JP3208465B2 - Combustion device ignition device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for igniting a combustion appliance for mixed gas fuel used in a water heater or the like.

[0002]

2. Description of the Related Art In recent years, with the improvement of living environment, an invention has been made in which ignition noise is reduced as a measure against noise of a burning appliance (for example, see Japanese Patent Application Laid-Open No. 2-293519).

[0003] A conventional ignition device for a combustion appliance will be described below.

As shown in FIG. 1, 1 is a hot water tap, 2 is a tap water inlet, 3 is a tap water flow rate detector, 4 is a heat exchanger, and 5 is a control of combustion air. Supply blower,
Reference numeral 6 denotes an igniter for discharging a piezoelectric device or the like, 7 denotes a gas solenoid valve that opens and closes a fuel gas supply pipe, 8 denotes a gas proportional valve that regulates and supplies a fuel gas supply amount, 9 denotes a burner, and 10 denotes a burner. A flame hole formed on the upper surface of the burner 9, 11 is a combustion chamber, 12
Is a controller, and 13 is an ignition detector.

[0005] The relationship and operation of each component of the ignition device for a combustion appliance comprising the above components will be described.

When the hot water tap 1 is opened, water is supplied from the water inlet 2, passes through the flow detector 3, and flows to the heat exchanger 4. Then, when the flow detector 3 detects water flow, the blower 5 operates, the igniter 6 starts discharging, the gas solenoid valve 7 opens, the gas proportional valve 8 opens, and the fuel gas is supplied to the burner 9 by a solid line. With the arrows, the combustion air is supplied as indicated by the dashed arrows. The gas mixture of the fuel mixed in the burner 9 and the combustion air is supplied from the flame hole 10 of the burner 9 to the combustion chamber 11.
And ignited by the discharge of the igniter 6 to form a combustion flame. The gas proportional valve 8 and the blower 5 are controlled by the signal output of the controller 12.

The gaseous fuel mixture is a mixture of fuel and combustion air in a predetermined supply amount based on a predetermined mixing ratio according to the combustion characteristics inherent to the burner 9. Combustion characteristics due to changes in the specific gravity of the fuel and the combustion air by temperature of air as environmental conditions, deterioration influenced by the state of formation of the combustion flame
I do. Therefore, the setting range of the operating environment conditions such as the temperature of the air is narrow, and in actual use, the operating environment condition easily exceeds the set range, and the burner 9 may lose its ability to perform a good ignition operation . An abnormal sound was repeatedly generated many times.

[0008]

However, in the above-mentioned conventional configuration, no countermeasure is taken even when an abnormal sound is generated at the time of ignition. Therefore, the same ignition operation is performed at the subsequent ignition, and the abnormal sound is generated many times. It had the problem of being repeated.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an ignition device for a burning appliance which satisfactorily ignites in accordance with the use environment conditions.

[0010]

To achieve this object, an ignition device for a combustion apparatus according to the present invention comprises a burner for burning a gaseous fuel mixture of fuel and combustion air, and igniting a gaseous fuel mixture from the burner. An igniter for burning, a temperature detector for indirectly or directly detecting an air temperature, a controller for controlling a mixing ratio (air-fuel ratio) of fuel and combustion air based on an output from the temperature detector, and an abnormality in the burner. The entire temperature change range in which the igniter is used is divided by a temperature change width that is a reference air-fuel ratio that can ignite without generating noise, and the burner emits an abnormal sound for each of the divided temperature ranges. The reference air-fuel that can ignite without generating
A split storage device for storing the respective supply amounts of fuel and combustion air as a ratio , wherein the controller supplies each of the fuel and combustion air in a divided division temperature range corresponding to the detected temperature from the temperature detector. The amount is read from the divided storage unit, and the ignition operation to the burner is instructed by using the mixed gas fuel of each supply amount.

[0011]

According to the present invention, the fuel and the combustion air that match the air temperature in use in the division temperature range stored in the division memory corresponding to the temperature detected by the temperature detector are supplied to the burner. And it will ignite reliably.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 showing one embodiment of the present invention, the same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. What
In this embodiment, the supply temperature of tap water linked to the temperature change
(Hereinafter referred to as water temperature)
Will be explained. As shown in FIG. 1, this embodiment is characterized in that an ignition sound detector 14 for detecting a sound pressure level of an ignition sound and a temperature of tap water supplied to the heat exchanger 4 are different from those of the above-described conventional configuration. Is added to the water temperature detector 15 for detecting the temperature and the divided memory 16 for the controller 12.

As a preparatory work, based on past weather data,
Tap water supply temperature (water temperature) linked to annual temperature change T
Then, except for the abnormal values due to abnormal weather, as shown in FIG. 2, the range between the high temperature TH and the low temperature TL is set as the fluctuation between the years.

Here, the gas supply amount Q and the supply of combustion air are provided.
An ignition confirmation test was performed while changing the feed amount A, and the burner 9
A water temperature width ΔT is determined until a reliable ignition operation is performed at a sound pressure equal to or lower than a predetermined level without generating a normal sound . At this time,
Fixing the gas supply amount Q and the combustion air supply amount A, respectively,
The reference air-fuel ratio m (m = Q / A) is set and ignition and ignition combustion are performed. And this determines the temperature width ΔT of the burner 9 can reliably ignition operation.

From the maximum temperature Tmax and the minimum temperature Tmin, the entire water temperature range T is set to T = Tmax-Tmin, and the water temperature range T is divided and divided. A width .DELTA.TB is given to the divided boundary to allow a margin for switching. In this example, the division temperature range ΔTA =
It is divided into four by T / ΔT. Note that the maximum temperature Tmax
And the minimum temperature Tmin also have a margin of ΔTB / 2.
You . The temperatures Ts, T1, T2, T
When the boundaries of 3 and Te are set and a dividing line parallel to the horizontal axis is drawn, the divided areas a, b, c,... Below a predetermined level which has been determined by the experiments on the respective partition zone a like
<br/> becomes equal to the reference air-fuel ratio m that a reliable ignition operation by the sound pressure and the supply amount Q1 A1, Q2 and A2, ......, Q6 and A6
The thought combustion characteristics of the burner 9, sets giving change in some amount. If reliable ignition characteristics in the ignition confirmation test in each segment region a and the like are checked and be available, annual time to the divided memory unit 16 0, t1, t2, ......, suit lapse sequence of t6, the The supply amounts Q1 and A1 of the gas and the combustion air in the section a and the like are input and stored.

In the embodiment thus constructed,
When the controller 12 receives a signal from the water temperature detector 15 or other various sensors or setting devices (not shown) as a hot water supply start signal , the controller 12 generates a detection signal from the water temperature detector 15 (for example, the temperature TX shown in FIG. 2). Depending on the usage environment conditions, ie division by division
Assuming that the temperature range ΔT is at C,
By reading the corresponding supply amounts Q3 and A3, instructing the gas proportional valve 8 and the blower 5 to supply the mixed gas fuel to the burner 9, and instructing the igniter 6 to perform the ignition operation, the water temperature T
The ignition operation can be performed smoothly by always automatically selecting the optimum combustion condition according to the change of the ignition timing.

As shown in FIG. 3, if the ignition sound detector 14 detects the occurrence of abnormal sound due to abnormal weather or the like (S
6) From the subsequent ignition operation, the annual time (season) advances.
Supply quantity Q from the divided memory 16 as being out of the following sequence
4, A4 is selected, the air supply amount A of the blower 5 is changed, and the gas solenoid valve 7 is opened to change the supply amount Q of the gas proportional valve 8 (S8). Since the ignition is performed, the ignition sound detector 14 detects normal ignition (S6).

As described above, the detection signal of the ignition sound detector 14
From the temperature corresponding to instruct the ignition operation using the fuel and the combustion air of different feed amounts stored in the divided memory 16 to
Thus, the temperature range selected and used for the ignition operation can match the temperature in use, and a reliable ignition operation can be expected.

The divided storage units 1 are arranged so that the divided temperature ranges are arranged in an order corresponding to the annual temperature fluctuation, and the supply amounts of fuel and combustion air are stored in comparison.
6, when the abnormal ignition sound is detected by the ignition sound detector 14, the burner 9 is instructed to perform the ignition operation by using the supply amounts of the fuel and the combustion air in the following order in accordance with the storage order of the divided storage unit 16. more providing the structure with the controller 12, using
When the ignition operation fails in the same allowable temperature range when the inside air temperature changes, the controller 12 stores the supply amounts of the fuel and the combustion air stored by the divided storage unit 16 in accordance with the annual change of the air temperature in accordance with the storage order. It is possible to further improve the probability of success of the ignition operation in response to the instruction and the change in the temperature.

Further, a temperature detector linked to the air temperature or the air temperature, and the temperature detected by the temperature detector is compared with the air temperature. The divided storage unit 16 configured to store the supply amount, and the supply of fuel and combustion air in the following order according to the storage order of the divided storage unit 16 when an abnormal ignition sound is detected by the ignition sound detector 14. By providing the controller 12 that instructs the burner 9 to perform the ignition operation using the amount, the controller 12 that has received the detection signal of the temperature detector burns the burner with the fuel and combustion air corresponding to the detection signal. The ignition operation is instructed to automatically respond to a change in temperature, and the ignition state in which an abnormal sound is generated can be avoided from the subsequent ignition operation.

In this embodiment, when the ignition device is a heater for controlling the air temperature, the air temperature sensor may also be used as the temperature detector, and the liquid fuel such as white kerosene may be used for combustion with the combustion air. The present invention can be similarly applied to an ignition device of a combustion device that performs combustion.

[0023]

By the present invention As is clear from the above description of the embodiments according to the present invention lever, in which can be realized igniter excellent combustion appliances to favorably ignited in response to the use environment conditions.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an ignition device for a combustion appliance according to an embodiment of the present invention.

FIG. 2 is a characteristic diagram of supply amounts of fuel gas and combustion air corresponding to a change in water temperature of an ignition device of the combustion apparatus.

FIG. 3 is a flowchart of an operation of the ignition device of the combustion appliance.

FIG. 4 is a schematic configuration diagram of an ignition device of a conventional combustion device.

[Explanation of symbols]

Reference Signs List 6 igniter 9 burner 12 controller 14 ignition sound detector 15 water temperature detector 16 divided memory

Claims (3)

(57) [Claims] A burner for burning a gaseous fuel mixture of fuel and combustion air; an igniter for igniting and burning the gaseous fuel mixture from the burner; a temperature detector for detecting a water temperature; A controller for controlling a mixing ratio (air-fuel ratio) of fuel and combustion air based on the output, and a reference air-fuel ratio capable of igniting the burner without generating abnormal noise.
The entire air temperature change range using the igniter is divided and divided by the water temperature change width, and the reference air-fuel ratio that allows the burner to ignite without generating abnormal noise for each of the divided and divided temperature ranges. Supply of different fuel and combustion air
A divided storage device for storing the amounts of fuel and combustion air in a divided division temperature range corresponding to the temperature detected by the temperature detector, from the divided storage device. An ignition device for a combustion appliance configured to instruct an operation of igniting the burner using a supplied amount of the mixed gaseous fuel. 2. A burner for burning a gaseous fuel mixture of fuel and combustion air, an igniter for igniting and burning the gaseous fuel mixture from the burner, a temperature detector for detecting air temperature, A controller for controlling a mixing ratio (air-fuel ratio) of fuel and combustion air based on the output, and a reference air-fuel ratio capable of igniting the burner without generating abnormal noise.
The entire air temperature change range using the igniter is divided and divided by the temperature change width, and the reference air-fuel ratio that allows the burner to ignite without generating an abnormal sound for each of the divided temperature ranges obtained by the division. Supply of different fuel and combustion air
A divided storage device for storing the amounts of fuel and combustion air in a divided division temperature range corresponding to the temperature detected by the temperature detector, from the divided storage device. An ignition device for a combustion appliance configured to instruct an operation of igniting the burner using a supplied amount of the mixed gaseous fuel. 3. An ignition sound detector for detecting a sound pressure of an ignition sound when the gaseous fuel mixture is ignited, and the divided memory stores the divided divided temperature ranges in an order corresponding to the annual temperature fluctuation. When the controller detects an abnormal ignition sound with the ignition sound detector, the controller determines the supply amounts of the fuel and the combustion air in the following divisional division temperature range according to the storage order of the division storage unit. The ignition device for a combustion appliance according to claim 2, wherein the ignition device is used to instruct the burner to perform an ignition operation.