JP2000020101A - Controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller which can accurately execute the control coping with abnormality while preventing unnecessary power supply as much as possible. SOLUTION: A control means C is the controller which is so constituted that it may execute the operation control to control the operation of electric operation parts 7 and 14 in the power supply state and may execute the control coping with abnormality in accordance with abnormality discrimination. A controlled switching means S is provided which intermits power supply to the control means C from a power source D and is opened/closed based on an operation command of the control means C, and the control means C issues the operation command for the power non-supply state to the controlled switching means S when executing the operation control as normal because of abnormality non-discrimination but issues the operation command for the power supply state to the controlled switching means S so as to keep the state of power supply to the means C itself when executing the control coping with abnormality because of abnormality discrimination.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control means for controlling the operation of a motorized operating part, and a manually operated opening / closing means for intermittently supplying power from a power source to the motorized operating part and the control means. The control means is configured to execute an operation control for controlling the operation of the electric operating section in a power supply state, and to execute an abnormality handling control as the abnormality is determined. Control device.

[0002]

2. Description of the Related Art Conventionally, in the above-described control device, the abnormality handling control is performed in accordance with the determination of an abnormality only when power is supplied to the control unit by closing operation of a manually operated opening / closing unit. It is known that, once the power supply is cut off by the opening operation of the manually operated opening / closing means, the abnormality handling control is reset.

[0003]

Therefore, for example,
In the case where the occurrence of an abnormality is stored as the abnormality response control, once the power supply is cut off by opening the manually operated opening / closing means, the occurrence of the abnormality is reset, and the abnormality response control may not be properly executed. There is. Further, if power is continuously supplied to the control means even if the manually operated opening / closing means is opened to solve this disadvantage, power will be wasted and the standby power will be increased. There was a problem.

Accordingly, the present invention has been made in view of such a point, and a purpose of the present invention is to provide a control device capable of executing abnormality handling control accurately while preventing useless power supply as much as possible. The point is to provide.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, the supply of power from the power supply to the control means is intermittently performed, and based on an operation command of the control means. Controllable opening / closing means for opening / closing operation is provided, and the control means issues an operation command for a non-power supply state to the controllable opening / closing means when performing operation control as normal without determining abnormality. When a command is issued, the abnormality is determined, and the abnormality response control is executed, a power supply state operation command is issued to the control-type opening / closing means so that the power supply state to itself is maintained. Have been. Therefore,
When an abnormality is not determined, an operation command for a non-power supply state is instructed to the control-type opening / closing means. An operation command for the power supply state is instructed to the opening / closing means, and power is supplied to the control means, so that the abnormality handling control can be executed accurately.

According to the second aspect of the present invention, since the power source is a battery, for example, when the control device is applied to a device which is supplied with power by a battery, such as an instantaneous water heater or a gas stove. Thus, it is possible to accurately execute the abnormality handling control while avoiding the early consumption of the battery.

According to the third aspect of the present invention, the electric operating section is a combustion operating section having a combustion burner, and the control means detects the abnormal combustion of the combustion operating section as the abnormality. Therefore, it is possible to detect a combustion abnormality of the combustion operating portion such as incomplete combustion of the combustion burner or exhaust gas blockage, and it is possible to appropriately execute abnormality handling control accompanying the abnormality detection. .

According to the fourth aspect of the present invention, the control means stops the combustion of the combustion operating section as abnormality handling control,
In addition, since a combustion stop control for prohibiting the start of combustion is executed until a reset command is issued, abnormal combustion in the combustion operating portion such as incomplete combustion of the combustion burner or exhaust gas blockage occurs. Thus, it is possible to reliably prevent the fuel from being burned in the state in which the fuel is kept.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which a control device according to the present invention is applied to an instantaneous water heater will be described with reference to the drawings. As shown in FIG. 1, the instant water heater includes a fin tube type heat exchanger 2 above a cylinder 1 forming a combustion chamber of a gas burner B as a combustion burner. , A water supply channel Wi and a hot water supply channel Wo are connected.

The water supply passage Wi is provided with a water stop valve 3, a water governor 4 for adjusting the water supply amount in response to a change in water pressure, and a water supply amount to the heat exchanger 2 and a hot water passage W through a bypass passage Wb.
A flow dividing valve 5 for adjusting the ratio of the bypass water to the amount of bypass water supplied to o is interposed, and a water tap 6 is connected to the hot water supply path Wo via a flexible pipe. The gas burner B
A water supply responsive to an electromagnetically operated shut-off valve 7 and an interlocking rod 4a interlocked with the water governor 4 in response to the operation of an electromagnetically operated shut-off valve 7 and a water pressure Valve 8,
A gas governor 9 for maintaining the supply pressure of the fuel gas at an appropriate pressure, and an adjustment valve 10 for adjusting the supply amount of the fuel gas are provided.

The first thermocouple 1 outputs an electromotive force corresponding to the temperature of the combustion flame of the gas burner B in order to detect abnormal combustion such as incomplete combustion of the gas burner B and exhaust gas blockage.
5. Based on the fact that the temperature near the second thermocouple 18 and the gas nozzle 19 becomes abnormally high, the second thermocouple 18 outputs an electromotive force having a polarity opposite to that of the first thermocouple 15 in accordance with the temperature inside the barrel 1. A temperature fuse 17 for the vicinity of the nozzle to be blown and a temperature fuse 16 for the cylinder body to be blown when the temperature near the outer periphery of the cylinder 1 becomes abnormally high are provided. Further, an alarm lamp is provided for notifying the abnormal combustion as the abnormal combustion is determined.

The first thermocouple 15 uses a metallic thermocouple mounting plate so that the heat-sensitive portion is located inside the combustion flame in a normal combustion state, and the plus side thereof is electrically connected to the thermocouple mounting plate. It is provided so that it may be connected to. Further, the second thermocouple 18 has a temperature measuring opening 1 formed in the cylinder body 1 as a heat-sensitive portion.
a.

The temperature fuse 17 for the vicinity of the nozzle and the temperature fuse 18 for the cylinder body have the same configuration, respectively.
Although not shown, a fuse element with a lead wire connected to each of both ends is inserted into a flexible and heat-resistant tube, and two places on the outer periphery of the tube are bound with a binder and fixed in the tube. The temperature fuse 17 for the vicinity of the nozzle is disposed so as to be located near the lower part of the gas nozzle 19 corresponding to the gas burner B, and the temperature fuse 18 for the cylinder body is provided at the outer peripheral portion of the cylinder body 1. It is arranged near the back side.

Then, as shown in FIG. 2, the first thermocouple 1
5, the temperature fuse 17 for the vicinity of the nozzle, the temperature fuse 16 for the cylinder body, and the negative terminal of the second thermocouple 18 are connected in series, and the plus terminal of the first thermocouple 15 and the second thermocouple are connected. Each of the plus terminals of the pair 18 is connected to the input terminals a and b of the controller C. In other words, the second thermocouples 18 and the thermocouples 15 and 18 have a polarity opposite to that of the first thermocouples 15.
Are input to the input terminals a and b.

The operation of the instant water heater having such a configuration is controlled by a controller C as control means.
In the power supply state, the controller C performs a hot water supply process for performing an operation control for supplying hot water to the tapping tool 6 in accordance with a pushing operation of the pushbutton type tapping operation tool 11, and a combustion abnormality of a combustion operating unit including the gas burner B. The combustion abnormality detection process to be detected, the combustion is stopped along with the determination of the combustion abnormality, and
Until a reset command is issued, each of the abnormality handling processes for executing the combustion stop control for inhibiting the start of combustion is executed.

As shown in FIG. 2, the power supply from the battery D as a power supply to the controller C is basically turned ON / OFF by pushing the tapping operation tool 11.
The operation of the operation micro switch 12 is interrupted by the operation micro switch 12 as a manually operated opening / closing means, and whether or not the controller C detects a combustion abnormality.
The power supply is interrupted by a switch means S provided as a control-type opening / closing means provided in parallel with the power supply 2. That is,
When the controller C detects the abnormal combustion, it issues an operation command for the power supply state to the switch means S, the power supply state is maintained by the switch means S, and the controller C operates normally without detecting the abnormal combustion. When the operation is performed as described above, an operation command for the non-power supply state is instructed to the switch means S, so that the power supply to the controller C by the switch means S is stopped.

As described above, when the combustion abnormality is not determined, the operation command for the non-power supply state is instructed to the switch means S, and the combustion is performed without supplying unnecessary power to the controller C itself. When an abnormality is determined,
An operation command for a power supply state is instructed to the switch means S to supply power to the controller C, and the power supply to the controller C by the operation microswitch 12 is cut off by the pushing operation of the tapping operation tool 11. Also, it is possible to accurately execute the abnormality handling process.

The hot water supply process will be described. When the push button type tapping operation tool 11 is pressed, the operation micro switch 12 is turned on, and at the same time, the water stop valve 3 is opened in conjunction with the pushing operation of the tapping operation tool 11. In response to the water pressure flowing into the water governor 4, the interlocking rod 4a interlocked with the water governor 4 is actuated by the water pressure responsive valve 8.
The hydraulic micro switch 13 is turned on in response to the direction in which the valve is opened. When the operation micro switch 12 and the hydraulic micro switch 13 are turned on, the controller C
The spark plug 14 is sparked, and an attraction current is applied to the coil of the shutoff valve 7 to open the shutoff valve 7.

Therefore, the fuel gas is supplied to the gas burner B from the gas supply path G and the ignition plug 1
4, the first thermocouple 15 is heated by the combustion of the gas burner B, and the first thermocouple 1 accompanying the heating is heated.
Due to the electromotive force of 5, the adsorption current continues to flow from the controller C to the coil 7a of the shut-off valve 7, and the opening of the shut-off valve 7 is maintained. That is, the gas burner B, the shut-off valve 7, the ignition plug 14, and the like constitute a combustion operating section. Then, the water from the water supply passage Wi passes through the water stop valve 3 and the water governor 4 and is divided by the branch valve 5, and a part of the water flows into the heat exchanger 2 while the rest flows into the bypass passage Wb.
Flows into the hot water supply channel Wo through the hot water supply path, and is mixed with the hot water from the heat exchanger 2, and the hot water having the proper temperature is discharged from the hot water dispenser 6.

When the tapping operation tool 11 is pressed again in the above tapping state, the water stop valve 3 is closed in conjunction with the pushing operation, and the stoppage of water to the water governor 4 is stopped.
The interlocking rod 4a responds in a direction to close the hydraulic pressure responsive valve 8, closes the hydraulic pressure responsive valve 8, shuts off the supply of the fuel gas to the gas burner B, and stops the combustion. Further, as the combustion of the gas burner B stops, the electromotive force of the first thermocouple 15 disappears, the controller C stops flowing the adsorption current to the coil 7a of the shut-off valve 7, and the shut-off valve 7 is also closed.

Next, the combustion abnormality detecting process will be described. The amount of the primary air for combustion sucked from the receiving port 20 of the gas burner B becomes abnormally small, or the oxygen concentration in the primary air for combustion becomes abnormally low. Then, the gas burner B causes incomplete combustion, so that the combustion flame becomes longer or the combustion flame unexpectedly rises and disappears. Therefore, as shown in FIG. 3A, the electromotive force V1 of the first thermocouple 15 decreases, and the total value Vt of the electromotive forces of the thermocouples 15 and 18 decreases accordingly. Electromotive force determination level Vs
It is determined that the combustion is abnormal because it is below t.

Further, when combustion products and dust in the combustion gas adhere to the heat exchanger 2 and the combustion gas passage of the heat exchanger 2 becomes narrow, the amount of the combustion gas remaining in the cylinder 1 increases. hand,
The ambient temperature in the barrel 1 increases. Due to such exhaust blockage, the ambient temperature inside the cylinder body 1 increases, and the temperature measurement opening 1a
As shown in FIG. 3B, the high-temperature combustion gas flows out, and the electromotive force V2 of the second thermocouple 18 increases. This electromotive force V2 is equal to the electromotive force V1 of the first thermocouple 15. Are opposite polarities, so that the total value Vt of the electromotive force of each thermocouple 15, 18
Decreases below the electromotive force determination level Vst for steady operation,
It is determined that combustion is abnormal.

If the atmospheric temperature in the cylinder 1 becomes abnormally high due to the adhesion of combustion products and dust in the combustion gas to the heat exchanger 2, the cylinder fuse 16 is blown. When a part of the fuel gas ejected from the gas nozzle 19 leaks out of the receiving port 20 due to the formation of a spider web or the accumulation of dust in the receiving port 20 of the gas burner B, the leaked gas is discharged from the gas burner B. When the temperature in the vicinity of the gas nozzle 19 becomes abnormally high due to ignition or burning by the combustion flame, the nozzle vicinity temperature fuse 17 is blown. When the temperature fuse 16 for the cylinder body is blown or the temperature fuse 17 for the vicinity of the nozzle is blown in this manner, the total value Vt becomes substantially zero, and it is also determined that the combustion is abnormal.

Next, the abnormality handling process will be described.
In the above-described abnormality detection processing, when it is determined that the combustion is abnormal, the alarm lamp is turned on, the flow of the adsorption current to the coil 7a of the shut-off valve 7 is stopped, the shut-off valve 7 is closed, and the combustion of the gas burner B is started. Is stopped, and furthermore, the occurrence of the combustion abnormality is stored, and the adsorption current is not passed through the coil 7a of the shut-off valve 7 until a reset operation is performed by pressing the tapping operation tool 11 again to issue a reset command. Then, the combustion of the gas burner B is not started.

If the above-mentioned combustion abnormality is detected continuously for a set number of times or more within a set time, the above-mentioned tapping operation tool 1 will be described.
The reset command is not issued even if the reset operation by 1 is performed, and the reset command is not issued unless the power reset operation is executed. That is, as a power reset operation, the start of combustion of the gas burner B is prohibited until the battery D serving as a power source is once removed and reloaded.

[Another Embodiment] (1) In the above embodiment, the first thermocouple 15 and the second thermocouple 18 are connected in series, and only the total value Vt of their electromotive forces is input to the controller C. Instead of such a configuration, for example, as shown in FIG. 4, both ends of each of the thermocouples 15 and 18 connected in series and an intermediate connection point are electrically connected to the controller C. Therefore, the total value Vt of the output of the electromotive force in each thermocouple 15, 18 and the first
The output value of the electromotive force V <b> 1 of the thermocouple 15 may be configured to be input, or the first thermocouple 15 and the second thermocouple 18 may be individually supplied to the controller C to generate the respective electromotive forces. The controller C is electrically connected in parallel so as to be detectable, and the controller C is configured to separately obtain the detection information of the electromotive force by the first thermocouple 15 and the detection information of the electromotive force by the second thermocouple 18. May be. In this case, the temperature fuse 16 for the cylinder body and the temperature fuse 17 for the vicinity of the nozzle are connected in series, and the thermocouples 15 and 18 are connected in series.
Separately from the controller C.

(2) In the above embodiment, if a reset operation is performed by the tapping operation tool 11 until a combustion abnormality is detected continuously for a set number of times or more within a set time, a reset command is issued and the gas burner B When the abnormal combustion is detected continuously for a set number of times or more within a set time, the start of combustion of the gas burner B is prohibited until a power reset operation is performed. In place of this configuration, when a combustion abnormality is detected, a reset command is always issued by performing a reset operation by the tapping operation tool 11, and the start of combustion by the gas burner B may be enabled. If detected, the start of combustion of the gas burner B may be prohibited until a power reset operation is performed to remove and reload the battery D once.

(3) In the above embodiment, the alarm lamp is turned on when the abnormal combustion is detected. However, the alarm may be notified by an alarm buzzer, or the alarm may be notified by both the alarm lamp and the alarm buzzer. It may be.
Further, the occurrence of abnormal combustion may not be notified without providing an alarm lamp.

(4) In the above embodiment, the temperature fuse 17 for the nozzle vicinity and the temperature fuse 16 for the cylinder body are provided to further improve the safety in use. However, such a fuse is not used. You may.

(5) In the above embodiment, an example in which the present invention is applied to an instantaneous water heater is shown, but the present invention is also applicable to other devices such as a gas stove. In this case, the abnormality is not limited to the combustion abnormality, and may be another abnormality. Further, the power source is not limited to the battery D.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an instantaneous water heater to which the present invention is applied.

FIG. 2 is a control block diagram.

FIG. 3 is a diagram showing an electromotive force generation state;

FIG. 4 is a control block diagram of another embodiment.

[Explanation of symbols]

 7, 14 Combustion operation part as electric operation part 12 Manual operation type opening / closing means B Burner for combustion as electric operation part C Control means D Battery as power supply S Control type opening / closing means

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenji Marusasa 1-152 Oka, Minami-ku, Osaka-shi, Osaka F-term in Harman Corporation (reference) 3K003 EA02 FA02 FB01 GA03 HA02 5H209 AA11 CC01 DD06 FF01 GG13 HH02 HH04

Claims (4)

[Claims] 1. A control means for controlling the operation of an electric operation part, and a manually operated opening / closing means for intermittently supplying power from a power supply to the electric operation part and the control means, wherein the control means The means is a control device configured to execute an operation control for controlling an operation of the electric operating unit in a power supply state, and to execute an abnormality handling control along with determining an abnormality. Interrupting the supply from the power supply to the control means, and
A control-type opening / closing unit that is opened / closed based on an operation command of the control unit is provided. The control unit is configured to perform the operation-type opening / closing when performing the operation control as normal without determining the abnormality. The control-type opening / closing means is configured to instruct an operation command for a non-power supply state to the means, to determine the abnormality and to execute the abnormality response control, so that the power supply state to itself is maintained. A control device configured to issue an operation command for a power supply state to the control device. 2. The control device according to claim 1, wherein the power source is a battery. 3. The electric operating section is a combustion operating section having a combustion burner, and the control means is configured to detect, as the abnormality, a combustion abnormality of the combustion operating section. Item 3. The control device according to item 1 or 2. 4. The control means executes, as the abnormality handling control, a combustion stop control for stopping combustion of the combustion operating portion and prohibiting the start of combustion until a reset command is issued. The control device according to claim 3, which is configured.