JP3538946B2 - Combustion control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion control device,
More specifically, the present invention relates to a combustion control device having a function to cope with a case where combustion stops in a gas combustion device such as a water heater due to an instantaneous power failure or an instantaneous voltage drop due to a lightning strike, a power transmission accident, or the like.

[0002]

2. Description of the Related Art Conventionally, in a gas combustion device such as a water heater, when the combustion is stopped due to an instantaneous power failure or an instantaneous voltage drop due to a lightning strike, power transmission accident, accident at a customer premises, etc., for example, a flowchart shown in FIG. As described above, if an instantaneous power failure or an instantaneous voltage drop continues for a predetermined time or more, it is determined in step 500 whether or not the voltage is equal to or higher than a certain voltage by the voltage monitoring means of the sequence control circuit. If no flame is detected by the flame detecting means in step 501, a misfire abnormality occurs in the middle (step 502).
There is also a structure in which it is detected again at step 503 whether or not the voltage is equal to or higher than a predetermined voltage, and when the voltage is lower than the predetermined voltage, the sequence control circuit is reset at step 504.

[0003]

However, in a gas-fired appliance such as a water heater having such a combustion control function, when an instantaneous power failure or instantaneous voltage drop occurs, almost all users will not notice it. In addition, in view of the load of the solenoid valve and the burner performance, a certain time (for example, 0.
After about 0.6 to 0.12 seconds), the combustion stops and the fire stops on the way. Therefore, the hot water supply stops the automatic hot water supply on the way due to the misfire, or the hot water becomes water during the shower. When the power is restored after the power-off reset, the ignition starts (re-ignition). For example, in the case of a power failure due to an earthquake or the like, the gas pipe is cracked. There is a problem that there is a risk of gas leakage due to the above.

[0004] The combustion control device of the present invention solves the above-mentioned problems, and automatically recovers in the event of an instantaneous power failure or instantaneous voltage drop due to a lightning strike or power transmission accident, but stops in the event of an unexpected event such as an earthquake. The purpose of the present invention is to provide a combustion control device which is easy to use and has high safety.

[0005]

To solve the above problems SUMMARY OF THE INVENTION The combustion control apparatus according to the present invention, blackout, the power supply voltage monitoring means M 30 for detecting a voltage drop, a timer means M 31 for counting the time, flame detection means M 32 for detecting the presence or absence of a flame
Has the door, in the combustion control device connected to them to the sequence circuit M 33, the supply voltage monitor means M 30 detects a power failure or a voltage drop, a momentary power failure or within a certain time the timer means M 31 is timed and reignition means to continue the combustion and re-ignition when the flame detecting means M 32 in the instantaneous voltage drop is detected without flame, the sequence circuit
Power failure, voltage by connecting set temperature storage means M34 to M33
The set temperature before descent is stored in the set temperature storage means M34
After an instantaneous power failure or instantaneous voltage drop within a certain period,
The gist of the present invention is to provide a re-return control means that does not return when the constant temperature is high .

[0006]

[Action] combustion control apparatus of the invention having the above structure,
Lightning during use of the gas burning appliance water heater, etc., a power failure or a voltage drop by the power accident occurs, which is detected by the power supply voltage monitoring unit M 30, the power failure or a voltage drop time timer means M 31 The flame detection means M 32 counts during an instantaneous power failure or instantaneous voltage drop within a predetermined period of time.
When it detects that there is no flame, the re-ignition means operates to continue combustion and enable continuous use. As a result, even if the combustion is stopped due to an instantaneous power failure or an instantaneous voltage drop, if the instantaneous power failure or the instantaneous voltage drop within a certain period of time, the operation is automatically restored. However, if the power failure or voltage drop continues for a certain period of time or longer, the combustion stop state is maintained and no re-ignition occurs.

[0007] Then, in the combustion control device, a power failure, and stores the set temperature before the voltage drop at a set temperature storing unit M34, after instantaneous power failure or instantaneous voltage drop of a predetermined within a predetermined time, the setting temperature When the temperature is high, it is not restored by the restoring control means. As a result, there is no danger of burns or the like due to the discharge of hot water. However, when the set temperature is normal temperature, the operation automatically returns again to continue the combustion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of a combustion control device of the present invention will be described below with reference to the drawings.

[0009] Real施例view of the present invention 3 (b), a flow diagram illustrating (b) is illustrated a block diagram a basic configuration of a combustion control device and (b) a control routine, the basic Fig. 3 (a)
As shown in FIG. 2, a power supply voltage monitoring means M30 for detecting a power failure and a voltage drop, a timer means M31 for counting a power failure and a voltage drop time detected by the power supply voltage monitoring means M30, and a flame of a gas burner or the like. A flame detecting means M32 for detecting the presence or absence of
13 and connected to each other. The set temperature storage means M is stored in the sequence circuit M33.
34, the set temperature before the power failure and the voltage drop is stored in the set temperature storage means M34, and after the instantaneous power failure or the instantaneous voltage drop within a predetermined time (for example, about 0.12 seconds), the set temperature is set. There is provided a reset control means which does not reset when the temperature is high.

When a power failure or a voltage drop occurs due to a lightning strike, a power transmission accident, an accident at a customer premises, etc., the power is almost completely recovered in 0.07 to 0.2 seconds by the restoration and protection mechanism of the power company. Many gas-fired appliances, such as steam generators, misfire in about 0.1 second due to the load on the solenoid valve and the burner performance. Therefore, as shown in the flowchart of FIG. 3B, when the power supply voltage monitoring means M30 detects a power failure in step 300, the set temperature before the power failure is stored in the set temperature storage means M34 in step 301, and In step 302, the timer means M31 starts counting the power failure time. Next, the timer 303 measures the time during an instantaneous power failure within a predetermined period of time.
When the flame detection means M32 detects no flame and the set temperature is high (step 304), the re-restriction restricting means operates to keep the combustion stopped without re-return (step 305). However, if the set temperature in step 304 is the normal temperature, the process automatically returns again and the combustion is continued (step 306). In this control routine, the case of a power failure has been described, but the same applies to the case of a voltage drop.

[0011] have been described for the embodiment of this invention, the present invention is not limited to such an example,
It goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.

[0012] Reference Example Figure 1 (a), (b) is a block diagram illustrating a basic configuration of a combustion control device and (b), a flow chart illustrating the control routine (b), the basic As shown in FIG. 1A, a power supply voltage monitoring means M10 for detecting a power failure and a voltage drop, and a timer means for counting a power failure and a voltage drop time detected by the power supply voltage monitoring means M10. M11 and flame detecting means M12 for detecting the presence or absence of a flame such as a gas burner are connected to and incorporated in a sequence circuit M13. Then, the power supply voltage monitoring means M10 detects a power failure or voltage drop due to a lightning strike, a power transmission accident, or the like, and the timer means M11 measures an instantaneous power failure or an instant within a predetermined time (for example, about 0.12 seconds). When the flame detecting means M12 detects no flame (combustion stop) during the voltage drop, the flame detecting means M12 is provided with a re-ignition means for re-ignition and continuing the combustion.

When a power outage or a voltage drop occurs due to a lightning strike, a power transmission accident, an accident at a customer premises, etc., the power is almost completely recovered in 0.07 to 0.2 seconds by the restoration and protection mechanism of the power company. Many gas-fired devices, such as gas burners, misfire in about 0.1 second due to the load on the solenoid valve and the burner performance. Therefore, as shown in the flowchart of FIG.
When a power failure is detected, the timer means M
11 starts counting the power outage time. Timer means M
When the time counting by 11 has passed a predetermined time, the burner combustion is immediately stopped, and an unexpected situation such as an earthquake is dealt with (step 102). However, if the flame detection means M12 detects no flame in step 103 during an instantaneous power failure within a predetermined period of time measured by the timer means M11, the re-ignition means operates in step 104 to re-ignite the burner. Continue burning. In this control routine, the case of a power failure has been described, but the same applies to the case of a voltage drop.

[0014] Reference Example 2 (b), and (b) is illustrated a block diagram a basic configuration of a combustion control device (b), a flow chart illustrating the control routine, the basic structure FIG.
As shown in (a), the power supply voltage monitoring means M20 for detecting a power failure and a voltage drop, and the power supply voltage monitoring means M
A timer means M21 for counting a power failure and a voltage drop time detected by 20; and a flame detection means M22 for detecting the presence or absence of a flame such as a gas burner, which are connected to and incorporated in a sequence circuit M23, respectively. It has become. The storage means M2 is stored in the sequence circuit M23.
4 to store information before power failure and voltage drop (for example, usage state such as hot water supply temperature) in the storage means M24, and within a predetermined period of time (for example, about 0.12 seconds).
After an instantaneous power failure or an instantaneous voltage drop, automatic return means is provided to automatically return to the state before the power failure or voltage drop.

When a power outage or a voltage drop occurs due to a lightning strike, a power transmission accident, an accident at a customer premises, etc., the power is almost recovered within 0.07 to 0.2 seconds by the restoration and protection mechanism of the power company. Many gas-fired devices, such as gas burners, misfire in about 0.1 second due to the load of the solenoid valve and the burner performance. Therefore, as shown in the flowchart of FIG.
When a power failure is detected, the storage state before the power failure is stored in the storage unit M24 in step 201, and
At 3, the timer means M21 starts counting the power outage time. When the time measured by the timer means M21 exceeds a predetermined time, the combustion of the burner is immediately stopped to cope with an unexpected situation such as an earthquake (step 202). However, during the momentary power failure within a predetermined period of time, the time measurement by the timer means M21 is performed at step 204.
If no flame is detected, the automatic return means operates in step 205 to return to the use state before the power failure and continue the combustion. Note that, in this control routine, the case of a power failure has been described, but the same applies to the case of a voltage drop.

[0016] Reference Example 4 (a), (b) is a flowchart illustrating basic exemplary block diagram the structure and (b) the control routine of the combustion control device, the basic construction diagram 4 (a)
As shown in FIG. 3, a power supply voltage monitoring means M40 for detecting a power failure and a voltage drop, a timer means M41 for counting a power failure and a voltage drop time detected by the power supply voltage monitoring means M40, and a flame such as a gas burner. A flame detecting means M42 for detecting the presence or absence of
43 and connected to each other. The set temperature storage means M is stored in the sequence circuit M43.
44, the set temperature before the power failure and the voltage drop is stored in the set temperature storage means M44, and after the instantaneous power failure or the instantaneous voltage drop within a predetermined time (for example, about 0.12 seconds), the setting is performed. When the temperature is high, a resetting means is provided for lowering the set temperature to a safe temperature and returning again.

When a power outage or a voltage drop occurs due to a lightning strike, a power transmission accident, an accident at a customer premises, etc., the power is almost completely recovered in 0.07 to 0.2 seconds by the restoration and protection mechanism of the power company. Many gas-fired appliances, such as steam generators, misfire in about 0.1 second due to the load on the solenoid valve and the burner performance. Therefore, as shown in the flowchart of FIG. 4B, when the power supply voltage monitoring means M40 detects a power failure in step 400, the set temperature before the power failure is stored in the set temperature storage means M44 in step 401, and In step 402, the timer means M41 starts counting the power outage time. Next, the time measurement by the timer means M41 is performed during an instantaneous power failure within a predetermined period of time.
If the flame detecting means M42 detects no flame and the set temperature is high (step 404), the resetting means works to lower the set temperature to a safe temperature and automatically return to continue combustion (step 405). . However, if the set temperature in step 404 is the normal temperature, it is automatically returned again and its combustion is continued (step 406). In this control routine, the case of a power failure has been described, but the same applies to the case of a voltage drop.

[0018]

Combustion control apparatus described above the invention exhibits, lightning during use of gas-fired appliances water heater or the like, if the instantaneous power failure or instantaneous voltage drop due to the power transmission accident or the like occurs, instant within a predetermined time If no flame is detected during a power failure or instantaneous voltage drop, re-ignition is performed to continue burning the burner.For example, in a water heater, automatic hot water supply is stopped halfway, or hot water becomes water during a shower. When the time measured by the timer means has passed a certain time, the burner combustion is immediately stopped. Therefore,
It is very easy for the user to use, and can cope with an unexpected event during an earthquake, improving safety.

[0019] Then, combustion control apparatus according to the present invention, a power outage, stored at the set temperature storing means the set temperature before the voltage drop, when the combustion by instantaneous power failure or instantaneous voltage drop is stopped, momentary power failure within a predetermined time period Or, after the instantaneous voltage drop, if the above set temperature is high, it will not be returned again, so there is no danger of burns due to the discharge of hot water and it is safe to use, and if the set temperature is room temperature, it will automatically return again. As the combustion continues, it becomes easy to use.

[Brief description of the drawings]

FIG. 1 is a block diagram (a) illustrating a basic configuration of a reference example , and a flowchart (b) illustrating a control routine thereof.

FIG. 2 is a block diagram (a) illustrating a basic configuration of a reference example , and a flowchart (b) illustrating a control routine thereof.

3 is a block diagram illustrating the basic structure of the real施例of the invention and (a) is a flow chart (B) illustrating the control routine.

FIG. 4 is a block diagram (a) illustrating a basic configuration of a reference example , and a flowchart (b) illustrating a control routine thereof.

FIG. 5 is a flowchart showing a control routine of a conventional example.

[Description of Signs ] M30 power supply voltage monitoring means M31 timer means M32 flame detection means M33 sequence circuit M34 set temperature storage means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-155119 (JP, A) JP-A-61-72927 (JP, A) JP-A-58-133521 (JP, A) JP-A-62 213615 (JP, A) JP-A-60-64124 (JP, A) JP-A-61-110813 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23N 5/24 110 F23N 5/02 343

Claims (1)

(57) [Claims] 1. Combustion control comprising power supply voltage monitoring means for detecting a power failure or voltage drop, timer means for counting the time, and flame detection means for detecting the presence or absence of a flame, which are connected to a sequence circuit. In the apparatus, when the power supply voltage monitoring means detects a power failure or a voltage drop, and when the flame detection means detects no flame during an instantaneous power failure or an instantaneous voltage drop within a predetermined time measured by the timer means, re-ignition is performed. and reignition means to continue the performed combustion, stop and connect the set temperature storing unit to the sequence circuit
The set temperature before power and voltage drop is stored in the set temperature storage means.
After an instantaneous power failure or instantaneous voltage drop within a certain period,
A means for restricting re-return when the constant temperature is high
Combustion control apparatus characterized by comprising a.