JPS5822819A - Combustion controller - Google Patents

Abstract

PURPOSE:To prevent an igniting operation when water leakage occurs within the apparatus body and enable early discovery of water leakage by arranging at least a part of a high tension lead wire on the bottom surface of the apparatus body or in its vicinity, and lowering insulation of said part less than that of the other part. CONSTITUTION:Upon using a hot water supply heater or the like, when a drive switch is closed, an electromagnetic valve is opened, and fuel is supplied to a pilot burner (not shown). Simultaneously, a current flows through an oscillating circuit 14, and a high voltage is applied to an electrode 17 of a discharge igniter through a high tension transformer 16, thus a discharge being produced in a gap 17a and the pilot burner is ignited. Upon this occasion, when water leakage takes place in the apparatus body 19 and water is accumulated on the bottom surface 20, the current leaks and a conductive state is introduced between the conductor panel and the apparatus body 19 in a division 22 of the conductor part in which the conductor part is coated with an insulated material 21 weak in the insulating resist. Accordingly, the electrode 17 assumes a state where discharge is impossible where by occurrence of water leakage trouble can be judged.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion control device for a water heater, a hot water heater, etc.

In the conventional combustion control system, which has a high-voltage igniter and a discharge igniter electrode, water leaks inside the fuselage.
2-1 Even if the igniter is always operating, combustion can be carried out. However, the abnormal situation such as water leak failure may be noticed late and the combustion control device is installed. There are disadvantages such as making the floor of the room wet.

(70) The present invention has been made in order to avoid the above-mentioned drawbacks, and has a structure in which combustion can be prohibited by preventing ignition during combustion when a water leakage failure occurs inside the fuselage. Provide something simple.

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

(1) is the power supply, C powder is the power switch, (3) is the power transformer, (4) is the rectifier smoothing circuit, (6) is the operation switch that instructs to start, (6] is the heat exchanger cn that heats the - (8) is a solenoid valve that flows fuel to the virofft burner (not shown); (9) is an igniter; (2) is a flame detection circuit that controls ignition of the virofft burner (l!f1vg); The relay is energized and the switch 011 is switched to turn off the energization to the igniter (11).・■ll sub-control circuit, the energization is started by igniting the viroft burner and switching the switch (b). , solenoid valve G3 is opened to perform combustion.

The igniter (9), as shown in FIG. It consists of a high-voltage lead wire ■ that connects to the main compartment, and here the high-voltage lead wire + IS is as shown in Figure 3.
The middle part is disposed near the bottom of the combustion control device, and the middle part of the high-voltage lead wire ring has an insulator (2) whose dielectric strength is weaker than at least the other parts. A section (2) is provided in which the conductor portion is covered with.

With this configuration, when the power switch (2) is closed and the operation switch (5) is closed, the solenoid valve (6) opens and fuel flows through the pyro 7), and along with this, the switch +111'f! :The water pipe (7a) of the heat exchanger (7) is
), etc. Under normal conditions, when there is no water leakage,
As a result, the gap (176) of the discharge igniter electrode αη
A high-pressure discharge occurs and the pilot burner is ignited, and when the flame detection circuit (to) detects the ignition of the pilot flame, it stops energizing the oscillation circuit a4 and energizes the combustion control circuit ll instead of the oscillation circuit -. Then combustion begins.

Here, there is a water leak inside the fuselage 01, and the bottom surface -
When water accumulates in the section of the high-voltage lead wire ring,
The insulation between the conductor part of the high voltage lead wire 9 and the aircraft body (reference potential) is extremely reduced, and the high voltage is applied to the gap (171).
L) may leak in this section without discharging, or the conductor section and the fuselage a1 may become conductive, causing the secondary winding (158) of the high-voltage transformer IQ to short-circuit, making it impossible to discharge. .

If water leaks inside the fuselage as described above, ignition will not occur regardless of the operation of the operation switch (6), so this abnormal operation of the combustion control device will cause water to leak inside the fuselage. This will help you spot leaks before water spills onto the floor.

In the above embodiment, the intermediate portion of the high voltage lead wire is disposed near the bottom surface, but it may also be disposed with the outer cover in contact with the bottom surface.

High voltage lead in the above example! Some wards are under I jurisdiction.
The conductor part is covered with an insulator with weak dielectric strength as well as other parts of l@, but the high voltage lead No. By covering the conductor part in section 4 with a waterproof material,
Similarly, warping a portion of the high voltage lead wire ring with other portions of the high voltage lead wire end can also lower the insulation.

As explained above, according to the present invention, although the configuration is simple, if water leaks inside the fuselage, combustion will not start even if the ignition operation f1:t* is performed. This is extremely useful for early detection of water leaks inside the body of a water heater or the like.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a combustion control circuit diagram, Fig. 2 is a configuration diagram of an igniter, and HS diagram is a vertical cross-sectional view of the main part of the fuselage showing the wiring state of high-voltage lead wires. . (9)...Igniter, (2)-Flame detection circuit, member...
High voltage generation part, 0η...discharge igniter'fILWA,...high voltage lead wire, 0saba・2. Body, -...bottom agent Yoshihiro Morimoto

Claims (1)

[Scope of Claims] L A combustion control device including a high pressure generation section and a discharge igniter electrode connected to the high pressure generation section via a high voltage lead wire, wherein at least a portion of the high pressure lead wire is connected to the combustion control device. A combustion control device characterized in that the part of the high voltage lead wire has lower insulation than the other part of the high voltage lead wire, and is disposed on or near the bottom of the fence body. i. The combustion control device according to claim 1, wherein the high-voltage lead wire is partially uninsulated so that the conductor portion is exposed. (a) The combustion control device according to claim 1, characterized in that the high voltage lead wire is constructed by covering a conductor portion of a portion of the high voltage lead wire with an insulator having a lower dielectric strength than the other portion. 2. The combustion control device according to claim 1, wherein the high-voltage lead wire is constructed by partially covering the conductor portion with a water-permeable insulator.