JP2003139394A - Hot-water/water mixing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize effective and safety use of hot water of a hot-water supplier in a hot-water/water mixing unit connected to an auxiliary heat source even in the case of a failure of the auxiliary heat source or when communication can not be established. SOLUTION: At a controller 11, besides a communication part 111 for communication with the auxiliary heat source 7, an emergency operation part 115 is provided. At the emergency operation part 115, when an abnormality is found in communication contents at the communication part 11, automatic determination that the auxiliary heat source 7 fails is made, an emergency operation command is sent to a mixing control part 112 from an emergency operation command part 118, and mixed water mixed to a mixing set temperature for emergency operation is sent out to a mixed water passage (S1-S3). The temperature of mixed water at the emergency operation is set at a set temperature selection part 116. Thus, even if the auxiliary heat source 7 fails, emergency operation is executed, and hot water by mixed water can be taken out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to connecting a hot water supply device, such as a solar water heater using natural energy or a water heater using waste heat, to an auxiliary heat source device such as a water heater. The hot water mixing unit of the present invention relates to a technology that enables effective and safe use of hot water from a hot water supply device even when the auxiliary heat source device fails or communication with the auxiliary heat source device is not established.

[0002]

2. Description of the Related Art Conventionally, for example, a solar hot water supply system in which a solar water heater serving as a hot water supplier is connected to a water heater serving as an auxiliary heat source by a hot water mixing unit so that the solar hot water from the solar water heater is used. A system is disclosed in Japanese Patent Laid-Open No. 10-47752.

The solar hot water supply system described in this publication is
As shown in FIG. 4, in the hot and cold water mixing unit C, a solar hot water passage 470 connected to the solar water heater B side, a cold water passage 480 connected to the water supply side, and the solar hot water passage 470 and the cold water passage 480 are provided. Mixing water channel 421 joined together and connected to the water heater A side, and the above-mentioned water channels 470, 48
A mixing control valve 461 provided at the confluence of 0,421 for mixing and adjusting the solar hot water (hot water) of the solar hot water channel 470 and the tap water of the cold water channel 480 as mixed water, and the operation control of this mixing control valve 461. The controller 460 controls the hot and cold water mixing unit C itself and has a communication function so as to share information with the hot water supply controller 430 of the water heater A.

As a result, the control information and the temperature information entered into the hot water supply controller 430 from the remote controller 450, sensors and the like are immediately fed to the controller 46 of the hot and cold water mixing unit C.
0, which allows the controller 460 to quickly control the hot and cold water mixing unit C to an appropriate state based on the control information and other information that have been communicated.

In this way, when the hot water mixing unit C is controlled by the controller 460, the control based on the situation on the side of the water heater A can be appropriately and promptly performed.

[0006]

However, if the remote controller 450 cannot be turned on due to some trouble on the side of the water heater A, the set temperature of the water heater cannot be displayed, and in particular, the high temperature warning cannot be displayed. When the water heater A breaks down, the hot water mixing unit C is usually stopped. Therefore, even if sufficient solar hot water is stored in the solar water heater B, the solar hot water cannot be used at all during the failure of the water heater A, which is very inconvenient for the user who wants to use hot water. there were. In addition, the solar water heater B and the hot water mixing unit C cannot use the solar hot water at all even though the solar water heater B is normal, which wastes solar heat energy.

On the other hand, the conventional hot and cold water mixing unit C is
In the first place, since the connection is planned only to the water heaters with which communication is established, it is not possible to connect the hot / water mixing unit C to a water heater or a water heater with a different communication protocol that does not allow normal communication connection. The hot and cold water mixing unit C performs a water fixing operation when it is forcibly connected to the water heater, and even if the solar water heater B has solar hot water, it cannot be used. Further, in order to build a solar hot water supply system, it is irrational to replace the hot water supply device that is normally operating even now with a new water supply device equipped with a communication function, which imposes a heavy burden on the user.

The present invention has been made in view of such circumstances, and in the hot and cold water mixing unit connected to the auxiliary heat source unit, when the auxiliary heat source unit fails or communication with the auxiliary heat source unit is not established. However, it is an issue to make it possible to use the hot water of the hot water supplier effectively and safely.

[0009]

The present invention takes the following solving means in view of the above problems. (1) The hot and cold water mixing unit (claim 1) according to the present invention comprises:
A hot and cold water mixing unit for connecting a hot water supply device to an auxiliary heat source device, wherein hot water from the hot water supply device passing through a hot water passage and water from a water source passing through a cold water passage are mixed and the mixed water after the above is mixed. A mixing controller that sends out to a mixing water channel connected to the water inlet channel of the auxiliary heat source machine, determines the mixing ratio in the mixing controller in response to the hot water supply set temperature in the auxiliary heat source machine, and controls the operation of the mixing controller. It has a mixing control unit to perform and a communication unit having a communication function for transmitting and receiving information to and from the auxiliary heat source device, and automatically determines an abnormality of the auxiliary heat source device from the communication content in the communication unit. In addition, when the auxiliary heat source device is abnormal, it is provided with emergency operation executing means for controlling the mixing control unit to execute the emergency operation in which the mixed water is mixed so as to reach the mixing set temperature for the emergency operation. It is an butterfly.

According to this, if the auxiliary heat source unit fails, communication with the communication unit cannot be normally performed, or the auxiliary heat source unit sends an error code signal for error display to the remote controller or the like, so that communication in the communication unit is not possible. If it is normal or if the communication unit intercepts the error code signal sent to the remote controller, it can be determined that an abnormality has occurred in the auxiliary heat source device. In this way, the abnormality of the auxiliary heat source device can be automatically determined from the communication content of the communication unit. When the tap water tap of the auxiliary heat source device is opened when the auxiliary heat source device is abnormal, the emergency operation executing means operates to execute the emergency operation. Then, the mixed water mixed to the mixed set temperature for the emergency operation is sent out to the mixed water channel. Since this mixed water passage is connected to the water inlet passage of the auxiliary heat source device, hot water by the mixed water is taken out from the tap of the auxiliary heat source device.

(2) The hot and cold water mixing unit according to the present invention (claim 2) is the hot and cold water mixing unit (claim 1).
In the above, the emergency operation executing means is a set temperature selection unit capable of arbitrarily setting the mixed set temperature for the emergency operation, and a determination unit for determining an abnormality of the auxiliary heat source device from the communication content of the communication unit, When the determination unit determines that the auxiliary heat source device is abnormal, the mixed water is mixed so as to reach the mixing set temperature set by the set temperature selection unit, and an emergency operation command is issued to the mixing control unit. It is characterized by having an operation command section.

According to this, when it is determined by the determination unit that an abnormality has occurred in the auxiliary heat source device, then the emergency operation command unit issues an emergency operation instruction to the mixing control unit, and the mixing setting for emergency operation is set. The mixed water mixed to the temperature is sent out to the mixed water channel.

The temperature of the mixed water during the emergency operation is set to the mixed set temperature set by the set temperature selection section. The set temperature selection unit can arbitrarily set the mixed set temperature, so that the user can take out hot water of a desired temperature by using the hot water of the hot water supply device. It is also possible to prevent hot water from being tapped by limiting the upper limit of the setting range in the set temperature selection unit.

(3) The hot and cold water mixing unit according to the present invention (claim 3) is the hot and cold water mixing unit (claim 1).
In the above, the heat generation amount due to the combustion of the auxiliary heat source device is divided by the water amount of the mixed water to obtain an increased temperature, and the rising temperature is subtracted from the hot water supply set temperature of the auxiliary heat source device to set the mixed temperature. And a mixing temperature calculating unit for obtaining the operation temperature, the communication unit further has a reception function of intercepting an operation ON-OFF signal by the remote controller of the auxiliary heat source device,
The emergency operation execution means determines the abnormality of the auxiliary heat source device from the communication content of the communication unit, and the determination unit determines that the auxiliary heat source device is abnormal. In the case of intercepting the above, it is characterized by having an emergency operation command section for instructing the mixing control section to provide an emergency operation instruction in which the mixed water is mixed so as to reach the mixing set temperature obtained by the mixing temperature calculation section. It is what

According to this, even if it is judged from the communication contents in the communication unit that the auxiliary heat source device is abnormal, if the operation ON signal of the remote controller of the auxiliary heat source device is confirmed, the operation of the remote controller is turned on. Since it is included, the auxiliary heat source machine may operate normally in combustion. In this case, since it is considered that only the communication with the auxiliary heat source device is abnormal and the auxiliary heat source device main body is not abnormal, the mixture obtained by subtracting the temperature rise due to combustion of the auxiliary heat source device from the hot water supply set temperature in the auxiliary heat source device. The mixed water is mixed at the set temperature and sent to the auxiliary heat source machine side. The mixed set temperature at this time is obtained by the rising temperature calculation unit and the mixing temperature calculation unit. Then, the above-mentioned mixed water is heated by the combustion operation of the auxiliary heat source device, and the hot water is discharged at the hot water supply set temperature by the remote controller of the auxiliary heat source device.

(4) Further, a hot water mixing unit according to the present invention (claim 4) is a hot water mixing unit for connecting the hot water supply device to the auxiliary heat source device, wherein the hot water supply device passes through the hot water passage. The mixing controller that mixes the hot water and the water from the water source that passes through the cold water passage and sends the mixed water after this to the mixing water passage connected to the inlet water passage of the auxiliary heat source device, and the hot water supply set temperature in the auxiliary heat source device A mixing control unit that receives and determines the mixing ratio in the mixing controller and controls the operation of the mixing controller, and a communication unit that holds a communication function for transmitting and receiving information between the auxiliary heat source unit. And further includes a communication determination unit that determines the presence or absence of communication from the auxiliary heat source device, and a switching selection unit that can set the temperature of the mixed water, and in the communication determination unit from the auxiliary heat source device. Communication When the Most is determined, it said mixing control unit is characterized in that it has a configuration in which mixing control of the mixed water to a temperature and which is set by the switching selection means.

According to this, when the communication discriminating section judges that there is no communication from the auxiliary heat source device, the switch selecting device causes the switch selecting device to perform the switching regardless of the hot water supply set temperature in the auxiliary heat source device. The mixed water of the set temperature will be sent to the auxiliary heat source machine. Then, in the auxiliary heat source device, this mixed water is heated to the hot water supply set temperature, and hot water having the hot water supply set temperature by the remote controller of the auxiliary heat source device or the like is supplied from the hot water outlet or the like.

(5) The hot and cold water mixing unit according to the present invention (claim 5) is the hot and cold water mixing unit (claim 4).
In the above, the switching selection means is also capable of setting a water fixing operation in which hot water of the hot water supply device is not mixed. According to this, if the switching selection means is set to the water fixing operation, the water from the water source will be sent to the auxiliary heat source machine. Therefore, it becomes possible to cope with the case where it is desired to send water instead of mixed water to the auxiliary heat source machine.

(6) Further, in the hot and cold water mixing unit (claim 6) according to the present invention, in the hot and cold water mixing unit (claims 1 to 5), when the mixed water is controlled by the mixing control section, the mixed water is mixed. It is characterized in that a mixed water temperature forced setting means for forcibly setting the temperature to a fixed temperature is provided. According to this, even when the auxiliary heat source device is abnormal or there is no communication with the auxiliary heat source device, the mixed water temperature forced setting means forcibly sends the mixed water to a fixed temperature to the auxiliary heat source device. Becomes Here, the fixed temperature mixed water includes not only hot water obtained by mixing the hot water of the hot water supply device and the water of the water source, but also water fixation of only the water of the water source that does not mix the hot water of the hot water supply device.

[0020]

As described above, according to the hot water mixing unit (Claim 1) of the present invention, even if the auxiliary heat source unit fails, the emergency operation is executed by the operation of the emergency operation executing means to mix water. It is very convenient for users who want to use hot water, because hot water can be taken out. Moreover, since the emergency operation is automatically executed by the emergency operation executing means, the convenience for the user can be further improved. Furthermore, even if the auxiliary heat source cannot be used due to an abnormality such as a failure, hot water can be taken out by using the hot water of the hot water supply device, maximizing the energy saving effect by using natural energy such as solar heat energy and waste heat. Can be demonstrated.

Further, according to the hot and cold water mixing unit of the present invention (claim 2), hot water of a desired temperature can be taken out even during emergency operation, which is very convenient for the user. In addition, safety can be sufficiently ensured by limiting the upper limit of the setting range in the set temperature selection unit so that hot water is not discharged.

Further, according to the hot-water mixing unit according to the present invention (claim 3), even if only the communication with the auxiliary heat source device is abnormal and the auxiliary heat source device main body is normally operated, hot water is supplied. Hot water can be supplied by an emergency operation using the hot water of the feeder.

Further, according to the hot and cold water mixing unit of the present invention (claim 4), even if the hot water mixing device is connected to the auxiliary heat source device in which communication is not established, the mixed water having the temperature set by the switching selecting means is used as the auxiliary heat source device. Therefore, the hot water of the hot water supplier can be effectively and safely used. Also,
It is not necessary to replace the auxiliary heat source device with a communication function, and it is possible to easily realize a hot water supply system.

Further, according to the hot and cold water mixing unit (Claim 5) of the present invention, when the water is fed to the auxiliary heat source machine, the water can be fed to the auxiliary heat source machine if the switching selecting means is fixed to the water. Since the gas is fed, the gas pressure can be easily and safely adjusted without boiling inside the auxiliary heat source machine even during the maximum combustion when adjusting the gas pressure in the auxiliary heat source machine.

Further, according to the hot and cold water mixing unit of the present invention (claim 6), even if there is no abnormality in the auxiliary heat source machine or there is no communication with the auxiliary heat source machine, it is forced by the mixed water temperature forced setting means. Since the mixed water, which has been fixed to a fixed temperature, is sent to the auxiliary heat source device, it is possible to effectively utilize the hot water of the hot water supply device at the user's discretion.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following embodiments, a solar hot water supply system will be described as an example of a solar hot water supply system in which a solar hot water supply device is connected to a hot water supply device as an auxiliary heat source device by the hot water mixing unit of the present invention. Embodiment 1 (Claims 1 and 2) FIG. 1 is an overall configuration diagram of a solar hot water supply system using a hot water mixing unit according to Embodiment 1 of the present invention. This hot and cold water mixing unit has a communication function for transmitting and receiving information to and from the water heater, and further has an emergency operation function when the water heater fails. First, the configuration of each part of the solar hot water supply system will be described with reference to FIG.

(Solar Heater) The solar water heater 5 is
The heat storage circulation path 52 is formed so as to circulate between the heat collector 50 that absorbs solar heat and the hot water storage tank 51. The heat storage circulation path 52 has a hopper 53 and a circulation pump 5.
And 4 are provided. Further, at the bottom of the hot water storage tank 51, a water supply passage 55 for a solar water which extends from a water supply passage 60 for a water source such as water supply and a water drain passage 58 having a water drain plug 57 are connected. At the top of the hot water storage tank 51, a solar hot water discharge path 56 for taking out hot solar water from the hot water storage tank 51 is drawn out. Then, when the circulation pump 54 is driven to circulate the liquid medium in the animal heat recovery circulation path 52, the liquid medium heated by the heat collector 50 is introduced into the hot water storage tank 51 through the animal heat recovery circulation path 52 to store hot water. The water in the tank 51 is heat-exchanged and heated to form the solar hot water, and the hot solar water in the hot water storage tank 51 is sent to the hot water / water mixing unit 1 side through the solar hot water discharge passage 56.

(Water heater) The water heater 7 includes a water heater main body 70 having a built-in heat exchanger 73 which is heated by a burner (not shown), various operating parts (operation switch, bath water filling switch, additional heating). Switch, hot water temperature setting device, combustion display 710
Etc. are arranged, and the remote controller 71 is connected to the remote controller 71 by a wiring cable 78 to form a bath 81 or a tap 81.
And a hot water supply controller 72 for controlling hot water supply.
In addition, the heat exchanger 73 has an inlet channel 76 and an outlet channel 84.
And a forward pipe 82 and a return pipe 83, which are used for filling and reheating water, are connected to the bathtub 81. A bath drop path 74 for supplying hot water to the bath 81 is provided in the hot water discharge path 84 in the hot water discharge path 82, and a drop opening / closing valve 75 is provided in the bath drop path 74 and the downstream thereof. A three-way valve 80 is provided at a connection point with the forward pipe 82. A tap tap 85 is provided at the end of the tap passage 84. In addition to this, although not shown, the water inlet 76, the hot water outlet 84, the outflow pipe 8
2 and the return pipe 83 are provided with a temperature sensor, and the water inlet 76 and the outflow pipe 82 are provided with a pump and a water amount sensor.

(Hot Water Mixing Unit) The hot water mixing unit 1 is a device for connecting the solar water heater 5 to the water heater 7, and has a communication function with the water heater 7 and an emergency in case of failure of the water heater 7. It has a driving function.

The hot and cold water mixing unit 1 is provided with a solar hot water passage 14 through which solar hot water (hot water) from the solar water heater 5 passes, a cold water passage 15 through which water from a water source such as water supply, and the like. A mixing water channel 29 in which the solar hot water channel 14 and the cold water channel 15 are merged to pass a mixed water of the solar hot water and water, and a mixing controller 3 for mixing the solar hot water and the water flowing into the mixing water channel 29. And a controller 11 that controls the operation of the mixing controller 3.

The solar hot water channel 14 has an inflow port 16 thereof.
The solar hot water outlet 56 of the solar water heater 5 is connected to
It is connected to the mixing water channel 29 at its downstream end. In this solar hot water passage 14, in order from the upstream side, a drain plug 21 with a filter that also has a dust removing function of the solar hot water, and when the internal pressure of the hot water storage tank 51 decreases, the outside air is sucked in to control the internal pressure decrease. The vacuum breaker 12, the check valve 13, and the solar hot water temperature sensor 19 are provided respectively.

The cold water passage 15 is connected at its inflow port 17 to the water supply branch passage 10 in which a part of the water supply passage 60 is branched from the downstream side of the pressure reducing valve 61, and is connected at its downstream end to the mixed water passage 29. There is. The cold water passage 15 has a drain plug 3 with a filter, which also has a function of removing dust in water, in order from the upstream side.
0, a check valve 22, and a cold water temperature sensor 23 are provided respectively.

The mixed water channel 29 is the solar warm water channel 1 described above.
4 and the cold water passage 15 are joined together, and the water inlet 76 of the water heater is connected to the outlet 18 thereof. The mixed water passage 29 opens in this order from the upstream side when the water supply amount control valve 24, the warm water amount control valve 25, the water amount sensor 32, the mixed water temperature sensor 33, the high cut temperature sensor 34, and the water pressure in the mixed water passage 29 increase excessively. Overpressure relief valves and water drain plugs 35, which also have the function of releasing the valve pressure, are provided.

A bypass passage 28 that branches from the cold water passage 15 to the mixed water passage 29 is provided, and an electromagnetic opening / closing valve 31 is provided in the bypass passage 28. Therefore, power failure, failure of the water supply amount control valve 24 or the hot water amount control valve 25, the temperature sensors 19, 2
When an abnormality that cannot control the mixing of the solar hot water and water occurs due to a failure of 3, 33, 34, etc., the controller 1
The control signal from 1 stops the voltage supply to the solenoid in the solenoid on-off valve 31 to bring it into a fully opened state, so that the water in the cold water passage 15 flows into the mixed water passage 29 through the bypass passage 28. As a result, even if the above-mentioned abnormality occurs, the solar hot water in the mixed water passage is cooled by the water from the bypass passage.
High-temperature mixed water that exceeds 0 ° C. is not supplied to the water heater 7, and the user of the water heater 7 is not injured.

The mixing controller 3 includes a water supply amount adjusting valve 24 and a warm water amount adjusting valve 25. Hot water flow control valve 25
Is provided at a connection point of the mixed water channel 29 with the solar hot water channel 14, and the water supply amount control valve 24 is provided at a connection point of the mixed water channel 29 with the cold water channel 15.
The hot water amount control valve 25 and the water supply amount control valve 24 are operation-controlled by a control signal from the controller 11 to determine the mixing ratio of the hot water and the solar hot water.

The controller 11 is connected to the hot water supply controller 72 of the hot water supply device 7 through a communication line (signal line) 77 in addition to controlling the operation of the hot water / water mixing unit 1 and holds a communication function. It also retains the emergency operation function in case of failure. The controller 11 includes a communication unit 111, a mixing control unit 112, a rising temperature calculation unit 113, a mixing temperature calculation unit 114, an emergency operation execution unit 115, and the like.

The communication unit 111 has a communication function for transmitting and receiving information to and from the hot water supply controller 72 that controls the operation of the hot water supply device 7. For example, this communication unit 111 receives hot water supply set temperature information from remote controller 71 from hot water supply controller 72 and receives this information. This hot water supply set temperature information is shown in Table 1 below, for example.
Is communicated as a coded signal as shown in the left column "CODE".

[0038]

[Table 1] Explaining one example of this table 1, if the HEX code is “0” and the BC code is “0000” in the transmission signal, it means that the hot water supply set temperature at that time is “35 ° C.” (Table 1 Medium, HEX code is "H
It is indicated by "EX", and the BC codes are "BC0" and "BC
The value of each place is shown by "1", "BC2", and "BC3". ).

In addition, the hot water supply controller 72
From, the operation mode information such as hot water use and automatic hot water filling input by the remote controller 71, temperature information and water amount information entered from each sensor of the water heater 7, combustion control information in the controller of the hot water controller 72, etc. Information of the controller 11
While being transmitted to the communication unit 111, the controller 1
From the first, various information such as temperature information and water amount information entered from each sensor of the hot water mixing unit 1, mixing control information entered from the mixing control unit 112, combustion prohibition request to the water heater 7, and the like are supplied to the hot water controller 72. The information is transmitted, and the information is sent to the controller 11 and the hot water supply controller 7.
Shared with two.

The mixing control section 112, in addition to the hot water supply set temperature information input by the remote controller 71, the solar hot water temperature sensor 19, the cold water temperature sensor 23, the mixed water temperature sensor 3
3, the high cut temperature sensor 34, the water amount sensor 32, and the like, based on the respective detection information input, the warm water amount control valve 25 and the water supply amount control valve 2 in the mixing controller 3 described above.
4. The operation control is performed on the opening / closing valve 31 of the bypass passage 28. The remote control 7 controls the mixing of the hot water flow control valve 25 and the water supply flow control valve 24.
Depending on the operation mode in No. 1, the temperature of the solar hot water at the solar hot water temperature sensor 19 is compared with the hot water supply set temperature at the remote controller 71 or the temperature obtained by adding or subtracting a few degrees from this hot water supply set temperature. As an example of this mixing control, specifically, it is performed as shown in Table 2 below.

[0041]

[Table 2] As an outline of this mixing control, if the temperature of the solar hot water is higher than the hot water supply set temperature, the output of the mixed water temperature sensor 33 is monitored and the mixed water is mixed so as to reach the hot water supply set temperature, and at the same time, the water heater 7 is prohibited from burning. Request is made. On the other hand, if the temperature of the solar hot water is lower than the hot water supply set temperature, the output of the mixed water temperature sensor 33 is monitored, and the mixed water is mixed so that the mixed hot water temperature reaches the hot water supply set temperature minus the temperature rise due to combustion in the water heater 7. Will be done.

In the mixing control section 111, the high-cut temperature sensor 34 detects a temperature at which the temperature of the mixed water in the mixing water channel 29 exceeds the limit temperature (for example, 60 ° C.) set by the remote controller 71 in the water heater 7. Then, the hot water amount control valve 25 is forcibly fully closed to stop the supply of the solar hot water. As a result, high-temperature mixed water exceeding the set limit temperature is supplied to the water heater 7 side by the mixed water passage 29.
I am trying not to be supplied from.

The rising temperature calculation unit 113 is provided in the mixing water channel 2
When the mixed water of the water amount Q judged from the output of the water amount sensor 32 at 9 is heated by the water heater 7 operating at the minimum combustion amount (minimum combustion of the burner), the mixed water of the water amount Q can be heated and raised. The temperature rise ΔT is calculated. Specifically, when the heat generation amount of the water heater 7 operating at the minimum combustion amount is the minimum heat generation amount Wmin, the temperature rise ΔT = minimum heat generation amount Wmin / water amount Q is calculated.

Although the rising temperature calculation unit 113 is configured to obtain the rising temperature ΔT based on the minimum combustion amount of the minimum combustion of the burner, for example, the specific combustion amount of the eye slightly higher than the minimum combustion of the burner. The rising temperature ΔT may be calculated based on (minimum heat generation amount + α).

The mixing temperature calculation unit 114 is provided with the remote controller 7.
The target mixing temperature MT (mixing set temperature) lower than the hot water supply set temperature set in 1 by the rise temperature ΔT is calculated. Specifically, target temperature MT = hot water supply set temperature S−increased temperature ΔT is calculated.

The emergency operation executing unit 115 automatically determines an abnormality such as a failure of the water heater 7 from the communication content of the communication unit 111, and when the abnormality of the water heater 7 occurs, controls the mixing control unit 112 to make an emergency. This is for performing an emergency operation in which mixed water is mixed so as to reach a mixed set temperature for operation, and has a set temperature selection unit 116, a determination unit 117, an emergency operation command unit 118, and the like.

The set temperature selection unit 116 is capable of arbitrarily setting the mixed set temperature for the emergency operation, and for example, it may be one which arbitrarily sets a predetermined temperature in a plurality of stages by a dip switch or the like. However, the predetermined temperature may be arbitrarily set steplessly by a volume or the like. Further, by limiting the upper limit of the setting range in the set temperature selection unit 116, it is possible to prevent high temperature hot water from being discharged during emergency operation. Table 3 below shows an example in which the preset temperature selection unit 116 is configured by a DIP switch.

[0048]

[Table 3] The DIP switches shown in Table 3 are No1 to N
O of these DIP switches, which consist of three
By designating N and OFF as shown in the same table 3, the mixed set temperature shown in the right column is selected. In addition, "fixing water" in the right column of the same table 3 means that only the water from the cold water passage 15 is sent to the mixed water passage 29 without mixing the solar hot water from the solar hot water passage 14 with it. Therefore, by setting “fixed water” in the set temperature selection unit 116, it is possible to deal with a user who wants to use only water during emergency operation.

The set temperature selection section 116 may be set to only a specific temperature which is predetermined at the time of factory shipment. If this specific temperature is set to a low temperature that does not become a high temperature, it is possible to reliably prevent the hot water from being discharged during an emergency operation.

If the communication content of the communication unit 111 is abnormal, the determination unit 117 determines that the water heater 7 is abnormal. If the communication content is abnormal, for example, the communication unit 111 is used. If the answerback signal for reply included in the transmission signal of is cut off, or part or all of the control information signal that should be transmitted from the hot water supply controller 72 is cut off, or if there is some abnormality in the water heater 7. When the error occurs, the error display is displayed on the remote controller 71 when the error code signal is intercepted. In this way, the determination unit 117 automatically determines the abnormality of the water heater 7 from the communication content of the communication unit 111. When the above abnormality occurs, some trouble has occurred on the side of the water heater 7 that the main body of the water heater 7, the hot water controller 72, the remote controller 71, or each sensor has failed, so the water heater 7 no longer burns. It is thought that he will not be driven.

The emergency operation command unit 118 mixes the mixed water so that the water temperature of the hot water supply device 7 is determined to be abnormal by the determination unit 117 so as to reach the mixed set temperature set by the set temperature selection unit 116. The emergency operation instruction is given to the mixing control unit 112. Accordingly, when the hot water outlet 7 of the hot water heater 7 is opened when the hot water heater 7 is out of order, the water flow by the water amount sensor 32 of the mixed water passage 29 is detected, and at this time, by the command of the emergency operation command unit 118, The mixing control unit 112 executes the emergency operation. Then, the mixed water mixed to the mixed set temperature for emergency operation is sent out to the mixed water passage 29, and the mixed water passage 29 is connected to the water inlet 76 of the water heater 7.
Since it is connected to the hot water supply device 7, the hot water of the mixed water is taken out from the hot water outlet faucet 85 of the water heater 7. Therefore, even if the water heater 7 breaks down, the emergency operation is executed and the hot water with the mixed water can be taken out.

(Operation in Hot Water Mixing Unit) Next,
The operation of the hot / water mixing unit 1 will be described with reference to the flowchart shown in FIG. Referring to FIG. 2, when the hot water mixing unit 1 is powered on, whether the communication with the hot water supply controller 72 is normally performed by the determination unit 117 based on the communication content of the communication unit 111 in step S1. It is judged whether or not. If this communication is not normally performed, it is automatically determined that the water heater 7 is out of order, and the process proceeds to the control flow for emergency operation in step S2. Then, in step S2, it is monitored from the output of the water amount sensor 32 of the mixed water passage 29 whether or not there is water in the mixed water passage 29. When water in the mixed water passage 29 is detected in step S2, the process proceeds to step S3. Then, the emergency operation is executed.

That is, in step S3, the emergency operation command unit 118 issues an emergency operation instruction to mix the mixed water so that the mixed water is brought to the mixed set temperature set by the set temperature selection unit 116. Command. As a result, when the water heater 7 fails, the water heater 7
When the tap water tap 85 is opened, the water quantity sensor 32
Water flow is detected, and at this time, the mixing control unit 112 executes the emergency operation according to the instruction of the emergency operation instruction unit 118.
Then, the mixed water mixed to the mixed set temperature for the emergency operation is sent to the mixed water passage 29,
Since the mixed water passage 29 is connected to the water inlet passage 76 of the water heater 7, hot water by the mixed water is taken out from the hot water outlet faucet 85 of the water heater 7. Therefore, the water heater 7
Even if is broken, emergency operation is executed and hot water with mixed water can be taken out.

Subsequently, the control flow of this emergency operation moves to step S4, and again at this step S4, the discriminating section 117 again monitors whether or not the communication with the hot water supply controller 72 is normally performed. If the communication is not normally performed as in the case of the determination in step S2, the mixed water of the mixed set temperature for the emergency operation is sent to the mixed water channel as it is, and the water flow in the mixed water channel is stopped in step S6. Whether or not it is repeated is repeated.

On the other hand, if it is determined by the determination unit 117 in step S4 that the communication has returned to normal, the process proceeds to step S5, and the emergency operation command unit 118 is sent.
Is switched to a water fixing operation for the mixing control unit 112, that is, an operation of feeding only the water from the cold water passage 15 to the mixing water passage 29 without mixing the solar hot water in the solar hot water passage 14. At this time, if the water heater 7 starts to operate normally in combustion, the water sent to the water heater 7 side is heated to the hot water set temperature set by the remote controller 71 by the combustion control in the water heater 7 main body. Then it is bathed. Even if the communication is restored to normal, even if the main body of the water heater 7 is still out of order and the combustion operation is not normally performed, the hot water outlet 8 of the water heater 7
There is no possibility that the user will get burned if hot water does not come out only by taking out water from the 5 or the like.

Unless it is detected in step S6 that water is not flowing through the mixed water passage 29, the control flow for this emergency operation is returned to step S4 to monitor whether or not the communication with the hot water supply controller 72 is normal. Even if it is determined again in step S4 that the communication is no longer normal, the water fixing operation is continued. That is,
If the communication with the hot water supply controller 72 is not normal or returns to normal during one hot water supply operation, a poor contact occurs between the communication line 77 itself or between the communication line 77 and the hot water supply controller 72. It is considered that the container 7 itself is normal. Therefore, if the mixed water of the mixed set temperature for the emergency operation is sent into the mixed water passage 29 even if the communication is not normal again, the water heater 7 itself normally burns and may be burned. Since there is a possibility that hot water with a very high temperature may be discharged, after securing the safety aspect as described above, after the processing of step S5, the water fixing operation should be continued until there is no water in the mixed water passage 29. There is.

Next, in step S1, it is determined that communication with the hot water supply controller 72 is normally performed,
When the output of the water amount sensor 32 is output in step S11 and water passage in the mixed water passage 29 is detected, the process proceeds to step S12, and normal operation is executed.

That is, the mixing control unit 112 receives the hot water supply set temperature from the remote controller 71 to determine the mixing ratio in the mixing controller 3, and the water supply amount adjusting valve 24 and the hot water amount adjusting valve 25 in the mixing controller 3. Is performed to mix the mixed water, and the hot water outlet temperature at the hot water supply outlet is controlled to the hot water supply set temperature. The mixing control in the mixing control unit 112 at this time is performed, for example, as shown in Table 2 above.

That is, referring to the table 2, when the operation mode of the remote controller 71 is only "hot water supply" and automatic bath filling or reheating is not performed, the solar temperature is the hot water supply set temperature of the remote controller 71. If it is + 1 ° C or higher, remote control 7
The mixed water is mixed so that the hot water supply set temperature of 1 is reached. In this case, the communication unit 111 sends a combustion prohibition request signal to the hot water supply controller 72, and the hot water supply controller 72 that receives the signal prevents the hot water supply device 7 from performing combustion operation. Therefore, the mixed water mixed to the hot water supply set temperature by the remote controller 71 is taken out as it is from the hot water outlet of the water heater 7.

When the solar temperature is lower than the hot water supply set temperature of the remote controller + 1 ° C., the target mixed temperature (mixed temperature) obtained by subtracting the rising temperature defined by “minimum heat generation amount / water amount of mixed water” from the hot water supply set temperature. The mixed water is mixed to reach the set temperature). The calculation of the target mixing temperature is obtained by the rising temperature calculation unit 113 and the mixing temperature calculation unit 114. Then, the mixed water mixed to the target mixing temperature is heated to the hot water supply set temperature by the minimum combustion in the water heater 7, and this hot water is taken out from the hot water outlet of the water heater 7.

As for the operation mode, in the case of automatic hot water filling in a bath, the same temperature as the above-mentioned "hot water supply" operation mode is used except that the temperature of the solar and the set temperature of the hot water supply are compared. Water mixing is done.

Further, as the operation mode, in the case of additional heating in the bath, the temperature of the solar temperature is compared with the hot water supply set temperature + 1 ° C. as in the case of the “hot water supply” operation mode.
If the solar temperature is lower than the hot water supply temperature set by the remote controller + 1 ° C, the target mixing temperature (mixing set temperature) obtained by subtracting the rising temperature defined by "(minimum calorific value + α) / water volume of mixed water" from the hot water supply setting temperature The mixed water is mixed so that That is, the mixed water is mixed at the target mixing temperature which is lower by the calorific value equivalent to α than in the “hot water supply” operation mode, and the water heater 7 burner burns with the calorific value higher than the minimum combustion by the calorific value equivalent to α. Is done. this is,
When the heat exchanger 73 (see FIG. 1) uses the same type of hot water heater as the hot water heating fin, when the hot water heater simultaneously burns the hot water and the hot water is burned at the same time, the drain on the hot water side causes drainage. Since it easily occurs, in order to avoid the occurrence of drainage, in the case of additional heating, the calculation is made at a rising temperature due to a slightly higher calorific value than in the minimum combustion.

In the calculation of the target mixing temperature, if the calorific value due to the combustion of the water heater 7 in the rising temperature calculating section 113 is calculated as (minimum calorific value + α), the calculation by the mixing temperature calculating section 114 will be performed. Therefore, it is also possible to add a correction element for adding the heat generation amount equivalent to α to the above-mentioned temperature rise calculation unit 113, and then share these calculation units 113 and 114, or alternatively, "(minimum A rising temperature calculation unit for calculating the rising temperature defined by “heat generation amount + α) / water amount of mixed water” may be separately provided.

Subsequently, when the control flow of this normal operation moves from step S12 to step S13, whether or not the communication with the hot water supply controller 72 is normally performed is monitored in this step S13, and the normal communication is confirmed. If
In the next step S14, the water is monitored in the mixed water channel 29 until the water flow is stopped.

On the other hand, when it is determined in step S13 that the communication is not normally performed, the control flow proceeds to step S15, and the mixing control section 112 causes the mixing controller 3 to operate.
Is set as the water fixing operation, and this water fixing operation is continued until there is no water in the mixing water channel in the monitoring in step S16. Also in this case, step S in the control flow of the emergency operation described above.
As explained in Section 5, the water heater 7
Since the main body may be normal, the water fixing operation is continued to ensure safety.

In the above operation, the abnormality of the water heater 7 is determined depending on whether the communication with the water heater 7 is normal. However, if some abnormality occurs in the water heater 7, the remote controller 71 When the error code signal is displayed by the communication unit 111, the water heater 7
It may be determined that an abnormality has occurred.

As described above, according to the first embodiment, even if the water heater 7 is out of order, the emergency operation executing unit 115 can execute the emergency operation and take out the hot water as the mixed water. It is very convenient for the user. Further, when the hot water heater 7 is out of order, the emergency operation is automatically executed by the emergency operation executing unit 115 upon detection of water flow in the mixed water passage 29, so that the convenience for the user can be further improved. Moreover, even if the water heater 7 cannot be used due to an abnormality such as a failure, the solar water heater 5 can be used to take out hot water, so that the energy saving effect by utilizing the solar heat energy can be maximized.

Further, even during the emergency operation, the set temperature selection section 116 can arbitrarily set the mixed set temperature for the emergency operation and take out hot water of a desired temperature, which is very convenient for the user. Further, by limiting the upper limit of the setting range in the set temperature selection unit 116 so that hot water is not discharged, safety during emergency operation can be sufficiently ensured. Second Embodiment (Claims 1 and 3) Next, a second embodiment of the present invention will be described.

By the way, although the hot water supply device 7 is determined to be abnormal by the determination unit 113, it may be due to a partial disconnection of the communication line 77, a poor contact between the hot water supply controller 72 and the communication line 77, or the like. Yes, in this case, water heater 7
There is no malfunction in the body. Then, in this case, when the hot water supply set temperature, operation control information and the like from the remote controller 71 are input to the hot water supply controller 72, the water heater 7 can independently operate normally.

Therefore, in the hot and cold water mixing unit 1 according to the second embodiment, even when only the communication is abnormal and the main body of the water heater 7 is normally operated, such a state is automatically determined and the emergency operation is performed. This makes it possible to supply hot water.

The hot and cold water mixing unit 1 according to the second embodiment is similar to the first embodiment except that the communication section 111 is used.
In addition, the operation of the remote control 71 via the communication line 77
It is also intercepting the N-OFF signal.

If the hot water supply device 7 is determined to be abnormal by the determination unit 117 but the communication unit 111 is intercepting the operation ON signal, the emergency operation command unit 118 receives the operation ON signal. The emergency operation instruction for mixing the mixed water so that the mixed set temperature obtained in step 3 is reached is given to the mixing control section 112. Other configurations are the same as those in the first embodiment.

The operation of the hot and cold water mixing unit 1 according to the second embodiment follows the flowchart shown in FIG. As shown in FIG. 3, the difference from the operation in the first embodiment in the case of the second embodiment is that a control flow of steps S21 to S23 is added after step S1 in FIG.

That is, if it is determined in step S1 that the communication is not normal, the process proceeds to step S21, and in step S21, it is determined whether the remote controller 71 of the water heater 7 can be turned on. This judgment is based on the communication unit 111.
It is carried out depending on whether or not the operation ON signal of the remote controller 71 being intercepted at is confirmed. And the remote control 7
When the operation ON signal of No. 1 has been confirmed by the communication unit 111, the water flow in the mixed water passage 29 is monitored in the next step S22, and when this water flow is detected, the next step S23.
Then, the mixed water is mixed at the mixing set temperature obtained by subtracting the temperature rise caused by the combustion of the water heater 7 from the hot water set temperature, and the mixed water is sent to the water heater 7 side.

That is, even if the communication section 111 detects a communication abnormality and determines that the water heater 7 is abnormal, if the operation ON signal of the remote controller 71 of the water heater 7 is confirmed,
Since the remote control 71 is turned on, the water heater 7 may be normally burned. This is because only the communication with the water heater 7 is abnormal, and there is no abnormality in the body of the water heater 7. Because it will be done. Therefore, if the main body of the water heater 7 is normal, the mixed water is heated by the combustion operation of the water heater 7 to reach the hot water set temperature of the remote controller 71, and the hot water is discharged. When the emergency operation of step S23 is executed, even if the hot water supply device 7 is not in the combustion operation, the mixed water is generated by the remote controller 71.
Since the hot water is discharged at the mixed set temperature that is lower than the hot water supply set temperature by the above-mentioned rising temperature, the safety can be secured without being injured.

From the above, according to the second embodiment, even in the case where only the communication is abnormal and the main body of the water heater 7 is normally operated for combustion, hot water can be supplied by the emergency operation utilizing the solar hot water. It will be possible.

The other operations are the same as those in the first embodiment.
The same is done as in the case of. Third Embodiment (Claims 4 and 5) Next, a third embodiment of the present invention will be described.

The hot and cold water mixing unit according to the third embodiment is
The hot and cold water mixing unit can be connected to a water heater or a water heater having a different communication protocol that does not allow normal communication connection, so that the solar hot water can be used effectively and safely.

That is, in the hot and cold water mixing unit 1 according to the third embodiment, as in the first and second embodiments, the controller 11 determines the mixing ratio in the mixing controller 3 and controls the operation of the mixing controller 3. Presence / absence of communication from the water heater 7 in addition to the communication unit 111 that holds a communication function for transmitting and receiving information to and from the mixing control unit 112 that performs the operation and the hot water supply controller 72 that controls the operation of the water heater 7. A communication discriminating unit for discriminating the temperature and a changeover selection switch (switching selecting means) capable of arbitrarily setting the temperature of the mixed water are provided (neither is shown), and the communication discriminating unit judges that there is no communication from the water heater 7. In this case, the mixing control unit 112 controls the mixing of the mixed water so that the temperature becomes the temperature set by the changeover selection switch.

The controller 11 according to the third embodiment does not have the rising temperature calculation unit 113, the mixed temperature calculation unit 114, the emergency operation execution unit 115 and the like as in the first and second embodiments. Good. Other configurations are the same as those in the first embodiment.

As the changeover selection switch,
For example, the temperature of the mixed water may be fixed at a certain constant temperature, or the set temperature selection unit 1 in the first embodiment may be used.
As shown in FIG. 16, the temperature of the mixed water can be arbitrarily set, and “fixing water” or setting the temperature in multiple stages by a dip switch or a volume may be used.

According to the hot / water mixing unit 1 of the third embodiment, when the communication determining section determines that there is no communication from the hot water heater 7, the hot water heater 7 is set by the changeover selection switch. Regardless of the temperature, the mixed water having the temperature set by the changeover selection switch is sent to the water heater 7. Then, in the water heater 7, the mixed water is heated to a hot water supply set temperature, and hot water having the hot water supply set temperature is supplied from the hot water outlet or the like. For example, if the temperature set by the changeover selection switch is set to a low temperature such as 30 ° C., the hot water supply set temperature by the remote controller 71 of the water heater 7 is usually 30 ° C. or higher, so that the mixing exceeding the hot water supply set temperature is performed. The water is not sent to the water heater 7, and the hot and cold water mixing unit 1 can be safely connected to any water heater 7 (made by a different manufacturer or the like). Even if the water heater 7 is discharged at a fixed hot water temperature of, for example, 60 ° C., if the temperature of the mixed water is set to a high temperature such as 50 ° C. by the changeover selection switch, the heating by the hot water heater 7 is performed. 6 while minimizing
Hot water of 0 ℃ can be taken out, so solar hot water can be effectively used.

In this way, even if the main hot water / water mixing unit 1 is connected to the water heater 7 in which communication is not established, if the communication discriminating section determines that there is no communication from the water heater 7, the switching selection is made. The mixed water having the temperature set by the switch can be sent to the water heater 7, and the hot water of the solar can be effectively and safely used. Further, when constructing the solar hot water supply system, it is not necessary to replace the hot water supply device 7 with a communication function, and the solar hot water supply system can be easily realized.

Further, if the changeover selection switch is set to the water fixing operation, water will be sent to the water heater 7. Therefore, it becomes possible to cope with the case where it is desired to send water instead of mixed water to the water heater 7. For example, the gas pressure in the water heater 7 can be adjusted easily and safely without boiling inside the water heater 7 even during the maximum combustion when adjusting the gas pressure in the water heater 7.
It is very convenient. In addition, without burning in the water heater 7,
Hot water can be used only with the main hot water mixing unit 1.

(Others) The hot and cold water mixing unit according to the present invention is not limited to any of the above embodiments. For example, in each of the above-described embodiments, a mixed water temperature forced setting means such as a priority switch (or a forced switch) for forcibly setting the temperature of the mixed water to a fixed temperature when mixing control of the mixed water by the mixing control unit 112 is provided. May be. According to this, even if there is no abnormality in the water heater 7 or there is no communication with the water heater 7, the mixed water temperature compulsory setting means forcibly sends the mixed water to a fixed temperature to the water heater 7, Therefore, it is possible to effectively use the solar hot water according to the judgment of the user. Here, the fixed-temperature mixed water includes not only hot water obtained by mixing the solar hot water of the solar water heater 5 with the water of the water source, but also water fixation of only water that does not mix the solar hot water.

Further, in each of the above embodiments, the bypass passage 28 is provided between the cold water passage 15 and the mixed water passage 29. However, without providing such a bypass passage 28, for example, a power failure or the above-mentioned mixing adjustment is performed. Vessel 3 (hot water flow control valve 2
5 or the solenoid hot water passage 14 may be provided with an electromagnetic opening / closing valve that is fully closed in the event of an abnormality such as a failure of the water supply amount control valve 24).

Further, in each of the above-mentioned embodiments, as the mixing controller 3, the mixing of the solar hot water and the water is performed by the biaxial control by the hot water amount adjusting valve 25 and the water supply amount adjusting valve 24. For example, a single valve body is provided at the confluence of the solar hot water passage 14 and the cold water passage 15, and the angle of the valve body is adjusted to adjust the mixing ratio of the solar hot water from the solar hot water passage 14 and the water from the water supply passage 15. You may make it perform with the 1 axis control mixing regulator which adjusts simultaneously. Further, in the above embodiment,
Although the solar water heater 5 is used as the hot water supplier,
The present invention is not limited to this, and may be, for example, a water heater using waste heat or other various water heaters.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an overall configuration of a hot water supply system using a hot and cold water mixing unit according to first and second embodiments of the present invention.

FIG. 2 is a flowchart showing a control flow in the hot and cold water mixing unit according to the first embodiment.

FIG. 3 is a flowchart showing a control flow in the second embodiment.

FIG. 4 is a configuration diagram showing an overall configuration of a hot water supply system using a conventional hot water mixing unit.

[Explanation of symbols]

1 Hot water mixing unit 3 Mixing controller 5 Solar water heater (hot water supplier) 7 Water heater (auxiliary heat source machine) 10 water supply branch 11 Controller 14 Solar hot water channel 15 cold water channels 19 Solar hot water temperature sensor 23 Cold water temperature sensor 24 Water supply control valve 25 Hot water flow control valve 28 Bypass passage 29 mixed waterways 31 on-off valve 32 Water sensor 33 Mixed water temperature sensor 34 High-cut temperature sensor 56 Solar water heater for solar water heater 71 Water heater remote control 72 Hot water supply controller 76 Water heater inlet 77 communication line 78 Communication cable 111 Communication unit 112 Mixing control unit 113 discriminator 113 Temperature rising calculator 114 Mixing temperature calculator 115 Emergency operation execution unit 116 Set temperature selection section 117 Discriminator 118 Emergency operation command section 710 Display of remote control

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yukihiro Suzuki             Rinnai 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya-shi             Within the corporation (72) Inventor Hiroaki Sasaki             Rinnai 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya-shi             Within the corporation

Claims (6)

[Claims] 1. A hot and cold water mixing unit for connecting a hot water supply device to an auxiliary heat source machine, wherein hot water from the hot water supply device passing through a hot water passage and water from a water source passing through a cold water passage are mixed and thereafter. Mixing controller for sending the mixed water of the above into the mixing channel connected to the water inlet of the auxiliary heat source device, and determining the mixing ratio in the mixing controller in response to the hot water supply set temperature in the auxiliary heat source device, and the mixing adjustment A mixing control unit that controls the operation of the container, and a communication unit that holds a communication function for transmitting and receiving information to and from the auxiliary heat source device, and the auxiliary heat source device based on the communication content of the communication unit. The emergency operation executing means for automatically determining the abnormality of the auxiliary heat source device and controlling the mixing controller to perform the emergency operation in which the mixed water is mixed so as to reach the mixing set temperature for the emergency operation when the auxiliary heat source device is abnormal. Hot and cold water mixing unit, characterized in that it comprises. 2. The hot and cold water mixing unit according to claim 1, wherein the emergency operation executing means includes a set temperature selection section capable of arbitrarily setting a mixed set temperature for the emergency operation, and communication contents in the communication section. From the discriminating unit for judging abnormality of the auxiliary heat source device from the above, the mixed water is mixed so as to reach the mixing set temperature set by the set temperature selecting unit when the judging unit judges that the auxiliary heat source device is abnormal. A hot and cold water mixing unit, comprising: an emergency operation command section for issuing an emergency operation instruction to the mixing control section. 3. The hot and cold water mixing unit according to claim 1, wherein a temperature rise calculation unit for calculating a temperature rise by dividing the amount of heat generated by the combustion of the auxiliary heat source machine by the amount of water of the mixed water, and the temperature rise It has a mixing temperature calculation unit for subtracting the hot water supply set temperature of the auxiliary heat source device to obtain a mixed set temperature, and the communication unit further has a reception function of intercepting an operation ON-OFF signal by the remote control of the auxiliary heat source device. The emergency operation execution means also has a determination unit that determines an abnormality of the auxiliary heat source device from the communication content of the communication unit, and the determination unit determines that the auxiliary heat source device is abnormal. Then, if you are intercepting the operation ON signal,
A hot and cold water mixing unit, comprising: an emergency operation command section for instructing the mixing control section to issue an emergency operation instruction for mixing the mixed water so that the mixed water has a mixed set temperature determined by the mixing temperature calculation section. 4. A hot and cold water mixing unit for connecting a hot water supply device to an auxiliary heat source device, wherein hot water from the hot water supply device passing through a hot water passage and water from a water source passing through a cold water passage are mixed together. Mixing controller for sending the mixed water of the above into the mixing channel connected to the water inlet of the auxiliary heat source device, and determining the mixing ratio in the mixing controller in response to the hot water supply set temperature in the auxiliary heat source device, and the mixing adjustment A mixing control unit that controls the operation of the container and a communication unit that holds a communication function for transmitting and receiving information to and from the auxiliary heat source device, and further determines whether or not there is communication from the auxiliary heat source device. A communication determination unit for determining and a switching selection unit capable of setting the temperature of the mixed water are provided, and when the communication determination unit determines that there is no communication from the auxiliary heat source device, the mixing control unit Switch selection above Hot and cold water mixing unit, characterized in that where the structure for mixing water mixing control so as to set in stage temperature. 5. The hot and cold water mixing unit according to claim 4, wherein the switching selection means also enables setting of a water fixing operation in which hot water of the hot water supplier is not mixed. Mixing unit. 6. The hot and cold water mixing unit according to claim 1, wherein the temperature of the mixed water is forcibly set to a fixed temperature during mixing control of the mixed water in the mixing control unit. A hot and cold water mixing unit characterized by being provided with.