JPH07217871A - Ignition device for pot-type kerosene burning device - Google Patents

Abstract

PURPOSE:To remarkably shorten the ignition time of a pot-type kerosene burning device(having an exhaust tube, at a cold district. CONSTITUTION:In a pot-type kerosene burning device equipped with an igniting device, in which fuel, controlled by an oil amount control means 6, and combustion air, whose amount is balanced with the flow rate of the fuel, are supplied to a pot 3 and the fuel is sent to the pot 3 with a predetermined flow rate upon ignition to burn it while a burning unit is heated by the combustion upon ignition, the device is constituted so that the amount of air, which is larger than the amount of air balanced with the flow rate of fuel upon ignition, is supplied upon ignition while the amount of air, smaller than that upon ignition, is supplied when a higher room temperature is detected whereby a constant ignition time is obtained regardless of the room temperature.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition device for a pot type petroleum combustor which uses an exhaust stack to reduce the ignition time from ignition operation to steady combustion.

[0002]

2. Description of the Related Art A conventional pot type oil combustor starts oil combustion by manually setting an oil amount control means composed of an oil amount controller etc. to an ignition position and increasing the fuel flow rate. The combustion air blowing rate is also set to increase at the same time.

Instead of such a manual operation, a room temperature setting means and a temperature sensor for room temperature detection are attached to the oil combustor,
There is known a structure in which the fuel flow rate and the combustion air amount are varied by the signal of the temperature detector to maintain the room temperature at a set temperature. The relationship between the fuel and the air amount is determined to be the one that maximizes the combustion efficiency, and even when the flow rate dedicated to ignition is flown during the ignition operation, the optimum air amount similar to that during steady combustion is blown. .

[0004]

During the ignition operation, the temperature of the pot and the combustion part is lower than that in the steady combustion, and until the temperature of each part becomes almost the same as the temperature during the steady combustion, the weak combustion or the strong combustion occurs. It is not possible to switch to combustion.

Normally, weak combustion, which has a slightly smaller combustion amount than medium combustion, which can be expected to have stable combustion even at low temperatures, is set as the ignition combustion amount. However, since the combustion amount is small, each part reaches the steady combustion temperature. It takes a long time to get started, and it does not switch to strong combustion immediately in a cold morning. In the conventional detection of the end of the ignition time by detecting the temperature rise of the combustion part, the ignition time at room temperature of -20 ° C may be 30 minutes or more, which is extremely high. It's inconvenient.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an air passage 2 to which combustion air is supplied by a blower 1 for combustion, and a plurality of stages of air attached to the air passage 2 on a side wall. A pot 3 having a hole 3a formed therein, a heat exchange chamber 5 connected to an exhaust pipe 4 provided above the pot 3, and a fuel pipe 7 for supplying fuel to the pot 3 via an oil amount control means 6 are provided. The combustion blower 1 and the oil amount control means 6 are energized during ignition operation in a pot type oil combustor in which the air and fuel flow rates are varied according to the signal from the temperature detector 8 for detecting room temperature and the set value of the room temperature setting means 9. The ignition heater 10 is set in the pot 3, and the oil amount control means 6 fixes the fuel flow rate supplied to the pot 3 to a weak flow rate during the period from the ignition operation to the steady combustion. The flow rate of fuel supplied to the pot 3 The amount of air blown is set to be lower than the amount of air blown at a low temperature when the temperature detector 8 for detecting the room temperature detects a certain temperature or higher, while supplying a larger amount of air than the amount of air blown. Is.

[0007]

In the pot type oil combustor, the fuel supplied to the bottom surface of the pot 3 is vaporized by the combustion heat and mixed with the air to burn. Therefore, the optimum combustion flame position exists at each fuel flow rate. However, the air and fuel are supplied in a well-balanced manner so that they always burn optimally.

In the present invention, when the temperature of the bottom surface of the pot 3 is not sufficiently warmed immediately after ignition, a larger amount of air than the amount of air determined according to the fuel flow rate is sent for combustion. On the other hand, due to the excessive supply of air, the combustion is completed earlier than planned, and the combustion flame is formed at a position lower than that in the conventional combustion. Naturally, the combustion state is deteriorated and the amount of incompletely combusted gas is increased. However, in this type of pot type oil combustor, the air is exhausted to the outside by the exhaust pipe 4, so that the indoor air is not polluted.

Further, the fact that the combustion is completed earlier than expected means that the position of the combustion flame is low and the combustion flame is in the pot 3
The temperature of the pot 3 increased rapidly as it approached the bottom surface, and steady combustion could be achieved in a short time.

Since the demand for shortening the time from ignition to steady combustion is mainly for cold regions, the present invention provides a temperature detector 8 for detecting room temperature in consideration of use in warm regions. When detecting a temperature above a certain temperature, the air flow rate is changed to a low air flow rate, and when the room temperature does not drop too much, such as re-ignition in a warm room or ignition in a warm area, approaching optimum combustion. Since the generation of incomplete combustion gas is reduced and the number of revolutions of the combustion blower 1 is reduced, the usage of the sound is quiet.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the embodiments shown in the drawings. 1 is a combustion blower for supplying combustion air, 2 is an air passage to which combustion air is supplied, and 3 is a pot attached to the air passage 2. A plurality of multi-stage air holes 3a are formed on the side wall of the pot 2, and the combustion air sent to the air passage 2 is sent into the pot 3 from the air holes 3a.

Reference numeral 11 is a combustion chamber continuous with the pot 3, 5 is a heat exchange chamber communicating with the upper side of the combustion chamber 11, and 4 is an exhaust pipe attached to the heat exchange chamber 5. The wall of the combustion chamber 11 is a heat-resistant glass cylinder. The red heat tube 11a is suspended from the top plate of the heat exchange chamber 5. Therefore, the red heat tube 11a is red-heated by the combustion heat, and the heat ray generated from the red heat tube 11a passes through the wall of the combustion chamber 11 formed of the heat-resistant glass tube and radiates the heat to the surroundings.

Reference numeral 12 is a reflector located at the back and sides of the combustion chamber 11, and 13 is a convection fan attached to the back of the reflector 12. The heat rays emitted from the red heat tube 11a are forwarded by the reflector 12. The indoor air is radiated and passes through the vicinity of the heat exchange chamber 5 by the convection fan 13 to become warm air and is discharged forward.

6 is an oil amount control means for supplying fuel from an unillustrated oil tank, 7 is a fuel pipe connecting the oil amount control means 6 and the pot 3, and 10 is an ignition heater looking into the pot 3. The fuel amount in the oil tank is controlled by the oil amount control means 6 and is sent into the pot 3 through the fuel pipe 7, and the ignition heater 10 starts ignition and combustion.

Reference numeral 8 is a temperature detector attached to the frame of the oil combustor for detecting the room temperature, and 9 is room temperature setting means provided in the operating portion of the oil combustor. The operator operates the room temperature setting means 9. You can set the desired room temperature. The combustion blower 1 and the oil amount control means 6 are the burner controller 1
The required fuel flow rate and combustion air amount are determined from the room temperature set by the function of 4 and the signal of the temperature detector 8, and the room temperature is maintained at the set temperature. The burner controller 14 always supplies the fuel flow rate and the air amount corresponding to the fuel flow rate in good balance to burn the oil combustor in the optimum state.

By the way, in the pot type oil combustor using the burner controller 14 having a function of simultaneously changing the fuel flow rate and the air amount, when the ignition SW 15 is pushed, the burner controller 14a causes the temperature detector 8 and the room temperature detecting means 9 to operate. The operation is stopped and the combustion blower 1 and the oil amount control means 6 are set to the weak combustion suitable for ignition during the ignition time.

In the ignition operation, the fuel sent to the low temperature pot 3 starts ignition combustion by the ignition heater 10,
By continuing the combustion at the time of ignition, the temperature of the combustion part such as the pot 3 is raised, and after the ignition time has elapsed, the fuel flow rate and the air amount are changed by the signals of the temperature detector 8 and the room temperature setting means 9. A steady combustion that changes in a well-balanced manner starts. Incidentally, during steady combustion, the maximum combustion amount is also manually set in advance by the operating portion of the oil combustor.

When the fuel flow rate during ignition operation is high, it seems that the ignition time until the start of steady combustion can be shortened. However, if the fuel flow rate is increased, the pot 3 is at a low temperature and an oil pool is generated. And it becomes abnormal combustion.
The present invention is directed to an ignition control unit 14 that receives a signal from an ignition SW 15.
The operation a is different from the conventional one.

That is, during the ignition time, the oil amount control means 6 causes the fuel to flow at a weak flow rate, and at the time of low temperature, the combustion blower 1
Supplies a larger amount of air to the pot 3 than the air amount corresponding to this weak flow rate. Therefore, the fuel is supplied with a large amount of air to complete the combustion with a short flame, and the temperature of the bottom surface of the pot 3 rises in a short time to shorten the ignition time. However, since the balance between the fuel flow rate and the air amount is lost, the incomplete combustion gas is increasing, and the exhaust stack 4 is required. Moreover, since the combustion blower 1 operates at high speed, the noise value increases.

Further, according to the present invention, the output signal of the temperature detector 8 is also connected to the ignition operation section 14a, and when the room temperature during the ignition operation is at a certain temperature or higher, the blown air quantity is lower than the air quantity at the low temperature. The setting is changed to. Generally, the ignition time is long when the room temperature is low, and when the room temperature is high, it is possible to shift to the steady combustion in a short time. In many cases, the ignition time is within the allowable range of the operator when the room temperature is high. Therefore, by increasing the ignition time while approaching the combustion state to stable combustion, rather than taking measures to reduce the combustion balance and shorten the ignition time when the room temperature is high, even if it is cold, the ignition time is the same as when it is warm. Even when the end of ignition is detected by the temperature rise of the combustion part, the ignition time can be ended in a short time of about the same length.

Further, since the ignition time is almost constant, it is possible not only to detect the temperature rise in the conventional combustion section to end the ignition time but also to forcibly end the ignition time by a timer operation. The ignition time, which may take 30 minutes or more in the past, can be ended with a fixed time of 6 to 8 minutes which is always preset by the timer.

[0022]

As described above, according to the present invention, although the blowing noise of the combustion blower becomes high during the ignition operation in the cold morning,
It becomes possible to start steady combustion in a shorter time than before, and after steady combustion, the signal from the temperature detector 8 burns a large amount of combustion to bring the room temperature close to the set temperature, which greatly improves usability. It is a thing.

Further, during a warm daytime ignition operation or an ignition operation after the room temperature rises, the blowing noise of the combustion blower 1 becomes a low and quiet operating noise, and the combustion leading to steady combustion is stabilized.

Further, in the ignition device of the present invention, the time for switching from the ignition operation to the steady combustion in which the combustion amount becomes large becomes almost the same even in the cold morning or in the daytime, and the oil combustor is always operated with the same feeling without worrying about the ignition time. It can be operated.

[Brief description of drawings]

FIG. 1 is a sectional view of an oil combustor equipped with an ignition device according to the present invention.

FIG. 2 is a block diagram showing an ignition device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion blower 2 Air path 3 Pot 3a Pot air hole 4 Exhaust pipe 5 Heat exchange chamber 6 Oil amount control means 7 Fuel pipe 8 Temperature detector 9 Room temperature setting means 10 Ignition heater

Claims (1)

[Claims] 1. An air passage 2 to which combustion air is supplied by a combustion blower 1, a pot 3 attached to the air passage 2 and having a plurality of multi-stage air holes 3a formed in its side wall, and an upper portion of the pot 3. A heat exchange chamber 5 connected to the exhaust stack 4 and a fuel pipe 7 for supplying fuel to the pot 3 via an oil amount control means 6 are provided, and the combustion blower 1 and the oil amount control means 6 detect room temperature. In the pot type oil combustor in which the air flow rate and the fuel flow rate are varied according to the signal from the temperature detector 8 and the set value of the room temperature setting means 9, the ignition heater 10 energized during the ignition operation is looked into the pot 3, and From the ignition operation to the steady combustion, the oil amount control means 6 fixes the fuel flow rate supplied to the pot 3 to a weak flow rate, and the combustion blower 1 has a larger amount than the air flow rate corresponding to the fuel flow rate supplied to the pot 3. Of room temperature is supplied. When the temperature detector 8 in use detects more than a predetermined temperature, the blown air amount than blowing amount at low temperature of the pot type oil burner, characterized in that to set the low air volume igniter.