may be, for example, driven for the time required for discharging the drain 60 in the drain tank 62. Good.

  Next, in order to shift to the cleaning process of the memorial pipe 46 and the like, the switching valve 64 is switched, the connection between the memorial pipe 46 and the drain tank 62 is released, and the connection is switched to the bathtub 6 side (step S46). ).

  Here, as described above, when there is bathtub water BW in the bathtub 6, the circulation pump 54 is driven in order to wash the piping of the memorial pipeline 46 with the bathtub water BW (step S 47). In this case, when there is bathtub water BW, the bathtub water BW sucked up by the circulation pump 54 flows into the remedy pipe 46, and therefore it can be confirmed that the bathtub water BW is present by turning on the flowing water switch 56. (Step S48).

  As a result of detection by the flowing water switch 56, when the bathtub water BW is present in the bathtub 6 (YES in step S48), for example, a predetermined time T elapses as a time for the bathtub water BW to reach the three-way valve 66. The bath water BW is sucked up (step S49), and when a predetermined time has elapsed (YES in step S49), the circulation pump 54 is stopped (step S50). Thereafter, the outlet of the three-way valve 66 is switched from the discharge side to the bathtub 6 side (step S51).

  If there is no bathtub water BW in the bathtub 6 as a result of detection by the flowing water switch 56 (NO in step S48), the circulation pump 54 is stopped (step S52). In this case, the drain 60 remaining in the pipe part 144 between the connecting part of the pouring pipe line 38 and the switching valve 64 is discharged to the three-way valve 66 side. Next, in order to prevent the drain 60 remaining in the memorial pipe 46 from flowing back through the return pipe 461 of the memorial duct 46 and flowing into the bathtub 6 side, the switching valve 64 is switched to a closed state (step) S53). Then, the pouring solenoid valve 40 is opened, and hot water or water is poured from the pouring pipe line 38 (step S54). In this case, since the switching valve 64 is closed, the hot water or water flowing in the memorial pipe 46 flows into the circulation pump 54, the heat exchanger 14, and the three-way valve 66 and remains in the memorial pipe 46. The drain 60 is washed away and discharged from the three-way valve 66.

  The end timing of the cleaning process may be set, for example, to a time that allows water to flow from the inside of the memorial conduit 46 to the three-way valve 66 side, and that a predetermined flow rate has flowed by the pouring amount sensor 42. It may be detected. Further, the opening time of the pouring solenoid valve 40 may be set to a predetermined time and counted by the timer 134 or the like. When it is time to end the cleaning process, the pouring solenoid valve 40 is closed. Further, the closed state of the switching valve 64 is released, and the remedy conduit 46 is switched to a state in which water can be passed between the bathtub 6 and the circulation pump 54 (step S55), and the discharge port of the three-way valve 66 in step S51. Is switched to the bathtub 6 side to finish.

  With such a configuration, the drain 60 that has accumulated in the drain tank 62 can be discharged using the remedy conduit 46 or the circulation pump 54, and the three ways installed in front of the bathtub 6. Since the drain 66 can be discharged to the drain pan 68 or the like installed in the bathroom by the valve 66, there is no need for a separate drain discharge pipe or the like, and the device can be reduced in size and cost. In addition, since it is monitored that the memorial pipe 46 is not used, the drain 60 is discharged, and the pipe cleaning process by pouring is performed, so that the drain 60 can be prevented from being mixed into the bathtub 6. . Further, the drain 60 can be discharged without separately installing a two-way valve in the memorial pipe 46. In addition, since pipe cleaning can be performed, the equipment can be simplified and the valve switching control can be simplified. Further, the installation process can be simplified and the cost can be reduced.

  [Other Embodiments]

  (1) In the above embodiment, the three-way valve unit 116 having the three-way valve 66 is installed in front of the circulation fitting 48 in the bathroom to switch between the bathtub 6 side and the discharge side to the drain pan 68 or the like. However, the present invention is not limited to this, and as shown in FIG. 9, a three-way valve unit 200 integrated with a circulation fitting 48 that connects the remedy conduit 46 and the bathtub 6 may be used. In this case, for example, a return pipe 461 of the memorial conduit 46 is formed on the lower side of the three-way valve unit 200, and an outgoing pipe 462 is formed on the upper side. In the three-way valve unit 200, the flow is transferred to the bathtub 6 side according to the bath water BW chased on the hot water supply / memoriing device 2 side or the drain 60 drained in the middle of the forward pipe 462. And the valve part 202 which switches to the drain pipe line 70 side is comprised.

  With such a configuration, by switching the valve unit 202 in accordance with the drain 60 discharge control, the drain 60 can be prevented from being mixed into the bathtub 6 and the above-mentioned object can be achieved. By integrating with the circulation metal fitting 48, it is possible to further reduce the space and to omit the installation process.

  (2) In the above embodiment, in the drain tank management process of FIG. 5, the drain 60 is not discharged when the remedy conduit 46 is in use (step S12). When the water level in the tank 62 greatly exceeds the water level sensor H106, the process may be forcibly shifted to the discharge process. For example, the automatic hot water filling or the chasing operation to the bathtub 6 is temporarily suspended, The discharge process may be started. Then, when the drain 60 discharging process is completed, the interrupted chasing process or pouring process may be resumed. Even with such a configuration, the object of the present invention can be achieved.

  (3) In the above embodiment, in the drain discharge process from the drain tank 62, the condition for stopping the circulation pump 54 is determined based on the water level of the drain 60 in the drain tank 62. For example, the set predetermined time may be driven according to the time required for discharging the drain 60 in the drain tank 62. According to such a configuration, for example, it is possible to perform a systematic discharge process such as discharging the drain 60 in a time period in which it is possible to periodically secure the time required for drain discharge. It is possible to prevent the use timing of the dredge apparatus 2 from overlapping. In addition, the time required for discharging the drain 60 and the water level sensors 106 and 108 in the drain tank 62 may be used in combination. For example, when the water level does not decrease even after a predetermined time elapses, You may make it detect the abnormality of a drain discharge means.

  (4) In the above embodiment, in the pipe cleaning process, when there is bathtub water BW in the bathtub 6, the pipe cleaning is performed using the bathtub water BW. The bath water BW may be sucked before performing, and then hot water or water may be poured from the pouring pipe line 38. Such a configuration can also achieve the above object.

  (5) In the above embodiment, when priority is given to discharging the drain 60 as described above when the water level of the drain 60 in the drain tank 62 greatly exceeds the water level sensor H106, the remote control devices 112, 114 Notification processing may be performed using the sound notification unit 142 or the display unit 140 installed in the computer.

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 the discharge of drain generated by heat exchange, and in particular, using an additional means for bath water, branching in front of the bathtub, and draining the drain to the drain means in the bathroom, It is possible to discharge the drain to the outside of the equipment by using the pipe line, eliminating the need for a drain-dedicated piping, and reducing the size and cost of the equipment. In addition, because the cleaning process of the memorial pipeline is performed in accordance with the draining process, it is possible to prevent the drain remaining in the memorial pipe from mixing into the bath water in the memorial process after the draining process. It is.

It is a figure which shows an example of the hot-water supply / remedy apparatus which concerns on 1st Embodiment. It is a figure which shows an example of the 3 way valve unit which concerns on 1st Embodiment. It is a block diagram which shows the control apparatus and remote control device of a hot-water supply / remedy apparatus. It is a flowchart which shows the main process of a hot water supply / remedy apparatus. It is a flowchart which shows the management process of a drain tank. It is a flowchart which shows a drain discharge process. It is a figure which shows the structure of the hot-water supply / remedy apparatus which concerns on 2nd Embodiment. It is a flowchart which shows the drain discharge process which concerns on 2nd Embodiment. It is a figure which shows the three-way valve unit which concerns on other embodiment.

Explanation of symbols

2 Hot water supply / replacement device 4 Hot water supply combustion chamber 6 Bath 8 Remembrance combustion chamber 10 Primary heat exchanger 12 Secondary heat exchanger 14 Heat exchanger for reheating 24 Hot water supply line 38 Hot water supply line 40 Hot water electromagnetic Valve 42 Molten water sensor 46 Remaining pipe 461 Return pipe 462 Outgoing pipe 48 Circulation fitting 52 Water level sensor 54 Circulation pump 56 Flowing water switch 58 Two-way valve 60 Drain 62 Drain tank 64 Switching valve (first switching means)
66 3-way valve (second switching means)
68 Drain pan 70 Drain pipe 94 Drain receiver 96 Drain pipe 98 Neutralizer 104 Drain outlet 106 Water level sensor H
108 Water level sensor L
110 Control Device 116 Three-way Valve Unit 118 Connection Port (Inlet)
120 connection port (tub side)
122 Connection port (drain side)
126 Control part 127 Valve part 136 Control part (remote control)
140 Display Unit 142 Sound Notification Unit 144 Pipe Portion 200 Three-way Valve Unit (Modification)
202 Valve

Claims (12)

A drainage device for a hot water supply / remaining device having a heat exchanger for exchanging heat from the combustion exhaust and having a hot water supply function and a bathtub replenishment function
Drain recovery means for recovering the drain generated by heat exchange of the heat exchanger and guiding it to the side of the memorial pipeline;
First switching means for switching the connection between the memorial pipeline and the bathtub side or the drain collecting means side;
A second switching means installed on the downstream side of the first switching means of the memorial pipeline, and for switching the connection of the memorial pipeline to the bathtub side or the drainage side;
Control means for switching the first switching means and / or the second switching means, and flowing the drain to the drainage side through the memorial conduit;
A drain discharge device comprising:
The drain discharge device according to claim 1,
The drain collecting means, a drain tank for storing the drain until a predetermined discharge timing;
A water level sensor for detecting the water level of the drain accumulated in the drain tank;
With
When the water level of the drain in the drain tank reaches a predetermined value based on the detection result of the water level sensor, the control means stops bath water replenishment processing and / or pouring operation to the bathtub side. The drain discharge device is characterized in that it is shifted to a drain discharge process.
The drain discharge device according to claim 1,
Comprising water flow detection means for detecting the flow of bathtub water in the memorial pipe,
The control means does not shift to the drain discharge process when the bath water flows in the tracking pipe line according to the detection result of the flowing water detection means.
The drain discharge device according to claim 1,
A cleaning means for injecting water into the memorial pipe and cleaning it,
The control means switches the first switching means after completion of the drain discharge process and shifts to a pipe cleaning process.
The drain discharge device according to claim 4,
A drain discharge device comprising an inflow prevention valve that is installed upstream of the first switching means on the memorial pipe and prevents bath water from flowing into the memorial pipe.
The drain discharge device according to claim 4,
An inflow prevention valve for preventing the inflow of bath water into the memorial pipeline,
A water injection pipe for pouring hot water or water into the memorial pipe,
When the cleaning timing is reached, the first switching means is switched, the inflow prevention valve is closed, and hot water or water is poured from the water injection pipe to the remedy pipe. A drain discharge device characterized by performing a cleaning process.
The drain discharge device according to claim 4,
The draining device according to claim 1, wherein the control means takes in the bathtub water in the bathtub into the memorial pipe when the pipe cleaning timing comes.
The drain discharge device according to claim 1,
The second switching means is configured to take in the bathtub water from the bathtub and flow it to the forward pipe side of the memorial pipe line, guide the bathtub water from the return pipe side of the memorial pipe line, and flow it to the bathtub side A drain discharge device characterized by the above.
A drainage method for a hot water supply / recovery device comprising a heat exchanger for exchanging heat of combustion exhaust, and having a hot water supply function and a bathtub replenishment function
Recovering the drain generated by heat exchange by the heat exchanger;
Guiding the recovered drain to the memorial pipeline side;
Switching the connection between the memorial pipeline and the bathtub side or the drain collecting means side with a first switching means;
A step of switching the connection between the follow-up pipeline and the drainage side by a second switching means when discharging the drain; and
Switching the first switching means and / or the second switching means, and allowing the drain to flow to the drain side through the memorial conduit;
A drain discharge method comprising:
The drain discharge method according to claim 9,
Detecting a flow of bath water in the memorial pipeline,
The drain discharge method according to claim 1, wherein when the bathtub water is flowing in the follow-up pipe line according to the detection result of the flowing water, the drain discharge process is not performed.
The drain discharge method according to claim 9, wherein
Storing the drain in a drain tank until a predetermined discharge timing;
Detecting the water level of the drain stored in the drain tank;
When the water level of the drain in the drain tank reaches a predetermined value according to the water level detection result, the bath water replenishment operation and / or the pouring operation to the bathtub side is stopped, and the first switching means And / or switching the second switching means;
A drain discharge method comprising:
The drain discharge method according to claim 9, wherein
When the cleaning timing is reached, switching the first switching means;
Closing the inflow prevention valve to prevent the bath water from flowing into the memorial line;
Water is poured into the remedy pipeline from the irrigation pipeline to wash the inside of the remedy pipeline; and
A drain discharge method comprising:

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