JPS58142119A - Liquid fuel combustion apparatus - Google Patents

Abstract

PURPOSE:To prevent abnormal rise in temperature in a gas vaporizing part, when a wire disconnection is detected in a thermistor for detecting the temperature in the gas vaporizing part, by stopping all operations after quenching the gas vaporizing part, by setting the opening of a damper to control the air rate for combustion at the maximum, after de-energizing the vaporizing heater. CONSTITUTION:When a thermistor 2 for detecting the temperature in a gas vaporizing part is broken in a condition that liquid fuel is vaporizing and burning, a point (a) turns OV, and input relations among comparators 9-11 are made to be Va>Vd>Vc>Vb. Accordingly, the output from an OR circuit 14 is 1 at the time when a transistor Tr20 is turned OFF, after the set time elapsed in a timer circuit 21. Then Tr19 is turned ON, and a relay 13 for controlling a vaporizing heater is made unexcited, to stop energization to the vaporizing heater. At the same time, a relay 36 for controlling a burner motor is energized, and a damper is opened at the maximum by a solenoid 44 for controlling a damper being not energized, as well as to drive the burner motor, and all operations are stopped after the set time elapsed in a timer circuit 26.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid fuel combustion apparatus, and more particularly to a safety device in the event of an abnormality such as a disconnection of a thermistor for controlling a heater.

In general, when controlling the temperature of a vaporization heater using a temperature-dependent element such as a thermistor, use Li I low range car 2 o (lG to 400°C and rod end II (1/,
I, I~, Lee Mister's 11th anti-change lW+! The value also changes from the number 1 haΩ to the value ``Yuyama Ω1''. Here, when the atmosphere Ar is 1 degree -20'C and the temperature is 1 year old, the resistance value will be 1k1MΩ, and it is possible to distinguish between a disconnected state and a normal state with one circuit.
：It is very difficult, and it is difficult to solve 1. in general circuits. Undetectable. That is, when H6 is formed on the center line only by the temperature detection circuit &j: hi surrounding n1. (When the degree t° falls below a predetermined value, a malfunction occurs in which the thermistor detects a disconnection even though it is always 11-8. Therefore, conventionally,
After turning on the operation switch.

A timer circuit is provided so that the disconnection detection circuit does not operate for a predetermined period of time.
Check whether the resistance value of the mister changes with the clay set to a detectable value. If the operation is set to PF+1, the result will be A.

in this way? , in the Y-Song composition 1. 111Iill
+,! l'4, J:ri predetermined lR to the timer circuit
71? 'll Ire the disconnection detected?
During that time, 1 island was energized for 1 night /l, J B,
: 'After 111 hours have elapsed, the disconnection is detected and the operation starts at 11.
- However, at that time, θII<temperature of the vaporization section shown in Figure 1, Part 1 is 1-C 1-shaped 1 island in Ta'C. Next, when the alarm 11j1 road is reset and the operation is started, the timer circuit is temporarily reset to 1'1, so it is turned off from the initial stage of the angle, and the predetermined 11, then f'+1t.
l It takes electricity to vaporize it overnight. Vaporization part 4111 degrees l:
From Ta0c (7) Star 1-NoA, Tb0C4 makes 1 Nishi.

If the temperature is repeated ten times over the course of history, the temperature of the vaporizing section will be 1.11 at Tr; 0G. 9 (is.

As shown in 1-1 above, in the conventional configuration, when the servo star for detecting the degree of vaporization part is disconnected, if the reset is repeated, the degree of state and 6. Ru,.

In order to solve the problem of the present invention, this J2 Una Question) t'1/Kimono-When the C1 disconnection detection is activated, the command operation is immediately performed P+'1.;\-(g/), so - first, the vaporization heater \'s [city tram k f+' IL,
1-, then open the durbar for combustion air blade adjustment and set it to 11J, and set the burner motor only to 19I.
The temperature of the vaporizer is rapidly and sufficiently cooled after operating for 11 hours.
1. Repeat the steps 1 and 1, but the l1ui of the vaporizing section
1 loaf &-, ro l + j common name - t place - without dissolution, etc.: in a dangerous state 7I-1) no n! It is. [7] At this time, the damper for combustion 1";'7 air: 11 adjustment is opened to collect debris. '4. It has the characteristics of a trade.

For example, let's talk about Ll in Figures 1 and 2.

Figure 1 shows the I/R configuration, and the disconnection detection circuit is activated.
Immediately, the alarm circuit shuts off all circuits ;), Q, 1-5
/ This case is shown below, and its operation is explained as -
When the dirt switch is turned on, the thermistor is disconnected, so the jetter starts energizing. The disconnection detection circuits Q and J are activated for a predetermined time t1 after the above-mentioned watering switch is turned on (because there is no operation, the vaporization section continues to flow 11 times for one vaporization section, and is turned off after t1).

. Switching Ta0C-, 4 makes 1-eye I゛. At this point /i
: Since the circuit operation stops, naturally the disconnection is not detected.
+II+01 state. ? Kashinarishi〕i
When I rotate the car, the 11 degree disconnection undetected timer works 1
．． The temperature of the vaporizing section continues to rise from Ta0C for t1 and becomes Tb0C.If the above operation is repeated, Vaporization part 1kA I Elephant 1'' Abnormally 1-Stomach 1-1 Repeated several times, the state of Group 1 coating was reached as described above.

Figure 2 d shows the change in the vaporizer #ul of 2nL when the same operation as described above is performed according to the present invention. Similarly, the operation is 11) (For clarity, after turning on the switch, tiI+
``11 kl', the disconnection detection circuit is not activated by the disconnection detection timer and the vaporization section temperature is 1-rl by turning on the vaporization overnight. 3. At t1 j174, the disconnection detection circuit is activated and first the vaporization heater is turned on. is turned off. During combustion, the combustion is stopped.Then, the burner is driven, and air is blown to the combustion section, which is opened at a predetermined time, to cool the vaporization section n111 degrees.Then, the alarm circuit is turned off. When the opening of the dashiper is small, the temperature of the vaporizing section changes as shown by the broken line, and the temperature of the vaporizing section...
After re-energizing, the voltage decreases only to t1V
] (Then, the damper is opened at the same time as the burner motor is driven. If the damper is set to the maximum value, the cooling effect of the vaporizer part during t2191 can be increased. After that, the damper is opened at the same time as the burner motor is driven.Nu All circuits d(j; disconnected. Next, reseno lL
Even when the engine is operated at a mountain, the temperature of the vaporizing section is sufficiently low, so that when the mountain is energized, the temperature rise is Tb, so there is almost no problem. .

A first embodiment of the present invention will be described below based on the electric circuit shown in FIG.

1 is the illumination for the control circuit, 2 is the vaporization/1. ．． 1 degree detection l-1
1-U-Mister, 3-8 are resistors. 9-111:J
, ] ] 11 Comparison -C1 Comparison with the set level of the vaporization section temperature detection circuit's ('Asu):; S Comparison with the setting level of the detection circuit and output the legal -4-1312 is the drive circuit, 13fr;1 :vaporization” - evening fl
II L-114 for il1mil is an OR circuit,
f-th 1, constitute the logical sum of the outputs of the once detection circuit 9 and the disconnection detection circuit 11 (5.

16 is a diode, 16 is a resistor, 17r1 is a logic circuit,
Reference numeral 18 is a diode, and the famous parts 15 to 18 constitute a room temperature thermo-off lock circuit during breathing. 1
9.20 is a transistor, and a 21-digit timer circuit operates the disconnection detection circuit 11 for a predetermined period of time after turning on the switch.
Well, it's a timer that lasts 1 minute.

22 iqJ: II (, anti, 23,241J condenser, time setting i41 month., 25 iI 1-
Lanozister, 26 is a tie-1 circuit, disconnection detection circuit 1
This is a timer that turns on the burner motor for a predetermined period of time after one operation.

27 LJ, I (: anti, 28 i, 'lconau')"
Nosa, 29 is an OR circuit, 30η transistor, 3
1 is the senor of the one-winding notch relay = :+il,
32ij, -''The alarm circuit is composed of parts 29 to 32 with the reset coil of the 1-winding latch relay. 33
, 34 is 1 drive circuit, 36 d゛ room the ball circuit, 36
is a relay, parts sweater production +1711-(j3
, 37 is a transistor, 38Q-j combustion control (1 circuit,
39i17i cantering circuit, 4o is a relay for combustion 1111 carving 11 - (゛A Zl + 141 &-, 1st tune - 2nd winding Kunochiri relay - 31, 32 contacts, set coil 31 1 sonomagnetic normally open, It becomes normally closed by excitation of the reset coil 32. □ is the a 2 ij return switch. 44 is a trenoid that sets the damper 11 old part to the maximum, and 46 sets the combustion to strong (1 fill ff1
11 circuit 38 outputs the strong combustion 1-position reno, it is sent to the solenoid 44 through the drive circuit 43. Relay 46 is turned off.

In the device 1'j having the configuration as described above, the operation will be explained first.
If limiter 2 is in the iF normal state,
[When the temperature of relay mister 2 is below the disconnection detection level 3,) j',, Il-.

The human power relationship for Software 9-11 is v, <Vdgu■. <Vb
and 4:su, the valley output is ratio 1 bite 9 is ○1 sho, 11 koki 10
is 1, and 11 is 1. The output of the twist/breakage detection circuit is in the ON state, but the tie-no circuit 21
Since the output e of is 1, 1-lasisister 20 or ON l.

This '1 keeps the output of the disconnection detection circuit at O. - Comparison of heater open side 1 river 'IS
Output 19 of r 10 (':J: Turns on the r drive circuit 12
1. Excite the heater control σfil relay 13 and start the vaporizing heater at JITI71°C4-1,j-.

At the same time, a signal IJ of 1 is sent to the OR circuit 17, and a signal of 1 is sent to the OR circuit 17.
(13'J: 1 in the room heating up more than I")
11-11 degree detection circuit) 36 is turned off. After vaporization, the width of the 2nd part of the vaporizer was 1/2 energized,
When Va) Vd, the output of the comparator 11 becomes O.Firstly, when the voltage becomes Vd, the output of the comparator 11 becomes O. T-1: ・j' After the time determined by the sensor 23 has elapsed, the output of the timer circuit 21 becomes 0.
．． When the transistor 20 is in the OFF state, 1. However, the OR circuit 14 I:I: output remains 0, and the timer circuit 2
6's Rihinoto l'Mi rg is O and the output f is 1. The transistor 26 is turned on and the alarm circuit is turned off. Lock 12, +E always continues operation.

When the current is applied to the vaporization for a while, the temperature of the vaporization section becomes ]-Va)Vc, and the output of the ratio 'l''141o becomes 0. As a result, the drive circuit 12 is turned off, and the relay 13
becomes non-magnetic and stops energizing the vaporization heater. At the same time, the OR circuit 17 is set to the O state, and the chamber f1. ．． The OFF lock of the thermo circuit 36 is released. Here, if the room temperature thermo circuit 36 is in the ON state, the drive circuit 34 is turned on, the 7th relay 36 is energized, the burner motor is turned on, and at the same time a signal is supplied to the combustion control circuit 38, and the drive circuit 39 is turned on in a predetermined sequence. It turns on, energizes the first relay 40, and shifts to the combustion state. This is an explanation of how JSoi- works when it is on a streetcar.

Next, an explanation will be given of the operation when the thermistor 2 for detecting degrees y and 'a of the vaporization section is disconnected. When the wire is disconnected, point a is ov0.
b , '8th, ro, 1 Since this relationship continues, there is 1\C of the output k11 of ILl connection 11, and the setting time of Taino circuit 21 is red i17:) The great output je is o, 1, Rashi/' 7
．． 920 is OFF and “” “person, 1” -71M
'Neutralizing circuit 14 &: I: Output 1. c: hl/ goes up twice, transistor 19 goes up OJ=, drive circuit 12 goes up
FF, Relay 13 (+-man 1 Gutsutsukisha and 11, Ki 11
'□IJ-n,'ll'l ``lljroρ1'・
Market. Same 11! ) to IM dynamic circuit 33%-ON・1
1. Hi, Il Ni 111, relay 36 to Iib (i drum, barzu Tanabata 4.- ON;~1j ro 1. zo, so to speak, I-tsuno/solid 37 ON (+(, lri) Combustion is caused by MC.In addition, a signal lj is supplied to the reset end Fg in the timer circuit 26 L21'J·l:, = +-start 'J', 4pl.

jfjy resistance 27, = horn j-on'') -28-C constant 4+111j question I':''6, ill, the output f becomes 0 and the transistor 26 is turned off. This 1
1, it becomes the state of ii rational sum circuit 29Q1.1, and 1
- Lanogister 30 is ON 1. ,,, , Shitada!
-t nona - Talley's Seno] - The coil 31 is a 1σ horn (1 sand,
Once the detection thermistor 2 is disconnected, C[:, after the timer circuit 21 or tights.

While the timer circuit 26 times up, the burner motor is turned on and the solenoid 44 is turned off to cool the vaporizing section. Next, turn the return switch 42 ON, and pass it through the reset coil 32 711. When the contact point 42 is turned to the closed side, Yamaga repeats the same operation as described above and opens the vaporizer heater by +13. Since the vaporizer is cooled, the -2゜cooker remains overnight in the refrigerator. Even when the power is turned on, the dll (dll) becomes abnormally unstable, and the power is cut off after a predetermined period of time.

Next, if the ``re'' mister 2 is 1 bit and the d and 4 degrees of the vaporization part are abnormally spiky due to nJ or other reasons, va>
vb.

Next, the output of the device 9 becomes 1, and the 1-OR circuit 14
1 state 1. Then, after cooling the vaporization section in the same way as when the wire is disconnected, the operation of all circuits is restarted.

As described above, according to the present invention, the y-
Not always, after an abnormality is detected, only the burner motor is operated in the damper 1j old 1 state for a predetermined period of time, and after cooling the vaporizing section, the entire circuit V month 1+! +Create? Therefore, even if the 1111 degree reset is repeated 1-, there will be no peak I where the temperature of the vaporizing section rises abnormally, and the damper will remain fully open for a while. The cooling effect is also extremely high.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the temperature of the vaporizing section in the conventional example, Fig. 2 is a diagram showing the temperature of the evaporating part in the practical example of the RI failure invention, and Fig. 3 is the electrical circuit diagram of the same.・Thermistor, 44...-Solenoid (
for dampers). Name of agent Masu Rishio Nakao Masao and 1 other person
-5μ Sorry? 1 (1)

Claims (1)

[Claims] a combustion chamber having air and heat for vaporizing liquid fuel;
It is equipped with a burner motor that sends combustion air into the combustion chamber, a damper that adjusts the amount of air supplied by the burner motor, and at least one thermistor for detecting temperature, which is connected to the vaporization heater. However, in the event of an abnormality such as disconnection of the temperature detection thermistor or @condensation radiation,
A liquid fuel combustion device configured to stop energizing the heater, operate the burner motor, set the opening amount of the damper to the maximum position, and activate an alarm circuit after a predetermined period of abnormality detection has elapsed. .