JP3465534B2 - Method for judging stop of hot water supply on auxiliary water heater side of water heater with auxiliary water heater and water heater with auxiliary water heater - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply stop determining method for a hot water supply apparatus with an auxiliary hot water supply apparatus and a hot water supply apparatus with an auxiliary hot water supply apparatus. The present invention relates to a technique for determining hot water supply stoppage on the auxiliary water heater side by monitoring the amount of water, and a control operation when hot water supply stoppage from the auxiliary water heater side.

[0002]

2. Description of the Related Art A solar water heater with a hot water supply function that connects a solar water heater (auxiliary water heater) to a main water heater (main water heater) so that hot water from the solar water heater can be used as needed. (Hot water supply device with an auxiliary water heater) has been conventionally provided.

In this type of solar water heater with a solar water heater, the main water heater and the solar water heater are connected via a solar water heater connection unit (auxiliary water heater connection unit), and the solar water heater is connected to the main water heater. The hot water to be supplied is supplied to the main water heater by adjusting the amount of water flow and the mixing ratio with water by an opening / closing valve and a mixing valve provided in the solar hot water supply connection unit.

[0004]

However, the hot water supply apparatus having such a conventional auxiliary water heater has the following problems.

(1) That is, in this type of solar water heater with a hot water heater, the piping on the solar water heater side may freeze during the winter when the temperature drops, for example. The hot water supply sometimes stopped. The stop of hot water supply from such a solar water heater is not limited to the above-mentioned pipe freezing, and is caused by, for example, a failure of an opening / closing valve provided in the solar water heater connection unit. When the operation of the hot water supply device is started in the state where the hot water supply is stopped, the hot water supply from the hot water tap such as a calan causes hunting and becomes intermittent.

This is because when the hot water supply apparatus starts hot water supply operation, the mixing valve of the solar hot water supply connection unit first opens the water supply channel side (hereinafter referred to as "water side") connected to a water source such as water supply as an initial operation. The operation is started in the closed state (in this state, the solar water heater side (hereinafter referred to as the “solar side”) is fully closed). Thereafter, the mixing valve is controlled to open the valve on the solar side and close the valve on the water side in order to raise the temperature of the water supplied to the main water heater to the hot water set temperature. However, even if such control is performed, when the hot water supply from the solar water heater is stopped, hot water is not supplied from the solar water heater even if the solar side of the mixing valve is opened, so the main water heater from the mixing valve is not supplied. The temperature of the water supplied to the main water heater does not rise, only the amount of water supplied to the water heater decreases. Therefore, in the mixing valve, the valve on the solar side is opened more and the valve on the water side is closed more and more, and finally, the water is not discharged from the mixing valve. Therefore, the main water heater is below the minimum working water volume, and the mixing valve is once in the initial state (water side “open”, solar side “fully closed”).
Return. After that, the mixing valve starts the above control operation again, but as in the above case, finally there is no water coming out of the mixing valve, so such operation is repeated thereafter, and hot water supply from the hot water tap is intermittent. Becomes

As described above, when the hot water supply from the solar water heater is stopped due to the freezing of the pipes or the failure of the opening / closing valve, the hot water supply operation of the hot water supply device becomes unstable.

(2) Further, in relation to this, conventionally, as a measure against the freeze of the pipe, the water supplied from the water source to the solar water heater is directly supplied to the main water heater only during the winter season when the pipe may be frozen. It has been proposed that a bypass pipe for supply is provided. This bypass pipe is provided with an on-off valve (so-called “season valve”) that is opened only during the winter when freezing is expected. It takes a lot of time and effort to construct such bypass pipe, while using the water heater. Since it is necessary for a person to operate the season valve, the operation is troublesome and its improvement is desired.

The present invention has been proposed in view of the above problems, and an auxiliary water heater capable of quickly and accurately detecting a stop of hot water supply from a solar water heater and stably operating a main water heater. An object of the present invention is to provide a method for determining stop of hot water supply on the side and a hot water supply device with an auxiliary water heater.

[0010]

In order to achieve the above object, the invention as set forth in claim 1 provides a main water heater, an auxiliary water heater for supplying hot water to the main water heater, and the main water heater. An auxiliary water heater connection unit that intervenes between the water heater and the auxiliary water heater and supplies hot water supplied from the auxiliary water heater with water from a water source to the main water heater is provided. An on-off valve capable of shutting off hot water supplied from the auxiliary water heater via the auxiliary hot water supply channel; and hot water supplied from the auxiliary water heater and a water source supplied via a water supply channel to the downstream side of the on-off valve. Auxiliary water heater provided with a mixing control valve for mixing and adjusting water to be sent to the water inlet of the main water heater and an auxiliary water heater connection controller for controlling the mixing operation of hot water and water in the mixing control valve In the water heater, monitor the water output from the mixing control valve. And, and judging that the hot water supply from the auxiliary water heater when the fluctuations of the output water was repeated stopped.

That is, the invention described in claim 1 is
If the hot water supply from the auxiliary water heater side is stopped due to piping freezes or failure of the on-off valve, etc., the water discharge from the mixing control valve will be intermittent as described above, so this intermittent water discharge must be detected. Is to determine whether to stop supplying hot water from the auxiliary water heater. According to the actual measurement by the applicant,
Such intermittent water discharge varies depending on the type of hot water supply device and the like, but if it is the same type of hot water supply device, it is regularly repeated at a certain fixed cycle such as 10 seconds to 30 seconds. It can be detected as something different from the case where the hot water tap such as is repeatedly opened and closed. In other words, the invention according to claim 1 determines stop of hot water supply on the side of the auxiliary water heater by detecting such an intermittent repeating cycle of the water output of the mixing control valve.

The invention as set forth in claim 2 is characterized in that the amount of water discharged from the mixing control valve is monitored by monitoring the ON / OFF cycle of the minimum operating water amount detection signal of the main water heater. That is, in the auxiliary water heater connection unit in which the mixing control valve is arranged, normally, a temperature sensor for detecting the water temperature on the water outlet side of the mixing control valve is provided, but a water amount sensor for detecting the water output amount on the water outlet side is not provided. Therefore, the intermittent water discharge cycle as described above is detected by the ON / OFF cycle of the minimum working water amount detection signal which is turned ON when the minimum working water amount is detected in the main water heater. .

The invention according to claim 3 is a more specific form of the invention according to claim 2, wherein the on / off period is monitored when the on / off cycle of the minimum working water amount detection signal is monitored.
A step of determining whether or not the off cycle is performed within a predetermined time, a step of storing the cycle information as the minimum working water amount detection signal data when the cycle is within the predetermined time, and the stored minimum Comparing the operating water amount detection signal data with the previously detected minimum operating water amount detection signal data to determine whether the difference is less than or equal to a predetermined value, and when the difference between the cycles is less than or equal to the predetermined value. It is characterized in that it comprises a step of counting an error counter and a step of determining that the hot water supply from the auxiliary water heater is stopped when the error counter reaches a predetermined number.

This is because when the water output of the mixing control valve is intermittent, the minimum operating water amount detection signal of the main water heater also intermittently repeats on / off, so that the minimum operating water amount detection signal is When turned on / off, first, a step of determining whether or not this on / off cycle is within the range of the same cycle as the repeated cycle that occurs when the hot water supply from the auxiliary water heater side is stopped is provided. , If this is the case, the cycle time is stored as the minimum working water amount detection signal data, and the stored minimum working water amount detection signal data and the previously detected minimum working water amount detection signal data are compared, and the deviation between both cycles To determine whether the deviation is small enough to judge it as a repeat cycle based on the same cause (within a specified value), and if the deviation is less than or equal to the specified value, count the error counter. Te, when the count of the error counter reaches a predetermined number of times (i.e., when detected continuously) in which it is determined that the hot water supply is stopped from the auxiliary water heater to. That is, according to the third aspect, when the minimum working water amount detection signal is turned on / off, the one that is considered to be due to the stop of hot water supply from the auxiliary water heater is selected from among them, and then the previous time is stored. By comparing with what was done,
It is judged whether or not the ON / OFF of the minimum working water amount detection signal is in the same cycle as the previous cycle, and if it is judged that it is in the same cycle, whether or not the ON / OFF of the minimum working water amount detection signal is repeated for the first time. Is to judge.

According to a fourth aspect of the invention, in monitoring the on / off cycle of the minimum working water amount detection signal, a step of determining whether or not the on / off cycle is performed within a predetermined time, and the cycle thereof. Is within the above predetermined time, the step of storing the cycle information as the minimum working water amount detection signal data, and the stored minimum working water amount detection signal data and the past minimum working water amount detection signal data A step of calculating the working water amount detection signal addition data,
Comparing the calculated minimum working water amount detection signal addition data with preset reference data to determine whether the difference is less than or equal to a predetermined value, and the difference between the cycles is less than or equal to a predetermined value. In this case, it comprises a step of counting the error counter and a step of determining that the hot water supply from the auxiliary water heater is stopped when the error counter reaches a predetermined number.

That is, the invention according to claim 4 is
For example, when an element such as a pressure pump is interposed between the auxiliary water heater connection unit and the main water heater, the ON / OFF cycle of the minimum operating water amount detection signal of the main water heater depends on the pressure pump or the like interposed in the middle. In this case, even if the minimum working water amount detection signal data detected as in claim 3 is compared with the previous minimum working water amount detection signal data, hunting on the water outlet side of the mixing control valve cannot be accurately detected. . Therefore, in the invention of claim 4, in order to absorb such a delay of the ON / OFF cycle, the minimum working water amount detection signal addition data is collected (added) by collecting several times of the past minimum working water amount detection data. At the same time, the minimum operating water amount detection signal addition data is compared with the reference data set in advance according to the number of additions to determine whether or not the same cycle is repeated. When it is determined that the same cycle is repeated, when the number of repetitions reaches a predetermined number, it is determined that the hot water supply from the auxiliary water heater is stopped.

According to a fifth aspect of the present invention, in monitoring the on / off cycle of the minimum working water amount detection signal, it is determined whether the on / off cycle is performed within a predetermined time, and the cycle. Is within the predetermined time, the step of storing the cycle information as the minimum working water amount detection signal data and the stored minimum working water amount detection signal data and the previously detected minimum working water amount detection signal data are compared. The step of determining whether or not the difference is less than or equal to a predetermined value, and comparing the water side inlet temperature and the outlet side outlet temperature of the mixing control valve when the difference between the cycles is less than or equal to a predetermined value. A step of determining whether the temperature difference is within a predetermined value, a step of counting an error counter when the temperature difference is within a predetermined value, and a step of counting when the error counter reaches a predetermined number of times. Hot water supply from the auxiliary water heater characterized by comprising the step of determining to be stopped.

That is, the invention described in claim 5 is the same as the invention described in claim 3 up to the point of comparing the minimum working water amount detection signal data with the data detected last time, but here, After that, a step of comparing the water-side inlet temperature and the outlet-side outlet temperature of the mixing control valve and determining whether or not the temperature difference is within a predetermined value is added. This is because when hot water supply from the auxiliary water heater side is stopped, hot water is not supplied to the mixing control valve, so there is a temperature change between the water inlet temperature and the outlet water outlet temperature of the mixing control valve. Since it should not exist, this point is added as a condition for determining whether to stop hot water supply from the auxiliary water heater. Therefore, according to the invention described in claim 5, it is possible to more accurately determine the stop of hot water supply than in the cases of claims 3 and 4.

According to a sixth aspect of the present invention, in the auxiliary hot water supply side hot water supply stop determination method according to any one of the first to fifth aspects, the auxiliary hot water supply side hot water supply stop determination is performed prior to the determination. There is provided a step of determining whether or not the water-side inlet temperature of the mixing control valve has reached a predetermined temperature, and depending on the result of the determination, the auxiliary with different set values in each step of the auxiliary water heater-side hot water supply stop determination method A feature is that a hot water supply side hot water supply stop determination method is selected and used.

That is, according to the sixth aspect of the present invention, prior to the determination of stop of hot water supply from the auxiliary water heater, a step of determining whether or not the water-side inlet temperature of the mixing control valve has reached a predetermined temperature is provided. If the inlet water temperature is low and there is a high risk of pipe freeze-up on the auxiliary water heater side, it will be possible to detect pipe freeze-up earlier by setting the error counter to a smaller number of counts than usual. It becomes possible to do.

According to a seventh aspect of the present invention, in a hot water supply apparatus with an auxiliary hot water supply device, hot water from the auxiliary hot water supply device is determined by the hot water supply stop determination method on the auxiliary hot water supply device side according to any one of the first to fifth embodiments. It is characterized in that it is provided with a control structure for fixing the mixing control valve by opening the water side when it is judged that the supply is stopped. Therefore, in the hot water supply apparatus with the auxiliary hot water supply device according to claim 7, even if the hot water supply from the auxiliary hot water supply is stopped, the water side of the mixing control valve is fixed in an open state, so that the water output of the mixing control valve is prevented. It does not become intermittent, and stable hot water supply is possible.

According to the invention described in claim 8, when it is judged that the hot water supply from the auxiliary water heater is stopped by the auxiliary water heater side hot water supply stop judging method according to any one of the first to fifth embodiments. The mixing control valve is fixed so that the water side is opened and the alarm display request signal is sent to an external alarm means. Therefore, according to the invention as set forth in claim 8, when the hot water supply from the auxiliary water heater is stopped, the device user can immediately recognize the stop of the hot water supply from the auxiliary water heater, thereby freezing and opening / closing the pipe. The necessary measures can be taken promptly for valve failures.

According to a ninth aspect of the present invention, there is provided a hot water supply device with an auxiliary hot water supply device, wherein the hot water supply stop determination method according to any one of the first to fifth aspects is used to temporarily
When it is determined that the hot water supply from the auxiliary water heater is stopped, the water side of the mixing control valve is opened and fixed, and the second error counter is counted, and the second error counter is set to a predetermined value. When the number of times is reached, it is finally judged that the hot water supply from the auxiliary water heater is stopped and an alarm display request signal is sent to an external alarm means, and the second error counter does not reach the predetermined number of times. In the case where the minimum working water amount detection signal is turned off, a control configuration for releasing the fixed state in which the water side of the mixing control valve is opened is provided.

That is, the invention described in claim 9 is
When it is first determined that the hot water supply from the auxiliary water heater is stopped, the mixing control valve is fixed to open on the water side to stabilize the water output from the mixing control valve, while an alarm display request is issued until the second error counter reaches the prescribed number of times. No signal is sent. Then, when the minimum operating water amount detection signal is turned off in a state where the second error counter does not reach the predetermined number of times, the fixing of the mixing control valve on the water side opening is released to restore the normal operation. It is adopted. This is because in the case of pipe freezes in winter, even if it freezes at night, it may melt during the day, so the minimum operating water detection signal is turned off before finally determining whether to stop hot water supply from the auxiliary water heater. If it becomes normal, by returning to normal operation, it is possible to use the auxiliary water heater during the day, and the determination of stop of hot water supply from the auxiliary water heater side is performed in two stages, so it is more accurate. Judgment is possible.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a hot water supply stop determining method for a hot water supply apparatus with an auxiliary hot water supply apparatus and a hot water supply apparatus with an auxiliary hot water supply apparatus according to the present invention will be specifically described below with reference to the drawings.

Embodiment 1 FIG. 1 shows the overall structure of a solar water heater with a hot water supply function (a water heater with an auxiliary water heater) according to the present invention. A main water heater A and a solar water heater (auxiliary water heater) are shown. B and a solar hot water supply connection unit (auxiliary water heater connection unit) C are provided as main parts.

The main water heater A mainly heats hot water supplied from the solar hot water supply connection unit C to a hot water supply set temperature as needed and supplies the hot water to the hot water supply lan 22b, the bathtub 44 and the like. 10 and a water inlet 21 and a hot water outlet 22 connected to the heat exchange can body 10, and a main controller 30 for controlling the main water heater A is provided as a main part. The heat exchange can body 10 of the main water heater A is an instantaneous heat exchange can body, which is provided with a burner 11 and has a finned heat for connecting the water inlet passage 21 and the hot water outlet passage 22 in the heat exchange can body 10. An exchange coil 23 is provided,
The hot water supply circuit 20 is configured by the water inlet passage 21, the hot water outlet passage 22, and the heat exchange coil 23.

A pump 21a, a water flow switch 21b, a water amount sensor 21c, and an incoming water temperature sensor 21d are provided in the incoming water passage 21 of the hot water supply circuit 20. Further, a hot water outlet temperature sensor 22a is provided in the hot water outlet passage 22 of the hot water supply circuit 20, and a hot water supply calan 22b is provided at the end of the hot water outlet passage 22. Further, a bypass passage 24 with a control valve 24a is provided from the water inlet passage 21 to the hot water outlet passage 22 to finely adjust the temperature of the hot water discharged from the hot water supply kerran 22b.

A bath drop path 25 for supplying hot water to the bathtub 44 is provided in the hot water exit path 22, and a drop opening / closing valve 25a is provided in the bath drop path 25. A bath reheating circulation path 40 for reheating the hot water in the bathtub 44 (tub water) is connected to the heat exchange can 10. The bath reheating circulation path 40 includes a forward path 41 that conveys the bath water heated from the heat exchange can body 10 to the bath 44, a return path 42 that returns the bath water from the bath 44 to the heat exchange can body 10, and the heat exchange described above. Can body 10
It is composed of a heat exchange coil 43 for performing heat exchange heating of the bath water inside, and the bath dropping path 2 is provided in the forward path 41.
Hopper receiving part 41 for receiving hot water dropped from 5
a and a three-way switching valve 41b are provided. further,
The return path 42 is provided with a circulation pump 42a, a bath temperature sensor 42b, and a water flow switch 42c.

Further, the main controller 30 inputs information from each sensor of the main water heater A and a command from the remote controller 50 to control the operation of the main water heater A and determine whether to stop hot water supply from the solar water heater described later. To do
It is composed of a microcomputer. The main controller 30 is a known communication means such as a modem so that it can communicate with the remote controller 50 and with a solar hot water supply connection controller (auxiliary water heater connection controller) 60 of the solar hot water supply connection unit C described later. And exchange information with each other. In addition, the main controller 30, the remote controller 50, and the solar hot water supply connection controller 60 of the solar hot water supply connection unit C described later.
Are connected to each other via communication transmission lines 101 and 102, and are capable of bidirectional communication.

The solar hot water supply connection unit C is for connecting the solar hot water supply passage 70 from the solar hot water supply B to the main water heater A side, and in addition to the solar hot water supply connection controller 60, a mixing control valve 61. Have. The solar water heater 7 from the solar water heater B is provided in the mixing control valve 61.
0 is connected to a water supply passage 80 from a water source such as water supply, and the water inlet passage 21 is extended from the mixing control valve 61 to the main water heater A. More specifically, the solar hot water supply connection unit C has a connection port (solar hot water) for connecting the solar hot water supply passage 70, the water supply passage 80, and the water supply passage 21 of the main water heater A to the unit C. A water inlet 91, a water inlet 92, and a hot water outlet 93) are provided, and the pipes constituting the solar hot water supply passage 70 and the like are connected to these connection ports by a connecting means (not shown) such as a pipe joint. ing. Incidentally, 94 and 95 shown in FIG.
Indicates a water inlet on the main water heater A side and a water outlet on the solar water heater B side, respectively.

And this solar hot water supply connection unit C
The solar hot water supply passage 70 is provided with an opening / closing valve 62 composed of an electromagnetic opening / closing valve, etc. By fully closing the opening / closing valve 62, the solar hot water from the solar water heater B can be shut off. There is.

The solar hot water supply passage 70 is provided with a solar hot water temperature sensor 63 for detecting the temperature of the hot water supplied from the solar water heater B, and the water supply passage 80 of the solar hot water supply connection unit C is provided. A water supply temperature sensor 64 for detecting the temperature of the water supplied from the water source is provided, and the water inlet 21 of the solar hot water supply connection unit C is further provided.
Is provided with a hot water temperature sensor 65 for detecting the temperature of water flowing out from the mixing control valve 61. The temperature information detected by the temperature sensors 63, 64, 65 is input to the solar hot water supply connection controller 60.

The solar hot water supply connection controller 60 controls the operation of the solar hot water supply connection unit C and is composed of a microcomputer.
A known communication means such as a modem is provided so as to communicate with the main controller 30 and the like. Then, based on information such as the detected temperature information and control information received from the main controller 30, the mixing ratio of the mixing control valve 61 can be adjusted, and the opening / closing operation of the opening / closing valve 62 can be controlled. Further, the solar hot water supply connection controller 60 is provided with a storage unit such as a RAM (not shown) for storing the minimum working water amount detection data described later.

On the other hand, the solar water heater B is a device for supplying hot water by utilizing solar heat and has a known structure. That is, in addition to the solar hot water supply passage 70, a solar heat exchanger 71, a hot water storage tank 72, and the like are provided. The hot water supply passage 70 is extended. And solar heat exchanger 7
The medium heated in 1 is introduced into the hot water storage tank 72 to heat and heat the water in the hot water storage tank 72 into hot water, and the hot water in the hot water storage tank 72 passes through the solar hot water supply passage 70 and the solar hot water supply connection unit. Supplied to C.

Next, the basic hot water supply operation of the solar hot water supply apparatus having the above-described structure will be described first with reference to the flowchart of FIG. 2, and thereafter, the hot water supply stop of the auxiliary water heater according to the present invention will be stopped. The determination method will be described.

A. Basic hot water supply for solar water heater
Hot water operation: (1) First, after confirming that the main water heater A and the solar water heater B are turned on, the solar water heater connection unit C is turned on to turn on the solar water heater connection unit C. Remote control 5
No. 0 hot water supply operation switch is turned on (FIG. 2 step S
1). Thereby, based on the instruction from the remote controller 50, ON information of the hot water supply operation switch and hot water supply set temperature information are communicated from the main controller 30 to the solar hot water supply connection controller 60.

(2) At this point, the open / close valve 62 for shutting off the water flow from the solar water heater B is fully closed, and the mixing control valve 61 is in a fully open state on the water side (water supply passage 80 side). Therefore, the mixing operation of the solar hot water and water in the mixing control valve 61 is not performed at this time.

(3) Then, the user of the apparatus opens, for example, the hot water supply scallop 22b on the main water heater A side or the drop opening / closing valve 25a for bath automatic hot water supply, and the water flow switch 21b of the main water heater A turns on the main water heater. When the water flow exceeding the minimum operating water amount of the water heater A is detected, the minimum operating water amount detection signal (MOQ signal) on the main water heater A side is turned on (step S3 in FIG. 2). This MOQ signal is a signal that is sent out when the minimum amount of working water required to operate the main water heater A is detected, and in the present embodiment, as will be described later, this main water heater A is used.
The operation of the on-off valve 62 and the mixing control valve 61 is controlled by using the MOQ signal of. In addition, this MOQ
The signal generation circuit is a well-known circuit that is usually provided in a general water heater.

(4) Then, the MOQ signal of the main water heater A is
Similar to the ON information of the hot water supply operation switch, the main controller 30 of the main water heater A communicates with the solar hot water connection controller 60 of the solar hot water supply connection unit C.
In the solar hot water supply connection unit C, when this MOQ signal is turned on, based on a command from the solar hot water supply connection controller 60, the opening / closing valve 62 is opened to start receiving the solar hot water from the solar water heater B, and the mixing is performed. Control of the regulating valve 61 is started (step S4 in FIG. 2).

Here, the mixing control valve 61 is controlled by the hot water supply set temperature information received by the solar hot water supply connection controller 60, the solar hot water temperature information from the solar hot water temperature sensor 63, and the hot water temperature information from the hot water temperature sensor 64. And based on. That is, the solar hot water supply connection controller 60, based on these information,
In order to bring the temperature of the solar hot water sent to the main water heater A to the hot water supply set temperature, the mixing ratio of the mixing control valve 61 is calculated, and the calculated mixing ratio is used as an operation command for the mixing control valve 61.
Communicate to.

The solar hot water supply connection controller 60
When the hot water supply temperature can be adjusted using solar hot water in the calculation of the mixing ratio, that is, when the solar hot water temperature is higher than the hot water supply set temperature, the main controller 30 burns the main water heater A. A signal indicating that operation is unnecessary (combustion operation unnecessary command signal) is returned. When the main controller 30 receives this combustion operation unnecessary command signal,
The main water heater A does not perform combustion operation, but starts hot water supply only with hot water supplied from the solar water heater connection unit C. That is, in the present embodiment, when the combustion operation unnecessary signal is not returned from the solar hot water supply connection controller 60, or when the solar hot water temperature is lower than the hot water supply set temperature, the signal requesting the combustion operation from the solar hot water connection controller 60. Main controller 3 only if is issued
Since 0 causes the burner 11 of the heat exchange can body 10 of the main water heater A to perform combustion operation, the main water heater A can perform efficient combustion operation without waste.

Even when the main water heater A does not initially perform the combustion operation, if the hot water supply set temperature is changed during the operation of the present apparatus, the changed hot water supply set temperature information is sent from the main controller 30. The solar hot water supply connection controller 60 communicates with the solar hot water supply connection controller 60 and the information is shared between the main controller 30 and the solar hot water supply connection controller 60. Therefore, the solar hot water supply connection controller 60 operates the mixing control valve 61 based on the new hot water supply set temperature. The control is performed, and the main water heater A also starts the combustion operation as necessary.

(5) When the MOQ signal of the main water heater A does not turn on when the hot water supply operation switch is turned on, the open / close valve 62 of the solar hot water supply connection unit C is fully closed, and the mixing adjustment is performed. The valve 61 is fully opened on the water side and continues to stand by (step S5 in FIG. 2).

When an unheated water supply request (water request signal), that is, water is requested by the remote controller 50, the main controller 30 communicates the water request signal to the solar hot water supply connection controller 60. Upon receiving the water request signal, the solar hot water supply connection controller 60 controls the operation of the mixing adjustment valve 61 so that the water side is fully opened. Therefore, even when the solar water heater B is connected to the main water heater A, it is possible to appropriately supply water according to the request of the device user.

B: For the hot water supply stop determination method on the auxiliary water heater side
Operation when determining hot water supply stop: Next, a method of determining hot water supply stop on the auxiliary water heater side in the solar water heater with a hot water supply function according to the present invention and a control operation when determining hot water supply stop will be described.

That is, as described above, when the hot water supply from the solar water heater B is stopped due to the piping freeze of the solar water heater B or the failure of the on-off valve 62, the water from the water source is supplied from the mixing control valve 61. Is flooded intermittently. Therefore, in the solar hot water supply device with a solar water heater function according to the present invention, the solar hot water connection controller 60 detects this intermittent water discharge and determines the hot water supply stop on the solar water heater side by the following procedure.

(1) When the hot water supply operation switch of the remote controller 50 is turned on while the hot water supply from the solar water heater side is stopped (step S1 in FIG. 3), first the MOQ signal in the main water heater A is turned on. Is determined (step S2 in FIG. 3). That is, by determining whether the MOQ signal is on or off, it is determined whether or not the main water heater A detects water flow of a minimum operating water amount or more. If water flow is detected, the process proceeds to the next step S3. If there is no water flow, the process returns to step S2.

(2) When the MOQ signal is on, M
It is determined whether or not the OQ signal is turned on / off within a predetermined time. Specifically, first, in step S3 of FIG. 3, it is determined whether or not 3 seconds or more have elapsed from the time when the previous MOQ signal was turned on, and similarly, in the subsequent step S4 of FIG. Is determined within 25 seconds. This is M when the hot water supply from the solar water heater is stopped.
Since the OQ signal repeats on / off at a constant cycle, the time interval from the previous MOQ signal on to the current MOQ signal on is detected, and the MOQ signal on / off cycle is associated with the hot water supply stop. It is to determine whether or not In addition, in detecting the ON / OFF period of the MOQ signal, the reason for setting it to 3 seconds or more and 25 seconds or less is that the water heater used when the applicant experimented with the present invention was
This is because it was found that the ON / OFF of the MOQ signal is repeated in this range when the solar-side hot water supply is stopped, and this value can be set appropriately for each hot water supply device actually used.

(3) When it is determined in steps S3 and S4 in FIG. 3 that the MOQ signal is turned on / off within the predetermined time, the MOQ signal detected this time is turned on in step S5 in FIG. The solar hot water supply connection controller 6 has the ON / OFF cycle as the minimum working water amount detection signal data (hereinafter referred to as MOQ signal data) ta (seconds).
It is stored in the RAM (not shown) in 0.

(4) Next, in step S6 of FIG. 3, the stored MOQ signal data ta and the previously detected R
The MOQ signal data tb stored in the AM is compared,
It is determined whether the deviation is a predetermined value (1 second in the illustrated example) or less. Here, the reason why the deviation between the two data ta and tb is obtained is to determine whether or not the cycle of ta and the cycle of tb are the same cycle, and the predetermined value is set to 1 second in the illustrated example. This is because, if there is an error in this range, it is unlikely that an error will occur in the determination of the hot water supply stop on the solar water heater side even if the same cycle is determined. Therefore, this value can also be appropriately changed within a range that does not cause an error in the determination of the hot water supply stop on the solar water heater side.

(5) If it is determined that the deviation is within 1 second, the error counter is counted in step S7 of FIG.

(6) When the count of the error counter reaches a predetermined number (10 times in the illustrated example) (step S8 in FIG. 3), it is determined in the subsequent step S9 in FIG. 3 that the hot water supply on the solar water heater side is stopped. With, for example,
An alarm display request signal is sent to an alarm means of the main water heater A (not shown), an alarm means of the remote controller 50, and the like. That is, the error counter reaches the predetermined number of times as shown in FIG.
This is because ON / OFF of the MOQ signal indicating the stop of hot water supply on the solar water heater side detected in steps S2 to 6 is continuously detected for a certain period of time. In such a case, piping on the solar water heater side This is because it is determined that the valve is frozen or the on-off valve 62 is out of order.

The steps S3, S4 and S6 shown in FIG.
If a negative determination is made in step 3, it is determined that the ON / OFF cycle of the MOQ signal is not constant, so the count of the error counter is canceled (reset) in step S10 of FIG. If the MOQ signal is turned off in this state, the process returns to step S2 in FIG.
It waits until the signal is turned on (that is, until intermittent water discharge again occurs) (step S11 in FIG. 3). The same applies when the error counter does not count a predetermined number of times in step S8 of FIG.

As described above, in the present embodiment, by monitoring the ON / OFF cycle of the MOQ signal of the main water heater A, the amount of water output from the mixing control valve 61 is monitored for fluctuations, and the fluctuations are predetermined. When repeated in a cycle, it is determined that the hot water supply on the solar water heater side is stopped. Therefore, when monitoring the amount of water output of the mixing control valve 61, it is possible to determine the stop of the hot water supply without the need for a water amount sensor for detecting the amount of water on the water output side of the mixing control valve 61.
When detecting the off period, the above-mentioned predetermined time is 3 seconds or more 25
Since it is set as short as within seconds (step S3 in FIG. 3,
(See S4), the hot water supply stop on the solar water heater side can be reliably determined without erroneous detection even in the case of opening and closing a hot water supply plug such as a curran.

Although not shown, as will be described later, when it is determined that the hot water supply on the solar water heater side is stopped, the mixing control valve 61 is controlled so that the water side is opened and fixed. The intermittent water discharge on the side can be eliminated and a certain amount of water can be stably supplied to the main water heater. As a result, the main water heater performs the combustion operation, so that the hot water set by the remote controller 50 can be supplied in a stable state.

Embodiment 2 In the second embodiment of the present invention, when the stoppage of hot water supply on the solar water heater side in the solar water heater with a solar hot water supply function of the first embodiment is judged, the water inlet temperature of the mixing control valve 61 and The temperature difference of the outlet water outlet temperature is added to the determination element, and specifically, the determination of the hot water supply stop on the solar water heater side is performed according to the flowchart shown in FIG.

(1) That is, first, when the hot water supply operation switch of the remote controller 50 is turned on while the hot water supply from the solar water heater side is stopped (step S1 in FIG. 4),
It is determined whether or not the MOQ signal in the main water heater A is on (step S2 in FIG. 4), and if the MOQ signal is on, whether or not the MOQ signal is turned on / off within a predetermined time. Is judged (step S3 in FIG. 4).
S4), which is the same as that in the first embodiment.

(2) When it is determined in steps S3 and S4 of FIG. 4 that the ON / OFF cycle of the MOQ signal is within the predetermined time, in the subsequent step S5 of FIG. The water inlet temperature and the water outlet side water outlet temperature are compared, and it is determined whether or not the temperature difference between them is within a predetermined value (3 ° C. in the illustrated example). This is because, as described above, when the hot water supply from the auxiliary water heater side is stopped, there is almost no temperature change between the water side inlet temperature and the outlet side outlet temperature of the mixing control valve 61. This is because it can be determined that there is no hot water supply from the solar water heater side as long as the difference between the two temperatures is not so large. Further, the reason why the predetermined value is set to 3 ° C. is that the mixing control valve 61
If hot water is supplied from the solar water heater side to the water heater, it is considered that the water supplied from the water supply passage 80 undergoes a certain temperature change (temperature rise) when passing through the mixing control valve 61. This is because it is not determined that the hot water supply from the solar water heater side is stopped in such a case, and the specific numerical value here can be appropriately changed according to the hot water supply temperature of the auxiliary water heater B and the like. The water inlet temperature and the outlet water outlet temperature of the mixing control valve 61 are detected by the water supply temperature sensor 64 and the hot water temperature sensor 65, respectively.

(3) If the deviation between the water-side inlet temperature and the outlet-side outlet temperature is within 3 ° C., the ON / OFF cycle of the MOQ signal detected this time is determined in step S6 in FIG. The MOQ signal data ta (seconds) is stored in the RAM in the solar hot water supply connection controller 60.

(4) After that, the stop of the hot water supply from the solar water heater side is determined by the same method as in the case of the first embodiment, and the alarm display request signal is sent to the external alarm means. (See step S7 to step S10 in FIG. 4). Further, the error counter is reset in a predetermined case (step S11 in FIG. 4), and is returned to the initial state when the MOQ signal is turned off (step S12 in FIG. 4), as in the first embodiment.

As described above, in the hot water supply device with a solar hot water supply function according to the second embodiment, when the stop of the hot water supply from the solar water heater side is determined, the water of the mixing control valve 61 is added in addition to the determination method of the first embodiment. By considering the temperature difference between the side inlet temperature and the outlet side outlet temperature, it is expected that the accuracy of the stop determination of the hot water supply from the solar water heater side will be improved as compared with the case of the first embodiment.

Embodiment 3 In the third embodiment according to the present invention, when determining whether to stop the hot water supply on the solar water heater side in the solar water heater with the solar hot water supply function of the first embodiment, first, according to the normal procedure, the hot water is first supplied. When it is determined that the supply has been stopped, only the control for stabilizing the intermittent water discharge of the mixing control valve 61 is temporarily performed, and then, when it is determined that the supply of hot water from the solar water heater side is continuously determined. The warning display request signal is transmitted when it is determined that the hot water supply from the solar water heater will be stopped.

(1) That is, the operation of the solar water heater with solar hot water supply function according to the third embodiment will be described with reference to the flowchart of FIG. 5. First, the hot water supply from the solar water heater side is stopped. In this state, when the hot water supply operation switch of the remote controller 50 is turned on (step S in FIG. 5).
1), it is determined whether or not the MOQ signal in the main water heater A is turned on (step S2 in FIG. 5), and when the MOQ signal is turned on, in the subsequent steps S3 and S4 in FIG. Is performed within a predetermined time. If a positive determination is made in steps S3 and S4 in FIG. 5, the ON / OFF cycle of the MOQ signal detected this time is stored in the RAM in the solar hot water supply connection controller 60 as the MOQ signal data ta (second). At the same time (step S5 in FIG. 5), it is compared with the previously detected MOQ signal data tb, and when the deviation is equal to or less than a predetermined value (step S6 in FIG. 5), the first error counter is counted (FIG. 5 step S7), it is the same as in the first embodiment that it is determined whether or not the value reaches a predetermined number (three times in the illustrated example) (step S8 in FIG. 5).

However, the present embodiment is different from the first embodiment in that the error counter is composed of the first error counter and the second error counter, and the count of the first error counter is different. The number is set to 3 times, which is smaller than that in the first embodiment. this is,
In the present embodiment, as will be described later, it is up to the count result of the second error counter to finally determine the stop of the hot water supply from the solar water heater side.
This is because the error counter (1) counts only for controlling the mixing control valve 61, so that the number of counts is reduced and the mixing control valve 61 is controlled as early as possible to stabilize the hot water supply operation.

(2) That is, in this embodiment, when the count of the first error counter reaches a predetermined value, the mixing control valve 61 is fixed with the water side opened as shown in step S9 of FIG. At the same time, the second error counter is counted. The reason why the mixing control valve 61 is fixed on the water side is
In step S8 in FIG. 5 described above, the first error counter has reached a predetermined value, so it is tentatively determined that the hot water supply from the solar water heater side is stopped, and the water side of the mixing control valve 61 is opened and fixed, This is for stabilizing the amount of water output from the mixing control valve 61 in a constant state.

(3) Then, in step S10 of FIG. 5, it is determined whether or not the count of the second error counter has reached a predetermined number (10 times in the illustrated example), and it is determined that the predetermined number has been reached. Only in the case, the stop of the hot water supply from the solar water heater side is finally determined, and the alarm display request signal is sent to the external alarm means (FIG. 5, step S1).
1).

(4) Then, steps S3 and S in FIG.
If the negative judgment is made in S4, S1
And the second error counter is reset (step S12 in FIG. 5). When the results of steps S8 and S10 of FIG. 5 are negative and the MOQ signal is off (step S13 of FIG. 5), the water side of the mixing control valve 61 fixed at the water side open in step S9 of FIG. The open fixation is canceled, and the mixing control valve 61 is returned to the normal state (step S14 in FIG. 5) so that the normal hot water supply operation is possible.

As described above, the stop of the hot water supply from the solar water heater is determined in two stages. When the stop of the hot water supply from the solar water heater side is due to, for example, the freezing of the piping, the nighttime temperature is lowered. However, when the temperature rises during the day, the water in the piping that was frozen may be thawed and the hot water supply from the solar water heater side may be restarted. In consideration of this, when pipes are frozen at night, the mixing control valve 61 is fixed to the water side by the above step S9 in FIG. 5 and water from the water source is supplied to the main water heater A, and the water in the pipes is melted. In the meantime, a negative determination is made in step S10 in FIG. 5, and the fixing of the mixing control valve 61 on the water side is canceled to allow normal use. Moreover, in the present embodiment, the stop of the hot water supply is determined in two stages in this way, so that the stop of the hot water supply can be determined more accurately and more accurately than in the case of the first embodiment, even when the pipe is not frozen.

Embodiment 4 In the fourth embodiment of the present invention, the hot water discharged from the solar hot water supply connection unit C is added between the solar hot water supply connection unit C and the main water heater A of the hot water supply apparatus with solar hot water supply function. The method of determining hot water supply stop from the solar water heater side when the pressurization unit D that supplies pressure to the main water heater A is provided is shown. Particularly, in the fourth embodiment, the hot water supply from the solar water heater side is shown. At the time of the stop determination, the supply water temperature of the water inlet 80 is detected, and the possibility of freezing of the pipe is determined from this supply water temperature, and different determination methods are used.

That is, in the fourth embodiment, between the solar hot water supply connection unit C and the main water heater A, as shown in FIG. 6, a pressure pump 110, a check valve 111, an accumulator 112, and a pressure switch. The pressurizing unit D including the 113 and the flow switch 114 is interposed, and the water output from the solar hot water supply connection unit C is pressurized by the pressurizing means such as the pump 110 and the accumulator 112 and supplied to the main water heater A. Has been done. Therefore, in the fourth embodiment, the first embodiment described above is used.
Even if the ON / OFF cycle of the MOQ signal is detected as in the case of No. 3 to 3, the ON / OFF timing of the MOQ signal itself does not coincide with the intermittent water discharge timing from the mixing control valve 61. Comparison of on / off period (t
Even if (a and tb are compared), the stop of hot water supply from the solar water heater side cannot be accurately detected.

Therefore, in the fourth embodiment, in determining whether or not the detected ON / OFF cycle of the MOQ signal is the same cycle as the previous ON / OFF cycle of the MOQ signal, a preset past value is set. Multiple times (eg, Figure 8
In step S4, MOQ signal data ta of the past five times)
And the minimum working water amount detection signal addition data (hereinafter, M
It is stored as Da, which is referred to as OQ signal addition data), and is compared with the reference data Ds (for example, 60 seconds in step S5 in FIG. 8) preset according to the number of times of addition, so that the pressurizing means is interposed. The timing deviation of the MOQ signal is absorbed by. That is, in the fourth embodiment, when detecting the ON / OFF cycle of the MOQ signal, the deviation of the ON / OFF cycle caused by the intervening pressurizing means is taken into consideration in advance, and the MOQ signal data ta to be detected is divided into a plurality of times. By using addition, the effect of the above deviation is mitigated. The reference data Ds set here is obtained by previously measuring the ON / OFF cycle of the MOQ signal generated when the hot water supply from the solar water heater side is stopped, and includes an allowable error in the cycle. It is calculated by multiplying the number of times according to the number of times of addition.

The following is a description of the solar hot water supply side hot water supply stop determination method and the operation at the time of hot water supply stop determination in the solar hot water supply function-equipped hot water supply apparatus according to the fourth embodiment, with reference to FIG.
Through the flowchart shown in FIG. 9 to FIG.

(1) First, when the hot water supply operation switch of the remote controller 50 is turned on with the hot water supply from the solar water heater side stopped (step S1 in FIG. 7), the MOQ signal in the main water heater A is turned on. It is determined whether or not is on (step S2 in FIG. 7).

(2) Next, in step S3 of FIG. 7, it is determined whether or not the mixing control valve 61 is jumper set to be fixed on the water side. This is in consideration of a water heater that has a jumper setting that sets the mixing control valve 61 to the water side in advance when there is a high risk of pipe freezing such as in winter. 7 The operation is switched to the water side fixed mode in step S5, and the following operations are not performed. On the other hand, if the jumper setting is not fixed on the water side, or if there is no such jumper setting, the process proceeds to step S4 in FIG.

(3) In step S4 of FIG. 7, it is determined whether or not the feed water temperature detected by the feed water temperature sensor 64 has reached a predetermined temperature (7 ° C. in the illustrated example). In the illustrated example, it is determined whether or not the temperature is 7 ° C. or lower, and if negative, the process proceeds to the flowchart of FIG. 8, and if positive, the process proceeds to the flowchart of FIG. 9. In addition, the reason why the predetermined temperature is set to 7 ° C. here is that the applicant has determined that the pipe may be frozen when the temperature of the water flowing through the water supply passage 80 is 7 ° C. or less. Therefore, this predetermined temperature can be freely set and changed within a range where it is determined that there is a risk of pipe freezing.

(4) Next, in step S7 of FIG. 7, if the temperature is 7 ° C. or higher, that is, if the determination in step S7 is negative,
In subsequent step S1 and step S2 of FIG.
It is determined whether or not the ON / OFF of the Q signal is performed within a predetermined time, and when the result is affirmative, the ON / OFF cycle of the MOQ signal detected this time is stored as the MOQ signal data ta (step in FIG. 8). S3).

(5) Then, in the subsequent step S4 of FIG. 8, the past 5 including the MOQ signal data ta detected this time is included.
The MOQ signal data for the times are added and stored as MOQ signal addition data Da.

(6) Then, in step S5 of FIG.
This MOQ signal addition data Da and the reference data Ds (60 seconds in the illustrated example) are compared, and when it is determined that the reference data Ds or less, the mixing control valve 61 is fixed at the water side fully open in the subsequent step S6 in FIG. At the same time, an operation command for closing the opening / closing valve 62 is issued, and the second error counter is counted. Here, the second error counter is counted by fixing the mixing control valve 61 at the water side fully open, as in the case of the third embodiment. In the fourth embodiment, the stop of hot water supply from the solar water heater side is determined based on the MOQ signal addition data added in step S5 of FIG.
No error counter is provided. Although the reference data Ds is set to 60 seconds here, it is needless to say that this numerical value can be changed appropriately according to the number of additions of the MOQ signal data.

(7) Then, when the second error counter counts a predetermined number of times (10 times in the illustrated example), it is finally determined that the open / close valve 62 is in failure, and the alarm display request signal indicating the failure is issued. It is sent (step S8 in FIG. 8). The reason why the on-off valve 62 is determined to be defective is that it is determined in step S4 in FIG. 7 that there is no risk of pipe freezing. On the other hand, if the second error counter does not reach the predetermined number of times, the process proceeds to step S9 in FIG.
It is determined whether or not the time until the signal turns off and then turns on again is within 3 minutes (step S9 to step S9 in FIG. 8).
11) If it is determined that the MOQ signal has been off for 3 minutes or more, the mixing control valve 61 and the opening / closing valve 62 are returned to the normal state, and the process returns to step S2 in FIG. Here, it is determined whether or not the MOQ signal is off for 3 minutes or more, because when the MOQ signal is off for a long time, it is not necessary to consider the deviation due to the pressurizing means. is there. Therefore, this numerical value can also be changed as appropriate.

(8) If the negative judgment is made in step S1 of FIG. 8, the MOQ signal data is not stored (step S12 of FIG. 8), and the negative judgment is made in step S5 of FIG. MO is issued
When the Q signal is turned off, the process returns to step S2 in FIG. 7 (step S13 in FIG. 8). If a negative determination is made in step S2 of FIG. 8, it is determined in step S14 of FIG. 8 whether or not 30 seconds or more have elapsed since the previous MOQ signal was turned on. Since it is determined that the off cycle is not within the predetermined time, the second error counter is reset (step S15 in FIG. 8), and the current MOQ
The signal data is stored as 60 seconds (step S in FIG. 8).
16), and proceeds to step S4 in FIG. Therefore, in this case, the determination in subsequent steps S4 and S5 in FIG.
Since it exceeds the second, the process proceeds to step S13 and M
When the OQ signal is turned off, the process returns to step S2 in FIG.

(9) On the other hand, when it is determined in step S4 in FIG. 7 that the water supply temperature of the water supply passage 80 is 7 ° C. or lower,
Proceed to the flowchart of FIG. The procedure shown in FIG. 9 is basically the same as the procedure shown in the flow chart of FIG. 8 above. However, the cause of stopping the hot water supply from the solar water heater side when the water supply temperature is 7 ° C. or lower is due to the open / close valve. Since there is a higher possibility that the piping is frozen than the failure of 62 (that is, the on-off valve 62 is often not in failure), the failure determination of the on-off valve 62 as shown in FIG. No request signal is sent. Therefore, in the following, differences from the flowchart in FIG. 8 will be mainly described.

First, when it is determined that the water supply temperature of the water supply passage 80 is 7 ° C. or lower, the second error counter is reset in step S1 of FIG. This is to return the count of the second error counter to the initial state because the failure determination of the opening / closing valve 62 is not performed when the supply water temperature is 7 ° C. or lower.

Then, from step S2 to step S in FIG.
4 is carried out in the same manner as in the case of FIG. 8, and step S of FIG.
In 5, the past MOQ signal data including this time is added (the MOQ signal addition data here is Db).
Here, the MOQ signal data t in step S5 of FIG.
The reason that the number of times a is added is two times in the past, because there is a high possibility that the piping will freeze if the water temperature is below 7 ° C.
This is because the hot water supply stoppage can be detected earlier than usual by reducing the number of additions. Therefore, in the subsequent step S6 in FIG. 9, the MOQ signal addition data Db is added.
The reference data Ds compared with is also 30 compared with the case of FIG.
Set as short as seconds.

When it is judged by the comparison with the reference data Ds in step S6 of FIG. 9 that the hot water supply from the solar water heater side is stopped, the mixing control valve 61 in step S7 of FIG. 9 is fixed at the water side fully open. At the same time, a control operation of closing the on-off valve 62 is performed. Since the failure determination of the on-off valve 62 is not performed here as described above, the second error counter is not counted in step S7 of FIG. Therefore, when the hot water supply stop from the solar water heater side is detected when the water supply temperature is 7 ° C or lower,
Only the operation of stabilizing the amount of water on the water outlet side of the mixing control valve 61 is performed, and the main water heater A performs the combustion operation, so that stable hot water supply is possible.

Other operations in steps S8 to S13 in FIG. 9 are similar to those in FIG.

As described above, according to the present embodiment, the case where the risk of freezing of the pipe is high and the case where the risk of freezing is low are determined by different settings. Therefore, an appropriate auxiliary water heater depending on the environment in which the water heater is used. In addition to the hot water supply stop judgment, MOQ
Since the hot water supply stop determination on the auxiliary water heater side is performed by adding the signal data, it is possible to perform the hot water supply stop determination with high accuracy even if a pressurizing means or the like intervenes.

The above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope.

For example, in the above-described second embodiment, the temperature difference between the water-side inlet temperature and the water-outlet side outlet temperature is added to the determination method of the first embodiment as a determination factor. The present invention can be appropriately combined. For example, the control operation at the time of hot water supply stop determination on the auxiliary water heater side shown in the third embodiment can be applied to other embodiments. .

In the above embodiment, the solar water heater is used as the auxiliary water heater, but it is also possible to use other types of water heaters as the auxiliary water heater, and the main water heater is used as the alarm means. Although the remote controller 50 of the water heater A is used, it is also possible to use an alarm means such as a home controller in home automation, which is separate from the water heater.

In the heat exchange can body 10 of the main water heater A,
The bath heating equipment such as the bath reheating circulation path 40 does not necessarily have to be connected, while the main water heater A may be provided with another heating circulation path or another circuit.

Further, although the heat exchange can body 10 is of the instant heating type in this embodiment, it may be a so-called semi-hot water storage type heat exchange can body. In this case, the hot water supply circuit 2
Instead of the heat exchange coil 23 of 0, a relatively small hot water storage tank, that is, a semi-hot water storage tank is arranged, and the water in the hot water storage tank is heated and used for hot water supply. The heat exchange coils 43 and the like of the other bath reheating circulation path 40 are heat exchange heated by the hot water in the semi-hot water storage tank.

Further, the burner 11 may be a petroleum burner or a gas burner. Also, the type of burner does not matter.

[0094]

As described above in detail, according to the hot water supply stop determination method for the auxiliary hot water supply device of the hot water supply device with the auxiliary hot water supply device according to the present invention, the hot water supply to the mixing control valve due to the freezing of the pipe or the failure of the on-off valve can be performed. The outage can be determined accurately and quickly.

According to the auxiliary hot water supply side hot water supply stop determination method according to the sixth aspect, it is possible to adopt an auxiliary hot water supply side hot water supply stop determination method different from the normal time in the winter when piping freeze is expected. A proper determination method can be adopted by predicting the cause of hot water supply stoppage from the auxiliary water heater.

Further, according to the hot water supply apparatus with the auxiliary hot water supply device according to the seventh aspect, it is possible to stabilize the intermittent water discharge caused by the stop of hot water supply from the auxiliary hot water supply device, and the season valve which has been required until now. According to the invention of claim 8, when the hot water supply stop from the auxiliary water heater is determined, an alarm display request signal is sent to an external alarm means. The hot water supply stoppage from the auxiliary water heater can be immediately recognized, and the failure can be detected and resolved early.

Further, according to the hot water supply apparatus with the auxiliary hot water supply device according to the eighth aspect, the determination of the hot water supply stop from the auxiliary hot water supply device is performed in two steps, so that more accurate determination of the hot water supply stop can be made, and the first Since the mixing control valve is fixed on the water side when the hot water supply stop determination is made, stable hot water supply can be performed.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a hot water supply device with a solar hot water supply function to which an auxiliary hot water supply side hot water supply stop determination method according to an embodiment of the present invention is applied.

FIG. 2 is a flowchart illustrating a basic hot water supply operation of the solar water heater with a hot water supply function.

FIG. 3 is a flowchart illustrating a first embodiment of an auxiliary water heater-side hot water supply stop determination method in the solar hot water supply device with a hot water supply function.

FIG. 4 is a flowchart illustrating a second embodiment of a method for determining hot water supply stoppage on the auxiliary water heater side in the solar hot water supply device with a hot water supply function.

FIG. 5 is a flowchart illustrating a third embodiment of a method for determining hot water supply stoppage on the auxiliary water heater side in the solar hot water supply device with a hot water supply function.

6 is a configuration diagram showing a schematic configuration of a pressurizing unit installed in the solar hot water supply device with a solar hot water supply function of FIG. 1. FIG.

FIG. 7 is a part of a flowchart explaining a fourth embodiment of the present invention for explaining a method of determining hot water supply stoppage on an auxiliary water heater side in a solar water heater with a hot water supply function including the pressurizing unit.

FIG. 8 is a flowchart showing another part of the flowchart of FIG.

9 is a flowchart showing another part of the flowchart of FIG.

[Explanation of symbols]

A main water heater B solar water heater (auxiliary water heater) C solar water heater connection unit (auxiliary water heater connection unit) 10 heat exchange can body 20 hot water supply circuit 21 water inlet 22 water outlet 30 main controller 40 bath reheating circulation 50 remote control 60 Solar hot water supply connection controller 61 Mixing control valve 62 Open / close valve 63,65 Solar hot water temperature sensor 64 Water supply temperature sensor 70 Solar hot water supply passage (auxiliary hot water supply passage) 80 Water supply passage ta, tb Minimum operating water amount detection signal data Da, Db Minimum operating water amount Detection signal addition data Ds Reference data

Front Page Continuation (72) Inventor Yoshihiko Tanaka 93 Edomachi, Chuo-ku, Kobe-shi, Hyogo Within Noritsu Co., Ltd. (56) Reference JP-A-6-249510 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24D 17/00

Claims (9)

(57) [Claims] 1. A main water heater, an auxiliary water heater for supplying hot water to the main water heater, and hot water supplied from the auxiliary water heater interposed between the main water heater and the auxiliary water heater. An auxiliary water heater connection unit that mixes with water from a water source and supplies it to the main water heater, and the auxiliary water heater connection unit can shut off hot water supplied from the auxiliary water heater via the auxiliary water heater A valve, and a mixing control valve that mix-controls hot water supplied from the auxiliary water heater and water supplied from a water source via a water supply channel downstream of the on-off valve and sends the mixture to the water inlet of the main water heater. In the water heater with an auxiliary water heater, which comprises an auxiliary water heater connection controller that controls the mixing operation of hot water and water in the mixing control valve, the amount of water output from the mixing control valve is monitored to When fluctuations are repeated, hot water is supplied from the auxiliary water heater. Auxiliary water heater hot-water supply stop determination method auxiliary water heater with a hot water supply apparatus characterized by but is determined to be stopped. 2. The auxiliary water heater according to claim 1, wherein the amount of water discharged from the mixing control valve is monitored by monitoring the on / off cycle of the minimum operating water amount detection signal of the main water heater. A method for determining hot water supply stoppage on the auxiliary water heater side of a hot water supply device. 3. A step of determining whether or not the on / off cycle is performed within a predetermined time in monitoring the on / off cycle of the minimum working water amount detection signal, and the cycle is within the predetermined time. In that case, the step of storing the cycle information as the minimum operating water amount detection signal data and the stored minimum operating water amount detection signal data and the previously detected minimum operating water amount detection signal data are compared, and the difference is less than or equal to a predetermined value. Whether the difference between the cycles is less than or equal to a predetermined value, a step of counting an error counter, and when the error counter reaches a predetermined number of times, the hot water supply from the auxiliary water heater is The method for determining hot water supply stoppage of the auxiliary water heater on the side of the auxiliary water heater of the hot water supply apparatus with the auxiliary water heater according to claim 2, further comprising the step of determining that the water heater is stopped. 4. A step of determining whether or not the on / off cycle has been performed within a predetermined time in monitoring the on / off cycle of the minimum working water amount detection signal, and the cycle is within the predetermined time. In that case, the step of storing the cycle information as the minimum working water amount detection signal data and the stored minimum working water amount detection signal data and the past minimum working water amount detection signal data are added to obtain the minimum working water amount detection signal addition data. A step of calculating and a step of comparing the calculated minimum working water amount detection signal addition data with preset reference data to determine whether the difference is a predetermined value or less; The step of counting the error counter when the value is less than or equal to the predetermined value, and the hot water supply from the auxiliary water heater is stopped when the error counter reaches the predetermined number of times. The auxiliary hot water supply side hot water supply stop determination method of the hot water supply apparatus with an auxiliary hot water supply device according to claim 2, wherein 5. A step of determining whether or not the ON / OFF cycle has been performed within a predetermined time in monitoring the ON / OFF cycle of the minimum working water amount detection signal, and the cycle is within the predetermined time. In that case, the step of storing the cycle information as the minimum operating water amount detection signal data and the stored minimum operating water amount detection signal data and the previously detected minimum operating water amount detection signal data are compared, and the difference is less than or equal to a predetermined value. If the difference between the cycles is less than or equal to a predetermined value, the water side inlet temperature and the water outlet side outlet temperature of the mixing control valve are compared and the temperature difference is within a predetermined value. The step of determining whether or not there is, the step of counting an error counter when the temperature difference is within a predetermined value, and the hot water from the auxiliary water heater when the error counter reaches a predetermined number of times. The method for determining hot water supply stoppage on the auxiliary water heater side of the hot water supply device with an auxiliary hot water supply apparatus according to claim 2, comprising a step of determining that the supply is stopped. 6. The auxiliary water heater side hot water supply stop determination method according to any one of claims 1 to 5, prior to the auxiliary water heater side hot water supply stop determination, the water side water inlet of the mixing control valve. A step is provided for determining whether or not the temperature has reached a predetermined temperature, and the auxiliary hot water supply side hot water supply stop determination method having a different set value in each step of the auxiliary hot water supply side hot water supply stop determination method is provided according to the result of the determination. A method for determining stoppage of hot water supply on the auxiliary hot water supply side of a hot water supply apparatus with an auxiliary hot water supply, which is characterized by selecting and using. 7. When the hot water supply from the auxiliary water heater is determined to be stopped by the auxiliary water heater side hot water supply stop determination method according to any one of claims 1 to 5, A water heater with an auxiliary water heater, comprising a control structure for fixing the mixing control valve by opening the water side. 8. When the hot water supply stop determination method according to any one of claims 1 to 5 determines that the hot water supply from the auxiliary water heater is stopped, the mixing control valve is set to water. A hot water supply apparatus with an auxiliary water heater, characterized in that the side is opened and fixed, and a control structure for sending an alarm display request signal to an external alarm means is provided. 9. The hot water supply from the auxiliary water heater is once determined to be stopped by the auxiliary water heater-side hot water supply stop determination method according to any one of claims 1 to 5. In addition to opening and fixing the water side of the mixing control valve,
When the second error counter reaches a predetermined number of times, it is finally judged that the hot water supply from the auxiliary water heater is stopped and an alarm display request signal is sent to an external alarm means. And a control configuration for releasing the fixed state in which the water side of the mixing control valve is opened when the minimum working water amount detection signal is turned off in a state where the second error counter has not reached the predetermined number of times. A hot water supply device with an auxiliary water heater.