JPS6057128A - Open-type combustion apparatus with combustion safety device - Google Patents

Abstract

PURPOSE:To eliminate a function trouble caused by a breakage of a relay driving circuit and provide a positive prevention of oxygen starvation by a method wherein a mechanism for restricting a combustion is provided when the relay driving circuit is under broken condition. CONSTITUTION:When the driving circuit 17 for the relay R is under broken condition, a mechanism 16 for restricting an igniting operation of an igniter 14 is connected in series with a timer 15, a switch S3 for turning on a transistor Tr1 and an operating switch S1 for the igniter 14 under a cooperation with the first step operation of the operating handle 4, and the mechanism is composed of a field effect transistor Tr2 which is turned on under a voltage drop through a resistor R1 and a transistor Tr3 which turns on a light emitting diode D. In case that the relay driving circuit 17 is kept broken, the light emitting diode D is not turned on and so even if the switch S3 is turned on, the capacitor C may not be charged, the field effect transistor Tr2 is not turned on, resulting in that the pilot burner 1 may not be ignited even if the switch S1 is turned on.

Description

[Detailed Description of the Invention] Unexploded LjlJ is a sentinel, open-type combustion equipment such as an instantaneous dryer that releases combustion exhaust indoors, and more specifically, a thermoelectric member heated by the combustion hole of a pilot burner. and a solenoid valve that keeps the fuel supply path to the pilot burner and main burner fully open when the electromotive force generated by the electromotive force exceeds a set value. A timer is provided to limit the duration of the combustion of The present invention relates to an open type combustion device with a combustion safety device that is interposed in series with an electrical component.

This cypress open-type combustion equipment with a combustion safety device uses a normally closed relay contact that cuts off the power from the thermoelectric member to the solenoid valve and stops combustion, so it can be used as a normally closed combustion device. It does not have the disadvantage of rapidly holding the relay in an energized state during combustion, which accelerates battery consumption.
The relay can be configured to be energized only when the timer is activated for a limited time, thereby automatically stopping combustion based on the timer activation to prevent oxygen deficiency accidents due to continuous use. It has the advantage of suppressing wear and tear as much as possible, but when using this method, it is an absolute condition that the relay is energized in order for the normally closed contact of the relay to open and combustion to stop. If the relay drive circuit is disconnected, such as due to a disconnection in the coil or an open failure in the switching transistor that fully energizes the relay based on the timer operation, the relay will not be energized even if the timer is activated, resulting in combustion It has the disadvantage that it cannot fully automatically stop, making it unable to perform its intended function of preventing oxygen deficiency accidents.

The purpose of the present invention is to eliminate all of these drawbacks. The characteristic structure of the open type combustion equipment with a fuel safety device according to the present invention, which was taken to achieve the above purpose, is that the main circuit of the 1111 relay is The point is that a mechanism is provided for regulating combustion when the wire is in a disconnected state, and the function of the present invention having such a characteristic configuration is as follows.

In other words, if there is a disconnection in the relay drive circuit, such as a disconnection in the relay coil or an oven failure in the switching transistor, combustion will be checked, so the relay WjA11
Only when the 11IllrI circuit functions normally, combustion can be made possible and the operation of the relay during combustion can be guaranteed. Therefore, the present invention can prevent malfunctions caused by disconnection of the relay drive circuit, and A friend that can achieve the effect of completely reliably achieving the function of preventing oxygen deficiency accidents during the period.

Hereinafter, an example of misfire j will be described based on the drawings.

As shown in Fig. 1, the pilot valve (which is opened and operated by the first crotch operation of the pilot burner, the main burner (2), the water heating heat exchanger (3), and the operating handle (4)) 6), Pilot gas governor +61
, comprising a main valve (7), a rice field automatic gas valve (8), and a main gas governor (9), which are opened and operated by the operation handle (4) before the second stage operation, and by the combustion flame of the pilot burner ill. Thermocouple heated +101
(This is an example of a thermoelectric member, and other examples include a thermoelectric pile and a thermoelectric generating element.) When the electromotive force generated by this thermocouple (lO) exceeds a set value, both burners il+
, (In an instantaneous water heater (an example of an open-type combustion equipment) equipped with a combustion safety circuit U:1 consisting of a fuel gas supply path (for a solenoid valve that keeps the river open) to 2+, as shown in Figure 2. The combustion control circuit is configured as follows.The solenoid valve a'a#''i is opened by the push operation before the first stage operation of the operating nozzle (4) and is in the open state. Only in this case is it possible to maintain the open position by 7% oJ.

In FIG. 2, 04 is the first stage operation of the operation...ndle (4)! 1llIJVc consecutive main 4- (S
t) (') It is an ignition igniter that is activated when energized to ON, and is used to limit the time between a firing and continuation R of 116) I/'T, IIIJ main par-7'[l, that is, When the switch (S□) linked to the operation of the rice field automatic gas valve (8) is turned on in conjunction with the ignition operation of the main burner (2), electricity is supplied and timekeeping starts, and the firewood 8 transistor is turned on until the set time elapses. (Try) k When the set time has elapsed, the transistor No. 1111 ('rr t
) is a timer that turns on the transistor (Trl), and it is a relay that excites the transistor (Trl) to turn it on. The thermocouple (1 (to)) is interposed in the thermocouple connected to the 1a column. (q and (R+) are the transistors (
Trl) is the excitation time t of the relay (R) when ON - the capacitor and resistor that set it, and (11Il is 1] 1
When the drive circuit Oη of the relay (R) is disconnected,
This is a mechanism that regulates or checks the ignition operation of the igniter A4J, and this is a mechanism that
The switch (S,) is connected in series with the activation switch (S,) of the Eve Knife H, which is activated to turn on the timer u0 gold and the transistor (TrI) k by turning it on in conjunction with the first stage operation of and an enhancement type field effect transistor (Tr g ) which is turned on due to a voltage drop due to the resistor (Rt), 1i
0N-j from ONK of iJ W transistor (Try)
a transistor (Tr s ), and a transistor (Tr s )
It is composed of a light emitting diode (D) that lights up when the LED (Tri) is turned on. (181 is the igniter I
1, timer a[9, battery for power supply of relay (R), CC') is a capacitor, (S4) is when the operating handle (4) is in the first stage operating state, When the state is switched to supplying the charge of the capacitor (C') to the nine solenoid valves, and the operation handle (4) is suddenly in a state other than the above, the capacitor (C') is charged with the battery U8i. This is a changeover switch that returns to the state where the

According to the configuration of the above-mentioned refreshing example, the changeover switch (S,) is switched by the first operation movement of the operation handle (4), and the capacitor (C charges are supplied to the solenoid valve (I21), so that the pilot burner is il+ ignites and thermocouple 1l
1) Without waiting until the electromotive force in 1) reaches the set value or more, press the rounded push of the operating handle (4) to keep the solenoid valve open.
You can cancel the operation. When the relay drive circuit l@uη is not in a disconnected state, the switch (S,) is turned ()N by the first operation of the operation handle ((), and the transistor C'r+ is turned on by the timer 0Ii). ) is turned on, the relay (R) is energized, and the combustion is easy! At the same time as the rO field is cut off, the capacitor (C) becomes extremely short (/θom
m~/I), and this condenser 7''n'v'
(By charging Cl, the 14+1 combustion safety circuit returns to the energized status after energizing the relay, and at the same time, the field effect transistor ('rr g) turns on (I N
L, the transistor ('rr3) is turned on, the light emitting diode (1)) lights up, it is displayed that the relay drive circuit l77) is normal, and the switch (Sg) is turned on by operating the control lever (4). The igniter circle is activated and the pilot burner ill is ignited. next,
By performing the second stage operation w1 of the operation nondle (4), the switch (S,) is QFFed, the ON holding of the transistor (TrI) by the timer (E) is released, and the transistors (TrI) and (Trs) are turned on. The water pressure automatic gas valve (
8) is activated and the main burner (2) is ignited, the switch (S2) is turned on, the timer 019 starts timing, and the charge in the capacitor (C) is discharged.
When the combustion duration of the main node (2) reaches the set time, the timer (c) operates for a limited time and the transistors (Th t) and (Trrs) are turned on again.
/- (R) is energized, the normally closed contact (R-b) is surrounded, the solenoid valve (Igl) is closed, and combustion is automatically stopped, preventing oxygen deficiency accidents due to long-term continuous use. On the other hand, disconnection (relay coil) or transistor (TrI), (Trs)
If the relay drive circuit (1'6) is disconnected due to an open failure, etc., the light emitting diode (D) will not light up, and this will indicate the disconnection and the operation lever (4) will be disconnected. 1st stage operation switch (S3
) Even if the crab is turned on, the capacitor (C) cannot be charged and the field effect transistor (Tr s ) is not turned on, so
Irrespective of whether the switch (S,) is ON or not, Eve Knife 0X does not ignite i1J, and pilot/(-Sfil cannot be ignited).

In the above-mentioned practical example, the ignition operation of the Eve Knife is restricted, and the combustion is restricted. However, the combustion restriction means may be a means for restricting the opening wJ of the solenoid valve IJ2) or another method. A means for cutting off the fuel supply with a solenoid valve, a means for restraining the operation of the non-operating filter, etc. may be used.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram, and FIG. 2 is a circuit diagram. (1)...Pilot burner, 11(2)...
... Thermoelectric member, (2) ... Main burner, (river ... fuel supply path, Il smell ... [magnetic valve, tl:li ... ... Combustion safety device, I51...
...Timer, (R1...Relay, (R-
b)... Regular PA contact a, OV... Drive circuit, 4... Regulation mechanism, i+<... Eve knife.

Claims (1)

[Scope of Claims] ■ When the pilot burner (thermoelectromotive member +10 heated by the combustion flame of 1+) and the electromotive force generated by it are above a set value, the power to the pilot burner +1+ and the main burner (2) is Fuel supply line (solenoid valve that keeps the river open)
In addition, a timer tea is provided to limit the combustion duration of the main burner (2), and this timer V@
A normally closed contact (R-b) of a relay (R) which is energized by battery power based on the time-limited operation is interposed in the combustion safety circuit O0 in series connection with the thermoelectromotive member t101. In open type combustion equipment with a combustion safety device, the drive times of the relay (R) w! ! (Open-type combustion equipment with a combustion safety device, which is equipped with a mechanism σ) that regulates combustion when 1'6 is suddenly disconnected.
4) An open combustion device with a combustion safety device according to claim 4, which regulates the ignition operation l1g1j.