JPS5849827A - Combustion controller - Google Patents

Abstract

PURPOSE:To enable on or off control of a pilot burner when a main burner is cut off by interposing a selection switch in a controller for a combustor equipped with the main burner and the pilot burner. CONSTITUTION:A selection switch 15 is interposed in a solenoid valve circuit 13 for controlling the main burner 1 and the pilot burner 2 to select on or off operation of the pilot burner 2. A switch 14 is provided to change over a timer 8 and a temperature sensing device 9. In this arrangement, for example, if the pilot burner 2 is kept on after the main burner 1 is turned off, the combustion is started with the switch 15 on through a selection knob 16. Consequently, after the set time, a switch 7 and the switch 14 are turned off to close a solenoid valve 3. The main burner 1 stops burning while a solenoid valve 10 fails to close with the switch 15 on. Thus, the pilot burner 2 continues to burn.

Description

[Detailed description of the invention] This invention relates to a combustion control device.

/(- Stops combustion after a set time (referred to as a timer cut in this specification), or stops combustion when the heated object heated by the burner reaches a set temperature (referred to as a thermo cut in this specification) ) is convenient because the burner automatically stops smoking when the set heat is reached.

But in this case with the main burner as the burner.

Conventionally, when performing the above-mentioned combustion control on a permanent burner that is ignited by a transfer of flame, there are three types: one in which the combustion of the normal burner is also stopped, and the other in which the combustion of the permanent burner is continued. That is, in the one shown in Fig. 1, the main burner A is the permanent burner B.
A solenoid valve C is provided in the gas flow path of the main burner A and the permanent burner B, and this solenoid valve C
A switch E is interposed in the circuit, and this switch is opened after a set time or when the set temperature is reached by a timer or temperature sensing device F to stop combustion in the main burner A and the regular burner B. Note that G is an on-off valve for the main burner A. In this case, the constant flame burner B will also be extinguished.9 For example, if you want to leave the constant flame burner for heat insulation when used as a bath burner,
Winter, especially, has also disappeared.

In the case shown in FIG. 2, a solenoid valve C is provided in the flow path of only the main burner A to stop only the main burner A after a set time or after reaching a set temperature. Note that H is a well-known misfire safety device. In this case, even if the main burner A goes out, the permanent burner B continues to burn.9 For example, when using a bath bar as shown in L, the normal burner B serves as a heat insulator in the winter, but in the summer it heats up. This causes the inconvenience of raising the water temperature.

Furthermore, when used in an oven, depending on the type of cooking, there are cases in which it is desired to continue burning the burner for heating purposes, and there are cases in which it is desired to stop combustion in the burner, so conventional combustion control devices have the above-mentioned disadvantages.

Therefore, the present invention proposes a combustion control device that does not have the drawbacks mentioned above, and will be described in detail below with reference to the drawings. In Figure 3, 1 is the main burner.

2 is a regular bar that moves to the main burner L and ignites it. Reference numeral 3 denotes a solenoid valve interposed in the gas passage 4 of the main burner l, which is kept open by the power supply 5, but when a switch 7 provided in the solenoid valve circuit 9w1 is turned off, the circuit 6 is opened and the solenoid valve 8 is opened. closes the gas passage 4 and stops combustion in the main burner 1.

This switch 7 is turned off by a timer 8 after a set time elapses, or by a thermosensing device 9 after reaching a set temperature. Since the control of the switch 7 by the timer 8 and the temperature sensing device 9 is a well-known technique, further explanation will be omitted.

Gas flow path 1 of 1011J inburner 1 and ordinary burner 2
This is a solenoid valve interposed in 1, which is kept open by a power source 12. Two switches 14 are connected in parallel to the 2wl magnetic valve circuit 13.
and 15 are provided.

The switch 14 has a timer 8 in the same way as the switch 7.
It is turned off after the set time has elapsed, but it is turned off after the temperature sensing device 9 reaches the set temperature. Another selection switch I5 is turned on or off by a selection knob I6. In other words, the selection switch 15 is on in the case of ``Tokyo No'' of 16, and the selection switch 15 is off in ``9 of 1.'' Note that 17 and 18 are the main switches of circuits 6 and 18. It is opened and closed by knobs 19.

The present invention is as described above, and when it is desired to continue burning the burner 2 even after the timer cut or thermo cut, the selection switch 15 is turned on by the selection knob 16.

Next, the timer 8 sets the time or temperature of the temperature sensing device 9. As a result, the switches 7 and 14 remain on until the set time elapses or the set temperature is reached. Next, when the main switches 17 and 18 are turned on and the ordinary burner 2 is ignited by an ignition means (not shown), the solenoid valves 10 and 8 are opened, so that the ordinary burner 2 burns, and from there the main burner L is started. Then, the main burner l burns.

In the bath, after the set time has passed or the set temperature is 1, for example, the water temperature is 4.
After reaching 2°C, the bath water filters, and in the case of a cooker or dryer, after a set time has elapsed (of course, within this set time, the main burner l is turned on by a well-known temperature regulator (not shown) provided in the circuit 6.

The temperature is kept almost constant by being turned off repeatedly. ) The food is cooked or the clothes are dried.

At this time, the switches 7 and 14 are turned off, so the solenoid valve 3 is closed and combustion in the main burner 1 is stopped.

On the other hand, the switch 14 of the solenoid valve lO is turned off, but since the selection switch 15 in parallel with it is turned on, the ordinary burner 2 continues to burn without being closed. If a delay device (not shown) is installed in the circuit 6, the gas supply to the main burner may be delayed even if the switches 17 and 18 are turned on simultaneously.

Next, when it is desired to stop combustion of the timer cut or thermocut inner shrine large burner 2, the selection switch 15 is turned off using the selection knob 16. Then, as in the case described above, the timer 8 or the temperature sensing device 9 is used to set the time or temperature, and when the switches 17 and 18 are turned on, the main burner 1 and the regular burner 2 are ignited. After the set time has elapsed or the set temperature has been reached, the switch 7 is turned off, so the solenoid valve 3 is closed and the main burner l stops burning. On the other hand, the switch 14 is also turned off, and since the selection switch 15 parallel to it is previously turned off, the solenoid valve 10 is also turned off, and the combustion of the ordinary burner 2 is also stopped.

Figure 4 shows another example, which is basically the same as the previous example, but here thermocouples 2o and 22 are used as the power source, and solenoid valves 21 and 23 which are attracted and held by these are used. It was provided in the gas channels 4 and 11. The same numbers as in FIG. 7 indicate the same members. In this example, the selection switch 15 is turned on in advance using the selection knob 16 when the burner 2 is desired to continue burning even after the timer cut or thermo cut. Next, when timer 8 or temperature sensing device 9 is set for time or temperature, switches 7 and 14 are turned on. In the normal state, the solenoid valves 21 and 23 are not opened, and the solenoid valve 23 is opened first.
For example, if you open the valve by pressing, the gas will flow to ordinary burner 2.
Since the fuel is sent to the fuel cell, it is ignited and burned by the ignition operation.

An electromotive force is generated from the thermocouple 22 due to combustion in the ordinary burner 2, and even if the pressing operation of the solenoid valve 28 is released, the valve is kept open. Next, when the electromagnetic valve 21 is opened in the same manner and gas is sent to the main burner 1, the gas is ignited from the regular burner 2 and combusted in the main burner 1. As a result, an electromotive force is generated from the thermocouple 20, and the solenoid valve 21 is held by suction. After the set time has elapsed or the set temperature has been reached, the switches 7 and 14 are turned off, the solenoid valve 21 is closed, and combustion in the main burner L is stopped, but the 1 selection switch 15 is on, so the solenoid valve 28 is not closed. The permanent burner 2 continues to burn.

Next, after the timer cut or the thermo cut, when the ordinary burner 2 also wants to stop combustion, the selection switch 15 is turned off using the 9 selection knob 16. According to this, the switches 7 and 14 are turned off after the set time has elapsed or after the set temperature has been reached, so the solenoid valves 21 and 28 are closed and combustion in the main burner 1 and the regular burner 2 is stopped. Since this example uses a thermocouple, no external power source is required, and it can also be used as a misfire safety device in case the fire is extinguished by wind or the like.

As explained above, in the present invention, when performing timer cut or thermocut of the main burner and the constant fire burner, it is possible to select both the main burner and the constant fire burner, or only the main burner, so it is possible to select between the main burner and the constant fire burner, or only the main burner. A regular burner that continues to burn even after thermocutting, or a permanent burner.

It also has the following advantages compared to those that cannot be selected because they either stop combustion or not.

a) For example, when using a hair dryer only once and not continuously, by turning off the selection switch 15 with the 1 selection knob 16, the large burner will also be turned off and you will not forget to turn off the permanent burner. Since there is no need to keep warm, ordinary people can turn it off.

If there is a large amount of clothing, etc., and two or three consecutive operations are required, turn on the selection switch 15 with the 1 selection knob 16.The ordinary burner will continue to burn even after the timer cut, and from the second time onwards, Just supply gas to the main burner, there is no need to relight it. At the time of the final operation, the selection switch 15 is turned off as described above, and the ordinary burner is also extinguished.

b) Even when using a cooking device such as a gas toaster, the above-mentioned method can be used depending on whether the bread needs to be burned once or twice or more in a row.

C) In the bath, if you want to continue burning the ordinary burner after timer cut or thermo cut and leave it for heat insulation (
(Especially in winter) or when the ordinary burner has stopped burning and no further heating is required (Especially in summer).

d) As a cooking device, for example, in an oven, it is possible to select depending on the food to be cooked whether it is desired to continue burning the constant fire burner for heat preservation even after the cooking is finished or if heat preservation is not required.

[Brief explanation of drawings]

1 and 2 are block diagrams schematically showing a conventional combustion control device, FIG. 8 is a block diagram schematically showing a combustion control device of the present invention, and FIG. 4 is a block diagram of another example. be. l...Main burner 2...Never-burner 8...Timer 9...Temperature sensing device 15...Selection switch Patent applicant Rinnai Corporation company

Claims (1)

[Claims] A combustion control device that performs a timer cut or a thermo cut of a main burner and a constant flame burner that ignites the main burner, the combustion control device selectively controlling the combustion of either both the main burner and the constant flame burner, or only the main burner. A combustion control device characterized by: