JP2012077996A - Hot water supply bath device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device which is suitable to control over an operation mode in which motors of a plurality of motor-driven selector valves for flow passage switching are driven simultaneously for a hot water supply bath device equipped with the plurality of selector valves.SOLUTION: The control device includes a main control board 50 and a child board 53. The main control board 50 includes a main control circuit which controls device operations and a power supply circuit 51. The child board 53 includes a motor control driving circuit 58. The motor control driving circuit 58 alternately drives a motor M1 for a first selector valve and a motor M2 for a second selector valve one by one at different timings in a motor simultaneous operation mode of the motor M1 and the motor M2 by applying a power supply voltage from the power supply circuit 51 of the main control board 50 directly or through a remote control device.

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. A third switching valve 35 is provided in the outgoing pipe 30, and the third switching valve 35 serves as a passage for flowing water flowing from the reheating heat exchanger 12 side through the outgoing pipe 30 to the bathtub 32 side. The drainage passage 48 is selectively switched to one side of the passage to the drainage passage 48, and the drainage passage 48 is disposed in the bathroom, and the water discharged from the drainage passage 48 enters the drainage outlet of the washroom in the bathroom and goes to the outside. It consists of a drained configuration. 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 and is incorporated in the outgoing pipe 30.

  The pump suction port 25 of the circulation pump 47 is connected to the return pipe 28 through the second switching valve 34, and one of the bathtub 32, the return pipe 28, and the branch passages 28a and 28b of the return pipe 28. The passage returning to the bathtub 32 through the branch passage 28a on the side, the circulation pump 47, the pipe 29, the reheating heat exchanger 12, the forward pipe 30, and the third switching valve 35 in this order forms a recirculation circulation path 27. Yes.

  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.

  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.

  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.

  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.

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

  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 third switching valve 35 remains at the switching position of the drain drainage operation, and the outgoing pipe 30 b is in a state of being connected to the drainage 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.

  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.

Japanese Patent Publication No. 7-94887

  In the initial stage of development of the apparatus shown in FIG. 2, the present inventor switched both in the motor simultaneous operation mode in which the motor of the first switching valve 33 and the motor of the second switching valve 34 are operated simultaneously. An attempt was made to form a control circuit for controlling the entire apparatus on one circuit board by simultaneously driving the motors of the valves 33 and 34 at exactly the same time. However, the hot water bath apparatus is not equipped with the first switching valve 33 and the second switching valve 34 shown in FIG. 2 (in this case, the third switching valve 35) as an option (for example, a drain). There is also a type of device that drains the drain water in the tank 19 from the drain tank 19 to the outside using a dedicated drain pipe without using the circulation pump 47, and these devices and the circuit board are used in common. Since a circuit for controlling and driving the switching valves 33 and 34 must be formed also on the circuit board of the device that does not provide the optional device of the switching valves 33 and 34 (and the third switching valve 35 in this case), In addition to the problem that the device cost increases, the case where an optional device for operating both motors of the switching valves 33 and 34 at the same time is provided or not provided. However, there is a large difference in the presence / absence of a load (voltage load) for simultaneous motor control drive. In practice, a common circuit board is used in common and the hot water bath apparatus having different apparatus configurations as described above is also used. It was a problem.

  Therefore, the inventors next examined the control configuration of the control device shown in FIG. In the configuration of FIG. 3A, a circuit board of a control device is formed by a main control board 50 as a parent board and a sub board 53, and the main control board 50 has a first switching valve 33 and a second switching board. A main control circuit of a hot water bath apparatus that is a base that can be used in common with a hot water bath apparatus that does not have an optional apparatus configuration such as the valve 34 is formed, and further, a power supply circuit 51 'of the main control circuit. And a remote control circuit 52 are provided.

  The remote controller (remote control device) is connected to the circuit of the main control board 50 as shown by the solid line, but may be connected to the circuit of the child board 53 as shown by the one-dot chain line. It may be connected to each of 53 circuits.

  The sub-board 53 has motor control drive circuits 55 for the motors M1 and M2 that simultaneously drive the motor M1 of the first switching valve 33 and the motor M2 of the second switching valve 34 at the same time in the motor simultaneous operation mode. ing. The power supply circuit 51 'of the main control board 50 functions as a power supply (for example, DC12V power supply) of the main control circuit, and adds a power supply voltage for simultaneously driving the motors M1 and M2 at the same time to the motor control drive circuit 55. ing. The motor control drive circuit 55 uses the voltage applied from the power supply circuit 51 'as a power supply for the circuit itself of the motor control drive circuit 55 and also uses it as a power supply voltage for driving the motors M1 and M2 at the same time. Note that the remote control circuits 52 and 54 have a circuit configuration for performing mutual communication with a remote control provided outside and performing bidirectional communication directly or via the other remote control circuit.

  The circuit of the control device shown in FIG. 3A has a dedicated circuit for driving the motors M1 and M2 simultaneously at the same time in the motor simultaneous operation mode. It is only necessary to equip the hot water bath apparatus with the child board 53, and the main control board 50 of the parent board does not have an optional apparatus configuration such as the first switching valve 33 and the second switching valve 34. It was expected that it could be used for both hot water bath equipment with an optional equipment configuration.

  However, in order to operate the two motors M1 and M2 simultaneously at the same time with the power supply voltage of the power supply circuit 51 'of the main control board 50, the load increases accordingly, so the capacity of the power supply circuit 51' is increased. Need to do. However, when the capacity of the power supply circuit 51 'is increased, the hardware of the main control circuit formed on the main control board 50 is a hot water bath apparatus having an optional apparatus configuration and a hot water bath apparatus having no optional apparatus configuration. (In other words, the main control circuit hardware cannot be shared), and in fact, the main control board 50 is commonly used for both those having an optional device configuration and those having no optional device configuration. However, if a main control circuit that overcomes such a difficulty is formed, the cost increases.

  On the other hand, the problem of common use of boards between different models as described above is that multiple control constants for common loads that are used the same between different models are stored, and different values are used for different models to be used in common. However, the software is not different, and a solution for common use between different hardware models has not been proposed.

  Therefore, the inventor further examined the circuit shown in FIG. 3B as the circuit of the control device. In the circuit shown in FIG. 3B, a power plug 57 connected to a commercial power source (100V) is provided on the sub board 53 ', and the power plug 57 is inserted into a socket of the commercial power source. Is provided with a power supply circuit 56 for converting a commercial 100V AC power source into a DC power source such as DC 12V, etc., and the two motors M1 and M2 are simultaneously operated at the same time when the power source circuit 56 operates in the motor simultaneous operation mode. To drive.

  However, in the circuit shown in FIG. 3B, since the power supply circuit 56 is also provided on the sub board 53 ′, the cost of the sub board 53 ′ is increased and the power supply circuit on the main control board 50 side as the main board is also provided. Since the two power supply circuits 51 and the power supply circuit 56 on the sub board 53 'side are provided, the standby power becomes large, resulting in a problem that power saving cannot be achieved.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its object is to provide a main control board as a parent board regardless of the presence or absence of an optional device that performs a motor simultaneous operation mode for simultaneously driving a plurality of motors. The main control circuit can be used without changing the main control circuit (without changing the hardware configuration of the main control circuit), and it is not necessary to increase the capacity of the power supply circuit on the parent board. It is an object of the present invention to provide a hot water bath apparatus that can perform the drive control operation in the motor simultaneous operation mode in a hot water bath apparatus having an optional apparatus using the power source of the present invention without any trouble.

  In order to achieve the above object, the present invention is a means for solving the problems with the following configuration. That is, according to the first aspect of the present invention, hot water is prepared by heating water that is passed by the combustion heat of the burner, and a hot water supply heat exchanger that supplies the hot water to a hot water supply destination and a built-in circulation pump that circulates bathtub water. The recirculation heat exchanger provided in the circulating circulation passage and a plurality of flow path switching valves operated by a motor, and each of the two or more flow path switching valves operated by the motor in the operation mode of the apparatus operation In a hot water bath apparatus having a motor simultaneous operation mode for operating a motor simultaneously, a circuit board for a motor simultaneous operation mode in which a control drive circuit for a motor simultaneous operation mode for controlling and driving the motor operated simultaneously is formed. Provided separately from the main control board on which the main control circuit for controlling the operation of the apparatus other than the operation mode is formed, and controls the motor simultaneous operation mode. The drive circuit has a circuit configuration in which the drive of a plurality of motors that are driven simultaneously is shifted and the drive is sequentially switched one by one, and the power supply for the motor drive that sequentially switches the drive one by one is directly from the main control board or hot water supply Having a configuration in which the bath apparatus is supplied via a remote controller that remotely controls the bath apparatus is a means for solving the problem.

  In addition, the second invention has the configuration of the first invention, and the hot water supply heat exchanger has a main heat exchanger that absorbs the sensible heat of the combustion gas by the burner, and more combustion gas than the main heat exchanger. Formed by a latent heat exchanger that is provided downstream of the flow and collects the latent heat of the combustion gas, and passes water supplied from the water supply passage through the latent heat exchanger and then through the main heat exchanger. It is configured to supply hot water, and includes a drain tank that stores drain water generated in the latent heat exchanger, and is supplied from an outlet of a drain tank discharge passage that discharges drain water in the drain tank and the hot water supply heat exchanger side. A first switching valve for selectively switching the water supply water or the hot water / water supply passage outlet to the inlet of the pump communication passage, and suction of the circulation pump from the outlet of the pump communication passage and the bathtub Chasing to the mouth A second switching valve that selectively switches a passage of one part of the circulation passage to the suction port of the circulation pump, and the flow path switching valve that is operated simultaneously by the motor is the first and second switching valves. The structure that is a valve is a means for solving the problem.

  Further, the third invention is provided with the configuration of the second invention, and at the start of the operation of the drainage operation mode for draining the drain from the drain tank, the pump of the second switching valve is operated first. The outlet of the communication passage is switched to the feed port side of the circulation pump, and then the motor of the first switching valve is switched to switch the outlet of the drain tank discharge passage to the inlet of the pump communication passage. A configuration for switching the motor of each switching valve in the order of the switching valve and the first switching valve constitutes means for solving the problem.

  The present invention has a configuration in which an optional circuit board (child board) on which a motor control drive circuit in a motor simultaneous operation mode is formed is provided separately from a main control circuit board (parent board) on which a main control circuit is formed. Convenience that the control circuit board does not have the function of the motor simultaneous operation mode (there is no optional flow path switching valve that operates in the motor simultaneous operation mode) and can also be used as a control board for a base hot water bath apparatus. Is obtained.

  In addition, the drive control of a plurality of motors in the motor simultaneous operation mode is a control drive in which the plurality of motors are not operated strictly (completely) at the same time, but the motors are sequentially driven at different timings. Since the configuration is adopted, the power load for driving a plurality of motors may be a power load for driving one motor.

  Therefore, the main control circuit board that supplies the motor drive power to be operated in the motor simultaneous operation mode does not have the function of the motor simultaneous operation mode (there is no optional watering part that operates in the motor simultaneous operation mode). ) Since it is only necessary to provide the power supply capacity of the control board of the base hot water bath apparatus, it is not necessary to increase the power supply capacity of the main control circuit board. For this reason, the circuit configuration of the main control circuit formed on the main control circuit board (the hardware configuration of the control circuit) may be the same as that without the existing optional device for the simultaneous operation mode of the motor. The control circuit can be conveniently used as it is with an existing base hot water bath apparatus (the hardware configuration of the main control circuit can be shared).

  In addition, the power supply voltage of the main control board can be supplied to an optional circuit board (child board) that forms a motor control drive circuit in the motor simultaneous operation mode to drive multiple motors in the motor simultaneous operation mode. There is no need to provide a dedicated power source for driving a plurality of motors on the circuit board (child board), and it is possible to reduce standby power consumption by eliminating the need for the dedicated power source. It is done.

It is explanatory drawing 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 explanatory drawing of the circuit structure of the control apparatus which this inventor examined beforehand. It is a flowchart which shows the operation | movement of the drain drainage operation which performs the control which shifted the drive timing of the several motor to be used mutually in the motor control drive circuit 58 of this embodiment. It is a flowchart following FIG. 4A. It is a flowchart following FIG. 4A. It is structure explanatory drawing of the operation mode of a pipe line check and a pipe line connection check in this embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, since 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.

  A feature of the present invention is that the configuration of the control circuit of the control device for the hot water bath apparatus is a unique configuration. FIG. 1 shows an embodiment of a circuit configuration of a control device which is a feature of the present invention. In FIG. 1, the same components as those in FIG. 3 are denoted by the same reference numerals, and redundant description thereof is omitted or simplified.

  The inventor of the present application examined the capacity of the power supply voltage (for example, DC12V) supplied from the power supply circuit 51 of the main control board 50 according to the use state, and the results are as follows. (1): In drain drain operation and drain cleaning operation, the circulation pump 47 is driven after switching to a pipe line required for drain drain operation and drain cleaning operation by various switching valves at the start of operation. That is, since a common pipe line is used for the chasing operation, chasing cannot be performed while the pipe is switched by the switching valve by the drain draining operation or the drain cleaning operation.

  (2): Even when a drain drain operation or a drain cleaning operation is being performed, if a hot water tap (not shown) is opened, the hot water is supplied through the hot water supply pipe 15 to a requester of the hot water supply. That is, hot water is supplied even when the pipe is switched by the switching valve by the drain drain operation and the drain cleaning operation.

  (3): In the case where a dedicated drainage pipe is provided so that it is not used for the drainage operation and drain cleaning operation, and the common operation pipeline for the reheating operation, and a dedicated drainage pump is provided. In the middle of switching the pipe line with the switching valve, the chasing operation is possible and the convenience is high.

  As a result of examining the power supply capacity from the use state, in the present invention in which drain drain operation, drain cleaning operation, and the like and the reheating operation are performed in a common pipe, for example, the gas valve used for the reheating operation among the gas valves 11 is The gas valve is not used at the time of drain drainage operation or drain cleaning operation, and the gas valve uses a power supply voltage (for example, DC12V) supplied from the power supply circuit 51. If it is 1, the power supply capacity supplied from the power supply circuit 51 used for tracking can be diverted to the motor equivalent to the switching valve used in the drain drainage operation, drain cleaning operation, etc. I came to the conclusion.

  The control device of the present embodiment is also constituted by a main control board 50 and a sub board 53. The main control board 50 includes a power supply circuit 51 and a remote control circuit 52. The main control board 50 has the same configuration as that of the main control board 50 shown in FIG. It has the same configuration as the circuit board of the control device of the base hot water bath apparatus without the flow path switching valves 33 and 34 (the hardware configuration of the control circuit is the same).

  The difference of the configuration of the control device of the present embodiment from that of FIG. The sub board 53 includes a remote control circuit 54 and a motor control drive circuit 58. The remote control circuit 54 has the same configuration as that shown in FIGS. 3A and 3B. 58 has a unique circuit configuration different from that of FIGS. 3 (a) and 3 (b).

  That is, the motor control drive circuit 58 does not strictly (completely) operate the motor M1 of the first switching valve 33 and the motor M2 of the second switching valve 34 at the same time in the motor simultaneous operation mode. First, the drive timing is shifted from each other, and when switching of the flow path is completed by driving the motor of one switching valve, the energization to the one motor is stopped, and then the motor of the switching valve on the other side is driven. Then, the motor M1 of the first switching valve 33 and the motor M2 of the second switching valve 34 are alternately driven so as to switch the flow path.

  Thus, when driving the first switching valve 33 and the second switching valve 34 in the motor simultaneous operation mode, the motor M1 of the first switching valve 33 and the motor M2 of the second switching valve 34 are switched. In order to drive, although the two motors are driven, the power capacity is sufficient to drive one motor.

  Therefore, the power supply capacity is sufficient by the power supply voltage (for example, DC 12 V) supplied from the power supply circuit 51 of the main control board 50. Therefore, when the motor M1 of the first switching valve 33 and the motor M2 of the second switching valve 34 are driven at the same time, the power capacity of the power circuit 51 'shown in FIG. Therefore, there is no need to change the circuit or add a circuit such as the power supply circuit 56 dedicated to driving the motor shown in FIG. 3B, the circuit configuration of the control device can be simplified, and the circuit configuration shown in FIG. Since it is not necessary to prepare the two power supply circuits 51 and 56, the standby power can be saved.

  The power for driving the motors M1 and M2 by operating the circuit of the motor control drive circuit 58 may be directly supplied from the power supply circuit 51 of the main control board 50 to the motor control drive circuit 58. The motor control drive circuit 58 may be supplied via a remote controller. For example, since the third switching valve 35 provided in the outgoing pipe 30 is installed in the vicinity of the bathtub in the bathroom, the power supply voltage (for example, DC 12 V) is supplied through a remote controller installed in the bathroom. The switching valve 35 may be operated in response to a signal superimposed on the power supply voltage of the remote control line. That is, although the control within the thick line frame shown in FIG. 4 is used as one package to drive three motors, the power capacity is sufficient to drive one motor.

  In the present embodiment, in the motor simultaneous operation mode at the start of the drain drain operation (see FIGS. 4A to 4C), first of the first switching valve 33 and the second switching valve 34, After driving the motor M2 of the second switching valve 34 and switching the outlet of the pump communication passage 24 to the pump suction port 25 of the circulation pump 47, the motor M1 of the first switching valve 33 is driven to drive the pump Since the operation of switching the inlet of the communication passage 24 to the outlet of the drain tank discharge passage 23 is performed (the motors M2 and M2 are driven in turn in the order of the motor M2 and the motor M1), Passages other than the passage through which the drain water passes from the second switching valve 34 to the branch passages 28a and 28b and the drain water draining operation such as the return pipe 28 It enters in it prevent from degradation that contaminate the passage.

  The present invention is not limited to the embodiments shown in FIG. 1 and FIG. 2, and various embodiments can be made without departing from the technical idea of the present invention. For example, in the above-described embodiment, the two motors M1 and M2 are alternately driven in the motor simultaneous operation mode, but a configuration in which three or more motors are simultaneously operated in the motor simultaneous operation mode is incorporated in the hot water bath apparatus system. Alternatively, the motors of the three or more flow path switching valves may be driven alternately.

  For example, the motor M3 driving of the third switching valve 35 in the outgoing pipe 30 is operated after the motor M2 driving operation of the second switching valve 34, and then the motor M1 of the first switching valve 33 is driven. Also good.

  Further, a pipe check operation mode and a pipe connection check operation mode as shown in FIG. 5 are provided, and the motor control drive circuit 58 performs motor drive strictly (completely) at the same time even in each check operation mode. The drive timings may be shifted from each other instead of being operated at.

  The control unit in the pipeline check operation mode is mainly used to form a recirculation circulation passage that is installed at a place where the combustion appliance is newly installed and communicates with a reheating heat exchanger in the combustion appliance during installation of a new combustion appliance. After connecting one end side of each of the two pipes (pipe lines) to the pipe connection position on the combustion appliance side (more specifically, the case side of the apparatus of the combustion appliance), the third switching valve in the forward pipe 30 In order to connect the drain / drainage switching unit (third switching valve 35) containing 35 motors M <b> 3 to the outgoing pipe 30, which of the two pipes for the recirculation circulation path led out from the combustion appliance is selected. It controls the operation to be performed to distinguish whether the pipe is the outgoing pipe.

  In this pipeline check operation mode, the second switching valve (pouring / water pouring channel switching valve) 34 is operated to move the hot water / water supply passage (specifically, the pump communication passage 24) to the pump of the circulation pump 47. Switching to the suction port 25 side (at the time of this operation, the first switching valve 33 is already 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 by shifting the timing) -The water injection solenoid valve 44 is opened.

  Then, water entering the water supply pipe passes through the latent heat exchanger, the main heat exchanger, and the hot water supply pipe in order, and enters the hot water / water supply passage, and further functions as the first switching valve 33 and the hot water / water supply passage 20. The pump communication passage 24, the second switching valve 34, the pump suction port 25, the circulation pump 47, the pump discharge port, the conduit, and the reheating heat exchanger sequentially flow out from the tip of the outgoing pipe.

  The worker who installs and installs the combustion appliance flows out of water (hot water in the case where the hot water supply burner 5 is burned) only from one side of the two pipes for the recirculation circulation passage led out from the combustion appliance side. Therefore, it is possible to recognize that the pipe from which the water flows out of the two pipes is the outgoing pipe by looking at the flowing water.

  Further, the control unit 61 in the pipe connection check operation mode performs the reheating at the stage after the piping connection work of the recirculation circulation passage in which the drain drainage switching unit 36 (third switching valve 35) is incorporated. Whether or not the outgoing pipe is correctly connected to the outgoing pipe connection position of the bathtub 32 (adapter 31) in a state where the drain drain switching unit 36 (third switching valve 35) is correctly incorporated in the outgoing pipe of the circulation passage. This control operation is to check whether water (or hot water) in the bathtub 32 is driven by the circulation pump 47 and there is residual water at a water level that can be circulated through the circulation passage 27. to decide. That is, it is determined whether there is residual water at a water level that can be circulated based on the ON signal of the running water switch 45 that drives the circulation pump 47. 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.

  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, so there is residual water.

  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 forward pipe to the drainage passage 48, and the forward pipe and 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 of the return pipe 28. When the outgoing pipe in which the third switching valve 35) is incorporated is correctly connected to the outgoing pipe connection position of the adapter 31, the circulation pump 47 is driven so that the remaining water in the bathtub 32 is returned to the return pipe. 28, the remaining water is discharged from the drainage passage 48 through the branch passage, the pump suction port 25, the circulation pump 47, the pump discharge port 26, the pipe 29, the reheating heat exchanger 12, the outgoing pipe, and the third switching valve 35 in order. Is done.

  On the other hand, even if the drain drainage switching unit 36 (third switching valve 35) is connected to the return pipe instead of the outgoing pipe, or connected to the outgoing pipe, it is incorrectly connected (there are six ways and five ways are wrong). ), The remaining water in the bathtub 32 is not sucked into the circulation pump 47 even when the circulation pump 47 is driven, or air is sucked in or discharged into the bathtub. It is determined that there is no remaining water, or the remaining water is not discharged from the drainage passage 48, and even if the remaining water is discharged, it stops immediately.

  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). ) Can be confirmed to be correctly connected, otherwise it is known that the connection has been made incorrectly, and the pipe connection can be made again on the spot.

  When the main control board 50 or the sub board 53 senses that the power supply of the bath water heater is plugged into an outlet or when the main control board 50 or the sub board 53 detects that the power is turned on after a power failure, the drain cleaning operation is performed by quickly controlling the switching valve. It is possible to form a time path and wait in the path state during the drain cleaning operation until the start of the operation using the recirculation passage such as hot water operation, automatic operation, heat retention operation, water retention operation, reheating operation, etc. good. If it does in this way, it is possible to quickly perform the expelling operation prior to the operation starting operation that uses the recirculation circulation path.

  INDUSTRIAL APPLICABILITY The present invention is suitable for application to an apparatus having a function of a motor simultaneous operation mode for simultaneously driving a plurality of flow path switching valves in a hot water bath apparatus including a plurality of motor-driven flow path switching valves.

DESCRIPTION OF SYMBOLS 1 Combustion tool 3 Main heat exchanger 4 Latent heat exchanger 12 Reheating heat exchanger 19 Drain tank 20 Hot water / water supply passage 23 Drain tank discharge passage 24 Pump communication passage 25 Pump suction port 26 Pump discharge port 27 Reheating circulation Passage 28 return pipe 28a, 28b branch passage (return pipe branch passage)
30 Outgoing pipe 33 First switching valve 34 Second switching valve 50 Main control board (parent board)
51 Power supply circuit 52, 54 Remote control circuit 53 Sub board 58 Motor control drive circuit M1, M2 Motor

Claims (3)

  Hot water was created by heating the water that was passed by the combustion heat of the burner, and it was installed in a hot water supply heat exchanger that supplies the hot water to the hot water supply destination and a recirculation circulation passage that incorporates a circulation pump that circulates bathtub water Simultaneous operation of a motor having a reheating heat exchanger and a plurality of flow path switching valves operated by a motor, and simultaneously operating each motor of two or more flow path switching valves operated by a motor in the operation mode of the apparatus operation In a hot water bath apparatus having a mode, a circuit board for a motor simultaneous operation mode in which a control drive circuit of a motor simultaneous operation mode for controlling and driving the simultaneously operated motor is formed, and the operation of the apparatus other than the motor simultaneous operation mode is controlled. Provided separately from the main control board on which the main control circuit is formed, and the control drive circuit in the motor simultaneous operation mode drives simultaneously. The circuit configuration is such that the driving of a plurality of motors is shifted and the driving is sequentially switched one by one, and the motor-driven power supply that sequentially switches driving one by one is directly controlled from the main control board or remotely from the hot water bath apparatus. A hot water bath apparatus characterized by being configured to be supplied via a remote control.   The hot water supply heat exchanger includes a main heat exchanger that absorbs the sensible heat of the combustion gas by the burner, a latent heat heat exchanger that is provided downstream of the main heat exchanger in the flow of the combustion gas and collects the latent heat of the combustion gas, A drain that stores the drain water generated in the latent heat exchanger, wherein the water supplied from the water supply passage is passed through the latent heat exchanger and then passed through the main heat exchanger to supply hot water. A drain tank discharge passage for discharging drain water in the drain tank and a water supply water supplied from the hot water heat exchanger side or an outlet of a hot water hot water / water supply passage. The circulation pump selectively selects a first switching valve for switching to the inlet of the pump communication passage, an outlet of the pump communication passage, and a passage of a recirculation passage from the bathtub toward the suction port of the circulation pump. of 2. A hot water bath according to claim 1, further comprising a second switching valve that switches to the inlet, and the flow path switching valve that is operated simultaneously by the motor is the first and second switching valves. apparatus.   At the start of the drainage operation mode in which drainage is drained from the drain tank, the motor of the second switching valve is first operated to switch the outlet of the pump communication passage to the water supply side of the circulation pump, and then the first Switch the motor of each switching valve in the order of the second switching valve and the first switching valve, such as switching the motor of the switching valve to switch the outlet of the drain tank discharge path to the inlet of the pump communication passage. The hot-water bath apparatus according to claim 2.

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