JP5566242B2 - Hot water bath equipment - Google Patents

Description

  The present invention relates to a hot water bath apparatus having a function of supplying hot water created by heating water to flow or filling a bathtub.

  FIG. 2 shows a system configuration of a hot water bath apparatus being developed by the present applicant. In the figure, a hot water supply heat exchanger and a reheating heat exchanger 12 are arranged in the combustion chamber 2 of the combustion appliance 1. The hot water supply heat exchanger includes a main heat exchanger 3 and a latent heat exchanger 4. One or more (three in the figure) hot water supply burners 5 are disposed below the main heat exchanger 3, and a reheating burner 13 is disposed below the reheating heat exchanger 12.

  Each of the hot water supply burner 5 and the reheating burner 13 is connected to the branch gas pipe 8, and each branch gas pipe 8 is integrated with the main gas pipe 7. Each branch gas pipe 8 is provided with a gas valve 11, and the main gas pipe 7 is provided with an original gas valve 9 and a proportional valve 10. The proportional valve 10 adjusts the amount of gas supplied to the hot water supply burner 5 and the reheating burner 13 by the valve opening amount, and the valve opening amount is controlled by a control device. A combustion fan 6 provided on the lower side of the combustion chamber 2 supplies air for supply and exhaust to the hot water supply burner 5 and the reheating burner 13 by rotating the fan. The fan speed is controlled by a control device. The control device controls the fan rotational speed of the combustion fan 6 so as to supply the air volume matched to the combustion amount of the burners 5 and 13 to the corresponding burners 5 and 13.

  The latent heat exchanger 4 is disposed above the main heat exchanger 3 (downstream of the flow of combustion gas). A water supply pipe 14 is connected to a water inlet of the latent heat exchanger 4, an outlet of the latent heat exchanger 4 is connected to a water inlet of the main heat exchanger 3, and a hot water pipe 15 is connected to the outlet of the main heat exchanger 3. Is connected. The main heat exchanger 3 absorbs the sensible heat of the combustion gas by the hot water supply burner 5, and the latent heat exchanger 4 mainly absorbs the latent heat of the combustion gas and heats the water supplied from the water supply pipe 14 to set the temperature ( Hot water at a set temperature of hot water supply set by a remote controller or the like is created, and the hot water is supplied to a request destination of hot water through the hot water supply pipe 15.

  A drain receiver 16 that receives the drain generated during the recovery of the latent heat of the combustion gas is disposed on the lower side of the latent heat exchanger 4. The drain received by the drain receiver 16 enters the neutralizer 18 through the drain pipe 17. . The neutralizer 18 is filled with a neutralizing agent such as calcium carbonate, and neutralized drain water having acidity. This neutralized drain water is stored in the lower drain tank 19.

  One end of a conduit 29 is connected to the water inlet of the reheating heat exchanger 12, and the other end of the conduit 29 is connected to the pump outlet 26 of the circulation pump 47. The outlet of the reheating heat exchanger 12 is connected to one end side of the outgoing pipe 30, and the other end side of the outgoing pipe 30 is connected to the bathtub 32 via the adapter 31. The outgoing pipe 30 is provided with a third switching valve 35 serving as a circulation / drainage switching valve having three pipe connections, and the third switching valve 35 is provided on the reheating heat exchanger 12 side. The flowing water flowing through the outgoing pipe 30 (for example, the crosslinked polyethylene pipe 10A) is selectively switched to one side of the passage to the bathtub 32 (for example, the crosslinked polyethylene pipe 10A) and the passage to the drainage passage 48. The passage 48 is arranged in the bathroom by changing the pipe diameter with the outgoing pipe 30 and the return pipe 28 like the cross-linked polyethylene pipe 7A, for example, and the flowing water discharged from the drainage passage 48 enters the drainage outlet of the bathroom washroom, It is configured to drain to the outside.

  That is, a mounting port (flowing (in)) for receiving the flowing water flowing through the outgoing pipe 30, a mounting port (flowing (out)) for mounting a pipe serving as a passage to the bathtub 32 side, and a drainage passage 48 are mounted. The attachment port (drain drainage) is provided in the third switching valve 35 (see FIG. 3). In addition, the amount of water that is drained or washed so that the drained drain does not remain in the pipe is limited by the flow rate, and the sound of the flowing water (drainage sound) is reduced. It can be made smaller than other pipes. In the example of FIG. 2, the third switching valve 35 is configured as a drain / drainage switching unit 36 in the form of a unit as shown in FIG. 3 and is incorporated in the outgoing pipe 30.

  The pump suction port 25 of the circulation pump 47 is connected to a return pipe 28 (for example, a cross-linked polyethylene pipe 10A) via a second switching valve 34 serving as a hot water / water injection flow path switching valve. The pipe 28, the branch path 28b on one side of the branch paths 28a, 28b of the return pipe 28, the circulation pump 47, the pipe 29, the reheating heat exchanger 12, the forward pipe 30, and the third switching valve 35 are sequentially arranged. The passage that returns to the bathtub 32 forms a recirculation circulation passage 27.

  One end side of the hot water / water supply passage 20 is connected to the hot water supply pipe 15, and the other end side of the hot water / water supply passage 20 is connected to the first switching valve 33 via a hot water / water injection electromagnetic valve 44. . The first switching valve 33 is connected to the outlet of the drain tank discharge passage 23 and the inlet side of the pump communication passage 24, and the inlet side of the drain tank discharge passage 23 is connected to the bottom of the drain tank 19 via the check valve 22. It is connected in communication. The outlet of the pump communication passage 24 is connected to the second switching valve 34. The first switching valve 33 selectively switches one side of the hot water / water supply passage 20 and the drain tank discharge passage 23 to the pump communication passage 24. When the hot water / water supply passage 20 is in communication with the pump communication passage 24 by the first switching valve 33, the pump communication passage 24 functions as the hot water / water supply passage 20. When the drain tank discharge passage 23 is in communication with the pump communication passage 24, the pump communication passage 24 functions as the drain tank discharge passage 23.

  Further, the second switching valve 34 functions as a four-way valve, and connects the branch passage 28b of the return pipe 28 to the pump suction port 25 of the circulation pump 47 and the pump communication passage 24 through the pump suction of the circulation pump 47. The operation of connecting to the opening 25 and the operation of connecting the branch passage 28b of the return pipe 28 to the pump suction port 25 of the circulation pump 47 and connecting the branch passage 28a of the return pipe 28 to the pump communication passage 24 are controlled. This is selectively performed according to a command from the apparatus.

  Each of the first switching valve 33, the second switching valve 34, and the third switching valve 35 includes a motor, and is configured to switch a passage (flow path) by driving the motor. Since such a valve that switches the passage (flow path) by driving the motor is well known, a specific configuration of this valve and description of its operation are omitted.

  In FIG. 2, 37 is a thermistor that detects hot water temperature, 38 is a water amount sensor, 39 is a bypass passage, 40 is a water amount servo that adjusts the flow rate of flowing water, and 41 is a bypass servo that adjusts the amount of water supplied to the bypass passage 39. , 42 is an air release valve, 43 is a check valve, 49 is a drain pipe for discharging overflow water from the drain tank 19 and water coming out of the air release valve 42, and 21 is stored in the drain tank 19. A plurality of water level electrodes for detecting the water level of the drain water are shown.

  In this hot water bath apparatus, each operation operation of the hot water supply operation, reheating operation, hot water filling operation, drain drain operation, and drain cleaning operation is controlled by the control device. An example will be briefly described.

  The hot water supply operation starts when a hot water tap (not shown) or the like provided at the end of the hot water supply pipe 15 is opened. When the hot water tap is opened, water is introduced into the water supply pipe 14. When the flow rate flowing through the water supply pipe 14 is detected by the water amount sensor 38 and reaches the operating flow rate or more, the gas valve 11 of the branch gas pipe 8 leading to the hot water supply burner 5 is opened and the fan of the combustion fan 6 is rotated. The number of hot water supply burners 5 selected according to the required amount of combustion is burned, and the water passing through the latent heat exchanger 4 and the main heat exchanger 3 is heated to produce hot water. It is supplied to the open hot water tap and discharged.

  The chasing operation is performed when the chasing operation is instructed by the remote controller, or when the temperature of the bath water in the appliance having the heat retaining function falls below an allowable range from the set temperature. In this reheating operation, the branch passage 28 b of the return pipe 28 is communicated with the pump suction port 25 of the circulation pump 47 by the second switching valve 34, and the third switching valve 35 performs the third switching from the reheating heat exchanger 12. The operation is performed by driving the circulation pump 47 in a state where the passage 30b of the outgoing pipe 30 to the valve 35 is in communication with the passage portion 30a extending from the third switching valve 35 to the bathtub 32. When the circulation pump 47 is driven, hot water in the bathtub 32 circulates through the recirculation circulation passage 27, and rotation of the combustion fan 6 and combustion of the reheating burner 13 are started when the circulating water is detected by the flowing water switch 45. When the circulating water passes through the reheating heat exchanger 12, it is heated by the combustion heat of the reheating burner 13, and the temperature of the bathtub hot water rises. The operation of the circulation pump 47 is stopped when the temperature of the bath water detected by the thermistor 37 provided in the recirculation circulation passage 27 reaches the set temperature of the bath set by the remote controller, and the combustion of the reheating burner 13 is stopped. Then, the rotation of the combustion fan 6 is stopped and the chasing operation is finished. That is, bath water flows through the return pipe 28, the passage 30b of the outgoing pipe 30, and the passage portion 30a of the outgoing pipe 30.

  The hot water operation starts when a hot water operation (automatic operation) is commanded by a remote controller or the like. When a hot water filling operation (automatic operation) is commanded, the operation of communicating the hot water / water supply passage 20 to the pump communication passage 24 by the first switching valve 33 and the branching of the return pipe 28 by the second switching valve 34 are performed. The passage 28b communicates with the pump suction port 25 of the circulation pump 47, the branch passage 28a of the return pipe 28 communicates with the pump communication passage 24, and the third switching valve 35 reheats the outgoing pipe 30 for heat exchange. The passage portion 30b from the vessel 12 to the third switching valve 35 is communicated with the passage portion 30a from the third switching valve 35 of the outgoing pipe 30 to the bathtub 32, and in the switching state of this flow path, The hot water / water injection solenoid valve 44 is opened.

  Then, when water is introduced from the water supply pipe 14 to the hot water supply heat exchanger (the latent heat exchanger 4 and the main heat exchanger 3), it operates in the same manner as the operation of the hot water supply operation, and the hot water supply heat exchanger operates. Hot water having a tension setting temperature is created, and the hot water is supplied from the main heat exchanger 3 to the hot water supply pipe 15, the hot water / water supply passage 20, the first switching valve 33, the pump communication passage 24, and the second switching valve 34. It flows in order. The hot water supplied from the pump communication passage 24 to the second switching valve 34 flows through the branch passage 28a and the return pipe 28 to the bathtub 32 in order, the branch passage 28a, the branch passage 28b, and the pump suction port. 25, the flow through the circulation pump 47, the pump discharge port 26, the pipe 29, the reheating heat exchanger 12, the forward pipe 30 (30b), the third switching valve 35, and the forward pipe 30 (30a) to the bathtub 32 in this order. The water level of the hot water in the bathtub 32 rises as time passes. Then, when the bathtub water level detected by the water pressure by the water level sensor 46 reaches the hot water filling set water level set by the remote controller, the hot water filling / water pouring electromagnetic valve 44 is closed, and the hot water filling operation is finished.

  That is, by using two of the return pipe 28 and the outgoing pipe 30 (including the passage 30b and the passage portion 30a) and flowing hot water into the bathtub at the same time, there is little pressure loss and hot water filling can be done quickly. Also, when the operation of lowering the temperature of the bath water is performed by operating the remote control device (for example, when the “Nuruyu” switch of the remote control device is operated), the hot water solenoid valve is opened and heating is performed from the hot water supply circuit side. The operation of the additional water function of pouring water that has not been made into the bathtub 32 by a predetermined amount, for example, is controlled. Also at this time, using the two return pipes 28 and the outgoing pipe 30, water can be poured into the bathtub at the same time, and the hot water temperature can be quickly lowered.

  In addition, in the appliance which has the function to perform a heat retention operation | movement and a water retention operation | movement after hot water filling is completed, it transfers to those operation modes after hot water filling. Even during the heat retaining operation and the water retaining operation at this time, hot water flows through the return pipe 28 and the outgoing pipe 30.

  The drain drain operation starts when a predetermined drain drain start condition is satisfied (for example, when the drain water level in the drain tank 19 reaches a predetermined drain level by the water level electrode 21). . At the start of the operation, the pump communication passage 24 is connected to the pump suction port 25 of the circulation pump 47 by the second switching valve 34, and then the reheating heat exchanger 12 is switched from the reheating heat exchanger 12 by the third switching valve 35. In the state where the passage of the outgoing pipe 30b to the third switching valve 35 is connected to the drainage passage 48, and then the drain tank discharge passage 23 is connected to the pump communication passage 24 by the first switching valve 33. The pump 47 is driven.

  By driving the circulation pump 47, the drain water in the drain tank 19 is discharged into the drain tank discharge path 23, the pump suction port 25, the circulation pump 47, the pump discharge port 26, the pipe line 29, the reheating heat exchanger 12, the forward pipe 30b, The water is discharged from the drainage passage 48 to the bathroom (specifically, the bathroom washroom) through the third switching valve 35 in order.

  Then, when the predetermined drainage end condition is reached (for example, when the drain water level in the drain tank 19 reaches a predetermined drainage end level), the driving of the circulation pump 47 is stopped, End drainage operation.

  The drain cleaning operation is for cleaning the drain water adhering to the passage by the drain draining operation, and is performed after the drain draining operation. When the drain cleaning operation is started, the pump communication passage 24 is operated by the first switching valve 33. Is connected to the hot water / water supply passage 20 and then the hot water / water injection solenoid valve 44 is opened. At this time, the second switching valve 34 and the third switching valve 35 are in the drain drain operation switching position, and the outgoing pipe 30 b is in communication with the drain passage 48.

  By opening the pouring / water pouring solenoid valve 44, the feed water enters the hot water supply heat exchanger (latent heat heat exchanger 4 and main heat exchanger 3) from the water supply pipe 14, and the hot water burner 5 burns in the same manner as in the hot water supply operation. And hot water is produced by the hot water supply heat exchanger. This hot water is supplied from the hot water supply pipe 15 to the hot water / water supply passage 20, the first switching valve 33, the pump communication passage 24, the circulation pump 47, the reheating heat exchanger 12, the outgoing pipe 30 b, and the third switching valve 35. The water is drained from the drainage passage 48 into the bathroom in order. When the water injection amount reaches a predetermined set flow rate, or when the cleaning end condition is satisfied, such as when the water injection time reaches a predetermined time, the hot water injection / water injection electromagnetic valve 44 is closed, The drain cleaning operation by pouring is completed. If the drain cleaning operation is performed in the same manner without burning the hot water supply burner 5, the drain cleaning operation is performed with unheated water.

  Further, the drain cleaning operation is performed by setting the hot water produced by the hot water supply heat exchanger to, for example, 9 liters / minute by the control of the water amount control valve, and pouring water into the bathtub 14 or the flow rate at the time of water injection (for example, 24 liters / minute). Reduce and pour a total of 6 liters of water. By doing in this way, the sound (drainage sound) of the water which flows at the time of drain washing can be made small. That is, since the flow rate is reduced in order to reduce the drainage noise including the drain drainage operation, the drain drainage operation or the drain cleaning operation can be provided by using either the return pipe 28 or the forward pipe 30.

  At the end of this drain cleaning operation, the forward pipe 30b is connected to the forward pipe 30a by the third switching valve 35, and the branch passage 28b is connected to the pump suction port 25 by the second switching valve 34. The second switching valve 34 and the third switching valve 35 switch the passage to the reheating operation position that is a fixed position.

JP 2009-228963 A Utility Model Registration No. 2525004

  In the hot water bath apparatus shown in FIG. 2, the main heat exchanger 3, the latent heat exchanger 4, the hot water burner 5, the reheating burner 13, the pouring / water pouring electromagnetic valve 44, the circulation pump 47, and the first switching valve 33. The devices such as the second switching valve 34 and the circulation pump 47 are accommodated in a case (not shown), and the hot water supply pipe 15, the water supply pipe 14, the main gas pipe 7, the drain pipe 49, the return pipe from the case. 28, the outer pipes around the water and the gas pipes such as the outgoing pipe 30 are connected to the corresponding pipes in the case and led out to the outside.

  As shown in FIG. 2, when performing the work of installing the drain / drainage switching unit 36 in the forward pipe 30, the forward pipe 30 and the return pipe 28 of the recirculation circulation passage 27 led out from the case are distinguished and recognized. In addition, it is necessary to correctly install the drain / drainage switching unit 36 in the outgoing pipe 30.

  When the combustion appliance 1 is newly installed in a newly built condominium or the like, two pipes corresponding to the outgoing pipe 30 and the return pipe 28 of the recirculation circulation passage 27 communicating with the reheating heat exchanger 12 are connected on the case side. However, it is difficult to distinguish which of the two pipes is the outgoing pipe 30 at a work position away from the case of the apparatus of the combustion appliance 1.

  In this case, it may be possible to preliminarily add colorings or symbols for distinguishing the return pipe 28 and the forward pipe 30 to the pipe connection positions on the case side and the positions of both ends of the two pipes (tubes) (Patent Document). (See 1) Originally, the two pipes are not designed separately for return pipes and forward pipes, and either pipe may be connected to the connection position of the forward and return pipes on the case side. If the connection position of the pipe is identified with the coloring or sign, it is forced to connect the pipe with the sign on the pipe side and the case side according to the identification mark. , Work efficiency of piping connection will deteriorate.

  In addition, the distance from the case of the device of the combustion appliance 1 to the bathtub 32 varies depending on the installation location of the combustion appliance 1, the difference in the building structure, etc., and many types of pipes with different lengths (identified at both ends). It is uneconomical to pre-manufacture and carry out inventory management of pipes with signs and colors. In order to carry out piping work easily even if the length of the laying pipe differs depending on the installation location of the combustion appliance 1, usually the same pipe is used for the outgoing pipe and the return pipe, and the combustion appliance 1 side (case side) is used. It is common to take a construction form that cuts the connected piping at the required length position and connects it to the bathtub side, and the method of performing identification in order to prevent erroneous connection at both ends of the piping in advance is such construction Not suitable for form.

  In particular, when the drain drainage switching unit 36 is optionally installed in the piping of an existing bath hot water system in which the drain drainage switching unit 36 is not provided, the midway position of the existing piping is cut to drain the drainage switching unit 36. Therefore, it is difficult to determine which of the two pipes that are piped is the outgoing pipe, and there is a problem of erroneous connection such that the drain drainage switching unit 36 is interposed on the return pipe side. It tends to occur.

  In addition, when the adapter 31 provided in the bathtub 32 is of a nonpolar circulation type (see Patent Document 2), even if the connection of two pipes connected to the adapter 31 is switched, the recirculation operation is normally performed. Therefore, it is particularly difficult to distinguish which of the two pipes is on the outgoing pipe side from the appearance of the laying state, and an erroneous connection that the drain drainage switching unit 36 is interposed on the return pipe side ( (Incorrect installation) is more likely to occur.

  The present invention has been made to solve the above-described problems, and its purpose is to provide a drain drainage switching unit (the third switching valve 35 in FIG. 2) without performing identification for erroneous connection to the piping. It is an object of the present invention to provide a hot water bath apparatus that makes it easy to correctly install and install it in the outgoing pipe of a circulation passage.

  In order to achieve the above object, the present invention has the following configuration as means for solving the above-mentioned problems. That is, the first invention is a main heat exchanger that absorbs the sensible heat of the combustion gas of the burner, and a latent heat that is disposed downstream of the main heat exchanger in the flow of the combustion gas and absorbs the latent heat of the combustion gas. A hot water supply heat exchanger configured to have a heat exchanger, heating hot water passing through the latent heat exchanger to the main heat exchanger in order to create hot water, and supplying the hot water to a hot water supply destination through a hot water supply pipe Then, the bathtub water is led to the pump suction port of the circulation pump through the return pipe, and the bathtub water delivered from the pump discharge port of the circulation pump is re-heated through the heat exchanger and from the reheating heat exchanger to the outbound pipe. A recirculation circulation passage returning to the bathtub, a hot water / water supply passage formed by connecting a hot water supply pipe of the hot water heat exchanger and the recirculation circulation passage via a pouring / water pouring solenoid valve, and the hot water / water supply Provided at the connection between the passage and the recirculation passage A hot water / water injection flow path switching valve for selectively switching the hot water or water supplied through the hot water / water supply passage to the water passing through both the outward pipe and the return pipe and the water passing through only the outgoing pipe; A drainage passage that is connected to the outgoing pipe, and a passage that is part of the outgoing pipe that is provided in the communication connection portion between the drainage passage and the outgoing pipe and extends from the reheating heat exchanger to the communication connection portion of the drainage passage. A circulation / drainage channel switching valve that selectively switches to one side of the drainage channel and the remaining part of the outgoing pipe from the communication connection part of the drainage channel to the bathtub, and drain water generated in the latent heat exchanger In the drain water draining operation for draining drain water in the drain tank, the drain pump in the drain tank is driven to drive the drain water in the drain tank through the circulation pump. The circulation through the exchanger and the outgoing pipe in order A hot water bath apparatus that discharges from the drain flow path switching valve to the outside through the drain passage, and the control device that controls the operation of the hot water bath apparatus controls the pipe check operation mode for distinguishing between the outgoing pipe and the return pipe In response to the pipe check command, the control unit for the pipe check operation mode opens the pouring / water pouring solenoid valve and passes the pouring / water pouring flow path switching valve only to the outgoing pipe. It has a control structure that performs an operation of switching to water and supplies hot water or non-heated water from the hot water supply pipe to the hot water / water supply passage.

  The second invention is a main heat exchanger that absorbs the sensible heat of the combustion gas of the burner and a latent heat that is disposed downstream of the main heat exchanger in the flow of the combustion gas and absorbs the latent heat of the combustion gas. A hot water supply heat exchanger configured to have a heat exchanger, heating hot water passing through the latent heat exchanger to the main heat exchanger in order to create hot water, and supplying the hot water to a hot water supply destination through a hot water supply pipe Then, the bathtub water is led to the pump suction port of the circulation pump through the return pipe, and the bathtub water delivered from the pump discharge port of the circulation pump is re-heated through the heat exchanger and from the reheating heat exchanger to the outbound pipe. A recirculation circulation passage returning to the bathtub, a hot water / water supply passage formed by connecting a hot water supply pipe of the hot water heat exchanger and the recirculation circulation passage via a pouring / water pouring solenoid valve, and the hot water / water supply Provided at the connection between the passage and the recirculation circulation passage. A hot water / water injection flow path switching valve that selectively switches hot water or water supplied through the hot water / water supply passage to water passing through both the outgoing pipe and the return pipe and through only the outgoing pipe; A drainage passage that is connected to the pipe, and a part of the forward pipe that is provided in the communication connection portion between the drainage passage and the outgoing pipe and extends from the reheating heat exchanger to the communication connection portion of the drainage passage. A recirculation / drainage switching valve that selectively switches to one side of the drainage passage and the remaining part of the outgoing pipe from the communication connection to the bathtub, and drain water generated by the latent heat exchanger is stored. In the drain water draining operation for draining drain water in the drain tank, the drain pump in the drain tank is driven to drive the drain water in the drain tank through the circulation pump to the reheating heat exchanger. , Circulate and discharge through the outgoing pipe in order. A hot water bath apparatus that discharges from a flow path switching valve to the outside through the drainage passage, and a control device that controls the operation of the hot water bath apparatus is connected to the circulation / drainage flow path switching valve and the bathtub of the outgoing pipe and the return pipe. A controller for a pipe connection check operation mode for inspecting an erroneous connection in a state where residual water that can be circulated through the recirculation circulation passage is present in the bathtub; The control unit receives the pipe connection check command, and has a control configuration for driving the circulation pump after switching the circulation / drainage switching valve to the drainage passage side. ing.

  Furthermore, the third invention is a main heat exchanger that absorbs the sensible heat of the combustion gas of the burner, and a latent heat that is disposed downstream of the main heat exchanger in the flow of the combustion gas and absorbs the latent heat of the combustion gas. A hot water supply heat exchanger configured to have a heat exchanger, heating hot water passing through the latent heat exchanger to the main heat exchanger in order to create hot water, and supplying the hot water to a hot water supply destination through a hot water supply pipe Then, the bathtub water is led to the pump suction port of the circulation pump through the return pipe, and the bathtub water delivered from the pump discharge port of the circulation pump is re-heated through the heat exchanger and from the reheating heat exchanger to the outbound pipe. A recirculation circulation passage returning to the bathtub, a hot water / water supply passage formed by connecting a hot water supply pipe of the hot water heat exchanger and the recirculation circulation passage via a pouring / water pouring solenoid valve, and the hot water / water supply Provided at the connection between the passage and the recirculation passage A hot water / water injection flow path switching valve that selectively switches hot water or water supplied through the hot water / water supply passage to water passing through both the outward pipe and the return pipe and through only the outgoing pipe; A drainage passage connected in communication with the outgoing pipe, and a portion of the outgoing pipe that is provided in a communication connection portion between the drainage passage and the outgoing pipe from the reheating heat exchanger to the communication connection portion of the drainage passage. A circulation / drainage switching valve that selectively switches to one side of the drainage passage and the remaining part of the outgoing pipe from the communication connection part of the passage to the bathtub, and drain water generated in the latent heat exchanger In the drain water drain operation for draining drain water in the drain tank, the drain pump in the drain tank is driven to drive the circulation water to the drain heat in the drain tank via the circulation pump. Through the vessel and the outgoing pipe in order A hot water bath apparatus for discharging water from the water flow path switching valve to the outside through the drainage passage, wherein the control device for controlling the operation of the hot water bath apparatus controls the pipe check operation mode for distinguishing between the outgoing pipe and the return pipe. For inspecting erroneous connection of the recirculation part, the forward pipe and the return pipe to the circulation / drainage switching valve and the bathtub under the condition that residual water that can be circulated through the recirculation circulation passage is in the bathtub. A pipe connection check operation mode control unit, and the pipe check operation mode control unit receives a pipe check command to open a pouring / water pouring solenoid valve and the pouring / water pouring channel. It has a control structure for supplying hot water or non-heated water from the hot water supply pipe to the hot water / water supply passage by performing an operation of switching the switching valve to water flow only to the outgoing pipe, and the pipe connection check The operation mode controller is a tube. Having a control configuration for driving the circulation pump after switching the circulation / drainage flow path switching valve to the drainage passage side in response to a road connection check command, this is a means for solving the problem.

  Further, the fourth invention is provided with the configuration of the second or third invention, and the recirculation circulation from the bathtub to the circulation / drainage switching valve through the circulation pump and the recuperation heat exchanger in order. An error signal output unit is provided that includes water flow detection means for detecting water flow in the passage, and outputs an error signal when water flow is not detected by the water flow detection means during operation in the pipe connection check operation mode. It is a means to solve the problem.

  In the invention having the control unit for the pipeline check operation mode, the pipeline check operation is performed with one end of the pipe (pipe) connected to the return side and the forward side connection port of the recirculation circulation passage of the combustion appliance. By proceeding with the control operation of the mode control unit, the hot water / water injection solenoid valve is opened, and water (or hot water) is supplied from the hot water supply pipe to the hot water / water supply passage. Since it is discharged only through the pipe, a worker who installs and installs a new combustion appliance senses the vibration of the water flow by looking at the water discharged from the outlet of the pipe or touching the pipe. Thus, it is possible to easily recognize and distinguish which pipe (pipe) of the two pipes before being connected to the bathtub of the recirculation circulation passage connected to the combustion appliance is the outgoing pipe. Therefore, a circulation / drain flow path switching valve (a unit of the circulation / drain flow path switching valve) can be correctly incorporated in the distinguished outgoing pipe. Then, connect the piping side incorporating the circulation / drainage switching valve to the connecting part of the outgoing pipe of the bathtub, and connect the remaining piping to the connecting position of the return pipe of the bathtub (the nonpolar circulating adapter is connected to the bathtub). If it is installed, connect it to an optional connection port of the adapter), and connect a recirculation circulation passage that correctly incorporates a circulation / drainage channel switching valve (circulation / drainage channel switching valve unit) Construction work can be performed efficiently.

  In addition, when a circulation / drainage channel switching valve (circulation / drainage channel switching valve unit) is incorporated in the outgoing pipe of the recirculation circulation passage of an existing hot water bath system, it is already connected between the combustion appliance and the bathtub. By touching the pipe to detect which of the two pipes of the recirculation circulation passage that is the outgoing pipe is touching the pipe and detecting the vibration of the water flow, Outgoing tube can be distinguished and recognized. Therefore, by dividing the outgoing pipe with the distinction in the middle and incorporating a circulation / drainage channel switching valve (circulation / drainage channel switching valve unit) at the segmentation point, circulation / drainage flow without misconnection It is possible to correctly incorporate the path switching valve (circulation / drainage channel switching valve unit) into the outgoing pipe.

  Furthermore, in the invention having the control unit for the pipe connection check operation mode, the control operation of the control unit for the pipe connection check operation mode is advanced, so that the circulation / drainage switching valve (circulation / drainage) When the flow path switching valve unit) is correctly installed, the circulation pump is driven and the remaining water in the bathtub is sucked out from the return pipe to the circulation pump. And then discharged from the circulation / drainage channel switching valve through the drainage passage. On the other hand, when the circulation / drainage channel switching valve (circulation / drainage channel switching valve unit) is mistakenly installed in the return pipe, the bath water is not sucked by the circulation pump. The bathtub water is not sucked in by the circulation pump because it is communicated to the drainage passage by the flow path switching valve and not to the bathtub), so that the residual water in the bathtub is not discharged from the drainage passage even if the circulation pump is driven.

  Therefore, when the remaining water in the bathtub is discharged from the drainage passage after the circulation pump is driven, the circulation / drainage channel switching valve (circulation / drainage channel switching valve unit) is correctly incorporated in the outgoing pipe. I can confirm that. On the other hand, when the residual water in the bathtub is not discharged from the drainage passage after the circulation pump is driven, the circulation / drainage channel switching valve (circulation / drainage channel switching valve unit) is mistakenly incorporated into the return pipe. In this case, the circulation / drainage channel switching valve (the unit of the circulation / drainage channel switching valve) is immediately re-installed in the other pipe (outward pipe). The (circulation / drainage switching valve unit) can be correctly incorporated into the outgoing pipe.

  Further, in the invention including the control unit for the pipe connection check operation mode and the error signal output unit, the control operation of the control unit for the pipe connection check operation mode is advanced as described above, and the circulation pump is driven. Sometimes, when the circulation / drainage channel switching valve (circulation / drainage channel switching valve unit) is correctly installed in the forward pipe, the water flow in the circulation channel is detected by the water flow detection means. However, if the circulation / drainage channel switching valve (circulation / drainage channel switching valve unit) is mistakenly installed in the return pipe, the circulation / drainage channel switching valve connects the circulation pump to the drainage passage. Therefore, the water flow is not detected by the water flow detection means, and an error signal is output from the water flow detection means.

  Therefore, when the control operation of the control unit in the pipe connection check operation mode is being performed, an error is detected from the water flow detection means even if it is not visually confirmed whether or not the bathtub residual water is discharged from the drainage passage. When no signal is output, it can be confirmed that the circulation / drainage channel switching valve (circulation / drainage channel switching valve unit) is correctly installed in the outgoing pipe, and when an error signal is output from the water flow detection means Is detected and the circulation / drainage channel switching valve (circulation / drainage channel switching valve unit) is mistakenly incorporated into the return pipe. At this time, the circulation / drainage channel switching valve (circulation / drainage channel switching valve) It is possible to correctly reassemble the drainage flow path switching valve unit in the outgoing pipe.

It is explanatory drawing of one Embodiment of the circuit structure of the control apparatus in the hot water bath apparatus of this invention. 1 is a system configuration diagram of a bath water heater that is under development by the applicant and is also an embodiment of the present invention. It is external appearance explanatory drawing of the flow-path switching unit integrated in the outgoing pipe of the hot water bath apparatus of one Embodiment. It is explanatory drawing which shows the example of installation of a flow-path switching unit. It is a flowchart which shows operation | movement of the pipe line check operation mode in this embodiment. It is a flowchart which shows operation | movement of the pipe line connection check operation mode in this embodiment. It is explanatory drawing of each connection aspect of an outgoing tube and a return tube. It is explanatory drawing of each other connection aspect of an outgoing tube and a return tube. It is explanatory drawing of each other connection aspect of an outgoing tube and a return tube.

  Embodiments of the present invention will be described below with reference to the drawings. The embodiment of the system configuration of the hot water bath apparatus in the present invention is the same as the contents described in FIG. 2 and “Background Art” described above, and a duplicate description thereof will be omitted.

  A feature of the present invention is that the configuration of the control circuit of the control device of the hot water bath apparatus is a unique configuration. The control device of the present embodiment has a circuit configuration for controlling the operation of each operation of the hot water bath device described above, and the third switching valve 35 (drain drainage switching unit 36) is connected to the return pipe 28 and the outgoing pipe 30. A control structure of a specific check operation mode for correctly connecting to the outgoing tube 30 is provided.

  FIG. 1 shows an embodiment of a control configuration of a check operation mode which is a feature of the present invention. The control configuration of the check operation mode includes a control unit 60 for the pipeline check operation mode, a control unit 61 for the pipeline connection check operation mode, and an error signal output unit 62.

  In the present embodiment, the control device is installed on the main body side of the combustion appliance 1 and performs two-way communication with the combustion appliance 1 and a main control board on which a main control circuit for controlling each operation of the hot water bath device is formed. And a control board (circuit board on which a remote control circuit is formed) installed in a remote controller (remote control device) for remotely controlling the combustion appliance 1 and performing a pipe line check operation. The mode control unit 60, the pipe connection check operation mode control unit 61, and the error signal output unit 62 may be provided on the main control board on the main body side of the combustion appliance 1, or provided on the control board of the remote controller. Alternatively, part of the main control board may be provided, and the remaining part may be provided on the control board of the remote controller.

  The control unit 60 in the pipe check operation mode installs the combustion appliance 1 at the installation location during construction for newly installing the combustion appliance 1 and communicates with the additional heat exchanger 12 in the combustion appliance 1. After connecting one end side of each of two pipes (pipe lines) for forming a pipe to a pipe connection position on the combustion appliance 1 side (more specifically, the case side of the apparatus of the combustion appliance 1), drain drain switching In order to connect the unit 36 (third switching valve 35) to the outgoing pipe 30 (30b), which of the two pipes for the recirculation circulation path led out from the combustion appliance 1 is the outgoing pipe 30b. This is to control the operation to be performed to identify whether or not.

  Alternatively, the adapter 31 provided in the bathtub 32 is derived from the combustion appliance 1 when the drain water discharge switching unit 36 is incorporated by reusing a pipe of an existing bath hot water system in which a nonpolar circulation type is used. It controls the operation performed to distinguish which of the two pipes for the recirculation circulation passage is the outgoing pipe 30b.

  The control operation of the control unit 60 in this pipeline check operation mode is started upon receiving a pipeline check command by operating a button or a switch on a remote controller, for example (see FIG. 5). In response to this command, the control unit 60 in the pipe check operation mode operates the second switching valve (pour water / water flow channel switching valve) 34 to supply the hot water / water supply passage 20 (specifically, the pump communication passage). 24) is switched to the pump suction port 25 side of the circulation pump 47 (during this operation, the first switching valve 33 is in a fixed position for switching the flow path in which the hot water / water supply passage 20 is connected to the pump communication passage 24). The pouring / water pouring solenoid valve 44 is opened.

  Then, water entering the water supply pipe 14 passes through the latent heat exchanger 4, the main heat exchanger 3, and the hot water supply pipe 15 in order and enters the hot water / water supply passage 20. Further, the first switching valve 33, hot water / water The pump communication passage 24 functioning as the supply passage 20, the second switching valve 34, the pump suction port 25, the circulation pump 47, the pump discharge port 26, the conduit 29, and the reheating heat exchanger 12 are sequentially passed. It flows out from the tip of the tube 30b.

  The worker who installs and installs the combustion appliance 1 receives water (hot water if the hot water supply burner 5 is burned) only from one of the two pipes for the recirculation circulation passage led out from the combustion appliance 1 side. Since the water flows out, it can be recognized that the pipe from which the water flows out of the two pipes is the outgoing pipe 30b when the water flows out. In this way, since water flows only to one of the two pipes, if the two pipes are touched by hand, vibration caused by the water flow is transmitted to the hand from the pipe through which the water flows, and the other pipe Since no vibration is transmitted from the pipe, it is possible to easily distinguish and recognize which of the two pipes is the outgoing pipe 30b without looking at the water flowing out.

  Therefore, the worker can correctly connect the outgoing pipe 30b to the forward (incoming) side which is the outgoing pipe 30b connection port of the drain / drainage switching unit 36 (third switching valve 35). Then, one end side of the outgoing pipe 30a is connected to the outlet (outlet) which is a connection port of the outgoing pipe 30a of the drain drain switching unit 36 (third switching valve 35), and the other end side of the outgoing pipe 30a is connected to the adapter 31. By connecting the return pipe 28, which is the other pipe, to the connection port of the adapter 31, the recirculation circulation in which the drain drainage switching unit 36 (third switching valve 35) is incorporated in the forward pipe 30. The pipe connection construction of the passage 27 is completed.

  Further, one end side of the drainage passage 48 is connected to an attachment port (drain drainage) to which the drainage passage 48 of the drain drainage switching unit 36 is attached, and the other end side is extended to the drainage port of the bathroom washroom. The mistakes in the pipe connection work here are (1): when the outgoing pipe 30 and the return pipe 28 are mistaken, and (2): the outgoing pipe 30b is connected to the connection port of the outgoing pipe 30a, and the remaining outgoing pipe There are two possible mistakes in connecting the outgoing tube 30a to the connection port 30b. In addition, the attachment port diameter to which the drainage passage 48 is attached is made smaller than other attachment port diameters to prevent erroneous connection.

  However, if the mounting port diameter is reduced (the drainage passage 48 is narrowed) to prevent erroneous connection, the internal pressure of the pipe increases due to the drainage water pressure. Therefore, in the present embodiment, the flow rate for washing is limited so that drained drain does not remain in the pipe, and the internal pressure of the pipe does not rise abnormally. For example, the flow rate is 9 liters per pipe diameter 7A (inner diameter 7 mm) of the drainage passage 48. I have control over the minute. That is, the flow rate of the water to be washed so that the drain does not remain in the pipe is limited for the purpose of reducing the mounting port diameter in order to prevent erroneous connection and for the purpose of reducing the drainage sound.

  The control unit 61 in the pipe connection check operation mode performs the pipe connection work of the recirculation circulation passage 27 in which the drain drainage switching unit 36 (third switching valve 35) is incorporated (removal between the combustion appliance 1 side and the bathtub 32). At the stage after the completion of the operation of connecting the piping of the circulating circulation passage 27), the forward draining pipe 36 is correctly installed in the outgoing piping 30 b of the additional circulation passage 27. A control operation is performed to check whether or not 30a is correctly connected to the outgoing pipe connection position of the bathtub 32 (adapter 31). This control operation is also performed by connecting a pipeline by operating a button or a switch on a remote controller, for example. It starts upon receipt of a check command (see FIG. 6).

  In response to this command, the control unit 61 in the pipe connection check operation mode determines whether or not the remaining water at the water level that can be circulated is determined by determining whether or not the running water switch 45 is turned on through the recirculation circulation passage 27 by driving the circulation pump 47. Judge whether or not there is. When there is residual water at the water level in the bathtub 32, the control operation of the pipe connection check operation mode is advanced, and when there is no residual water, the progress of the control operation is stopped. When there is no remaining water, that fact may be displayed on the display unit of the remote controller, for example.

  In general, when the installation of the hot water bath apparatus is completed, a trial run of hot water filling to the bathtub 32 is performed, and at this time, the relationship between the water level (P) of the hot water filling of the bathtub 32 and the amount Q of water dropped into the bathtub 32 Is automatically created as data for automatic filling and stored in the memory. At the time when the automatic creation of the PQ data is finished, there is residual water in the bathtub 32. Therefore, after the automatic creation of the PQ data, the pipe by the control unit 61 in the pipe connection check operation mode is performed. It is convenient to start the control operation in the road connection check operation mode.

  When it is confirmed that there is residual water in the bathtub 32, the control unit 61 in the pipe connection check operation mode controls the third switching valve 35 to switch the outgoing pipe 30b to the drainage passage 48, and the outgoing pipe 30b. The drainage passage 48 is communicated. Then, the circulation pump 47 is driven. In this operation mode, the second switching valve 34 is in a fixed position for switching the flow path, and the pump suction port 25 of the circulation pump 47 is switched to the branch passage 28b of the return pipe 28. When the outgoing pipe 30 (30a) incorporating the (third switching valve 35) is correctly connected to the outgoing pipe connection position of the adapter 31, the circulation pump 47 is driven to drive the remaining in the bathtub 32. The water is drained through the return pipe 28, the branch passage 28b, the pump suction port 25, the circulation pump 47, the pump discharge port 26, the pipeline 29, the reheating heat exchanger 12, the outgoing pipe 30b, and the third switching valve 35 in this order. Residual water is discharged from the passage 48 (see FIG. 7C).

  On the other hand, as shown in FIG. 7A, the return pipe 28 (28-b) in which the drain (on) attachment port of the drain / drainage switching unit 36 (third switching valve 35) is connected to the pump suction port 25. ) And the forward / outgoing attachment port is connected to the bathtub 32 (adapter 31) (for example, with the return pipe 28-a) (when the adapter 31 is a nonpolar type, the two connection ports of the adapter 31) In the case where the return pipe 28-b is connected to any one side and the forward pipe 30 is connected to the other side), for example, for 20 seconds while hot water in the return pipe 28 (28-b) is pumped in, the running water SW Is turned off by immediately sucking air from the drainage passage 48, and an error is displayed, for example, after 50 seconds, which is the circulation judgment delay time. Further, for example, residual water is discharged from the drainage passage 48 for 20 seconds, but it stops immediately, so that the operator can also visually check for erroneous piping.

  As shown in FIG. 7 (b), the drain (outlet) attachment port of the drain / drainage switching unit 36 (third switching valve 35) is connected to the return pipe 28 (28-b) connected to the pump suction port 25. , When the forward (in) attachment port is connected to the bathtub 32 (adapter 31) (for example, by the return pipe 28-a) (if the adapter 31 is a nonpolar type, any one of the two connection ports of the adapter 31) In the case where the return pipe 28-a is connected to the side and the forward pipe 30 is connected to the other side), the hot water in the bathtub cannot be sucked in by the pump, so the running water SW continues to be turned off, for example, after 50 seconds as the circulation judgment delay time An error is displayed. Further, since the remaining water is not discharged from the drainage passage 48, the operator can visually confirm the erroneous piping.

  Furthermore, as shown in FIG. 7 (d), the forward / outgoing attachment port of the drain / drainage switching unit 36 (third switching valve 35) and the forward pipe 30 (30b) connected to the reheating heat exchanger 12 When the connection port is connected to the bathtub 32 (adapter 31) (with the forward tube 30a) (if the adapter 31 is a non-polar type, one side of the two connection ports of the adapter 31) In the case where the return pipe 28 and the forward pipe 30a are connected to the other side), since the bath water cannot be sucked and discharged, the flowing water SW continues to be turned off. For example, an error occurs after 50 seconds as the circulation judgment delay time. Displayed. Further, since the remaining water is not discharged from the drainage passage 48, the operator can visually confirm the erroneous piping.

  Therefore, when the operator can visually confirm that the residual water in the bathtub 32 has been discharged from the drainage passage 48 after the circulation pump 47 is driven, the drain drainage switching unit 36 (the third switching valve 35). ) Is incorporated, it can be confirmed that it is correctly connected to the outgoing tube connection position of the adapter 31. Otherwise, as shown in FIGS. 7 (a) and 7 (b). In addition, the drain drain switching unit 36 (third switching valve 35) is erroneously connected to the return pipe 28, or as shown in FIG. 7D, the outgoing pipe is connected to the connection port of the outgoing pipe 30a. 30b is connected, and it turns out that the outgoing pipe 30a is connected to the connection port of the remaining outgoing pipe 30b, and piping connection can be correctly redone on the spot.

  When the adapter 31 is configured of a nonpolar circulation type, the drain / drainage switching unit 36 (third switching valve 35) is correctly connected to the outgoing pipe 30 by the check operation of the control unit 60 in the pipe check operation mode. Since the forward pipe 30a incorporating the drain / drainage switching unit 36 (third switching valve 35) can be connected to either of the two connection ports for the recirculation circulation passage of the adapter 31, the pipe Although it seems that the control configuration of the control unit 61 in the line connection check operation mode is not necessarily required, depending on the operation of the control unit 61 in the pipe connection check operation mode, when the adapter 31 is configured of a nonpolar circulation type. When the residual water is not discharged from the drainage passage 48 after the circulation pump 47 is driven, the drain / drainage switching unit 36 (first Therefore, it is determined whether or not the drain / drainage switching unit 36 (third switching valve 35) is incorporated in the outgoing pipe 30 in the control of the pipeline check operation mode. The merit that the double check can be performed by the control operation of the unit 60 and the control operation of the control unit 61 in the pipe connection check operation mode, and the inspection judgment can be perfected.

  The error signal output unit 62 operates in connection with the control operation of the control unit 61 in the pipe connection check operation mode, and after the circulation pump 47 is driven by the control operation of the control unit 61 in the pipe connection check operation mode. Then, it waits for the input of a running water detection signal from the running water switch 45 as circulating water detection means. The running water switch 45 outputs an ON signal as a running water detection signal when running water is detected, and is well known to those skilled in the art. Therefore, the description of the configuration of the running water switch 45 is omitted.

  When the error signal output unit 62 receives a flowing water detection signal (ON signal) from the flowing water switch 45, the return pump 28, the branch passage 28b, the circulating pump 47, the pipe 29, the reheating heat from the bathtub 32 by driving the circulation pump 47. It is determined that there is running water that passes through the exchanger 12, the outgoing pipe 30 b, and the third switching valve 35 in order and flows into the drainage passage 48. That is, when the flowing water detection signal is obtained from the flowing water switch 45, it is determined that the outgoing pipe 30a in which the drain drainage switching unit 36 (third switching valve 35) is incorporated is correctly connected to the adapter 31. It should be noted that a circulation judgment delay time (for example, 50 seconds) is provided, and judgment is made by receiving a running water detection signal (ON signal) from the running water switch 45 after, for example, 50 seconds designated as the circulation judgment delay time after the circulation pump 47 is driven. May be.

  On the other hand, after the circulation pump 47 is driven, when no flowing water detection signal (ON signal) is input from the flowing water switch 45, the flowing water is not detected by the flowing water switch 45, that is, the circulating pump 47 is driven. It is determined that the residual water in the bathtub 32 is not sucked by the circulation pump 47 and the outgoing pipe 30a in which the drain drainage switching unit 36 (third switching valve 35) is incorporated is not correctly connected to the adapter 31. And output an error signal.

  This error signal is applied to a display unit 59 such as a remote controller, and an error is displayed on the display unit 59. The operator sees this error display and confirms that the outgoing pipe 30a in which the drain drainage switching unit 36 (third switching valve 35) is incorporated is not correctly connected to the outgoing pipe connection position of the adapter 31 (incorrectly). Connection to the return pipe connection position), the connection of the outgoing pipe 30a can be corrected correctly.

  By providing this error signal output unit 62, an operator can display the display unit of a remote controller or the like without having to go to the drain outlet of the drain passage 48 to see whether or not the residual water in the bathtub 32 is discharged from the drain passage 48. Since whether or not the connection state to the outward tub 32 can be determined by the presence or absence of the error display 59, it is convenient for improving work efficiency. If both the confirmation of whether or not the residual water in the bathtub 32 is discharged from the drainage passage 48 and the presence or absence of an error display on the display unit 59 such as a remote control are performed, a double check state is established, and the drain drainage switching unit 36 (first It is possible to more accurately determine whether or not the outgoing pipe 30a in which the third switching valve 35) is incorporated is correctly connected to the outgoing pipe connection position of the adapter 31.

  In addition, this invention is not limited to the said embodiment example, Various embodiment can be taken in the range which does not deviate from the technical thought (technical scope) of this invention. For example, in the above embodiment, the control unit 60 in the pipeline check operation mode and the control unit 61 in the pipeline connection check operation mode are both provided in the control device, but the control unit 60 in the pipeline check operation mode and the pipeline connection check are provided. Only one of the operation mode control units 61 may be provided in the control device.

  Moreover, in the said embodiment, although the error signal output part 62 was provided in relation to the control part 61 of the pipe line connection check operation mode, this error signal output part 62 may be abbreviate | omitted. Further, it is not necessary to provide a circulation determination delay time (for example, 50 seconds). Further, although the embodiment has been described in which the pipe diameter of the forward pipe 30 and the return pipe 28 is the same and only the drainage drain passage is changed, the pipe diameters may all be the same. In this case, in the case of the pipe connection state shown in FIGS. 8A to 8D and FIGS. 9A to 9D, the control unit 61 in the pipe connection check operation mode is placed in the bathtub 32. This is because an error can be given at a stage where it is confirmed that there is residual water, or the operator can be notified of erroneous piping by visual confirmation.

  Table 1 shows that the flow path switching unit 36 (third switching valve 35) has the same attachment port (for example, 10A) and the drain attachment line (drain passage 48). ) Is a summary of the pipe connection check operations in the pipe connection modes shown in FIGS. 7A to 7D when only the attachment port is different (for example, 7a).

  Table 2 shows that the operation for checking the remaining water in the bathtub is performed using only the water flow switch 45, and the flow switching unit 36 (third switching valve 35) has a flow (in) attachment port and a flow (out). Each of the pipe connection modes, which is also applied when the three attachment ports and drain drainage (drainage passage 48) attachment ports are the same, here, FIGS. 7 (a) to (d), FIG. 8 (a) to FIG. (D), The pipe connection check operation in the pipe connection mode shown in Drawing 9 (a)-(d) is summarized.

  7 (a) to (d), FIGS. 8 (a) to (d), and FIGS. 9 (a) to (d), the pipe connection mode of the connection port of the third switching valve 35 is a table. Table 5 shows the pipe connection mode to the connection port of the adapter 31 when the adapter 31 is a nonpolar type.

  Furthermore, in the above embodiment, the flowing water switch 45 is used as the circulating water detection means, and the flowing water switch 45 is described as an example. However, the circulating water detection means only needs to be able to detect flowing water, and the sensors other than the flowing water switch 45 are circulated. You may use as a water detection means. Further, the pipeline check command is not particularly limited, for example, it may be an operation other than the remote control, for example, an operation on the main board.

  The hot water bath apparatus of the present invention sucks drain water collected and stored in the drain tank from the latent heat exchanger with a circulation pump, introduces it into the recirculation passage of the bath, and drains a part of the outgoing pipe of the recirculation circulation passage. It can be applied to one that is also used as a passage for draining water.

DESCRIPTION OF SYMBOLS 1 Combustion tool 3 Main heat exchanger 4 Latent heat exchanger 12 Reheating heat exchanger 15 Hot water supply pipe 19 Drain tank 20 Hot water / water supply passage 23 Drain tank discharge passage 27 Reheating circulation passage 28 Return pipe 30 (30a, 30b) Outgoing pipe 32 Bathtub 34 Second switching valve (poured water / water flow switching valve)
35 3rd switching valve (circulation / drainage switching valve)
36 Drain drainage switching unit 44 Pouring / water pouring solenoid valve

Claims (4)

  A main heat exchanger that absorbs the sensible heat of the combustion gas of the burner, and a latent heat exchanger that is disposed downstream of the main heat exchanger in the flow of the combustion gas and absorbs the latent heat of the combustion gas The hot water is made by heating the water passing through the latent heat exchanger to the main heat exchanger in order, and the hot water is supplied to the hot water destination through the hot water pipe, and the bathtub water is passed through the return pipe. A recirculation circulation path that leads to the pump suction port of the circulation pump and returns the bathtub water sent from the pump discharge port of the circulation pump to the bathtub through the return pipe from the reheating heat exchanger via the heat exchanger; A hot water / water supply passage formed by connecting a hot water supply pipe of the hot water supply heat exchanger and the recirculation circulation passage via a pouring / water injection solenoid valve, the hot water / water supply passage, and the recirculation circulation passage, The hot water / water supply passage is A hot water / water injection flow path switching valve for selectively switching the hot water or water supplied to both the outgoing pipe and the return pipe and the outgoing pipe only, and connected to the outgoing pipe. A drainage passage, and a part of the outgoing pipe from the reheating heat exchanger to the communication connection portion of the drainage passage from the communication connection portion of the drainage passage. A circulation / drainage switching valve that selectively switches to one side of the remaining passage of the outgoing pipe leading to the bathtub and the drainage passage, and a drain tank that stores drain water generated in the latent heat exchanger In the drain water draining operation for draining drain water in the drain tank, the circulation pump is driven to drain the drain water in the drain tank through the circulation pump, and the reheating heat exchanger and the outgoing pipe are sequentially connected. Through the circulation / drainage channel switching valve A hot water bath apparatus that discharges to the outside through the drainage passage, and a control device that controls the operation of the hot water bath apparatus includes a control unit for a pipeline check operation mode for distinguishing between the outgoing pipe and the return pipe, In response to the pipe check command, the control unit in the pipe check operation mode performs an opening operation of the pouring / water pouring solenoid valve and an operation of switching the pouring / water pouring flow path switching valve to water flow only to the outgoing pipe. A hot water bath apparatus having a control structure for performing hot water or non-heated water from the hot water supply pipe to the hot water / water supply passage.   A main heat exchanger that absorbs the sensible heat of the combustion gas of the burner, and a latent heat exchanger that is disposed downstream of the main heat exchanger in the flow of the combustion gas and absorbs the latent heat of the combustion gas The hot water is made by heating the water passing through the latent heat exchanger to the main heat exchanger in order, and the hot water is supplied to the hot water destination through the hot water pipe, and the bathtub water is passed through the return pipe. A recirculation circulation path that leads to the pump suction port of the circulation pump and returns the bathtub water sent from the pump discharge port of the circulation pump to the bathtub through the return pipe from the reheating heat exchanger via the heat exchanger; A hot water / water supply passage formed by connecting a hot water supply pipe of the hot water supply heat exchanger and the recirculation circulation passage via a pouring / water injection solenoid valve, the hot water / water supply passage, and the recirculation circulation passage, The hot water / water supply passage is A hot water / water injection flow path switching valve for selectively switching the hot water or water supplied to both the outgoing pipe and the return pipe and the outgoing pipe only, and connected to the outgoing pipe. A drainage passage, and a part of the outgoing pipe from the reheating heat exchanger to the communication connection portion of the drainage passage from the communication connection portion of the drainage passage. A circulation / drainage switching valve that selectively switches to one side of the remaining passage of the outgoing pipe leading to the bathtub and the drainage passage, and a drain tank that stores drain water generated in the latent heat exchanger In the drain water draining operation for draining drain water in the drain tank, the circulation pump is driven to drain the drain water in the drain tank through the circulation pump, and the reheating heat exchanger and the outgoing pipe are sequentially connected. Through the circulation / drainage channel switching valve A hot water bath apparatus that discharges to the outside through the drainage passage, wherein the control device that controls the operation of the hot water bath apparatus misconnects the outgoing pipe and the return pipe to the circulation / drainage switching valve and the bathtub, A control unit for a pipe connection check operation mode for inspecting under conditions where residual water that can be circulated through the recirculation circulation passage is in the bathtub, and the control unit for the pipe connection check operation mode is A hot water bath apparatus having a control structure for driving a circulation pump after receiving a connection check command and switching the circulation / drainage channel switching valve to the drainage passage side.   A main heat exchanger that absorbs the sensible heat of the combustion gas of the burner, and a latent heat exchanger that is disposed downstream of the main heat exchanger in the flow of the combustion gas and absorbs the latent heat of the combustion gas The hot water is made by heating the water passing through the latent heat exchanger to the main heat exchanger in order, and the hot water is supplied to the hot water destination through the hot water pipe, and the bathtub water is passed through the return pipe. A recirculation circulation path that leads to the pump suction port of the circulation pump and returns the bathtub water sent from the pump discharge port of the circulation pump to the bathtub through the return pipe from the reheating heat exchanger via the heat exchanger; A hot water / water supply passage formed by connecting a hot water supply pipe of the hot water supply heat exchanger and the recirculation circulation passage via a pouring / water injection solenoid valve, the hot water / water supply passage, and the recirculation circulation passage, The hot water / water supply passage is A hot water / water injection flow path switching valve for selectively switching the hot water or water supplied to both the outgoing pipe and the return pipe and the outgoing pipe only, and connected to the outgoing pipe. A drainage passage, and a part of the outgoing pipe from the reheating heat exchanger to the communication connection portion of the drainage passage from the communication connection portion of the drainage passage. A circulation / drainage switching valve that selectively switches to one side of the remaining passage of the outgoing pipe leading to the bathtub and the drainage passage, and a drain tank that stores drain water generated in the latent heat exchanger In the drain water draining operation for draining drain water in the drain tank, the circulation pump is driven to drain the drain water in the drain tank through the circulation pump, and the reheating heat exchanger and the outgoing pipe are sequentially connected. Through the circulation / drainage channel switching valve A hot water bath apparatus that discharges to the outside through the drainage passage, and a control device that controls the operation of the hot water bath apparatus includes a control unit for a pipe check operation mode for distinguishing the forward pipe and the return pipe, Pipe connection check operation for inspecting the incorrect connection of the pipe and return pipe to the circulation / drainage switching valve and the bathtub under the condition that there is residual water that can be circulated through the recirculation circulation passage. A control unit for the mode, and the control unit for the pipe check operation mode receives the pipe check command, and opens the pouring / water pouring solenoid valve and the pouring / water pouring channel switching valve. And a control unit for supplying hot water or non-heated water from the hot water supply pipe to the hot water / water supply passage through the operation of switching to only water flow, and the control unit for the pipe connection check operation mode Receives a pipe connection check command. Therefore, the hot water bath apparatus has a control configuration in which the circulation pump is driven after the circulation / drainage channel switching valve is switched to the drainage passage side.   It is equipped with water flow detection means that detects water flow in the recirculation circulation passage from the bathtub to the circulation / drainage flow switching valve through the circulation pump and reheating heat exchanger in order, during the operation of the pipe connection check operation mode The hot water bath apparatus according to claim 2 or 3, further comprising an error signal output unit that outputs an error signal when water passage is not detected by the water passage detection means.

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