JP2018031216A - Hot and cold water mixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower costs when installing a plurality of hot and cold water mixing devices each comprising one or a plurality of control valves 16, 17 for tapping hot water obtained by mixing high-temperature water and low-temperature water and a control part 18 for determining whether to perform a hot water tapping operation on the basis of predetermined control parameters and performing operation control over the control valves 16, 17 to tap the hot water when it is determined that the hot water tapping operation is performed.SOLUTION: Control parts 18 of a plurality of hot and cold water mixing devices 1 are communicably connected by a simple communication circuit, so that a control part 18 in a master operation mode is operated while making a control part 18 in a slave operation mode be subordinate to it, and so that the respective control parts 18 can control hot water tapping operations individually by letting one control part 18 transmit various kinds of pieces of information from a common remote controller 21 and a water level sensor 31 to the other control part 18.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hot and cold water mixing device for adjusting the temperature by mixing low temperature water with high temperature water supplied from a separate heat source machine such as a connected hot water supply system and discharging hot water to a bathtub or the like.

  In the following Patent Document 1, a hot water supply valve is provided in a high temperature water supply pipe for supplying high temperature water (hot spring water) to the bathtub, and a low temperature water supply pipe for supplying low temperature water (cold water) to the bathtub. A cold water valve is provided on the road, and when the temperature of the hot water is detected by a bathtub hot water temperature sensor provided in the bathtub, the hot spring water valve is opened to raise the temperature by supplying high temperature water to the bathtub, and provided in the bathtub There has been disclosed a fully automatic flow-through apparatus configured to open a hot spring water valve and a cold water valve to supply hot water of an appropriate temperature to a bathtub when a water level drop is detected by a water level sensor.

  In this fully automatic apparatus, hot water is directly supplied to the bathtub when the bath water temperature drops, so there is a possibility that the bather may directly touch the hot water. However, the supply pressure of high-temperature water and the supply pressure of low-temperature water fluctuate depending on various situations. Since the flow rate is also unstable, it is difficult to always supply hot water conditioned at an optimum temperature to the bathtub.

  Patent Document 2 below discloses a high-temperature water supply pipe (10) for supplying high-temperature water (hot spring water) to the mixing valve (50) and low-temperature water for supplying low-temperature water to the mixing valve (50). A supply pipe (20), a mixing valve (50) that mixes high-temperature water and low-temperature water supplied by both supply pipes to obtain mixed water at an appropriate temperature, and mixed water mixed by the mixing valve (50) There is disclosed a hot and cold water mixing device provided with a tapping pipe (30) for supplying water to a bathtub or the like.

  The mixing valve is provided with a temperature sensing means made of a bimetallic coil member that deforms in response to a change in the temperature of the mixed water, and is provided with high-temperature water and low-temperature water according to the deformation amount of the temperature-sensing means. The mixing ratio is adjusted to a predetermined temperature, and the temperature setting means is rotated by rotating the handle so that the set temperature of the mixed water can be adjusted manually. .

  According to the hot water mixing apparatus described in Patent Document 2, the mixing ratio of the high temperature water and the low temperature water is automatically adjusted so that the temperature of the mixed water becomes a predetermined temperature by the temperature sensing means that deforms according to the temperature change of the mixed water. Therefore, it is possible to always supply hot water with appropriate temperature to the bathtub.

JP 2008-100018 A JP 2003-213742 A

  In the hot and cold water mixing apparatus described in Patent Document 2, it is necessary to set the temperature of the mixed water by manually rotating the handle. Therefore, in order to change the set temperature, an operator can go to the equipment room where the handle is installed. There is a need to go and it is complicated.

  Therefore, the control unit controls the supply / stop of the high-temperature water and the low-temperature water as in the fully automatic apparatus described in Patent Document 1, and further controls the flow rates of the high-temperature water and the low-temperature water based on the temperature of the mixed water. It is preferable that the feedback control be adopted.

  By the way, when bathtub capacity is large with respect to the mixed water supply capability of a hot and cold water mixing apparatus, it may be required to install a plurality of hot and cold water mixing apparatuses. However, in order for each of the plurality of hot water / water mixing devices to perform the hot water control as described above, it is necessary to provide a remote controller or a water level sensor for each hot water / water mixing device, which causes a problem that the equipment cost increases.

  Therefore, an object of the present invention is to reduce the cost when installing a plurality of hot and cold water mixing devices that discharge mixed water obtained by mixing high-temperature water and low-temperature water by predetermined hot-water operation control.

  In order to achieve the above object, the present invention takes the following technical means.

  That is, the present invention includes one or a plurality of control valves for discharging hot water mixed with high-temperature water supplied from a separate heat source unit and low-temperature water supplied from a predetermined water source, In the hot and cold water mixing apparatus comprising: a control unit that determines whether or not to perform the hot water operation based on the control parameter and that controls the operation of the control valve to perform the hot water operation when it is determined to perform the hot water operation. The unit is configured to be able to communicate information based on the control parameter with a control unit of another hot and cold water mixing device (claim 1).

  According to the hot and cold water mixing apparatus of the present invention, the control unit that performs the hot water operation control can communicate with the control unit of the other hot water and water mixing apparatus. Command information for subordinate the control unit of the hot water mixing device to perform the same operation control, or the control unit of one hot water mixing device determines the hot water operation in the other hot water mixing device and the control unit of the other hot water mixing device Command information for controlling the hot water operation, and control parameters and various setting information necessary to determine whether other hot water mixing devices independently perform the hot water operation. Information based on the control parameter (including the control parameter itself) can be transmitted and received from the control unit of one hot water / water mixing device to the control unit of another hot water / water mixing device, thereby acquiring the control parameter. It is possible to share a remote controller for setting a seed sensor and various setting information in the Ichinoyu water mixing device and the other hot and cold water mixing device, the cost can be reduced as a whole system.

  Note that the configuration for realizing communication between the control units may be appropriate, but when the control unit is mainly configured by a microprocessor having an input / output port, the microprocessor of one control unit A configuration in which an output port and an input port of a microprocessor of another control unit are connected so that signals can be transmitted from one control unit to another control unit. More specifically, for example, a simple switching circuit or a communication line is used. The mounting cost can be suppressed by adopting a configuration in which the two are connected. More preferably, in order to enable bidirectional communication, the output port of the microprocessor of another control unit and the input port of the microprocessor of one control unit can be similarly connected.

  In the hot and cold water mixing apparatus of the present invention, the control unit may selectively switch the operation mode between a master operation mode and a slave operation mode (Claims 2 and 3). For example, if a remote control or a water level sensor is connected to the control unit, it can be automatically switched to the master operation mode, and if it is not connected, it can be configured to be automatically switched to the slave operation mode. The operation mode may be manually selected by manually switching a dip switch, an operation mode setting flag in the memory, or the like.

  Although the control configuration in the master operation mode may be appropriate, for example, in the master operation mode, it is determined whether or not to perform the hot water operation in the own hot water mixing apparatus based on the control parameter, and It may be configured to transmit a hot water operation command (information based on control parameters) to a control unit of another hot water / water mixing device by communication so that the hot water / water mixing device performs the hot water operation in synchronization with the hot water operation. (Claim 2).

  Further, in the master operation mode, it is determined whether or not the hot water mixing operation is performed in the self hot water mixing device based on the control parameter, and whether or not the hot water discharging operation is performed in the other hot water mixing device is also determined. When it is determined that the hot water operation is performed in the mixing device, a hot water operation command (information based on the control parameters) is transmitted by communication to the control unit of the other hot water mixing device so that the other hot water mixing device performs the hot water operation. (Claim 3).

  On the other hand, in the slave operation mode, the control valve can be controlled to operate according to the tapping operation command received by communication with the control unit of another hot water mixing apparatus without performing the determination based on the control parameter. Item 2, 3).

  As described above, the operation mode can be switched between the master operation mode and the slave operation mode, so that the hot water mixing device functioning as the master side and the hot water mixing device functioning as the slave side can be combined with hot water having a common device configuration. It is possible to configure a system using a mixing device, and it is possible to increase the cost reduction effect by mass production by sharing the product configuration, and to simplify inventory management and repair correspondence.

  Furthermore, when it is set as the structure which also performs the hot water operation determination in another hot water mixing apparatus at the time of a master operation mode, the said control part carries out either one of its own hot water mixing apparatus and another hot water mixing apparatus at the time of a master operation mode. A hot water discharge operation can be selectively performed (claim 4). Such a configuration is particularly useful when controlling the hot water operation when a large flow rate is not required, such as when adding hot water to the bathtub (replenishing water operation), and one of the hot water mixing device and the other hot water mixing device is used. By selectively performing a hot water discharge operation, the plurality of hot and cold water mixing devices are alternately used, thereby greatly improving the service life of the entire system.

  Further, the control unit is configured to be communicably connected to a remote controller for performing a predetermined operation such as an operation for starting operation or an operation for changing a set temperature, and operates in a master operation mode when the remote controller is connected, If the remote control is not connected, it may be configured to operate in the slave operation mode. According to this, the controller of the two hot water mixing devices is connected to communicate with each other, and the controller connected to the remote control is connected to only the controller of the hot water mixing device to be operated as a master. The operation mode is automatically selected to operate in the mode, and the operation mode is automatically selected so that the control unit not connected to the remote controller operates in the slave operation mode, so there is no need to switch the operation mode separately. Therefore, it is possible to prevent the occurrence of problems due to erroneous setting of the operation mode.

  Further, the control unit is configured to be communicably connected to a third control unit that performs operation control of a predetermined external device based on the control parameter, and transmits the control parameter to the third control unit by communication. (Claim 6). Specifically, for example, the external device may be a filter that circulates and filters hot water in the bathtub, and the third control unit is a control built in the filter to control the filtering operation. Part. Moreover, as a control parameter, it can be set as the detected value of the water level sensor etc. which were attached to the bathtub, for example, The control part of a filter determines whether filtration operation is performed based on the detected value of a water level sensor. It can be configured as follows. According to this, the control unit of the hot and cold water mixing device acquires from the control parameter acquisition means such as a water level sensor connected to the control unit of the hot and cold water mixing device in order to control the hot water operation such as hot water adding operation and adding hot water operation to the bathtub. By transmitting the control parameter to the third control unit, it is not necessary to provide a separate control parameter acquisition unit for the third control unit to control the operation of the external device, thereby simplifying the system configuration and reducing the cost. Can be planned.

  The hot and cold water mixing apparatus of the present invention includes a flow rate control valve as the control valve, and the temperature of the mixed water can be adjusted by adjusting the mixing ratio of high temperature water and low temperature water by adjusting the opening degree of the flow rate control valve. It may be configured. Further, the control unit is configured to control the opening degree of the flow rate control valve based on predetermined set temperature information in the master operation mode, and to the control unit of another hot water / water mixing device, the setting is performed. It is configured to transmit temperature information by communication, and may be configured to perform opening control of the flow rate control valve based on the set temperature information received from the control unit of another hot water / water mixing device in the slave operation mode. (Claim 7). According to this, for example, based on the set temperature information set by the operation of the remote controller connected to the control unit of the hot and cold water mixing device operating in the master operation mode, the flow rate control is performed so that the hot water temperature becomes the set temperature. By controlling the opening of the valve, the hot and cold water mixing device operating in the master operation mode can discharge the mixed water adjusted to the set temperature. Further, the hot water / water mixing device operating in the slave operation mode is also controlled by the flow rate control valve so that the hot water temperature becomes the set temperature based on the set temperature information received through communication with the control unit of the hot / water mixing device operating in the master operation mode. By controlling the opening degree, the hot and cold water mixing device that operates in the slave operation mode can also discharge mixed water adjusted to the set temperature. In this way, the hot water temperature setting of the two hot water mixing devices can be collectively performed on the master side, and the work amount of the temperature setting operation can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the cost reduction at the time of installing the multiple hot water mixing apparatus which discharges the mixed water formed by mixing high temperature water and low temperature water by predetermined | prescribed hot water operation control can be aimed at.

It is a simplified system block diagram at the time of installing the multiple hot water mixing apparatus which concerns on one Embodiment of this invention. It is an operation principle figure of the hot water mixing device.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

  FIG. 1 schematically shows a makeup water system configuration when two hot water mixing apparatuses 1 according to an embodiment of the present invention are installed, and the makeup water system is a heat source installed in a separate body (not shown). Hot water supplied from a hot water supply system as a machine (preferably, a connected hot water supply system formed by connecting a plurality of water heaters), and low-temperature water (such as non-heated water at normal temperature) supplied from a water source such as waterworks Is mixed in each hot water / water mixing device 1 to adjust the temperature, and the mixed water is discharged into a water tank such as the bathtub 3.

  Each hot water / water mixing device 1 is provided with a mixed hot water circuit for discharging mixed water obtained by mixing high-temperature water and low-temperature water. For example, a hot water supply system 12 supplied with hot water at 80 ° C., a hot water supply line 12 supplied with low temperature water at 20 ° C., for example, and a hot water supply line 13 between the hot water supply pipe 12 and the hot water supply pipe 11. Are provided with three high-temperature water supply pipelines 14 provided in parallel, and three low-temperature water supply pipelines 15 provided in parallel between the incoming water pipeline 13 and the outlet hot water pipeline 11. The outlet hot water pipe 11, the hot water inlet pipe 12 and the incoming water pipe 13 are arranged so that their pipe axis directions are substantially parallel, and the hot water outlet pipe 11 is disposed at an intermediate position between the hot water inlet pipe 12 and the incoming water pipe 13. Has been.

  The tapping pipe 11 is provided with three mixing portions 11a that are spaced apart from each other in the pipe axis direction. One high-temperature water supply line 14 and one low-temperature water supply line 15 are provided for each mixing portion 11a. Are connected to each other. A pair of high-temperature water supply pipes 14 and low-temperature water supply pipes 15 connected to each mixing unit 11a are provided to face each other in the diametrical direction of the tapping water pipe 11, and from each of the supply pipes 14 and 15 The supplied high-temperature water and low-temperature water are agitated and mixed in the mixing section 11a.

  Each high temperature water supply line 14 connects the hot water supply line 12 and the hot water supply line 11 so that the high temperature water in the hot water supply line 12 is supplied to the hot water discharge line 11 by the hot water supply pressure from the hot water supply system. The plurality of high-temperature water supply pipes 14 are provided in parallel with the hot water discharge pipe 11 in the pipe axis direction. The hot water supply system may supply high-temperature water using the water supply pressure of the water source.

  Each low temperature water supply line 15 connects the incoming water line 13 and the outgoing hot water line 11 so that the low temperature water in the incoming water line 13 is supplied to the outgoing hot water line 11 by the feed water pressure of the water source. The low-temperature water supply pipeline 15 is provided in parallel with the tap water pipeline 11 along the pipe axis direction. In addition, when the hot water supply pressure depends on the water supply pressure of the water source, in order to adjust the supply pressure of the low temperature water in accordance with the pressure loss in the hot water supply system, the water supply pipe is connected from the water source through a predetermined governor (pressure regulator). It is preferable that low temperature water is supplied to the channel 13.

  In addition, the pipe diameter (bore diameter) of the hot water outlet pipe 11 is larger than each pipe diameter of the hot water inlet pipe 12 and the incoming water pipe 13, and is about twice as large as the cross-sectional area of the flow path. The pipe diameter of the hot water inlet pipe 12 and the pipe diameter of the incoming water pipe 13 are made equal. Moreover, the pipe diameters of the high-temperature water supply pipes 14 and the low-temperature water supply pipes 15 are smaller than the pipe diameters of the hot water supply pipe 12 and the water inlet pipe 13, and these supply pipes 14 and 15 have a relatively small diameter. It is composed of piping. For example, the pipe diameters of the supply pipes 14 and 15 may be the same pipe diameter as the pipe used in a general domestic instantaneous water heater.

  Each of the high temperature water supply pipes 14 and each of the low temperature water supply pipes 15 has a flow rate control valve 16 (first control valve) and an electromagnetic on-off valve 17 (second control valve) corresponding to the pipe diameters, respectively. It is provided in series. In the illustrated embodiment, the electromagnetic on-off valve 17 is disposed on the upstream side (the hot water inlet line 12 or the incoming water line 13 side), and the flow control valve 16 is disposed on the downstream side (the hot water outlet line 11 side). The flow rate control valve 16 and the electromagnetic on-off valve 17 are connected by wiring so that their operations are controlled by a control board 18 (control unit).

  The flow rate control valve 16 is configured such that the opening degree can be adjusted from fully closed to fully open by driving a valve shaft (not shown) by a stepping motor M that is driven and controlled by a control board 18, and the valve shaft is fully closed. Then, a predetermined fully closed state signal is output to the control board 18, and a predetermined fully open state signal is output to the control board 18 when the valve shaft is in the fully open position. In addition, the control step value of each stepping motor M can be corrected based on the fully open state signal or the fully closed state signal at a predetermined timing such as at the start of the hot water operation.

  In addition, the tapping pipe 11 is provided with a tapping thermistor 19 (temperature sensor) on the downstream side (tapping outlet side) with respect to the three mixing portions 11 a, and detects the temperature of the mixed water flowing through the tapping pipe 11. The detected value is output to the control board 18. In the illustrated example, two tapping thermistors 19 are attached at two locations in the diametrical direction of the tapping pipe 11. The two detected values of the two hot water thermistors 19 can be used for various purposes. For example, the average value of the detected values of the two hot water thermistors 19 is used as the temperature of the mixed water, or one hot water thermistor 19 is used as the main hot water supply temperature. The other hot water thermistor 19 can be used as a sensor for high temperature detection at the time of main failure, and can be designed as appropriate according to required functions, safety, and the like.

  In the figure, reference numeral 12a denotes a hot water thermistor (temperature sensor) for detecting the temperature of the hot water, and reference numeral 13a denotes a hot water thermistor (temperature sensor) for detecting the temperature of the low temperature water. The detected values of the hot water thermistor 12a and the hot water thermistor 13a. Is output to the control board 18.

  The control board 18 is connected to a communication circuit 20 for performing communication using a predetermined communication protocol, and can communicate with other devices corresponding to the communication protocol via the communication circuit 20. The communication circuit 20 can be configured by a two-core communication circuit that supplies serial power, for example, with two cores and performs serial communication by superimposing communication data on a power supply voltage.

  Further, the control board 18 includes an output port Out and an input port In for communicating with the control board 18 of another hot water / water mixing apparatus 1. When the control board 18 is mainly composed of a microprocessor, the output port Out and the input port In can be configured by the input / output ports of the microprocessor, or the input / output of the microprocessor can be performed through a simple switching circuit. It can also be configured such that signals are input and output from the output port Out and the input port In.

  As shown in FIG. 1, the output port Out of the control board 18 of one hot water mixing apparatus 1 is connected to the input port In of the control board 18 of another hot water mixing apparatus 1 and is connected to one hot water mixing apparatus. The input port In of one control board 18 is connected to the output port Out of the control board 18 of another hot water / water mixing apparatus 1 by wiring, so that the control boards 18 are communicably connected to each other. The communication between the control boards 18 can be performed by, for example, simple serial communication.

  In addition, a water level sensor 31 is attached to the bathtub 3 so that the detected water level of the hot water in the bathtub 3 can be output to the control board 18. As the water level sensor 31, an appropriate detection type such as a pressure type or an electrode type can be adopted. Although the water level sensor 31 can be directly connected to the analog signal input port of the control board 18, in the illustrated embodiment, a water level detection unit 33 with a built-in microcomputer is attached to the bathtub 3, and the water level sensor 31 is connected to the water level detection unit 33. It is connected. The water level detection unit 33 is communicably connected to the control board 18 of one hot water mixing apparatus 1 via the two-core communication circuit 20, and the water level is detected via the water level detection unit 33 and the two-core communication circuit 20. The detection value is acquired by the control board 18. By comprising in this way, even when the installation position of the bathtub 3 is away from the one hot water / mixer 1, the possibility of erroneous detection of the water level due to noise mixing in the connection wiring can be reduced.

  Moreover, the filter 32 (external apparatus) for circulating and filtering the hot water in the bathtub 3 is installed. The filter 32 incorporates a third control unit (not shown) for controlling the operation of the filter 32, and the third control unit has a predetermined water level detected in the bathtub 3. The filter 32 is started when the machine start water level L3 is exceeded, and the filter 32 can be stopped when it falls below a predetermined filter stop water level L4 lower than the filter start water level L3. This filter 32 is also communicably connected to the control board 18 of the hot water mixing apparatus 1 via the two-core communication circuit 20, and can transmit and receive predetermined information such as a water level detection value of the water level sensor 31 by communication. Has been made. In addition, the filter 32 can have a reheating function and a chlorine concentration management function.

  Further, a filter remote controller 34 is connected to the filter 32, and the start / stop of the operation of the filter 32 can be operated by the filter remote controller 34. Further, the operation command of the filter remote controller 34 is sent via the two-core communication circuit 20 so that the operation of the filter remote controller 34 is started / stopped in conjunction with the operation start / stop operation of the filter remote controller 34. Is transmitted to the control unit 18 of one hot water / water mixing device 1, and further starts operation from the control unit 18 of one hot water / water mixing device 1 to the control unit 18 of another hot water / water mixing device 1 via the input / output ports Out, In. A stop signal can be transmitted and received.

  A makeup water remote controller 21 is communicably connected to the control board 18 of the hot water mixing apparatus 1 via the two-core communication circuit 18, and the remote controller 21 performs a makeup water operation start / stop operation, Various operations such as setting the temperature of the hot water to the bathtub 3, controlling the hot water operation to the bathtub 3 and starting the hot water operation control can be performed.

  The control board 18 is configured such that the operation mode is switched to the master operation mode when the remote control 21 is connected, and the operation mode is switched to the slave operation mode when the remote control 21 is not connected. The control board 18 of the hot water mixing apparatus 1 operates in the master operation mode, and the control board 18 of the right hot water mixing apparatus 1 operates in the slave operation mode.

  When the hot water temperature setting operation is performed by the remote controller 21, the set temperature information is transmitted to the control board 18 operating in the master operation mode, and the control board 18 stores and holds the set temperature in a storage means such as a nonvolatile memory. The set temperature information is transmitted to the control board 18 of the other hot and cold water mixing apparatus 1 through the input / output ports Out, In. The control board 18 of the other hot water / water mixing apparatus 1 also stores the received set temperature information in a storage means such as a nonvolatile memory.

  Further, when a hot water operation start operation to the bathtub 3 is performed by the remote controller 21, a hot water operation command signal is transmitted to the control board 18 operating in the master operation mode. When receiving the hot water operation command signal, the control board 18 in the master operation mode starts the hot water supply to the bathtub 3 by the hot water operation control (first operation control). When the control board 18 detects that the detected water level (first control parameter) in the bathtub 3 has reached the set water level L1 (second control parameter), the hot water operation control (second operation control) is automatically performed. In order to maintain the set water level L1 in the water level in the bathtub 3, the hot water discharged to the bathtub 3 is intermittently or continuously performed. For example, the hot water operation can be stopped when the set water level L1 (replenishment stop water level) is exceeded, and the hot water operation can be started when it falls below a predetermined refill water start water level L2 lower than the set water level L1.

  Further, the control board 18 in the master operation mode performs the hot water supply to the control board 18 of the other hot water mixing apparatus 1 in synchronism with its own hot water operation when performing the hot water operation based on the detected water level in the bathtub 3 as described above. Similarly, when a hot water operation command is transmitted to the control board 18 in the slave operation mode of another hot water mixing apparatus via the input / output ports Out, In so as to perform the operation, and the hot water operation is stopped. A hot water stop command is transmitted to the control board 18 in the other slave operation mode via the input / output ports Out, In.

Hereinafter, the control structure of the hot water operation control and the additional hot water operation control by the control board 18 will be described.
[Hot water motion control]

  At the time of hot water operation control, the control board 18 in the master operation mode controls all the electromagnetic on-off valves 17 provided in all the high-temperature water supply pipes 14 and all the low-temperature water supply pipes 15 of the single hot water / mixer 1. In addition to the opening control, the control is configured to feedback control the opening degree of all the flow control valves 16 so that the detection value of the hot water thermistor 19 becomes the set temperature.

  Further, the control board 18 in the master operation mode is configured to transmit a hot water operation command for performing the same hot water operation to the control board 18 in the slave operation mode at the start of hot water operation control. The control board 18 in the slave operation mode sets all the electromagnetic on-off valves 17 provided in all the high-temperature water supply pipes 14 and all the low-temperature water supply pipes 15 of the other hot-water mixing apparatuses 1 in accordance with the tapping operation command. In addition to the opening control, the openings of all the flow control valves 16 are feedback-controlled so that the detection value of the hot water thermistor 19 becomes the set temperature.

  In addition, in order to shorten the convergence time of the hot water supply temperature at the beginning of the hot water supply operation, the initial value of the opening of each flow control valve 16 is obtained by calculation based on the detected values of the hot water thermistor 12a and the hot water thermistor 13a. The control can be configured to perform feedback control based on the detection value of the thermistor 19.

Although the opening degree control method of the plurality of flow control valves 16 on each control board 18 may be an appropriate one, in this embodiment, all the high-temperature water supplies used for supplying high-temperature water to the tapping pipe 11 are provided. The plurality of high temperature side flow control valves 16 provided in the pipe line 14 are synchronously controlled so as to have the same opening degree, and all the low temperature water supply pipes 15 used for supplying the low temperature water to the tapping pipe line 11 are provided. The plurality of low temperature side flow control valves 16 provided are synchronously controlled so as to have the same opening degree. More specifically, a control signal based on the same high temperature side control step value is output to the stepping motors M of the plurality of high temperature side flow control valves 16 and the same low temperature side is supplied to the stepping motors M of the plurality of low temperature side flow control valves 16. A control signal based on the control step value is output. The opening control of the flow rate control valve 16 can be independently performed on the control board 18 in the master operation mode and the control board 18 in the slave operation mode.
[Additional hot water operation control]

  At the time of adding hot water operation control, it is possible to synchronize the hot water operation on the control board 18 in the slave operation mode with the hot water operation on the control board 18 in the master operation mode (synchronous control). It is also possible to control the open / close operation of all the electromagnetic open / close valves 17 of the two hot water / water mixing devices 1 so as to transmit the hot water operation command to the control board 18 in the slave operation mode (centralized control).

  (For synchronous control)

  In the case of synchronous control, the control board 18 in the master operation mode includes a pair of high temperature water supply pipes 14 connected to any one (or a plurality of) mixing units 11a of the hot water mixing apparatus 1 and a low temperature. Only the water supply line 15 is selected and used, and it is determined that the paired high-temperature water supply line 14 and low-temperature water supply line 15 connected to the other mixing unit 11a are not used. It is possible to appropriately design which pair of supply lines 14 and 15 is used, and one hot water / water mixing device at a predetermined cycle such as every day or every week, or at a predetermined timing such as every time the addition hot water operation control is activated. It is possible to rotate which one of the three pairs of supply lines 14 and 15 is used.

  And about the supply pipelines 14 and 15 to be utilized, while performing the water replenishment operation | movement to a bathtub, while opening-controlling the electromagnetic on-off valve 17 of these supply pipelines 14 and 15, the flow control valve 16 of these supply pipelines 14 and 15 The opening is controlled by the same control method as the opening control during hot water operation control. On the other hand, for the supply lines 14 and 15 that are not used, the electromagnetic on-off valve 17 of the supply lines 14 and 15 is closed and the flow control valve 16 of the supply lines 14 and 15 is fully closed. Thus, the outflow of hot water from the unused supply pipelines 14 and 15 is reliably prevented, and hot water and cold water are supplied only from the pair of high temperature water supply pipelines 14 and the low temperature water supply pipeline 5, The water replenishment operation at the time of hot water operation control can be performed with a hot water supply flow rate smaller than that at the time of beam operation control.

  In addition, the control unit 18 in the master operation mode allows the hot water to be discharged from the pair of supply pipes 14 and 15 of another hot water mixing apparatus 1 at the same position as the supply pipes 14 and 15 used for hot water. A tapping operation command is transmitted to the control unit 18 together with command information for designating the supply pipelines 14 and 15 to be used. The control unit 18 in the slave operation mode that has received the hot water operation command is configured to perform a similar water replenishment operation using the specified pair of supply pipelines 14 and 15. In addition, the water refill operation end determination in the control unit 18 in the slave operation mode may be independently performed by the control unit 18 in the slave operation mode based on the water level detection information in the bathtub supplied from the control unit 18 in the master operation mode. Moreover, it can also comprise so that a hot water operation stop command may be received from the control part 18 of a master operation mode.

  (In the case of centralized control)

  In the case of centralized control, the control board 18 in the master operation mode determines whether or not to perform the hot water operation in its own hot water / water mixing device 1 based on the water level detection information of the water level sensor 31 and the set water level information L1 and L2 (control parameters). It is also determined whether or not the other hot water mixing apparatus 1 performs the hot water operation. When it is determined that the other hot water mixing apparatus 1 performs the hot water operation, the other hot water mixing apparatus 1 is caused to perform the hot water operation. It is configured to transmit a hot water operation command to the control board 18 of another hot water / mixer 1 by communication.

  That is, the control board 18 in the master operation mode selects any one of the six pairs of supply pipes 14 and 15 included in the two hot water mixing apparatuses 1 and uses it for the hot water, and the other supply pipes 14. , 15 are determined not to be used. The pair of supply lines 14 and 15 to be used can be designed as appropriate, and the two hot water and water mixing devices can be designed at predetermined timings such as every day or every week, or every time the additional hot water operation control is activated. It is possible to rotate which one of the six pairs of supply lines 14 and 15 is used.

And when the supply pipelines 14 and 15 determined to be used are included in the other hot water / water mixing devices 1, it is determined to be used for the control board 18 of the other hot water / water mixing devices 1. A hot water operation command for performing the hot water operation using the supply pipelines 14 and 15 is transmitted. When each control board 18 performs a hot water discharge operation using the supply pipes 14 and 15 included in its own hot and cold water mixing device 1, the control board 18 controls to open the electromagnetic on-off valve 17 of the supply pipes 14 and 15. The opening control of the flow rate control valves 16 of the supply pipelines 14 and 15 is performed by the same control method as the opening control during hot water operation control. On the other hand, for the supply lines 14 and 15 that are not used, the electromagnetic on-off valve 17 of the supply lines 14 and 15 is closed and the flow control valve 16 of the supply lines 14 and 15 is fully closed.
(Abnormality judgment control)

  In addition, each control board 18 makes an abnormality determination of each flow control valve 16 and the electromagnetic on-off valve 17 at a predetermined timing, so that the supply lines 14 and 15 in which the abnormality has occurred are reset until repaired. The control is configured so that it is not used during hot water operation control and during hot water operation control. Further, when the control board 18 in the slave operation mode detects an abnormality in the supply pipes 14 and 15 included in the own hot water / water mixing device 1, the abnormality information is transmitted to the control board 18 in the master operation mode, It can be determined not to use the supply pipes 14 and 15 of the other hot and cold water mixing devices 1 in which an abnormality has occurred in the hot water operation control by the control board 18 in the master operation mode. If an abnormality occurs on the high-temperature water supply pipeline 14 side, the control structure is configured not to use the low-temperature water supply pipeline 15 paired therewith, or if an abnormality occurs on the low-temperature water supply pipeline 15 side, The control structure can be configured not to use the paired high-temperature water supply pipe 14. According to this, the balance between the maximum flow rate of the high-temperature water and the maximum flow rate of the low-temperature water is maintained, and the temperature adjustment control of the mixed water is performed. Stability can be improved.

  An abnormality determination method may be appropriate. For example, when the addition hot water operation control is started, an abnormality determination process for the flow control valve 16 and the electromagnetic opening / closing valve 17 provided in the pair of supply pipes 14 and 15 to be used. It can be performed.

  As an abnormality determination method for each flow control valve 16, for example, a full open state signal is output when the fully open operation control is performed with the electromagnetic on-off valve 17 provided in series closed, and the full close operation control is performed when the full close operation control is performed. If a closed state signal is output, it is determined that the signal is normal, and if any signal is not output, it can be determined that an abnormality has occurred.

  Further, as a method for determining the abnormality of the electromagnetic open / close valve 17, for example, the pair of electromagnetic open / close valves 17 are simultaneously controlled to open / close while the flow control valves 16 on the high temperature side and the low temperature side are set to a predetermined opening (for example, fully open). Then, the temperature detected by the hot water thermistor 19 when both the electromagnetic on-off valves 17 are controlled to open is within a predetermined temperature range (for example, within a range of ± 10 ° C. centering on the average value of the temperature of the high temperature water and the temperature of the low temperature water). If the detected temperature is substantially the temperature of the high temperature water, it is determined that the low temperature side electromagnetic on-off valve 17 is closed and stuck. If it is determined that the electromagnetic on-off valve 17 is closed and stuck, and the detected temperature is higher than a predetermined high temperature (for example, 100 ° C. or higher), the hot water thermistor 19 is self-heated due to the absence of water flow and becomes high temperature. It is estimated that both electromagnetic on-off valves 17 It can be determined to be abnormal (or water outage). Further, if the detected temperature of the hot water thermistor 19 when the both solenoid on-off valves 17 are controlled to be closed is determined to be normal if the detected temperature is equal to or higher than a predetermined high temperature, and if the detected temperature is substantially the temperature of high-temperature water, the high-temperature side electromagnetic If it is determined that the open / close failure of the on-off valve 17 is detected, and the detected temperature is substantially the temperature of the low-temperature water, it can be determined that the open / close failure of the electromagnetic open / close valve 17 on the low temperature side.

  According to the hot and cold water mixing apparatus according to the present embodiment described above, various information supplied from the makeup water remote controller 21 and the water level detection information of the water level sensor 31 are transferred from the control board 18 in the master operation mode to the control board 18 in the slave operation mode. Therefore, there is no need to provide a remote controller or a water level sensor for each hot water / water mixing device 1, and a single makeup water remote controller 21 and a single water level sensor 31 are shared by a plurality of hot water / water mixing devices 1. It is possible to accurately perform the hot water application operation and the hot water operation to No. 3.

  The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate. For example, in the above embodiment, the control board 18 of the other hot water / water mixing device 1 is operated in the slave operation mode, but the detected water level information and the set water level information in the bathtub 3 necessary for determining whether or not to pour out the hot water, etc. The controller 18 of one hot water / mixer 1 transmits the data to the controller 18 of another hot water / mixer 1 by communication, and determines whether the control board 18 of the other hot water / mixer 1 also discharges the hot water independently. It is also possible to configure so that the hot water is discharged.

  In the above embodiment, the control board 18 is configured to be selectively switchable between the master operation mode and the slave operation mode. However, the control board 18 of one hot water / water mixing device 1 is configured exclusively for the master operation mode, and the others. The control board 18 of the hot / cold water mixing device 1 can also be configured exclusively for the slave operation mode.

  Further, although the flow control valve 16 and the electromagnetic opening / closing valve 17 are provided as control valves, each supply pipeline 14 is provided only by the closing function of the flow control valve 16 without providing the electromagnetic opening / closing valve 17 of each supply pipeline 14, 15. , 15 can be configured to open and close. If the electromagnetic opening / closing valve 17 is provided, a flow control valve 16 having no closing function may be used. Further, a plurality of hot and cold water mixing devices 1 that are operated in the slave operation mode may be provided.

1 Hot and cold water mixing device 16 Flow control valve (control valve)
17 Electromagnetic on-off valve (control valve)
18 Control unit (control board)
21 Remote control (replenishment water remote control)
31 Water level sensor 32 Filtration machine (external equipment)

Claims (7)

One or a plurality of control valves for tapping mixed water formed by mixing high temperature water supplied from a separate heat source unit and low temperature water supplied from a predetermined water source, and tapping hot water based on predetermined control parameters In a hot and cold water mixing device comprising a control unit that controls the operation of the control valve to perform a hot water operation when it is determined whether or not to perform an operation and a hot water operation is performed.
The said control part is comprised so that communication based on the said control parameter is communicable between the control parts of another hot water mixing apparatus, The hot water mixing apparatus characterized by the above-mentioned. In the hot and cold water mixing apparatus according to claim 1,
The controller is
The operation mode can be selectively switched between the master operation mode and the slave operation mode,
In the master operation mode, it is determined whether or not the hot water mixing apparatus performs the hot water operation based on the control parameter, and other hot water mixing apparatuses perform the hot water operation in synchronization with the self hot water operation. Is configured to transmit a hot water operation command as information based on the control parameter to the control unit of the hot water / water mixing device by communication,
In the slave operation mode, the control valve operation control is performed according to the hot water operation command received by communication with the control unit of another hot water mixing apparatus without performing the determination based on the control parameter. A hot and cold water mixing device. In the hot and cold water mixing apparatus according to claim 1 or 2,
The controller is
The operation mode can be selectively switched between the master operation mode and the slave operation mode,
In the master operation mode, based on the control parameter, it is determined whether or not the hot water mixing operation is performed in the self hot water mixing device, and whether or not the hot water mixing operation is performed in the other hot water mixing device is also determined. When it is determined that the hot water operation is to be performed, the hot water operation command as information based on the control parameter is transmitted by communication to the control unit of the other hot water mixing device so that the other hot water mixing device performs the hot water operation. Configured,
In the slave operation mode, the operation control of the control valve is performed according to the tapping operation command received by communication with the control unit of another hot water mixing apparatus without performing the determination based on the control parameter. Hot water mixing device.   4. The hot and cold water mixing apparatus according to claim 3, wherein the control unit is configured to selectively discharge one of the hot water and water mixing apparatus and another hot water and water mixing apparatus in the master operation mode. A hot and cold water mixing device.   5. The hot and cold water mixing apparatus according to claim 2, 3 or 4, wherein the control unit is configured to be communicably connected to a remote controller for performing a predetermined operation, and operates in a master operation mode when the remote controller is connected. The hot and cold mixing device is configured to operate in a slave operation mode if the remote controller is not connected.   The hot and cold water mixing apparatus according to any one of claims 2 to 5, wherein the control unit is configured to be communicably connected to a third control unit that performs operation control of a predetermined external device based on the control parameter. 3. A hot and cold water mixing apparatus, wherein the control parameter is transmitted to the control unit of 3 by communication. The hot and cold water mixing apparatus according to any one of claims 2 to 6, comprising a flow rate control valve as the control valve, and adjusting a mixing ratio of high temperature water and low temperature water by adjusting an opening degree of the flow rate control valve. The temperature can be adjusted, and
The controller is
In the master operation mode, the opening control of the flow rate control valve is performed based on predetermined set temperature information, and the set temperature information is transmitted by communication to a control unit of another hot and cold water mixing device. Configured and
In the slave operation mode, the opening / closing control of the flow rate control valve is performed based on the set temperature information received from the control unit of another hot water / water mixing device.

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