JPH0252186B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a water heater with a heating operation function that can perform heating operation using a timer, and in addition to high-temperature operation for heating or hot water supply, it can also be used for freezing prevention. The present invention relates to a temperature control device that can automatically switch between the high temperature operation and the low temperature operation, in which the low temperature operation can also be performed.

<Prior art and its problems> In a water heater that is capable of supplying hot water or heating using high-temperature water in a hot water storage can, the water in the hot water storage can is used to supply hot water or heating. Of course, it is necessary to heat and maintain the water at a high temperature, but on the other hand, it is also necessary to heat and maintain the water in the hot water storage can at a low temperature in order to prevent the equipment from freezing. The former is a high temperature operation, and the latter is a low temperature operation. Conventionally, switching between high-temperature operation and low-temperature operation of the hot water storage can was carried out by manually changing or switching the temperature control knob. However, such conventional methods have the disadvantage that the operation mode must be changed every time the operation is changed from high temperature operation to low temperature operation or from low temperature operation to high temperature operation. In particular, in devices where the heating operation can be performed using a timer, if the operation mode is not automatically changed before and after the timer operation,
The convenience of performing timer operation is reduced.

<Purpose> Therefore, the present invention solves the drawbacks of the above-mentioned prior art, and enables the water heater to be turned on and off, the heating operation switch to be turned on and off, the low temperature operation switch to be turned on and off, and the timer operation switch to be turned on and off. ,
When the switch is turned on and off, the priority of whether to operate the hot water storage tank at high temperature or low temperature is set as appropriate for use, and each time the operation mode is changed, the switch is turned on or off. There is no need to manually repeat the off operation.
The purpose of the present invention is to provide a temperature control device for a water heater with a heating operation function that is extremely convenient and easy to use.

<Means for Solving the Problems> The present invention has a hot water supply function that controls high-temperature water from the hot water storage can to a temperature set by an electric mixing valve and dispenses hot water. A heating operation function capable of stopping the circulation of hot water heat-exchanged to the radiator after a predetermined time, or starting the circulation from a predetermined time, or a combination thereof, and storing hot water for the hot water supply and heating. Temperature control for water heaters with a heating operation function that allows for high-temperature operation that heats and maintains the hot water inside the can at a set high temperature, and low-temperature operation that heats and maintains the hot water inside the hot water storage can at a low temperature to prevent freezing. The control device switches between the high-temperature operation and the low-temperature operation, and during the heating operation by the timer, the high-temperature operation is performed regardless of whether the low-temperature operation switch is turned on or off, and in other cases, the low-temperature operation switch is turned on. The basic feature is that the system is configured to operate at a low temperature regardless of whether the heating operation switch is turned on or off.

<Function> Provided that the operation switch of the hot water storage can is on, if the heating operation switch is off, and even if the heating operation switch is on but the timer is not operating, the low temperature operation switch is turned on. If it is on, it will be operating at a low temperature, and if the low temperature operation switch is off, it will be operating at a high temperature.

Furthermore, if the operation switch is on, the heating operation switch is on, and the timer is running, while heating operation is currently being performed by the timer, high temperature operation will occur regardless of whether the low temperature operation switch is on or off. When heating operation is not performed, low temperature operation occurs if the low temperature operation switch is on, and high temperature operation occurs when the low temperature operation switch is off. Therefore, for example, when a user uses a timer to perform heating operation at night in winter, if the user turns on the low temperature operation switch at the same time, the operation mode will switch to low temperature operation as soon as the timer heating operation ends, and the freezing prevention will continue. will be held. Also, if you turn on the low temperature switch when setting the timer to turn on the heating tomorrow morning, freezing will be prevented by low temperature operation from tonight until tomorrow morning.
After that, the operation mode is switched to high temperature and heating starts.

<Example> Fig. 1 is an overall configuration diagram showing an example of the present invention, Fig. 2 is a flowchart showing an example of temperature control control, and Fig. 3 is a flowchart showing an example of temperature control control.
The figure is an electric circuit diagram of the remote control section and the control section, and FIG. 4 is a flowchart showing a more specific example of temperature control during timer operation.

Reference numeral 1 denotes a hot water storage can, in which supplied water is heated and stored. A burner 2 heats the hot water storage can 1. Hot water is supplied by adjusting high temperature water from the hot water storage can 1 and low temperature water from the water supply pipe to a predetermined hot water temperature set by an electric mixing valve 3. Heating is performed by circulating high-temperature water, which has undergone heat exchange in the hot water storage can 1, through a circulation path 4 to a radiator 6 at a destination by a circulation pump 5. 7 is a temperature detector for the hot water storage can 1.

In FIGS. 1 and 3, the remote control unit 8 includes an operation switch 9 for the hot water storage can 1 and its operation confirmation lamp 9a, a combustion confirmation lamp 10a for confirming the combustion state of the burner 2, and a combustion confirmation lamp 10a for confirming the combustion state of the burner 2. temperature control switch 11 for turning up, temperature control switch 12 for turning down to lower the outlet temperature, its temperature control setting circuit 13 and temperature control setting display lamp 14, low temperature operation switch 15 for freezing prevention and its low temperature operation lamp 15a, A heating operation switch 16, its heating operation confirmation lamp 16a, and a microcomputer (hereinafter referred to as microcomputer) that determines whether to operate the hot water storage can body 1 at a high temperature or at a low temperature and instructs the control unit 20 side.
17, and a timer operation operation section 30 for causing the microcomputer 17 to perform heating operation using a timer.
has. The timer operation operation unit 30 includes a sleep start switch 31 for stopping heating after a predetermined time and a confirmation lamp thereof, and a sleep start switch 31 for stopping heating after a predetermined time, and a confirmation lamp for starting heating at a predetermined time and for a predetermined time (for example, one hour) from the start. Good morning start switch 32 and its confirmation lamp to continue
and a timer setting section 33 for setting the time.

The control unit 20 includes a power supply circuit 21 , a heating control circuit 22 that controls the driving of the circulation pump 5 , a combustion control circuit 23 that controls combustion of the burner 2 , a hot water storage can temperature adjustment circuit 24 that adjusts the temperature of the hot water storage can 1 , Hot water storage can body 1
High temperature and low temperature operation for switching between high temperature and low temperature operation.
Low temperature operation switching circuit 25, electric mixing valve 3
It has an electric mixing valve temperature control circuit 26 for adjusting the hot water supply temperature, and an electric mixing valve drive circuit 27 for controlling the on/off operation of the electric mixing valve 3.

The hot water storage can 1 can be operated by turning on the operation switch 9. In this case, unless the low temperature operation switch 15 is turned on, the hot water storage can 1 is operated at a high temperature. The temperature of the hot water inside the hot water storage can body 1 can be adjusted by inputting a temperature setting value into the hot water storage can body temperature adjustment circuit 24 using an adjustment knob (not shown), for example, and comparing it with temperature information from the temperature detector 7. This can be done by turning on and off the combustion of the burner 2 via the burner 23. The temperature of the hot water in the hot water storage can body 1 is actually, for example, during high-temperature operation.
At a constant value of 80℃, or for example 20℃ during low temperature operation.
It is possible to predetermine the temperature to be a constant value and operate at a constant temperature.

Hot water is supplied via an electric mixing valve 3 by opening a hot water outlet (not shown). The hot water temperature can be adjusted by operating the up temperature control switch 11 or the down temperature control switch 12, and the electric mixing valve 3 connects high temperature water to the temperature control setting circuit 13 via the electric mixing valve temperature control circuit 26. This can be done by changing the mixing rate of low temperature water.

The heating operation is normally performed by turning on the heating operation switch 16 and driving the circulation pump 5 via the microcomputer 17 and the heating control circuit 22.

In addition, low-temperature operation for freezing prevention is normally performed by turning on the low-temperature operation switch 15, which causes the microcomputer 17 to determine the low-temperature operation, and by switching the high-temperature/low-temperature operation switching circuit 25 to the low-temperature operation side, hot water storage is performed. Can temperature adjustment circuit 24, combustion control circuit 23
The combustion of the burner 2 is controlled for low-temperature operation. In this case, if the microcomputer determines that low temperature operation is to be performed, the electric mixing valve drive circuit 2 passes through the high temperature/low temperature operation switching circuit 25.
7 locks the electric mixing valve 3 in the closed state, making hot water supply impossible. Incidentally, the electric mixing valve drive circuit 27 may be configured to lock the electric mixing valve 3 in the previously used position.

The heating operation using the timer can be performed by setting the timer using the timer operation operation section 30. In this case, during the heating operation by the timer, the burner 2 is controlled for high-temperature operation by a command from the microcomputer 17 via the high-temperature/low-temperature operation switching circuit 25 and the combustion control circuit 23. Further, the electric mixing valve 3 is maintained in a usable state via the high temperature/low temperature operation switching circuit 25 and the electric mixing valve drive circuit 27.

Next, an example of a program for automatic switching between high-temperature operation and low-temperature operation of the hot water storage can 1 by the temperature control device of the present invention using a microcomputer will be explained with reference to the flowchart shown in FIG.

Now, when the operation switch 9 of the hot water storage can 1 is on and the heating operation switch 16 is off, when the low temperature operation switch 15 is on, it is a low temperature operation, and when the low temperature operation switch is off, it is a high temperature operation.

Operation switch 9 is on, heating operation switch 16
is on and timer operation is not performed,
In this case, when the low temperature operation switch 15 is on, the operation is at a low temperature, and when the low temperature operation switch 15 is off, the operation is at a high temperature.

Operation switch 9 is on, heating operation switch 16
is on and the timer operation is being performed, in this case, while the timer heating operation is currently being performed, the high temperature operation will be performed regardless of whether the low temperature operation switch 15 is on or off, and the heating operation is currently being performed. If the low temperature operation switch 15 is on when the low temperature operation switch 15 is not being operated, the low temperature operation is performed, and when the low temperature operation switch 15 is off, the high temperature operation is performed.

The range indicated by the one-dot chain line in FIG. 2 is a control flowchart during timer operation, and a more specific example of this part will be explained using the flowchart in FIG. 4. That is, in FIG. 4, the timer operation is performed by turning on the sleep start switch 31 or the morning start switch 32 and setting the time in the timer setting section 33. When the sleep start switch 31 is turned on and the timer is set, the sleep start lamp 31a is turned on and the timer operation is started. Then, until the time set by the timer ends, the low temperature operation switch 15 is turned on and off.
High temperature operation is performed regardless of whether it is turned off or not. When the time set on the timer ends, the timer operation is ended and the sleep start lamp 31 is turned on.
Turn off the light a and proceed to line B in Figure 2. On the other hand, when the good morning start switch 32 is turned on and the timer is set, the good morning start lamp 3
Turn on 2a and start timer operation. Then, until the time set by the timer or until the time comes, low-temperature operation is performed if the low-temperature operation switch 15 is on, and high-temperature operation is performed if the low-temperature operation switch 15 is off. When the time set by the timer arrives, the high temperature operation starts regardless of whether the low temperature operation switch 15 is turned on or off. Then, when a predetermined time (for example, one hour) has elapsed, the high temperature operation by the timer is terminated, the timer operation is terminated, and the good morning start lamp 32a
Turn off the light and proceed to line B in Figure 2.

Next, the lamp display when each of the above operations is performed will be explained.

First, when the operation switch 9 of the hot water storage can 1 is on, the confirmation lamp 9a is lit. Burner 2
If the fuel is burning, the combustion confirmation lamp 10a is lit. The heating operation switch 16 does not necessarily turn on the heating operation confirmation lamp 1 even if it is turned on.
6a does not light up. The heating operation confirmation lamp 16a is lit only when heating operation is actually being performed.
On the other hand, if the low temperature operation switch 15 is on, the low temperature operation lamp 15a is lit even if high temperature operation is currently being performed. Further, the temperature control setting display lamp 14 of the electric mixing valve 3 lights up only when hot water supply is possible due to high temperature operation. Furthermore, the good night start lamp 31a and the good morning start lamp 32a are turned on only while the timer operation is being performed. To summarize, on the premise that the operation confirmation lamp 9a is lit, confirmation that the low temperature operation is in progress can be performed by turning on the low temperature operation lamp 15a, and turning off the heating operation confirmation lamp 16a and the temperature control setting display lamp 14. Further, confirmation that the high temperature operation is in progress can be made by lighting the temperature control setting display lamp 14, regardless of whether the low temperature operation lamp 15a is turned on or off. It can be confirmed that the heating operation is in progress by lighting the heating operation confirmation lamp 16a. Of course, during heating operation, high temperature operation is also being performed, so the temperature control setting display lamp 14 also lights up, indicating that the electric mixing lamp 3 is ready for use (hot water supply is possible. This can be done by lighting the lamp 31a or the good morning start lamp 32a.

<Effects> The present invention has the above-described configuration, and has a heating operation function using a timer in addition to the hot water supply function, and can perform high temperature operation of the hot water storage can for hot water supply and heating, and low temperature operation for freezing prevention. A temperature control device for a water heater with a heating operation function, during heating operation by a timer, high temperature operation is performed regardless of whether the low temperature operation switch is on or off, and otherwise, if the low temperature operation switch is on. Since it is configured to operate at a low temperature regardless of whether or not the heating operation switch is turned on or off, especially when you want to perform a low temperature operation to prevent freezing after a heating operation using a timer, or vice versa, There is no need to switch operations each time, and the operation can be switched automatically. Therefore, for example, when a user uses a timer to perform heating operation at night during winter, if the user turns on the low temperature operation switch at the same time, the operation mode will automatically change from high temperature operation to low temperature operation mode as soon as the timer heating ends. Since the antifreeze operation is performed, the trouble of waking up in the middle of the night to change the switch is eliminated. Also, when you set the timer to turn on the heating tomorrow morning, you can also turn on the low-temperature operation switch, which will prevent freezing during the night and start heating in the morning, which is very convenient. be. In this way, the high temperature operation and low temperature operation of the hot water storage can can be automatically changed according to the intended use, eliminating unnecessary combustion of the burner.
It has a large energy saving effect.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram showing an embodiment of the present invention, Fig. 2 is a flow chart showing an example of temperature control, and Fig. 3 is a flowchart showing an example of temperature control.
The figure is an electric circuit diagram of the remote control section and the control section, and FIG. 4 is a flowchart showing a specific example of temperature control during timer operation. 1: Hot water storage can body, 3: Electric mixing valve,
6: Heat radiator, 8: Remote control section, 9: Operation switch, 9a: Operation confirmation lamp, 14: Temperature control setting display lamp, 15: Low temperature operation switch, 15a: Low temperature operation lamp, 16: Heating operation switch, 16a:
Heating operation confirmation lamp, 17: Microcomputer, 20: Control unit, 30: Timer operation operation unit, 31: Good night start switch, 31a: Good night start lamp, 32: Good morning start switch, 32
a: Good morning start lamp, 33: Timer setting section.

Claims (1)

[Claims] 1. In addition to the hot water supply function that controls high-temperature water from the hot water storage can to a temperature set by an electric mixing valve and releases hot water, the hot water that has been heat-exchanged in the hot water storage can can be heated by setting a timer. It has a heating operation function that can stop the circulation to the radiator after a predetermined time, or start it from a predetermined time, or a combination thereof, and the hot water in the hot water storage can is set for the hot water supply and heating. A temperature control device for a water heater with a heating operation function, which is capable of high-temperature operation that heats and maintains hot water in a hot water storage can at a high temperature, and low-temperature operation that heats and maintains hot water in a hot water storage can at a low temperature to prevent freezing.
The switching between the high temperature operation and the low temperature operation is performed by turning on the low temperature operation switch during the heating operation using the timer;
A heating operation function characterized in that the heating operation switch is configured to perform high temperature operation regardless of whether it is off or not, and otherwise, if the low temperature operation switch is on, the heating operation switch is turned on and low temperature operation is performed regardless of whether it is off. Temperature control device for attached water heater. 2 When the heating operation switch is turned on and the sleep start switch is turned on to stop the heating after a predetermined period of time, high-temperature operation will be performed within the timer setting time regardless of whether the low-temperature operation switch is on or off, and when the set time elapses. 2. The temperature control device for a water heater with a heating operation function according to claim 1, wherein the temperature control device performs low temperature operation if the low temperature operation switch is on, and high temperature operation if the low temperature operation switch is off. 3 With the heating operation switch on, if you turn on the good morning start switch that starts heating at a predetermined time and continues heating for a predetermined period of time from the start, the low temperature operation switch will turn on and off while the timer is heating. The high temperature operation is performed regardless of the presence or absence of the heating, and before the start of heating by the timer and after the end of heating, the low temperature operation is performed if the low temperature operation switch is on, and the high temperature operation is performed if the low temperature operation switch is off. The temperature control device for a water heater with a heating operation function according to item 2. 4. During high-temperature operation, the temperature control setting display lamp of the electric mixing valve lights up to indicate the usable state of the electric mixing valve, and during heating operation, in addition to the temperature control display lamp of the electric mixing valve turning on, the low-temperature operation lamp lights up. Claims 1 to 3 indicate that heating operation is in progress by lighting a heating operation confirmation lamp regardless of whether the heating operation confirmation lamp is lit, and indicate that timer operation is in progress by lighting a timer operation lamp during timer operation. The temperature control device for the water heater with heating operation function described above. 5. The water heater with a heating operation function according to claim 4, which lights up the good night start lamp when the timer is running with the good night start switch on, and lights up the good morning start lamp when the timer is running with the good morning start switch. Temperature control device.