JP3011223B2 - Pot type oil combustor ignition system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an igniter in a pot type oil combustor which exhausts gas using an exhaust stack, in which the ignition time from ignition operation to steady combustion is reduced.

[0002]

2. Description of the Related Art In a conventional pot-type oil combustor, combustion is started by manually setting an oil amount control means constituted by an oil amount adjuster or the like to an ignition position. Therefore, the relationship is set so that the amount of combustion air blown at the same time increases.

Instead of such manual operation, the oil combustor is provided with room temperature setting means and a temperature detector for detecting room temperature.
There is known a structure in which the flow rate of fuel and the amount of combustion air 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 so as to maximize the combustion efficiency, and the same optimal air amount is blown at the time of the ignition operation as when the steady-state combustion is performed even when the flow rate dedicated to the ignition is supplied. .

[0004]

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

[0005] Normally, the ignition amount is set to the weak combustion amount, which is slightly lower than the medium combustion amount, in which stable combustion can be expected even at a low temperature. However, since the combustion amount is small, each part has the temperature of steady combustion. It takes a long time to complete, and does not immediately switch to strong combustion on a cold morning. In the conventional method of detecting the end of the ignition time by detecting the temperature rise of the combustion section, the ignition time at a room temperature of −20 ° C. may be 30 minutes or more. Inconvenient.

[0006]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems. An air passage 2 to which combustion air is supplied by a combustion blower 1 and a plurality of air stages attached to the air passage 2 are provided 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; The combustion blower 1 and the oil amount control means 6 are energized at the time of an ignition operation in a pot-type oil combustor in which the air and fuel flow are varied by a signal of a temperature detector 8 for detecting a room temperature and a set value of a room temperature setting means 9. The ignition heater 10 is moved into the pot 3 and the oil flow control means 6 fixes the flow rate of the fuel supplied to the pot 3 to a weak flow rate from the ignition operation to the steady combustion, and the combustion blower 1 For the fuel flow supplied to pot 3, When the temperature detector 8 for detecting the room temperature detects a certain temperature or more, the amount of air to be blown is set to be smaller than the amount of air to be blown when the temperature is low. It is.

[0007]

In the pot type oil combustor, the fuel supplied to the bottom of the pot 3 is vaporized by the combustion heat, and the air is mixed and burned. Therefore, there is an optimum combustion flame position at each fuel flow rate. The air and fuel are supplied in a well-balanced manner so as to always perform optimal combustion.

According to the present invention, when the temperature of the bottom of the pot 3 is not sufficiently warmed immediately after ignition, combustion is performed by sending a larger amount of air than the amount of air determined according to the fuel flow rate. On the other hand, the combustion is completed earlier than expected due to the supply of excess air, and the combustion flame is formed at a lower position than in the conventional combustion. Naturally, the incomplete combustion gas amount increases because the combustion state is deteriorated. However, in this type of pot-type oil combustor, since the exhaust is exhausted to the outside by the exhaust pipe 4, the indoor air is not polluted.

When the combustion is completed earlier than expected, the position of the combustion flame is lowered and the combustion flame is
The temperature of the pot 3 rises faster as it approaches the bottom surface, and it is possible to shift to steady combustion in a short time.

Since such a demand for shortening the time from ignition to steady combustion is mainly a demand for a cold region, the present invention considers the use in a warm region and considers a temperature detector 8 for detecting a room temperature. When detecting a certain temperature or higher, the blowing air volume is changed to a low air volume, and when the room temperature is not so low such as re-ignition in a warm room or ignition in a warm region, the optimal combustion is approached. Since the generation of incomplete combustion gas is reduced and the number of revolutions of the combustion blower 1 is reduced, it is possible to use the sound quietly.

[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 multistage air holes 3a are formed in 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 denotes a combustion chamber connected to the pot 3, reference numeral 5 denotes a heat exchange chamber communicating with the upper side of the combustion chamber 11, reference numeral 4 denotes an exhaust pipe attached to the heat exchange chamber 5, and the wall of the combustion chamber 11 is a heat-resistant glass pipe. The glowing cylinder 11a is suspended from the top plate of the heat exchange chamber 5. For this reason, the glowing cylinder 11a glows red by the heat of combustion, and the heat rays generated from the glowing cylinder 11a pass through the wall of the combustion chamber 11 formed by the heat-resistant glass cylinder and radiate heat to the surroundings.

Reference numeral 12 denotes a reflector located at the back and side of the combustion chamber 11, reference numeral 13 denotes a convection fan mounted on the back of the reflector 12, and the heat rays radiated from the glowing cylinder 11a are directed forward by the reflector 12. The room 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 oil tank (not shown); 7 is a fuel pipe connecting the oil amount control means 6 to the pot 3; 10 is an ignition heater viewed into the pot 3 The flow rate of the fuel in the oil tank is controlled by the oil amount control means 6, sent into the pot 3 via the fuel pipe 7, and the ignition heater 10 starts ignition combustion.

Reference numeral 8 denotes a temperature detector attached to the frame of the oil combustor for detecting the room temperature. Reference numeral 9 denotes room temperature setting means provided in the operation unit of the oil combustor. The operator operates the room temperature setting means 9. To set the desired room temperature. The combustion blower 1 and the oil amount control means 6 are provided with a burner controller 1.
The required fuel flow rate and combustion air amount are determined from the room temperature set by the operation of 4 and the signal of the temperature detector 8, and the room temperature is maintained at the set temperature. The burner controller 14 burns the oil combustor in an optimum state by always supplying the fuel flow rate and the air quantity corresponding to the fuel flow rate in a well-balanced manner.

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

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 the ignition, the temperature of the combustion part such as the pot 3 is raised. After the ignition time has elapsed, the fuel flow rate and the air amount are determined by the signals of the temperature detector 8 and the room temperature setting means 9. Steady combustion, which changes at the same time in a well-balanced manner, starts. During the steady combustion, the maximum combustion amount is manually set in advance by the operation unit of the oil combustor.

When the fuel flow rate during the ignition operation is large, it is considered that the ignition time until the start of steady combustion can be shortened. However, when the fuel flow rate is increased, the pot 3 is at a low temperature, so that the oil pool is generated. And abnormal combustion occurs.
The present invention relates to an ignition control unit 14 which receives a signal from an ignition switch 15.
“a” performs an operation different from the conventional operation.

That is, during the ignition time, the oil amount control means 6 allows the fuel to flow at a low flow rate, and at low temperatures, the combustion blower 1
Supplies a larger amount of air to the pot 3 than the amount of air corresponding to the weak flow rate. For this reason, the fuel was supplied with a large amount of air and completed the combustion with a short flame, and the temperature of the bottom surface of the pot 3 rose quickly and the ignition time could be shortened. However, since the balance between the fuel flow rate and the air quantity is lost, the incomplete combustion gas is increasing, and the exhaust stack 4 is required. Further, since the combustion blower 1 operates at a 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 operating section 14a so that when the room temperature at the time of the ignition operation is equal to or higher than a certain temperature, the amount of air blown is smaller than that at the time of low temperature. To change the setting. 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, when the room temperature is high, the ignition time is within the allowable range of the operator. Therefore, rather than taking measures to shorten the ignition time until the combustion balance is disrupted when the room temperature is high, by increasing the ignition time while bringing the combustion state closer to stable combustion, the ignition time is different from that when warm even after cold. Instead, even when the end of the ignition is detected by the rise in the temperature of the combustion part, the ignition time can be ended in a short time having substantially the same length.

Further, since the ignition time becomes substantially constant, it is possible not only to end the ignition time by detecting the temperature rise of the conventional combustion section, but also to forcibly shorten the ignition time by operating a timer. In addition, the ignition time, which conventionally took 30 minutes or more, can be ended in a fixed time of 6 to 8 minutes always set in advance by a timer.

[0022]

As described above, according to the present invention, during the ignition operation on a cold morning, the blowing sound of the combustion blower becomes high,
The steady combustion can be started in a shorter time than before, and after the steady combustion, the room temperature approaches the set temperature by burning with a large amount of combustion by the signal of the temperature detector 8, so that the usability becomes very good. It is a thing.

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

Further, in the ignition device according to the present invention, the time required for switching from the ignition operation to the steady combustion in which the amount of combustion is increased even during the cold morning or during the day is almost the same, and the oil combustor always operates with the same feeling regardless of the ignition time. It can now be operated.

[Brief description of the drawings]

FIG. 1 is a sectional view of an oil combustor provided 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 tube 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)

(57) [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 multistage air holes 3a formed in a side wall, and provided on 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. The combustion blower 1 and the oil amount control means 6 detect a room temperature. In a pot-type petroleum combustor in which the air and fuel flow rates are varied according to the signal of the temperature detector 8 and the set value of the room temperature setting means 9, the ignition heater 10 that is energized during the ignition operation is looked into the pot 3, and During the period from the ignition operation to the steady combustion, the oil amount control means 6 fixes the flow rate of the fuel supplied to the pot 3 to a low flow rate, and the combustion blower 1 increases the flow rate of the air corresponding to the flow rate of the fuel supplied to the pot 3. Air at room temperature 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.