JP2002340408A - Hot water supply control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water supplier excellent in facility even in a region where there is a habit in turning on or off an original power source itself to be supplied to the hot water supplier. SOLUTION: A hot water supply control device comprises a memory 9 capable of storing an operation switch ON/OFF state of a hot water supplier 1 before a power failure, and capable of holding a memory during power failure; a power return control means (a control means 8) for bringing the hot water supply apparatus 1 into the operation switch ON/OFF state stored in the memory 9; and an invalidity setting means 10 for setting a power return control means (a control means 8) to be invalid. When the non-reactivity setting means 10 is sets invalidity, the hot water supplier 1 is set to an OFF state in the operation switch at power return. Further, during power return after abnormality is detected by an abnormality detecting means 4, the hot water supplier 1 is started in an operation switch OFF state. Therefore, safety can also be ensured.

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 control device for controlling a water heater.

[0002]

2. Description of the Related Art Conventionally, in this type of hot water supply control device, the operation ON / OFF of a water heater is switched by a tact-type operation switch.
Normally, the hot water heater is started with the operation switch turned off when the initial data is read from the ROM of the microcomputer, and the operation switch is turned on by the user turning on the operation switch, so that the combustion hot water can be normally supplied.

[0003]

However, in some areas such as Okinawa, the main power supply to the water heater is turned on / off.
There is a habit of turning off the power, and after turning on the hot water, the power is turned off.When the power is turned on again, the operation switch is turned off again. Operation switch after turning on
It was inconvenient and time-consuming to perform N.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a memory for storing an ON / OFF state of an operation switch of a water heater before a power failure and capable of storing and holding the same during a power failure. Power recovery control means for turning on or off the operation switch stored in the memory at the time of power recovery, and invalid setting means for invalidating the power recovery control means, wherein the invalid setting means comprises: If the setting is disabled, the water heater is turned off when the power is restored.

[0005] With this configuration, when the invalid setting means is not set, the water heater is started with the operation switch ON when the water heater before the power failure is in the ON state when the water heater before the power failure is restored when the power is restored after the power failure, and If the water heater is in the operation switch OFF state, the water heater is started in the operation switch OFF state, and if the invalidity setting means is set to invalid, when the power is restored after the power failure, the operation switch of the water heater before the power failure is turned ON / OFF. Regardless, the water heater is started in the operation switch OFF state.

Further, when the water heater is started with the operation switch turned on at the time of turning on the power (at the time of power recovery), a power failure occurs during hot water supply, and then, when running water is detected when power is restored, combustion may start. However, if an earthquake accompanied by a power outage occurs, if there is water flowing after power restoration, combustion may start in spite of a dangerous state, and in order to solve this problem, Flowing water detecting means for detecting the flow of water to be heated, combustion starting means for starting combustion when the flowing water detecting means detects running water with the water heater turned on, and abnormality detecting for detecting abnormality of the water heater. Means,
A memory capable of storing an ON / OFF state of the operation switch of the water heater before the power failure and capable of holding the same even during the power failure, and an operation switch ON / O stored in the memory when the power is restored.
Power recovery control means for switching to the FF state, wherein the power recovery control means turns off the operation switch of the water heater at the time of power recovery after the abnormality detection means detects an abnormality.

[0007] Thus, in a normal state, if the water heater before the power failure is in the ON state, the water heater is started with the operation switch ON when the power is turned on (when the power is restored), and the water heater before the power failure is operated by the operation switch. If it is OFF, the water heater is started with the operation switch OFF when the power is turned on (during power recovery), and if there is any abnormality in the water heater, the operation switch ON / OFF state data before the power failure is irrespective of which one Since the water heater is started with the operation switch turned off when the power is turned on (at the time of power recovery), even if running water is detected at the time of power recovery, combustion is not started, so it is safe.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a water heater main body,
2 is a burner for heating a heat exchanger (not shown) provided in the water heater 1 and 3 is provided on the inlet side or outlet side of the heat exchanger (not shown) to detect the flow of water to be heated. The running water switch 4 has a constant vibration (for example, 170 Gal (cm
/ S ² )), an automatic reset type anti-seismic switch (abnormality detecting means) that operates when there is a power failure detecting circuit 5 provided in the power supply line.

Reference numeral 6 denotes a hot water supply control device, which is a control means (power recovery control means and combustion control) comprising a RAM 7 for storing control data and the like and a ROM (not shown) storing a control sequence for the water heater 1. Start means) 8
And a nonvolatile semiconductor memory (EEPRO) capable of storing and retaining various settings even during a power failure and capable of electrically writing and erasing.
M) 9, an invalid setting means 10 composed of a DIP switch on the board, and a communication circuit 11.

Reference numeral 12 denotes a remote controller for the water heater 1, a RAM 13 for storing display data and the like, and a microcomputer 14 having a ROM (not shown) for storing a control sequence.
And a display unit 15 for displaying an operation state, a tact-type operation switch 16 for switching an operation switch ON / OFF state of the water heater 1, and a communication circuit 11 of the water heater control device 6.
And a communication circuit 18 connected by a two-core cable 17 for exchanging control data.

The operation switch ON / OFF state of the remote controller 12 (that is, the operation ON / OFF state of the water heater 1) and abnormality data such as the operation of the anti-seismic switch 4 are written into the EEPROM 9 of the hot water supply control device 6. Here, at the timing when the power failure detection circuit 5 detects the power failure, the operation switch ON / OFF state stored in the RAM 7 and the abnormality content data such as the operation of the anti-seismic switch 4 are stored in the EEPROM 9 at that time. To write to. When no abnormality has occurred, the data without abnormality is written.

Here, the control means 8 controls the EEPR
The contents stored in the OM 9 are read into the RAM 7 when the power of the water heater 1 is turned on (when power is restored after a power failure), and the water heater 1 is started. If the operation switch ON state of the water heater 1 is stored, When the power is turned on (when the power is restored), the water heater 1 is started with the operation switch ON, and if the operation switch OFF state is stored, the water heater is turned on when the power is turned on (when the power is restored). It is something that starts.

Then, the invalid setting means 10 is provided with the E
Operation switch ON of water heater 1 stored in EPROM 9
The control means 8 reads the setting state of the invalidity setting means 10. If the invalidation setting is not made, the control means 8 stores the operation switch ON state in the EEPROM 9. When the power is turned on (when the power is restored), the water heater 1 is started up with the operation switch turned on.
Even when the operation switch ON state is stored in 9, the water heater 1 is started with the operation switch OFF state when the power is turned on (when power is restored).

Further, the control means 8 controls the EEPRO
When the error content data is written in M9, the power is turned on (during power recovery) even if the invalidity setting means 10 is not set to invalid and the operation switch ON state data is written in the EEPROM 9. Starts the water heater 1 with the operation switch OFF.

When the water heater 1 is in the operation switch ON state, the hot water tap (not shown) is opened and the water switch 3 is turned on.
When the control unit (combustion start unit) 8 detects flowing water, the control unit (combustion start unit) 8 causes the burner 2 to perform combustion to supply hot water.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. 2. First, when power is supplied to the hot water supply control device 6 by turning on the power (step 1, hereinafter abbreviated as S1). The data in the EEPROM 9 is checked (S2), the setting of the invalid setting means 10 is read (S3), and if the setting is not set invalid (referred to as valid setting), it is determined whether the abnormality content data is stored in the EEPROM 9. (S4).

In this case, since the power is turned on for the first time, the abnormality content data is not stored, but the abnormality-free data is stored (or the initial value of the abnormality-free data is read from the ROM). Then, the operation switch ON / OFF state data is read out, and the operation switch OFF state data is initialized (or the operation switch OFF state data, which is an initial value, is read from the ROM) (OFF in S5).
The FF state data is stored, and the water heater 1 is started in the operation switch OFF state (S6).

When the operation switch 16 is turned on, the operation switch ON state data is stored in the RAM 7 and a normal operation process is performed (S7), during which an abnormality due to the operation of the anti-seismic switch 4 or the like must occur. If (S8),
A process for clearing the abnormal contents of the RAM 7 is performed (S
9) In this case, since no abnormality has occurred, the abnormality-free data in the RAM 7 is further overwritten with the abnormality-free data.

When the power failure detection circuit 5 detects the power failure due to the power failure or the power supply itself being turned off (S10),
The operation switch ON state data and the abnormality-free data stored in the RAM 7 are stored in the EEPROM 9 (S1).
1), a series of processing is stopped (S12).

When the power is turned on (recovery) again (S
1) As before, through steps S2 to S5,
This time, since the operation switch ON state data is read from the EEPROM 9, the water heater 1 is started in the operation switch ON state (S13). By this, when power is turned on (when power is restored)
Automatically returns to the previous operation switch ON / OFF state, so that it is easy to use even in an area where the main power supply is directly turned on and off.

If an abnormality occurs in the water heater 1 due to the operation of the anti-seismic switch 4 during operation (S8), the details of the abnormality are stored in the RAM 7 (S14), and the processing corresponding to the abnormality is performed. In the case of this anti-seismic error, the combustion is stopped, an error is displayed on the display unit 15 of the remote controller 12, and the combustion is prohibited until the operation switch 16 is operated again.

Before the cause of the abnormality is removed or the safety is confirmed and the operation switch 16 is operated again to release the abnormal state, the power failure or the main power supply itself is turned off, so that the power failure detection circuit 5 causes the power failure detection circuit 5 to operate. Is detected (S1
0), the operation switch ON state data and abnormality content data stored in the RAM 7 are stored in the EEPROM 9 (S
11) Stop a series of processing (S12).

Thereafter, when the power is turned on (recovery) again (S1), the EEPRO is performed through steps S2 to S4.
The abnormality content data is read from M9, and the abnormality content data is stored in the RAM 7 (S15), and a process corresponding to the content of the abnormality is performed, and whether the operation switch ON / OFF state data stored in the EEPROM 9 is either Regardless, the water heater 1 is started with the operation switch OFF (S
6) When something is wrong,
It is very safe without falling into a dangerous situation such as starting with the operation switch ON.

More specifically, for example, an earthquake occurs during hot water supply (the running water switch 3 is ON and the fuel is burning), the anti-seismic switch 4 is activated, and immediately after the combustion stop processing is performed, the power failure detection circuit 5 is activated.
Even after a power outage is detected, the EEP
Even if the ROM 9 stores the operation switch ON state, since the abnormality content data is also stored in the EEPROM 9 at the same time, the water heater 1 is started in the operation switch OFF state. It is safe without starting combustion.

If the power is restored when there is any abnormality, the hot water heater 1 is started with the operation switch OFF, so that the display unit 15 of the remote controller 12 does not display the details of the abnormality, but the operation switch 16 is operated once. By doing so, the contents of the abnormality are displayed. If the contents of the abnormality are so severe that they need to be repaired by a serviceman, the operation switch 16 is operated to prevent the abnormality from being released, and the operation of the reset switch (not shown) on the board of the hot water supply control device 6 causes the abnormality to be corrected. If it can be released, a serious abnormality is not inadvertently released, and further safety can be ensured.

If the invalid setting means 10 has been switched to invalid setting of the operation switch ON / OFF state data (referred to as invalid setting), the presence or absence of the operation switch ON / OFF state data in the EEPROM 9 Since the water heater 1 is started with the operation switch OFF regardless of the presence or absence of the content data, the microcomputer is used for the area where earthquakes occur frequently or for users who are not comfortable starting the water heater 1 with the operation switch ON. The configured control means 8 and hot water supply control device 6 can be provided as they are, and the control means 8 and parts corresponding to regions having different specifications can be shared, thereby reducing costs.

The invalid setting means 10 is not limited to the DIP switch of this embodiment. For example, the invalid setting means 10 can be switched according to the input state (Hi / Low) of the input port of the control means 8 depending on the presence or absence of a jumper wire, or the remote control 12 can be used.
May be switched by directly storing the valid / invalid state in the EEPROM 9 by operating the switch.

The running water switch 3 detects running water in order to issue a request for hot water supply combustion, and is not limited to the running water switch 3 as in this embodiment.
For example, when the minimum operation flow rate is detected by the flow counter, a request for hot water supply combustion may be issued.

In this embodiment, the anti-seismic switch 4 is used as the abnormality detecting means. However, the present invention is not limited to this. For example, the burner 2 or the heat exchanger may be overheated, or the fuel supplied by the burner 2 may be supplied. It is good also as an abnormality detection means which detects an abnormality of a system.

Next, another embodiment of the present invention will be described with reference to FIG. In addition, the description which overlaps with the previous embodiment will be omitted.

In this alternative embodiment, even if the operation switch is in the ON state, if an abnormality has occurred in the water heater, the EEP
The operation switch OFF state data is stored in the ROM 9, and when the power is subsequently turned on (when the power is restored).
In order to read the operation switch OFF state data from the EEPROM 9, when there is any abnormality, the water heater 1 is started in the operation switch OFF state. Therefore, when there is an abnormality, the water heater 1 is started in the operation switch ON state. It is very safe without falling.

The control means 8 stores the functions of the power recovery control means and the combustion start means in the ROM of the present invention in advance as a power recovery control sequence and a combustion start sequence in the ROM. In the power recovery control sequence, the EEPROM 9
It is only necessary to be able to start the water heater 1 in the operation switch OFF state at the time of power recovery, regardless of the operation switch ON / OFF state before the power failure stored in the water heater. Also, by setting the invalidity setting means 10 to invalidation, the EEPROM
Alternatively, the operation switch OFF state may be always stored in 9 and the operation switch OFF state data stored in the EEPROM 9 may be read out when the power is restored to start the water heater 1 in the operation switch OFF state.

[0033]

As described above, according to the first aspect of the present invention, when the water heater before the power failure is in the ON state at the time of power recovery after the power failure, the invalidity setting means causes the water heater to operate with the operation switch ON. It is possible to set whether to start or to start the water heater with the operation switch OFF even if the water heater before the power failure is in the operation switch ON state, and it can respond to differences in customs regarding how to turn on the power locally. In areas where the main power supply is directly turned on and off, when the power is turned on (when the power is restored), the operation switch automatically returns to the previous operation switch ON / OFF state, thereby improving usability. For users who are uncomfortable with starting the water heater when the operation switch is ON, it is possible to start the water heater with the operation switch OFF when power is restored by setting the invalidation setting means to invalid. It is, it is intended that measurably costs can be shared component corresponding to different regions of the specification.

According to the second aspect of the present invention, when there is any abnormality in the water heater, the operation switch O before the power failure occurs.
The water heater is started with the operation switch OFF regardless of the N / OFF state data. For example, even in a situation where an earthquake occurs during hot water supply and a power failure occurs immediately after the combustion stop processing is performed. , Operation switch OFF after power recovery
The water heater is started in this state, and even if running water is detected at the time of power recovery, combustion is not started and safety is ensured.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the same embodiment.

FIG. 3 is a flowchart showing the operation of another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 hot water heater 3 running water switch 4 anti-seismic switch (abnormality detection means) 6 hot water supply control device 8 control means (power recovery control means and combustion start means) 9 EEPROM (memory) 10 invalid setting means 16 operation switch

Claims (2)

[Claims] 1. Operation switch ON / O of water heater before power failure
A memory capable of storing the FF state and capable of holding the same even during a power failure, a power recovery control means for turning on / off the operation switch stored in the memory when the power is restored, and disabling the power recovery control means. A hot water supply control device, comprising: invalid setting means for setting, and when the invalid setting means is invalidated, the water heater is turned off when the power is restored. 2. A running water detecting means for detecting a flow of water to be heated, a combustion starting means for starting combustion when the running water detecting means detects running water while the hot water supply device is in an operation switch ON state, and an abnormality of the hot water supply device. Abnormality detecting means, a memory capable of storing an ON / OFF state of the operation switch of the water heater before the power failure and capable of retaining the operation switch even during the power failure, and turning on the operation switch stored in the memory when the power is restored. / OFF
Power recovery control means for setting the hot water heater to an operation switch OFF state at the time of power recovery after the abnormality detection means has detected an abnormality in the power recovery control means. Control device.