JPH0596746U - Oil burning equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain an oil combustion device that does not burn abnormally even if ignition is delayed. A pot-type burner 1, a fuel pump 2, a blower 3, an ignition heater 5 for igniting liquid fuel, a frame rod 4, a predetermined time (T) after the start of operation of the blower 3 and the ignition heater 5. Even if the ignition is delayed inside, it is determined that the ignition is missed when the fuel supply amount by the fuel pump supply means 2 into the burner 1 is reduced and ignited by deciding the presence or absence of flame while the time elapses after the ignition operation. Since the oil combustion apparatus is constituted by the control means 10 for displaying the abnormality and stopping the fuel pump 2, the blower 3, and the ignition heater 5, the fuel accumulated in the burner 1 at the time of ignition is smaller than in the conventional case, and therefore there is no excess fuel. Without ignition, proper combustion is performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to ignition control of an oil combustion apparatus equipped with a pot burner that burns liquid fuel.

[0002]

[Prior Art]

 Conventionally, the ignition control of an oil combustion device equipped with a pot-type burner energizes an ignition heater to heat the burner while blowing air to the burner with a blower, and after a predetermined preheating time has passed, the burner uses a fuel pump to supply a predetermined fuel. It supplied the supply and ignited the fuel. If a flame detection means such as a flame rod that detects the flame of the burner detects a flame until a certain time passes after that, the ignition control is continued thereafter. On the other hand, if the flame of the burner could not be detected, then the fuel supply to the burner was stopped, an error was displayed and operation was stopped.

[0003]

[Problems to be solved by the device]

 In the above ignition control of the oil combustion device, when the flame of the burner cannot be detected due to, for example, ignition delay, fuel is supplied to the burner for a predetermined time after that, and an oil pool is generated in the burner. If ignition occurs in this state, there is a problem that proper combustion will not be performed due to excess fuel and abnormal combustion will occur and the burner will be damaged.

[0004]

[Means for Solving the Problems]

The present invention has been made in order to solve the above problems, and a pot type burner, a fuel supply means for supplying liquid fuel to the burner, a blowing means for supplying combustion air to the burner, and a liquid fuel Ignition means for igniting, flame detection means for detecting the presence or absence of flame in the burner, and fuel supply means at a _first predetermined time (t ₁ ) within a predetermined time (T) after the operation of the blower means and the ignition means. When the first fuel supply amount (V ₁ ) is supplied to the burner and the second predetermined time (t ₂ ) elapses and the flame detection means does not detect flame, fuel is supplied while continuing flame detection. in addition to reducing the first fuel supply amount of the ignition operation to open and controls the means Hajimeji a (V ₁₎ to a second fuel supply amount (V _2), reduction in the second fuel supply amount (V ₂₎ the third predetermined time after (t ₃₎ flame test until the time has elapsed If the means does not detect the flame, the fuel supply amount is reduced and the flame is repeatedly detected. As a result, if the flame detecting means detects the flame within the predetermined time (T), the ignition operation by the ignition means is completed and the time point is reached. The fuel supply amount is maintained until a predetermined time (T) elapses, and then the combustion process is started. On the other hand, when the flame detection means does not detect the flame within the predetermined time (T), the fuel supply means, the blowing means and the ignition are performed. The oil combustion device is configured by the control means that operates so as to stop the operation of the means.

[0005]

[Action]

 During ignition control of the above oil combustion device, even if ignition is delayed, the control means determines the amount of fuel supply by the fuel supply means into the burner with the lapse of time after ignition operation while determining whether or not there is a flame. Therefore, the amount of fuel stored in the burner at the time of ignition is less than in the past, so there is no excess fuel and proper combustion is performed after ignition.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3.

A is a main body of the oil combustion apparatus, and 1 is a pot-type burner, which is installed in the main body A. Reference numeral 2 is a fuel pump, which communicates with the bottom of the burner 1 via an oil feed pipe 2a for supplying fuel. A blower 3 supplies combustion air to the burner 1 and communicates with the burner 1 via an air passage 3a. Reference numeral 4 denotes a frame rod for detecting the flame of the burner 1, which is attached at a proper position where the flame of the burner 1 is formed. An ignition heater 5 is attached to the bottom of the burner 1 to ignite the fuel. 6 is a fuel pump control circuit, which is connected to the fuel pump 2. The blower control circuit 7 is connected to the blower 3. A flame detection circuit 8 is connected to the frame rod 4. An ignition heater energizing circuit 9 is connected to the ignition heater 5.

Reference numeral 10 denotes a control means (hereinafter referred to as a microcomputer) including a microcomputer having a timer function, which is connected in parallel with the fuel pump control circuit 6, the blower control circuit 7, the flame detection circuit 8 and the ignition heater energization circuit 9 for combustion control. is doing.

Next, the operation of this embodiment will be described with reference to FIGS.

First, when the oil combustion apparatus is operated, the blower 3 is operated according to a command from the microcomputer 10, and at the same time, the ignition heater 5 is energized to heat the burner 1 to the ignition temperature (S1). After the ignition operation is started, the fuel pump 2 is used for the first predetermined time (t ₁ = 3 minutes) within the predetermined time (T, for example, 5 minutes) until the transition to the pre-combustion (the initial weak combustion leading to normal combustion). The first fuel supply amount (V ₁ = regular amount) is supplied to the burner 1 (S 2). The microcomputer 10 determines whether the flame is detected by the flame rod 4 before the second predetermined time (t ₂ = 3.5 minutes) elapses (S3), and if YES, the first until the predetermined time (T) Fuel supply amount (V ₁ ) is maintained, and if NO, flame detection is continued and the fuel pump 2 is controlled to set the first fuel supply amount (V ₁ ) at the start of the ignition operation to the second fuel supply amount. (V ₂ ) (S4). The microcomputer 10 determines whether the flame has been detected by the flame rod 4 by the time the third predetermined time (t ₃ = 4 minutes) elapses (S 5), and if YES, the second time until the predetermined time (T) Fuel supply amount (V ₂ ) is maintained, and if NO, the fuel pump 2 is controlled while continuing flame detection and the second fuel supply amount (V ₂ ) at the start of the ignition operation is set to the third fuel supply amount. It is reduced to (V ₃₎ (S6). The microcomputer 10 determines whether the flame has been detected by the flame rod 4 by the time the fourth predetermined time (t ₄ = 4.5 minutes) has elapsed (S7). If YES, the predetermined time (T = 5 minutes). The third fuel supply amount (V ₃ ) is maintained until (S8), and after the predetermined time (T = 5 minutes), the pre-combustion is started (S10).

If NO, the microcomputer 10 determines whether the flame pump 4 has detected flame until the predetermined time (T) by stopping the fuel pump 2 while maintaining flame detection and maintaining the fuel supply amount at zero (S9). If YES, the pre-combustion (for example, weak combustion for 3 minutes) is performed after the predetermined time (T), and then the normal combustion is performed (S10). If the result is NO, the microcomputer 10 judges that the ignition is wrong, and an abnormality is displayed on a display lamp (not shown) or the like, and the blower 3 and the ignition heater 5 are stopped (S11).

Therefore, during ignition control, even if ignition is delayed, the microcomputer 10 reduces the fuel supply amount by the fuel pump 2 into the burner 1 with the lapse of time after the ignition operation while determining the presence or absence of flame. At the time of ignition, the amount of fuel accumulated in the burner 1 is less than in the conventional case, so that there is no excess fuel, and after ignition, proper combustion is performed without standing flame combustion.

[0013]

[Effect of the device]

 According to the present invention, during ignition control of the oil combustion apparatus, even if ignition is delayed, the microcomputer reduces the fuel supply amount to the burner with the passage of time after the ignition operation while determining whether there is a flame or not. Therefore, the amount of fuel accumulated in the burner at the time of ignition is smaller than in the conventional case, and there is no excess fuel, and after combustion, proper combustion is performed without standing flame combustion.

Therefore, it is possible to provide a safe and durable petroleum combustion apparatus that does not cause abnormal combustion and does not damage the burner.

[Brief description of drawings]

FIG. 1 is an electrical system diagram of an oil burning device showing an embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between time and fuel supply amount of an oil combustion apparatus according to an embodiment of the present invention.

FIG. 3 is a flowchart of ignition control of an oil burning device showing an embodiment of the present invention.

[Explanation of symbols]

 1 burner 2 fuel pump 3 blower 4 frame rod 5 ignition heater 10 control means

Claims (1)

[Scope of utility model registration request] 1. A pot burner (1) for burning liquid fuel, fuel supply means (2, 6) for supplying liquid fuel to the burner (1), and combustion air for supplying to the burner (1). Blowing means (3, 7) for activating, and ignition means (5, 9) for igniting the liquid fuel supplied to the burner (1),
Within a predetermined time (T) after the start of the operation of the flame detecting means (4, 8) for detecting the presence or absence of the flame of the burner (1), and the blowing means (3, 7) and the ignition means (5, 9). Until the second predetermined time (t ₂ ) elapses by supplying the first fuel supply amount (V ₁ ) to the burner (1) by the fuel supply means (2) at the first predetermined time (t ₁ ). If the flame detection means (4, 8) does not detect flame at the time point of, the fuel supply means (2, 6) is controlled while continuing flame detection to control the first fuel supply amount at the start of the ignition operation ( in addition, the until the time the second fuel supply amount (V ₂₎ the third predetermined time after reduction to (t ₃₎ has elapsed flame to reduce V ₁₎ to a second fuel supply amount (V ₂₎ When the detecting means (4, 8) does not detect the flame, the fuel supply amount is reduced and the flame is repeatedly detected, and as a result, the predetermined amount is obtained. The flame detecting means (4 in between (T),
When 8) detects a flame, the ignition operation by the ignition means (5, 9) is completed, the fuel supply amount at that time is maintained until the predetermined time (T) elapses, and the subsequent combustion process is started, On the other hand, when the flame detection means (4, 8) does not detect a flame within the predetermined time (T), the fuel supply means (2), the blower means (3, 7) and the ignition means (5, 9). And a control means (10) that operates to stop the operation of the oil combustion apparatus.