JPH08226706A - Battery controlled combustor - Google Patents

Abstract

PURPOSE: To obtain a gas re-heating boiler which allows restricting of a price using a dry battery while extending the life of the dry battery and moreover, enables securing of safety even when a valve is disabled from closing. CONSTITUTION: When an electromagnetic valve 32, a pilot valve 33 and a main valve 34 are disabled from closing, a control circuit 13 performs an abnormality display or make attemps to close the valves without turning off a microcomputer. In case of abnormality other than the disabled closure of the valves (errors of ignition, leading a fire, exhaustion and consuming a battery and the like), the electromagnetic valve 32, the pilot valve 33 and the main valve 34 are closed and the microcomputer is turned off. In this way, when the disabled closure of the valves occurs to threaten safety, the continuous operation of the microcomputer enables the securing of the safety. In case of abnormality not threatening the safety, the microcomputer is turned off after closing of the valves to extend the life of a dry battery 62. This enables the using of the dry battery 62 for a power source thereby providing a safe gas re-heating boiler 10 at a lower cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a dry battery as a power source and a fuel supply path for supplying fuel to a burner.
The present invention relates to a battery-controlled combustion device that opens and closes by the operation of an electric actuator.

[0002]

2. Description of the Related Art For example, in a gas reheating device for reheating a bath by burning gas, an opening / closing valve is arranged in a gas supply path, and the opening / closing valve is controlled to open / close by a control circuit.
Then, the conventional gas reheating device uses alternating current 1 supplied to each home as electric power for operating the control valve, the control circuit, and the like.
The power of 00V is transformed and used for rectification.

[0003]

It is desired that each combustion device such as a gas reheating device can be easily installed even in a place where there is no commercial power source, and there is a demand for cost reduction. Therefore, it is conceivable to eliminate the circuit for transforming and rectifying 100 V AC power and using a dry battery as a power source. When a dry battery is used as a power source, a technique of stopping the power supply to the microcomputer used for the control circuit after the end of the operation of the combustion device can be considered in order to extend the life of the dry battery.

Here, the on-off valve includes an electromagnetic valve that opens the fuel supply passage by the magnetic force generated by the electromagnetic coil, a control valve that opens and closes the fuel supply passage by using the rotational force generated by the electric motor, and the like. . Open / close valves such as solenoid valves and control valves may fail during operation of the combustion device and may not be able to close. When the on-off valve cannot be closed in this way, if the power supply to the microcomputer is stopped without closing the valve, even if the fuel supply passage is closed by another on-off valve, the failed on-off valve will be closed. The valve remains open. Further, if the microcomputer is provided so as to constantly energize to monitor the state of the on-off valve, the power consumption of the dry battery is large, the battery life is shortened, and the cost reduction due to the dry battery power supply cannot be expected.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to use a dry battery as a power source, extend the life of the dry battery to be used, and further provide an on-off valve operated by an electric actuator. An object of the present invention is to provide a battery-controlled combustion device that can ensure safety even if an abnormality occurs.

[0006]

The battery-controlled combustion apparatus of the present invention employs the following technical means in order to achieve the above object. [Means for Claim 1] A battery-controlled combustion device is provided with (a) a burner for burning fuel, (b) a fuel supply passage for supplying fuel to the burner, and (c) an electric actuator. An on-off valve that opens and closes the fuel supply path; (d) a control circuit that uses a microcomputer to control the operation of the electric actuator; and (e) supplies operating power to this control circuit,
A dry battery for supplying operating electric power to the electric actuator. Then, the control circuit includes (d-1) a valve-closing-impossible detecting unit that detects that the opening / closing valve cannot be closed.
2) Other abnormality detection means for detecting an abnormality other than inability to close the opening / closing valve, and (d-3) Retry of the closing operation when the closing failure detection means detects inability to close the opening / closing valve. Or (d-4) when the other abnormality detecting means detects an abnormality other than the inability to close the valve, after the closing of the opening / closing valve, Other abnormality response means for stopping energization of the microcomputer.

[Means for Claim 2] In the battery-controlled combustion apparatus according to claim 1, the on-off valve is an electromagnetic valve that opens and closes the fuel supply path by the operation of an electromagnetic coil that is the electric actuator. Combustion of the burner is stopped by closing the solenoid valve.The valve closing failure detection means detects the valve closing failure when the extinction is not confirmed within a predetermined time after the valve closing operation is instructed. Therefore, the means for responding to the inability to close the valve is provided with an abnormality display means for displaying to the user that the solenoid valve is incapable of closing the valve using a display device.

[Means for Claim 3] In the battery-controlled combustion apparatus according to claim 1, the on-off valve is a control valve that opens and closes the fuel supply passage by the operation of an electric motor that is the electric actuator. The inability detection means detects the inability to close the valve from the operating state of the detection switch that detects the operation of the control valve, and the inability to close the valve corresponds to the inability to close the control valve for a predetermined time. After the operation of the electric motor is stopped for a period of time, a retry means for giving an instruction of a valve closing operation to the electric motor again is provided.

[Means of Claim 4] In the battery-controlled combustion apparatus according to Claim 3, the valve closing incapability handling means executes the retry of the electric motor for a predetermined number of times by the retry means. Also, it is characterized in that a retry stop means is provided for stopping the energization of the microcomputer when the control valve cannot be closed.

[Means of Claim 5] In the battery-controlled combustion apparatus according to any one of Claims 1 to 4, the burner heats a reheating heat exchanger for reheating the bath. Is characterized by.

[0011]

[Operation and effect of the invention]

[Operation and Effect of Claim 1] When the other abnormality detecting means detects an abnormality other than the inability to close the valve, the other abnormality responding means closes the opening / closing valve, and then the power supply to the microcomputer is stopped and the power is turned on. Suppress the consumption of certain dry batteries. When the valve closing failure detection means detects that the opening / closing valve cannot be closed, the microcomputer does not stop energizing, and the valve closing failure responding means by the operation of the microcomputer retries the valve closing operation (opening valve closing effort). ), Or display that the valve cannot be closed. In this way, when the opening / closing valve cannot be closed due to the operation of the electric actuator, the microcomputer operates to ensure safety. That is, safety can be ensured even when the on-off valve cannot be closed. In addition, in the case of an abnormality other than the inability to close the valve, the microcomputer stops after closing the on-off valve,
It is possible to reduce the power consumption of dry batteries while ensuring safety. In other words, since the life of the dry battery can be extended while ensuring safety, the cost of the combustion device can be kept low by using a dry battery power source,
The combustion device can be easily installed even in a place without an AC power source, and the workability of the combustion device can be improved.

[Operation and Effect of Claim 2] Even if the control circuit gives an instruction to shut off the solenoid valve, if the burner is not extinguished within a predetermined time, the valve closing failure detection means causes the solenoid valve to close. Detects valve failure. Then, when it is detected that the solenoid valve cannot be closed, the abnormality display means displays a message to the user that "the solenoid valve has been unable to close" using the indicator. In this way, when the solenoid valve is unable to be closed, the microcomputer does not stop operating and an abnormality is displayed to the user. Therefore, the battery-controlled combustion device can ensure safety.

[Operation and Effect of Claim 3] Even if the control circuit gives an instruction to shut off the control valve, if the detection switch does not confirm that the control valve is closed, the unclosing possibility detection means is Detects that the valve cannot be closed. Then, when it is detected that the control valve cannot be closed, the retry means stops the operation of the motor for a predetermined time to suppress the power consumption of the dry battery, and then restarts the electric motor to close the control valve. I do. In this way, when the control valve becomes unable to be closed, the microcomputer makes an effort to close the control valve without stopping the operation, so that the battery-controlled combustion apparatus can ensure safety.

[Operation and Effect of Claim 4] When the control valve does not close even after the operation of the electric motor is stopped for a predetermined period of time and the retry of the electric motor is retried a predetermined number of times by the retry means, further retry is made. Even if it goes, it judges that the control valve does not close, and stops energizing the microcomputer. Therefore, unnecessary retries are not performed, and power consumption of the dry battery due to unnecessary retries can be suppressed.

[Operation and Effect of Claim 5] By adopting claim 5, it is possible to secure high safety of the reheating device that drives the opening / closing valve by the electric actuator.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a battery control type combustion apparatus of the present invention will be described with reference to the drawings based on an embodiment applied to a gas reheating apparatus for a bath. [Configuration of Embodiment] FIGS. 1 to 5 show an embodiment, and FIG. 1 is a schematic configuration diagram of a gas reheating device. The gas reheating device 10 is roughly classified into a combustor 1 that burns gas (fuel) to heat water or hot water in a bath (not shown).
1. Gas supply means 1 for supplying gas to the combustor 11
2, and a control circuit 13 for operating them, which will be described in order below.

(Description of Combustor 11) The combustor 11 comprises a pilot burner 14, a main burner 15, a heat exchanger 16 for additional heating, and an exhaust stack 17. Pilot burner 1
The four and the plurality of main burners 15 are provided in parallel, and both are Bunsen burners that blow out the gas supplied from the gas supply means 12 from a large number of ejection holes and burn the gas by the surrounding air. However, the main burner 15 is provided with a large combustion amount. The pilot burner 14 is a burner that ignites before the main burner 15 and transfers the heat to the main burner 15. In the vicinity of the pilot burner 14, an ignition plug 18 that ignites the pilot burner 14,
A thermocouple 19 for detecting the ignition state of the pilot burner 14 is provided.

The additional heat exchanger 16 heats the water (hot water) in the bathtub by exchanging heat between the gas burned by the pilot burner 14 and the main burner 15 and the water (hot water) in the bathtub. The pipe 21 is connected to the bathtub to guide the water (hot water) in the bathtub, and the fins 22 enhance the heat exchange efficiency. The heat exchanger for reheating 1
An empty heating detection sensor 23 for detecting the empty heating is attached to the pipe 21 of 6. This empty heating detection sensor 23
Is a bimetal switch that detects the temperature of the pipe 21,
When the temperature of the pipe 21 reaches a predetermined temperature or higher, it is turned on or off to detect the empty heating.

The exhaust pipe 17 is a pipe for collecting the exhaust gas that has passed through the heat exchanger 16 for additional heating and discharging it to the outside. The exhaust end 17 has a discharge side end portion for alleviating deterioration of the combustion state due to wind. A baffle 24 is attached. A first exhaust thermistor 25 is attached inside the baffler 24, and a second exhaust thermistor 26 is attached below the baffler 24. The first exhaust thermistor 25, 26 detects the temperature and the wind It is provided to detect the influence of

(Description of Gas Supply Means 12) The gas supply means 12 comprises a gas supply passage 31, an electromagnetic valve 32, a pilot valve 33, a main valve 34, and a governor valve 35. The gas supply path 31 includes a hose end 36 to which a gas hose or gas pipe (not shown) for receiving gas is connected at one end. Then, the gas supplied from the hose end 36 is supplied to the pilot valve 33 and the main valve 34 via the electromagnetic valve 32. The gas supply passage 31 has a small passage diameter for passing the pilot valve 33 to supply gas to the pilot burner 14, and a small passage diameter for passing the main valve 34 to supply gas to the main burner 15. It is provided so as to branch to a large main passage 38. The governor valve 35 keeps the pressure of the gas flowing through the main passage 38 constant.

The electromagnetic valve 32 is a safety valve provided on the upstream side of the gas supply passage 31. The solenoid valve 32 is of a normally closed type and, as shown in FIG. 2, is composed of a valve body 42 that closes the gas supply passage 31 with a spring 41, and an electromagnetic coil 43 that opens the valve body 42. . The electromagnetic coil 43 is energized only when the operation is started to generate a large electromagnetic force, and the magnetic armature 42 provided on the valve body 42 is provided.
The suction coil 43a that attracts a to the iron core 43c to open the valve element 42 and the armature 42 that is constantly energized during operation.
It is composed of a holding coil 43b that keeps a in a magnetized state in the iron core 43c and keeps the valve element 42 in an open state.

The pilot valve 33 and the main valve 34 both correspond to control valves. As shown in FIG. 2, the pilot valve 33 has a valve body 45 that closes the pilot passage 37 with a spring 44, and this valve body 45. And a pilot valve opening mechanism 46 for opening the valve.

The pilot valve opening mechanism 46 comprises a geared motor 47, a cam 48 and a push rod 49. The geared motor 47 rotationally drives the shaft 53 with a rotational force generated by the electric motor 51 by a gear train 52 using a plurality of gears. The gear train 52 suppresses the number of rotations generated by the electric motor 51 to generate torque. It is provided to increase. The shaft 53 including the cam 48 is provided to be rotated by 360 ° by the geared motor 47.

The cam 48 is provided so as to rotate integrally with the shaft 53, and changes the displacement position of the push rod 49 according to the rotational position of the shaft 53. The push rod 49 directly displaces the valve element 45 of the pilot valve 33, and the cam 48 displaces the push rod 49 downward in FIG.
The valve body 45 is provided so as to open the pilot passage 37. When the cam 48 is driven to rotate 360 ° by the geared motor 47, the push rod 49 shifts as shown by the solid line A in FIG. 3 as the cam 48 rotates.

On the other hand, as shown in FIG. 2, the main valve 34 has a valve body 5 that closes the main passage 38 with a spring 54.
5 and the valve element 55 depending on the displacement position of the push rod 49.
And a main valve opening mechanism 56 for opening the valve. The main valve opening mechanism 56 includes a pressing rod 57 attached to the push rod 49 and a pressure receiving cylinder 58 attached to the valve body 55. The pressure receiving cylinder 58 is slidably fitted around a fixed cylinder 59 fixed in the gas supply passage 31, and is provided with an annular rib 58a which is pressed by the pressing rod 57 around the circumference. This annular rib 58a is
The pressing rod 57 is provided so as to come into contact with the pressing rod 57 after being displaced by a predetermined amount downward in FIG.

Therefore, when the pushing amount of the push rod 49 is small (for example, the rotation angle of the cam 48 is about 100 °).
Indicates that the pilot valve 33 → opens and the main valve 34 → closes, but when the pressing amount of the push rod 49 increases (for example, the rotation angle of the cam 48 is about 260 °), the pilot valve 33 → opens, the main valve 34 → Open (Fig. 3
Solid lines B and C). When the rotation angle of the cam 48 becomes a predetermined angle or more (for example, 295 ° or more), the pressing force of the push rod 49 by the cam 48 is released and the springs 44, 5 are released.
By the action of 4, the pilot valve 33 → closes, the main valve 3
4 → Closed.

On the other hand, the geared motor 47 is provided with detection means for detecting the rotational position of the cam 48, that is, the open state of the pilot valve 33 and the main valve 34. This detecting means is a pilot switch Psw formed of a micro switch, a main switch Msw, and a pilot switch Psw according to the rotational position of the shaft 53.
Rotation detection cam 6 that turns on and off the sw and main switch Msw
It consists of zero.

The pilot switch Psw and the main switch Msw correspond to detection switches. The pilot switch Psw and the main switch Msw are cams 48.
ON-OFF (Hi-Low) changes as indicated by solid lines D and E in FIG. 3 in accordance with the rotational position of, that is, the open state of the pilot valve 33 and the main valve 34. Specifically, first, when both the pilot valve 33 and the main valve 34 are closed, only the main switch Msw is changed to Hi. Then, the operation of the electric motor 51 causes the pilot valve 33 to open reliably and the main valve 34 to close, and the pilot switch Psw also changes to Hi. Next, the pilot valve 33 and the main valve 3
Only the main switch Msw is Low when 4 is surely opened.
The operation changes to. Further, the rotation of the cam 48 progresses, and the pilot switch Psw is changed to Low while the pilot valve 33 and the main valve 34 are securely closed.

(Description of Control Circuit 13) The control circuit 13
As shown in the block diagram of FIG. 4, electric functional parts (spark plug 18, electromagnetic coil 4) provided in the gas reheating device 10.
No. 3 suction coil 43a and holding coil 43b, electric motor 51, combustion confirmation lamp 66 and battery confirmation lamp 67), which will be described later, are energized and controlled according to an input signal and a control program. It is powered by 62 power.

The control circuit 13 receives, as an input signal, the remote controller 63 in addition to the above-mentioned thermocouple 19, empty heating detection sensor 23, first exhaust thermistor 25, second exhaust thermistor 26, pilot switch Psw, main switch Msw. Signals are input from the operation switch 64 and the timer volume 65 provided on the remote controller.

The operation switch 64 is a tact switch for instructing start or stop of the gas reheating device 10. The timer volume 65 is a variable resistor for setting the reheating time, and the control circuit 13 determines the number of bits according to the resistance value and changes the count time once according to the number of bits. . The control circuit 13 counts a predetermined number of times (for example, 255 times) regardless of the number of bits, and sets the timer time by changing the count time once.

The remote controller 63 is installed in the bathroom and operated by the user.
In addition to the timer volume 65, a combustion confirmation lamp 66 for confirming the combustion state and a battery confirmation lamp 67 for confirming the voltage of the dry battery 62 are provided.

The dry battery 62 is, for example, a power source using two single dry batteries, and in addition to the operation of the control circuit 13, the operation of the ignition plug 18, the operation of the electromagnetic coil 43, the operation of the electric motor 51, and the combustion confirmation lamp 66. It is also used when operating the battery confirmation lamp 67.

(Description of Operation of Gas Reheating Device 10 by Basic Operation of Control Circuit 13) Here, the basic operation of the control circuit 13 will be described with reference to the flowchart of FIG. When the operation switch 64 is turned on, the power is turned on (start), and then it is determined whether or not the additional heating time is set by the timer volume 65 (step S1). If the determination result is NO, it is determined whether or not a predetermined time (for example, 5 seconds) has elapsed after the operation switch 64 is turned on (step S2). If the result of this determination is NO, the procedure returns to step S1, and if the result of determination is YES (when the timer has not been set for a predetermined time even when the operation switch 64 is turned on)
Turns off the power supply of the microcomputer 61 because the operation switch 64 is turned on due to a malfunction, and ends (step S3).

If the result of the determination in step S1 is YES,
The ignition plug 18 is turned on (step S4). continue,
The electric motor 51 is turned on to open only the pilot valve 33 (step S5). Next, it is determined whether or not the electric motor 51 has moved to open the pilot valve 33, that is, whether or not the pilot switch Psw has changed to Hi (step S6). If this judgment result is NO,
Returning to step S6, the electric motor 51 is turned on until the pilot switch Psw changes to Hi. If the decision result in the step S6 is YES, it is decided that the pilot valve 33 is opened, and the electric motor 51 is turned off (step S6).
7). Next, the electromagnetic coil 43 is turned on (specifically, both the suction coil 43a and the holding coil 43b are initially turned on.
Then, only the suction coil 43a is turned off, step S8).

Next, it is judged whether ignition has been detected in the pilot burner 14, that is, whether the electromotive force of the thermocouple 19 provided near the pilot burner 14 has exceeded a predetermined value (step S9). The result of this judgment
In the case of NO, it is determined whether or not a predetermined time (for example, 25 seconds) has elapsed after turning on the electromagnetic coil 43 (step S
Ten). If the result of this determination is NO, it is determined that the predetermined time has not elapsed, and the process returns to step S9. If the decision result in the step S9 is YES, it is decided that the ignition is confirmed, and the ignition plug 18 is turned off (step S11).

Then, the electric motor 51 is turned on to open the main valve 34 (step S12). Next, it is judged whether the main valve 34 is opened, that is, whether the main switch Msw is changed to Low (step S13). If the result of this determination is NO, the process returns to step S13. If the decision result in the step S13 is YES, it is decided that the main valve 34 is also opened, and the electric motor 51 is turned off.
Yes (step S14). Incidentally, this step S13, S14
The combustion of gas in the main burner 15 is started by the operation of, and the combustion of the pilot burner 14 and the main burner 15 heats the water (hot water) in the bathtub introduced into the pipe 21 of the heat exchanger 16 for additional heating. To do.

Next, after the ignition is detected, the timer volume 6
It is determined whether or not the additional heating time set by 5 has elapsed (step S15). If this judgment result is NO,
It is determined that the additional heating time has not elapsed, and the process returns to step S15. If the result of this determination is YES, it is determined that the additional heating time has elapsed, and the operation proceeds to extinguishing. That is, first, the electromagnetic coil 43 is turned off (specifically, the suction coil 43
a has already been turned off, and the holding coil 43b is turned off, step S16).

Next, it is judged whether or not extinguishing has been detected, that is, whether or not the electromotive force of the thermocouple 19 has dropped below a predetermined value (step S17). If this judgment result is NO,
After turning off the electromagnetic coil 43, a predetermined time (for example, 120
Seconds) is determined (step S18). If the result of this determination is NO, it is determined that extinguishing has not been confirmed, and the process returns to step S17. The judgment result of step S17 is
In case of YES, it is judged that the extinguishing has been confirmed, and the pilot valve 33 and the main valve 34 should be closed.
The electric motor 51 is turned on (step S19).

Next, whether the pilot valve 33 and the main valve 34 are closed, that is, the pilot switch P
It is determined whether sw has changed to Low (step S2
0). If the result of this determination is NO, the process returns to step S20. If the decision result in the step S20 is YES, it is decided that the pilot valve 33 and the main valve 34 are closed, and the electric motor 51 is turned off (step S21). With the above, all the additional heating operations are completed and the state before the operation is started is returned. Therefore, the power of the microcomputer 61 is turned off.
Then, the process ends (step S22).

On the other hand, if the result of the determination in step S10 is YES, that is, if ignition is not detected within 25 seconds after the start of ignition, it is determined that an ignition error has occurred, the ignition operation is terminated, and the gas-fired device is activated. The operation of returning 10 to the state before the start of operation is performed.
That is, first, the electromagnetic coil 43 is turned off (as described above, the suction coil 43a is already turned off, the holding coil 43b is turned off, step S23), and the ignition plug 18 is turned off (step S24). Then, the electric motor 51 is closed to close the pilot valve 33.
It is turned on (step S25). After that, whether the pilot valve 33 is closed, that is, the pilot switch Psw is Lo
It is determined whether or not it has changed to w (step S26). Since the electric motor 51 has a constant rotation direction, the main valve 34 opens and closes before the pilot valve 33 closes. NO in step S26
In the case of, it returns to step S26. If the decision result in the step S26 is YES, it is decided that the pilot valve 33 and the main valve 34 are closed, and the electric motor 51 is turned off.
Yes (step S27). As a result of returning to the state before the start of operation as described above, the power of the microcomputer 61
Then, the process ends (step S28).

If the result of the determination in step S18 is YES, that is, if extinguishing is not detected within 120 seconds after the electromagnetic coil 43 is turned off, it is determined that the electromagnetic coil 43 is defective and cannot be extinguished. , Pilot valve 33
And the main valve 34 is used to extinguish the fire and display an abnormality. That is, first, the electric motor 51 is turned on to close the pilot valve 33 and the main valve 34 (step S29). Next, it is determined whether the pilot valve 33 and the main valve 34 are closed, that is, whether the pilot switch Psw is changed to Low (step S30). If the result of this determination is NO, the process returns to step S30. If the decision result in the step S30 is YES, it is decided that the pilot valve 33 and the main valve 34 are closed, and the electric motor 51 is turned off (step S31). Then, the fact that a malfunction has occurred in the solenoid valve 32 (error display)
Is displayed to the user using a combustion confirmation lamp 66 and a battery confirmation lamp 67 provided on the remote controller 63 (for example, the combustion confirmation lamp 66 and the battery confirmation lamp 67 are used as indicators to display the combustion confirmation lamp 66 and the battery. Confirmation lamp 6
Repeat 7 for 1 second ON and 1 second OFF for "solenoid valve 32
Is not possible to close the valve ", step S32).

When the operation switch 64 is turned on again after the start of operation and before the end of operation, that is, when an instruction to stop the operation is given, if both the pilot switch Psw and the main switch Msw are Low, If the pilot switch Psw and the main switch Msw are not both low, the power is turned off and the process ends.
After the fire extinguishing operation is performed, the process is returned to the state before the operation is started, and the power of the microcomputer 61 is turned off to end the operation.

(The solenoid valve 32, the pilot valve 33, and the main valve 34 cannot be closed (description of means for dealing with errors including a valve closing error)) In the gas reheating apparatus 10 of this embodiment, the solenoid valve 32 is closed. Valve error, pilot valve 33 and main valve 34 closing error, operation switch 64
Operation error, exhaust error, ignition error, misfire error,
Means are provided for detecting an error such as a timer volume error and a battery exhaustion error and corresponding to each.

A valve closing error of the solenoid valve 32 is caused by a predetermined time (for example, 120 seconds) after extinguishing the fire by the solenoid valve 32.
This is an abnormality when the thermocouple 19 does not detect fire extinguishing. It should be noted that a predetermined time (for example, 12
The operation of the control circuit 13 that detects the valve closing failure of the solenoid valve 32 when the thermocouple 19 does not detect the extinction within 0 seconds depends on the operation of the valve closing failure detection means 71 (steps S16 and S17 in the flowchart). , S18 operation). Also,
After detecting that the solenoid valve 32 cannot be closed, after closing the pilot valve 33 and the main valve 34, the combustion confirmation lamp 66 and the battery confirmation lamp 67 are used to instruct the user that "the solenoid valve 32 cannot be closed. The operation of the control circuit 13 for displaying the abnormality of "to the effect" is related to the operation of the valve closing incapable means 72 (steps S29, S30, S31, S of the flowchart).
32 actuation).

The errors of the pilot valve 33 and the main valve 34 are caused when the signal changes of the pilot switch Psw and the main switch Msw do not change in the order of normal times, or when the pilot switch Psw and the main valve have a predetermined time (for example, 20 seconds). This is an abnormality when the signal of the switch Msw does not change, and includes a valve opening error of the pilot valve 33 and the main valve 34 (abnormality of not opening the valve).

Here, the error of the pilot valve 33 and the main valve 34 will be specifically described. Control circuit 1
3, when the operation is started, the electric motor 51 is energized based on the signals from the pilot switch Psw and the main switch Msw, and the pilot valve 33 and the main valve 34 are opened and closed, as described in the above flowchart. are doing.

The transition state of the pilot switch Psw / main switch Msw at the normal time is the operation start (Low / Low) →
(Low / Hi) → Pilot valve 33 open (Hi / Hi) → Main valve 34 open (Hi / Low) → Pilot valve 33
And it changes when the main valve 34 is closed (Low / Low).
In other words, if it is normal, (Low / Low) → (Low / H)
i) → (Hi / Hi) → (Hi / Low) → (Low / Low)

However, the control circuit 13 causes the electric motor 51 to
, The electric motor 51 does not actually operate,
There is a possibility that the operating states of the pilot switch Psw and the main switch Msw will not change (the electric motor 51 is locked due to failure of the electric motor 51, exposure of the electric motor 51, breakage of the lead wire, disconnection of the lead wire connection socket, etc.). Occurrence). Therefore, in the control circuit 13, in order to cope with the case where the electric motor 51 is locked and the valve cannot be closed, the valve closing impossible detection means 71 and the valve closing impossible correspondence means 72.
Is provided.

The valve closing failure detection means 71 for the pilot valve 33 and the main valve 34 includes a pilot switch Psw and a pilot switch Psw within a predetermined lock detection time (for example, 20 seconds) when the control circuit 13 operates the electric motor 51. When the operating state of the main switch Msw does not change, "the valve cannot be closed" is detected.

The valve closing failure handling means 72 for the pilot valve 33 and the main valve 34 is a means for avoiding the valve closing failure and comprises a retry means (not shown) and a valve closing means (not shown). . The retry means stops the operation of the electric motor 51 for a predetermined time period when the valve closing failure detection means 71 detects “valve closing impossible”, and after stopping for a predetermined time period (for example, 10 minutes), the electric motor 51 is turned on. It works again.

The retry means is used for the electric motor 5
If the operating states of the pilot switch Psw and the main switch Msw did not change within the lock detection time (20 seconds) when 1 was re-moved, retry was performed up to three times (the electric motor 51 was stopped for a predetermined time). After that, the electric motor 51
However, if the operating states of the pilot switch Psw and the main switch Msw do not change within the lock detection time even during the fourth retry, the "valve cannot be closed" is released. When it is determined that the microcomputer 61 cannot be operated, the power of the microcomputer 61 is turned off to stop the operation.

In the valve closing means, the valve closing inability detection means 71 detects "inability to close the valve", and the retry means causes the electric motor 5 to be closed.
When the operation state of the pilot switch Psw and the main switch Msw changes within the lock detection time (20 seconds) when 1 is moved again, it is determined that the "valve closure impossible" is released, and the pilot switch Psw is used. Both the pilot valve 33 and the main valve 34 are set to the closed state based on the signal change (Hi → Low) when the valve is closed. After that, the power supply of the microcomputer 61 is turned off to stop the operation.

The operation error of the operation switch 64 is an abnormality when the operation switch 64 continuously generates an ON signal for a predetermined time (for example, 10 seconds) or more. The operation of the control circuit 13 that determines an abnormality when the operation switch 64 continuously detects the ON signal for a predetermined time period depends on the operation of the other abnormality detection means 73. Further, when an operation error is detected, the operation is stopped, the gas reheating device 10 is returned to the initial state, and the power of the microcomputer 61 is turned off.
The operation of the control circuit 13 to operate depends on the operation of the other abnormality handling means 74.

The exhaust error is the first due to the influence of wind and the like.
This is an error when an abnormality occurs in the exhaust state by the exhaust thermistor 25 and the second exhaust thermistor 26 (for example, backflow of exhaust gas or exhaust blockage). The operation of the control circuit 13 that detects an exhaust error from the temperatures of the first exhaust thermistor 25 and the second exhaust thermistor 26 depends on the operation of the other abnormality detecting means 73. Further, when an exhaust error is detected due to a strong wind or the like, the operation of the control circuit 13 for stopping the operation, displaying the error once, and then turning off the power of the microcomputer 61 is performed by the other abnormality handling means 74.
Operation.

The ignition error is an abnormal condition when the thermocouple 19 does not detect ignition within a predetermined time (for example, 20 seconds) while the solenoid plug 32 and the pilot valve 33 are opened while the spark plug 18 is activated. is there. In addition, in the control circuit 13 that detects an ignition error when the thermocouple 19 does not detect ignition within a predetermined time (for example, 20 seconds) in a state where the ignition plug 18 is ON and the solenoid valve 32 and the pilot valve 33 are open. The operation depends on the operation of the other abnormality detecting means 73 (operations of steps S9 and S10 of the flowchart). Further, when the ignition error is detected, the operation of the control circuit 13 that stops the operation, restores the gas reheating device 10 to the initial state, and turns off the power of the microcomputer 61 affects the operation of the other abnormality handling means 74. (Operation of steps S23 to S28 of the flowchart).

The misfire error is caused by the thermocouple 1 during combustion.
9 is an abnormality when detecting fire extinguishing. The operation of the control circuit 13 that detects a misfire error when the electromotive force of the thermocouple 19 decreases during combustion is the other abnormality detecting means 7
It takes 3 operation. When the misfire error is detected, the operation of the control circuit 13 for stopping the operation, returning the gas reheating device 10 to the initial state, and turning off the power of the microcomputer 61 affects the operation of the other abnormality handling means 74. .

The timer volume error is an abnormality when the resistance value of the timer volume 65 is larger than a predetermined value (disconnection abnormality) and when the resistance value of the timer volume 65 is smaller than the predetermined value (short circuit abnormality). When the resistance value of the timer volume 65 is larger than a predetermined value (abnormal disconnection), the timer volume 6
When the resistance value of 5 is smaller than the specified value (short circuit error)
Control circuit 1 for detecting timer volume misfire error
The operation of No. 3 is related to the operation of the other abnormality detecting means 73. Further, when the timer volume error is detected, the operation of the control circuit 13 for stopping the operation, returning the gas reheating apparatus 10 to the initial state and turning off the power of the microcomputer 61 becomes the operation of the other abnormality handling means 74. It takes.

The battery exhaustion error is an error when the voltage of the dry battery 62 falls below a predetermined voltage value (for example, 1.7 V). The operation of the control circuit 13 that detects a battery exhaustion error when the voltage of the dry battery 62 is lower than a predetermined voltage value (for example, 1.7 V) depends on the operation of the other abnormality detecting unit 73. Further, when the battery exhaustion error is detected, the operation of the control circuit 13 for stopping the operation, returning the gas reheating device 10 to the initial state, and turning off the power of the microcomputer 61 is changed to the operation of the other abnormality response means 74. It takes.

[Effects of Embodiment] In the gas reheating device 10 of this embodiment, as described above, the other abnormality detecting means 73 causes an abnormality other than the solenoid valve 32, the pilot valve 33, and the main valve 34 not being able to close. When an operation error of the operation switch 64, an exhaust error, an ignition error, a misfire error, a timer volume error, or a battery exhaustion error is detected, the other abnormality handling means 74 stops the operation and the gas reheating device 10 is in the initial state. Then, the microcomputer 61 is turned off to suppress the consumption of the dry battery 62. In the case of an abnormality other than the valve closing, even if all the operations are stopped, the safety is not affected, and even if the operation is restarted, if the abnormal state is not avoided, the operation is stopped again.

Further, the valve closing failure detection means 71 is the solenoid valve 3
2. When it is detected that the pilot valve 33 and the main valve 34 cannot be closed (error of closing the solenoid valve 32, error of the pilot valve 33 and the main valve 34), the microcomputer 61 is not turned off, and the microcomputer 61 does not turn off. The valve closing incapability responding means 72 due to the operation displays an abnormality of the solenoid valve 32 or avoids the valve closing failure of the pilot valve 33 and the main valve 34 (valve closing effort).

When the solenoid valve 32, the pilot valve 33, and the main valve 34 cannot be closed, the microcomputer operates to ensure the safety, and an error display and a retry of the valve closing operation are performed. Therefore, even if the valve cannot be closed, the gas reheating device 10 can ensure the safety.

In addition, when the abnormality is other than that the valve cannot be closed, the solenoid valve 3
2. Since the microcomputer 61 is turned off after closing the pilot valve 33 and the main valve 34, the gas reheating device 10 can suppress the power consumption of the dry battery 62 while ensuring the safety. In other words, since the life of the dry battery 62 can be extended while ensuring safety, the cost of the gas reheating device 10 can be reduced by using a dry battery as the power source.

If the retry means does not stop the valve closing even after the operation stop and re-try of the electric motor 51 are executed a predetermined number of times (4 times) by the retry means,
It is determined that the inability to close the valve cannot be avoided even if the retry is further performed, and the energization of the microcomputer 61 is stopped. For this reason, useless retries can be avoided, power consumption of the dry battery 62 due to useless retries can be suppressed, and the life of the dry battery 62 can be extended.

[Modification] In the above embodiment, an example in which the present invention is applied to a gas reheating device is shown, but it may be applied to another gas combustion device such as a gas water heater or a gas heater. The present invention can be applied to all other battery-controlled combustion devices including a control valve operated by an electric motor, such as a battery-controlled combustion device that burns with a liquid fuel such as kerosene.
A battery-controlled combustion device equipped with two control valves operated by an electric motor is shown as an example, but a battery-controlled combustion device having one control valve operated by an electric motor or three or more battery-controlled combustion devices Even a combustion device can be applied.

In the above embodiment, the lamp is used as the abnormality display means, but other visual display means or aural display means such as a buzzer or a chime may be used.
In the above embodiment, in the case of an abnormality other than the inability to close the valve, an example is shown in which the microcomputer is turned off immediately after closing the solenoid valve etc., but the microcomputer is displayed after the abnormality is displayed for a short time. You may provide so that it may be turned off. The numerical values shown in the above embodiments are examples for explaining the embodiments and can be changed as appropriate.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a gas reheating device (Example).

FIG. 2 is a cross-sectional view showing a main part of a gas supply unit (Example).

FIG. 3 is a chart showing a rotation angle of a cam and an operation of each part (Example).

FIG. 4 is a block diagram showing a connection state of a control circuit (embodiment).

FIG. 5 is a flowchart showing a basic operation of a control circuit (embodiment).

[Explanation of symbols]

 10 Gas Reheating Device (Battery Controlled Combustor) 11 Combustor 12 Gas Supply Means 13 Control Circuit 14 Pilot Burner 15 Main Burner 16 Heat Reheating Heater 31 Gas Supply Channel (Fuel Supply Channel) 32 Solenoid Valve (Open / Close Valve) ) 33 Pilot valve (open / close valve) 34 Main valve (open / close valve) 43 Electromagnetic coil (electric actuator) 51 Electric motor (electric actuator) 61 Microcomputer 62 Dry battery 66 Combustion confirmation lamp (display) 67 Battery confirmation lamp (display) 71 Valve Closing Impossible Detection Means 72 Valve Closing Impossible Response Means 73 Other Abnormality Detection Means 74 Other Abnormality Correspondence Means Psw Pilot Switch (Detection Switch) Msw Main Switch (Detection Switch)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsushi Atsou 2 26 Fukuzumicho, Nakagawa-ku, Nagoya City Rinnai Corporation

Claims (5)

[Claims] 1. A burner for combusting fuel, (b) a fuel supply passage for supplying fuel to the burner, and (c) opening and closing for opening and closing the fuel supply passage by operating an electric actuator. A valve, (d) a control circuit using a microcomputer for controlling the operation of the electric actuator, and (e) supplying operating power to the control circuit,
A battery for supplying operating electric power to the electric actuator; and the control circuit includes (d-1) valve closing failure detection means for detecting that the opening / closing valve cannot be closed, and (d-2) the opening / closing valve. Other abnormality detecting means for detecting an abnormality other than the inability to close the valve; and (d-3) When the inability to close the valve detects inability to close the opening / closing valve, retry of the closing operation or failure to close the valve is detected. A means for responding to the inability to close the valve that displays that it has occurred,
(D-4) The other abnormality detecting means includes another abnormality responding means for stopping energization of the microcomputer after closing the opening / closing valve when detecting an abnormality other than the inability to close the valve. Battery-controlled combustion device. 2. The battery-controlled combustion apparatus according to claim 1, wherein the on-off valve is an electromagnetic valve that opens and closes the fuel supply passage by operating an electromagnetic coil that is the electric actuator, and the electromagnetic valve is a closed valve. By doing so, the combustion of the burner is stopped, and the valve closing failure detection means detects the valve closing failure when the extinction is not confirmed within a predetermined time after the instruction of the valve closing operation. The battery closing combustor is characterized in that the valve closing failure handling means includes an abnormality display means for displaying to the user that the solenoid valve has failed to close. 3. The battery-controlled combustion apparatus according to claim 1, wherein the on-off valve is a control valve that opens and closes the fuel supply passage by operating an electric motor that is the electric actuator, The inability to close the valve is detected from the operating state of a detection switch that detects the operation of the control valve. A battery-controlled combustion apparatus, comprising: retry means for re-instructing the electric motor to perform a valve closing operation after stopping the operation of the motor. 4. The battery control type combustion device according to claim 3, wherein the valve closing incapability responding means controls the control valve even if the retry means performs a predetermined number of retries to stop and restart the electric motor. If the valve cannot be closed, a battery control type combustion apparatus is provided with a retry stop means for stopping the energization of the microcomputer. 5. The battery-controlled combustion apparatus according to claim 1, wherein the burner heats a reheating heat exchanger for reheating the bath. Controlled combustion device.