JPH08166164A - Water heater with followup boiling function - Google Patents

Abstract

PURPOSE: To prevent misoperation as caused by touching a followup boiling switch and an automatic hot water supply switch inadvertently during the period of cleaning or the like while the operation switch is left ON. CONSTITUTION: After the depressing of an operation switch (S2), a hot water cock is opened (S7) to use hot water (S9, S10 and S11). Even when the operation switch is left ON, the operation switch is turned OFF automatically (S22) when a specified time elapses as such (S21, YES).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a water heater with a reheating function, which has an operating section equipped with an operation switch.

[0002]

2. Description of the Related Art Conventionally, a water heater with a reheating function is operated by operating a remote controller equipped with an operation switch, an automatic hot water supply switch, etc. It is designed to accept switch operations. In other words, when the driving switch is turned on,
For the first time, switch operation such as automatic hot water supply or reheating can be performed, and the hot water supply operation of igniting and discharging hot water to the burner based on the switch operation and the turning on of the water flow switch (for example, at a predetermined hot water temperature for a predetermined time or up to a predetermined water level) Automatic driving). At the same time, the display of the remote control is also turned on.

[0003]

However, the operation switch is turned on and off manually, and all the control mechanisms remain in the operation standby state unless the operation switch is turned off. Therefore, forgetting that the operation switch is still on, touching the reheating switch accidentally during cleaning etc., even if the water is boiling There is a risk that it will fill up with unnecessary hot water. Alternatively, if there is no hot water in the bathtub and the reheating switch is pressed by mistake, an error message is displayed, but this is not expected, so it may be mistaken for a malfunction of the water heater. In addition, recently, a remote controller configured to use a fluorescent tube for display also consumes a large amount of power, and if the operation switch is forgotten to be turned off, the power is wasted. A water heater with a reheating function of the present invention has an object to solve the above problems, prevent erroneous operations, and prevent waste of electric power.

[0004]

A first water heater with an additional heating function of the present invention for solving the above problems is a water flow detecting means for detecting a water flow passing through a heat exchanger, and a water flow detecting means of the water flow detecting means. A combustor that heats water passing through the heat exchanger by water flow detection, an operation switch that issues an operation command such as automatic hot water supply or reheating, a controller that controls combustion of the combustor by operating the operation switch, and an operation. The remote controller is provided with a display section for displaying information and an operation switch for switching the controller to the combustion operation state of the controller when turned on and displaying the information on the display section. In the hot water heater with the additional heating function, the gist is that an automatic off means is provided for automatically turning off the operation switch of the operation section when the combustion operation is not performed for a predetermined time.

Further, according to the second water heater with the additional heating function of the present invention, in the first water heater with the additional heating function, the operation switch that is automatically turned off is returned to the on state by the water flow detection means detecting the water flow. The gist is that an automatic on / off means is provided.

Further, according to the third water heater with the additional heating function of the present invention, in the second water heater with the additional heating function, when the operation switch is turned off, water flow detection by the water flow detecting means is confirmed. However, the point is that it does not return to the ON state.

[0007]

According to the first water heater with additional heating function of the present invention having the above-mentioned structure, after the operation switch provided on the remote controller is turned on, the operation information is displayed on the display section and the controller is operated by operating the operation switch. Work to control combustion in the combustor. In other words, it instructs automatic hot water supply and reheating. In such a case, if the combustion operation is not performed for a predetermined time, the operation switch of the remote controller is automatically turned off by the automatic off means. The operation switch has priority over the automatic hot water supply and reheating switch, and if the operation switch is not turned on, not only does the display on the display not appear, but input operation of these operation switches is not accepted, It cannot burn. Therefore, even if you forget to turn off the operation switch, the operation switch is automatically turned off after a predetermined time, so
Except for the operation switch, none of the operation switches is ready to accept input operations. In such a case, it is safe because it does not operate even if the operation switch is pressed by mistake. Further, since the display unit is also turned off, no unnecessary power is consumed. By pressing the operation switch again, the input operation and the combustion operation can be performed.

Further, in the second water heater with the additional heating function of the present invention, like the first water heater with the additional heating function, if the combustion operation is not performed for a predetermined time, the operation switch is automatically turned off and displayed. The display of the operating information of the section is turned off and the input operation of the operation switch is not accepted. Therefore, even if the operator forgets to turn off the operation switch, it does not operate even if the operation switch is pressed by mistake after a predetermined time has elapsed, and it is safe, and the display section is turned off, so that no unnecessary power is consumed. Furthermore, even if the display disappears due to the automatic off means and the input of switches is not accepted, the automatic flow control means is equipped with automatic on / off means that automatically turns the operation switch back on by detecting the water flow by the water flow detection means. It can operate. Therefore, hot water can be supplied without any problem by, for example, opening the hot water tap, so that it is not necessary to go to the remote controller and press the operation switch again. That is, when the water flow is detected again, the operation switch is restored, the display is turned on, and the input operation is possible. Needless to say, after that, if the combustion operation is not continued for a predetermined time, the operation switch is turned off again.

Further, in the third water heater with the additional heating function of the present invention, like the second water heater with the additional heating function, if the combustion operation is not performed for a predetermined time, the operation switch is automatically turned off and displayed. The display of the operating information of the section is turned off and the input operation of the operation switch is not accepted. Then, only when the water flow is detected by the water flow detecting means, the operation switch is automatically turned back on. When the operation switch is turned off, even if it is confirmed that the water flow is detected by the water flow detection means, it does not return to the on state until it is turned on again.

[0010]

EXAMPLES In order to further clarify the constitution and operation of the present invention described above, preferred examples of the water heater with a reheating function of the present invention will be described below. FIG. 3 is a schematic configuration diagram of a water heater with a reheating function as one embodiment. The water heater 1 with a reheating function (hereinafter, simply referred to as the water heater 1) has an external pipe 2
A circulation heating circuit unit 4 connected to the bathtub 3 to circulate and heat the bathwater, a hot water supply circuit unit 5 to supply hot water to the bathtub 3, and a controller 7 to control the operation of both circuits. The circulation heating circuit unit 4 includes a combustion chamber 35 to which combustion air is supplied by a fan 30, a burner 33 that combusts gas in the combustion chamber 35, and a heat exchanger 14 that circulates and heats bath water by gas combustion. Gas conduit 17 which is a gas supply path to the burner 33
An electromagnetic valve 32 that opens and closes the gas flow path, a gas governor 34 that keeps the gas pressure constant, and an ignition device (not shown). In the circulation path 15 in the kettle where the bath water is convectively circulated,
A pressure sensor 29 that detects the water level in the bathtub 3 is provided.

The hot-water supply circuit section 5 heats the combustion chamber 19 to which combustion air is supplied by the fan 9, the burner 13 for burning gas in the combustion chamber 19, and the water supplied from the water inlet by gas combustion. From the heat exchanger 6, the gas conduit 17 that is a gas supply path to the burner 13, the electromagnetic valve 10 that opens and closes the gas flow path, the proportional control valve 12 that controls the gas amount, the ignition device (not shown), and the like. Become. A water flow switch 8 for detecting the flow of water is provided at the water inlet, and a thermistor 1 for detecting the hot water temperature after heating is provided in the outlet pipe 18 downstream of the heat exchanger 6.
6 and water solenoid valve 3 for opening and closing hot water to the circulation heating circuit section 4
1 is provided. Further, hot water is supplied from the water heater 1 not only to the bathtub 3 but also to the kitchen, washroom and the like. A hot water tap 11 for opening and closing hot water is provided at the tip of the pipe for hot water to be tapped from an outlet pipe 18.

The controller 7 performs circulation heating control, automatic hot water supply control, general hot water supply control, and the like, and includes a CPU, RAM, and a well-known arithmetic and logic operation circuit (not shown).
It is composed of a ROM, an input interface for inputting signals from various sensors, an output interface for outputting drive signals to various actuators, and the like. In FIG. 3, the water flow switch 8, the fans 30, 9 and the pressure sensor 2 are shown.
9, the input / output relationship of only the thermistor 16, the solenoid valve 10, the water solenoid valve 31, and the gas solenoid valve 32 is shown and the others are omitted. The controller 7 includes a remote controller 2 for remote operation.
0 is connected.

On the operation display surface of the remote controller 20, as shown in FIG. 4, a display section 21 for displaying operation information, an operation switch 22 for starting and stopping operation, and an automatic instruction for supplying hot water to the bathtub 3 are provided. A hot water supply switch 23, a reheating switch 24 for instructing additional heating of bath water, a hot water switch 25 for adding hot water for a predetermined time, and operation switches such as a hot water temperature button 26 for raising and lowering the hot water temperature are provided. Display unit 21
A liquid crystal or a fluorescent tube displays operating information such as hot water supply temperature and hot water supply time, abnormality information, and the like in a light emission state, and is turned on only when the operation switch 22 is turned on. The operation switches, after turning on the operation switch 22, can be turned on by pressing the finger and can be turned on at the same time, and at the same time, the operation switch 22, the automatic hot water supply switch 23, etc. are turned on at the time of operation. Has become.

Hot water is supplied to the bathtub 3 as follows. First, when the operation switch is turned on and the automatic hot water supply button 23 or the hot water switch 25 of the remote controller 20 is pressed, the water solenoid valve 31 opens, the water flow switch 8 turns on, and the fan 9 rotates. The gas solenoid valve 10 opens and the proportional control valve 1
Fuel gas is supplied to the burner 13 via 2 to ignite, and combustion is controlled by the controller 7. In addition to this, in general hot water supply, the water flow switch 8 is turned on by opening a hot water supply tap 11 provided in a kitchen, a washroom or the like, and hot water supply is started by similar combustion control. When there is a difference between the hot water temperature detected by the thermistor 16 and the set temperature, the controller 7 continuously changes the amount of gas to keep the hot water temperature constant. The rotation speed of the fan 9 also changes according to the change in the gas amount, and the relationship between the gas amount and the air amount is always kept constant.
Thus, in the case of automatic hot water supply, when the hot water is supplied to the predetermined water level in the bathtub 3, the controller 7 operates by the signal of the pressure sensor 29 to stop the hot water supply. On the other hand, in the case of hot water, hot water supply is stopped in the same manner as the set hot water time has elapsed. In addition, the reheating switch 24 of the remote controller 20
When is pressed, the pressure sensor 29 confirms that there is water in the bathtub 3, the fan 30 rotates, the gas solenoid valve 32 opens, and the fuel gas is supplied to the burner 33 via the gas governor 34. Then, similarly to the hot water supply circuit section 5 described above, the combustion control is performed by the controller 7. Thus, when the reheating switch 24 is pressed again after the set time has passed, the gas solenoid valve 32 is closed to extinguish the fire.

In such a state (that is, the operation switch 22 is turned on), the controller 7 automatically turns off the operation switch 22 after a lapse of a certain time without using the water heater 1 (automatic hot water supply, reheating or general hot water supply). To do. At the same time, the operation display surface of the remote controller 20 is turned off and the display section 21 is also turned off.

The above will be described in detail with reference to a flow chart. When operating the water heater 1, as shown in FIG. 1, the power is turned on (S1), and then the operation switch 22 is turned on (S2). At the same time, the timer for automatically turning off the operation switch 22 is started (S3). In this state, other switches (automatic hot water supply switch 23, reheating switch 2
4, the hot water switch 25 and the like) are set in the operation standby state, and the controller 7 is also set in the combustion controllable state. First, when the hot water tap 11 is opened, the water flow switch 8 is turned on (S7, Y
ES) The timer is cleared (S8),
Combustion is performed and hot water supply operation is performed (S9). When the hot water tap 11 is closed (S10, YES), the water flow switch 8 is turned off and combustion is stopped (S11). At the same time, the timer is activated again. When the switches of the remote controller 20 are turned on in the next steps 4, 5, and 6 without operating the hot water tap 11 (S7, NO), the operation corresponding to each switch is performed (details will be described later with reference to FIG. 2). ). In step 12,
The timer starts, but before the time is up,
When the operation switch 22 is turned off (S20, YES), the process returns to step 2. On the other hand, do not turn off the driving switch 22 (S2
If a predetermined time (for example, 1 hour) elapses (0, NO) (S21, YES), the operation switch 22 is automatically turned off (S22).

In step 3, the automatic hot water supply switch 23 is turned on (S4, YES) or the reheating switch 24 is turned on (S5, YES) or the hot water switch 25 is turned on (S6) without opening the hot water tap 11. , YES), the same is true. That is, as shown in FIG. 2, when the automatic hot water supply switch 23 is turned on, the automatic hot water supply is started (S44), and while checking the automatic hot water supply water level, the hot water is supplied to the bathtub 3 and the predetermined water level is reached (S45, YES). Hot water supply is completed (S46), and the automatic hot water supply switch 23 is automatically turned off (S49). At the same time, since the water flow disappears, the water flow switch 8 is also turned off and the timer is also activated (S13).
Then, the process proceeds to steps 20 and 21. When the automatic hot water supply switch 23 is pressed during the automatic hot water supply (S47, YE
Also in S), the hot water supply is stopped (S48), the timer is started (S13), and the process proceeds to steps 20 and 21. Similarly,
Even when the additional heating switch 24 is turned on, when the additional heating is started after the start of additional heating (S54) (S5).
5, YES) After the additional heating is completed (S56), the additional heating switch 24 is automatically turned off (S59), and then the timer is activated (S13), and the process proceeds to steps 20 and 21. In the case of the hot water switch 25, the hot water switch 25 is the same as the case of the automatic hot water supply after the hot water time is completed (S65, YES).
Is turned off (S69), and the process proceeds to steps 20 and 21.

In step 21, when the predetermined time has not passed (S21, NO), the process returns to step 7, the hot water tap 8 is opened (S7, YES) and each switch is turned on (S4, S4).
(5, 6, YES) and such processing is repeated, and at the same time, the timer is also cleared (S8) and activated (S12). In other words, in such a case, there is no possibility of exiting from step 21 to step 22, so the operation switch 25
Does not turn off automatically.

Normally, when the operation switch 22 is turned off, the operation information is displayed and other switches (automatic hot water supply switch 23, reheating switch 24, hot water switch 25, etc.) are displayed unless the operation switch 22 is turned on again. )
Even if you press or open the hot water tap 11, it will not burn,
When the operation switch 22 is automatically turned off, the hot water tap 1
Only when 1 is opened, the process of automatically turning off the operation switch 22 can be canceled and the on state can be restored. That is, the hot water is burned only when the water flow switch 8 is turned on. When the operation switch 22 is automatically turned off, the display on the remote control 20 is turned off (the display unit 21 is turned off,
The switches are not lit and are off.) No remote control operations other than the operation switch 22 are accepted. However, the input from the water flow switch 8 is accepted. That is, in the state where the display of the remote controller 20 is turned off, even if the automatic hot water supply switch 23, the reheating switch 24, and the hot water switch 25 are pressed, no input can be made. Even in such a state, the combustion control is still in full operation, so when the hot water tap 11 is opened (S2
3, YES) The operation switch 22 is automatically turned back on (S24), the display of the remote controller 20 is also returned (lighted), and at the same time, the timer is cleared (S8), and then the process proceeds to step 9 to perform hot water supply operation (S9) and hot water supply. When completed (S10,1
1) Go to steps 20 and 21. When the hot water tap 11 is not operated (S23, NO), the process proceeds to step 20.

In the water heater 1 having such a configuration, if hot water is not supplied or reheated for a predetermined time, the operation switch 22 of the remote controller 20 is automatically turned off and the display section 21 is also turned off. Even if the remote control 20 is automatically turned off after a lapse of a predetermined time, only when the operation switch 22 is pressed and the hot water tap 11 is opened, the normal operation is resumed, and the display unit 21 is turned on. Other switches are ready for use. Therefore, for example, the hot water supply tap 11 provided in the kitchen or the washroom can be supplied with hot water without any problem by the opening operation, so that the user does not have to go to the remote controller 20 and press the operation switch 22 again. On the other hand, the switches and the like, including the operation switch 22, are provided on the remote controller 20, but since the operations other than the hot water tap 11 are originally operated by the remote controller 20, there is no problem in the operation of the water heater 1. From the above, the water heater 1 of the present embodiment is safe because it does not operate even when the operation switch 22 is forgotten and another switch is accidentally pressed. Further, since the display unit 21 is also turned off, wasteful power is not consumed. Moreover, since the normal use (use of the hot water tap 11) can be operated without any problems, it is safe and convenient. Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it goes without saying that the present invention can be implemented in various modes without departing from the scope of the present invention.

[0021]

As described above in detail, in the first hot water heater with the additional heating function of the present invention, even if the operator forgets to turn off the operation switch, the operation switch is automatically turned off after a predetermined period of time, and the display on the display unit is displayed. Is turned off, so it does not consume unnecessary power, and
Even if the operation switch is accidentally pressed or the hot water tap is opened, it is safe because the hot water does not burn. Even if the operation switch is automatically turned off in this way, the operation can be restored by returning to the normal state by pressing the operation switch again, which is convenient.

Further, the second hot water heater with the additional heating function is also safe because it does not operate even if the operation switch is accidentally pressed with the operation switch forgotten turned off. Also,
Since the display is also off, it not only consumes unnecessary power, but it can be seen at a glance that it is not in a normal operating state. Even in such a state, the combustion operation can be performed, so that hot water supply operation such as opening of a hot water tap can be performed without any problem, and there is no need to bother to go to the remote controller and press the operation switch again. In addition, by the water flow detection again, the operation switch is restored, the display is turned on, and the input operation is possible, which is convenient.

Similarly, the third hot water heater with the additional heating function is safe because it does not operate even if the operation switch is accidentally pressed with the operation switch left forgotten. Further, since the display unit is also turned off, no unnecessary power is consumed. Even in such a state, if the operation switch is automatically turned on and the operation switch is turned off only when the water flow detection means detects the water flow, even if the water flow detection means confirms the water flow detection. Since the ON switch does not return until it is turned ON again, the reliability of the operation switch is high.

[Brief description of drawings]

FIG. 1 is a flowchart showing an operating state of an embodiment.

FIG. 2 is a flowchart showing an operating state of one embodiment.

FIG. 3 is a schematic configuration diagram as an example.

FIG. 4 is a diagram showing an operation display surface of a remote controller.

[Explanation of symbols]

 1 Hot water heater with reheating function 3 Bathtub 4 Circulation heating circuit section 5 Hot water supply circuit section 14, 6 Heat exchanger 7 Controller 8 Water flow switch 11 Hot water stopper 33, 13 Burner 20 Remote control 21 Display section 22 Operation switch 23 Automatic hot water switch 24 Addition Boiler switch 25 Tashiyu switch 26 Hot water temperature button

Claims (3)

[Claims] 1. A water flow detecting means for detecting a water flow passing through a heat exchanger, a combustor for heating water passing through the heat exchanger by water flow detection by the water flow detecting means, an automatic hot water supply or additional heating, etc. An operation switch for issuing an operation command, a controller for controlling combustion of the combustor by operating the operation switch, a display unit for displaying operation information, and a display unit for enabling a combustion operation of the controller by an ON operation. In a water heater with a reheating function in which the operation switch and the operation switch are provided on the remote controller, the operation switch of the operation unit is automatically operated if a combustion operation is not performed for a predetermined time. A water heater with a reheating function, characterized in that it is provided with an automatic off means for turning off. 2. The operation switch, which is automatically turned off,
The water heater with a reheating function according to claim 1, further comprising an automatic on / off means for returning to an on state by detecting the water flow by the water flow detection means. 3. The water heater with a reheating function according to claim 2, wherein when the operation switch is turned off, it does not return to the on state even if the water flow detection by the water flow detection means is confirmed.