JPH0424297Y2 - - Google Patents

Description

[Detailed explanation of the idea]

<Technical Field> The present invention relates to a combustor for an oil combustor. <Prior art> Conventionally, in a general combustor that burns fuel using a burner, etc., in order to maintain the amount of primary air supplied, that is, the primary air air-fuel ratio, at a certain constant value, for example, a valve is installed in the blower pipe that supplies air. In Bunsen type combustors, a damper is installed in the air passage near the gas nozzle and the primary air supply amount is adjusted by opening and closing the damper. ing. However, at present, the primary air supply amount is adjusted relatively large during the combustor manufacturing process for visual confirmation or at the time of adjustment by general users, and the primary air supply amount varies. As a result, the ignition performance becomes unstable, or flames stand or fly in the early stages of ignition, causing anxiety for the user.In indoor exhaust type combustors such as oil fan heaters, the oxygen This has caused various problems such as unstable concentration. <Purpose> Therefore, in view of the above-mentioned drawbacks, the present invention aims to provide a combustor that can easily and accurately adjust the primary air-air-fuel ratio and prevent variations in the primary air-air-fuel ratio. <Example> Hereinafter, an example of the combustor of the present invention will be described based on FIGS. 1 to 3. FIG. 1 is an electric circuit diagram of a control circuit of a combustor according to the present invention, FIG. 2 is a front view showing the installed state of the alarm, and FIG. 3 is a side view of the burner air adjustment means. As shown in FIGS. 1, 2, and 3, the present invention includes a burner 1 for burning vaporized fuel, a damper as an air amount adjusting means 2 for adjusting the amount of primary air supplied to the burner 1, and a damper as an air amount adjusting means 2 for adjusting the amount of primary air supplied to the burner 1. A flame rod serving as a flame detection sensor 3 which is placed close to the flame detection sensor 3 and whose electric signal value (resistance value) changes depending on the combustion state; an ignition device 4 integrally formed with the flame detection sensor 3; A nozzle 5 that spouts vaporized fuel downward, a carburetor 6 integrally formed with the nozzle 5, and five LEDs 7 as an air amount adjustment indicator A that notifies the amount of primary air supplied to the burner 1.
8, 9, 10, 11, and a control circuit M for controlling the alarm A. The control circuit M also includes a setting device 12 for setting an electric signal value corresponding to a change in the primary air supply amount.
is provided, and the control circuit M includes the setting device 12.
compares the electric signal value from the flame detection sensor 3 with the electric signal value of the flame detection sensor 3, and outputs a notification signal to the alarm A when the electric signal value of the flame detection sensor 3 reaches the set electric signal value. It is equipped with an alarm control function. The flame detection sensor 3 includes a parallel connection body of a first resistance R1 and a second resistance R2, a third resistance R3 connected in series to the parallel connection body, and either the first resistance R1 or the second resistance R2. Connected to the power supply via the first switch SW1, which can be switched freely on one side,
It is connected to ground via a fourth resistor R4. A voltage dividing point between the parallel connection body and the third resistor R3 is connected to the input side of the control circuit M. Further, a second switch SW2 is provided for switching the control circuit M to the ventilation level in conjunction with the first switch SW1, and a fifth resistor R5 is connected to the ground side of the second switch SW2. A voltage dividing point between the five resistors R5 and the ground is connected to the input side of the control circuit M. That is, in this embodiment, switches SW1 and SW2 are used as switching means for switching the detection level of the flame detection sensor 3 between the primary air supply amount adjustment level and the ventilation level for detecting ventilation timing, combustion amount, etc. Based on this switching signal, the control circuit M switches its circuit sequence into ventilation mode or primary air supply adjustment mode. Furthermore, the setting device 12 is connected to the input side of the control circuit M. Further, the output side of the control circuit M is connected to the alarm A.
The five LEDs 7 to 11 are connected to an automatic fire extinguishing device 15 that automatically stops the fuel supply, and each of the LEDs 7 to 11 is connected to a resistor 7a.
~ connected to control circuit M via resistor 11a. The LEDs 7 to 11 are arranged in a line on the front of the combustor main body. Note that the control circuit M is a general one-chip microcomputer, and has internal ROM, data RAM, ALU, etc.
It is driven by a reference clock oscillator. The control circuit M has a function of outputting a lighting signal to the alarm A when the flame level signal of the flame detection sensor 3 becomes 0.3 MΩ or more compared to the output signal from the setting device 12. It is being In the above configuration, when the user presses the ignition switch of the combustor, the damper as the air amount adjusting means 2 is opened, vaporized fuel is ejected from the nozzle 5, and the ignition device 4 is operated to ignite. At this time, the second switch SW2 is in the ON state, so the first switch SW1 is connected to the second resistor R2, and the control circuit M receives the electric signal value from the setting device 12 and the electric signal from the flame detection sensor 3. Compare the signal value and if the electric signal value of flame detection sensor 3 is higher than the set electric signal value (resistance value 0.3MΩ), alarm A will be activated.
A lighting signal is output to LED7 to LED11. For example, as shown in Table 1, if the electric signal value (resistance value) from the flame detection sensor 3 is 0.3, the LED 7 is lit, and if it is 0.4, the LED 7 and the LED 8 are lit. Below, as the resistance value increases sequentially, LED7~
11 is turned on, and finally, if the electric signal value is 0.9, all LEDs 7 to 11 are turned on. Also, if the electrical signal value of flame detection sensor 3 is less than the set electrical signal value (0.3MΩ), alarm A will be activated.
Do not output lighting signals to LEDs 7 to 11. In addition,
Table 1 shows the relationship between the amount of supplied air (primary air air-fuel ratio) and the resistance value of the flame detection sensor 3 at a certain combustion rate of 3300 kcal/h.

[Table] Therefore, since a service person or the like can adjust the amount of primary air supply while observing the number of lights on the alarm A, the state of the flame can be adjusted easily and reliably. Further, when the alarm A is used in a manufacturing process, a service process, etc., the first switch SW1 is connected to the second resistor R2. In other words, the second switch
When SW2 is closed, the primary air supply amount is displayed.
When the second switch SW2 is opened, the first switch
SW1 is connected to the first resistor R1. As a result, the circuit sequence is configured to display the ventilation level, combustion amount, etc. from the primary air supply amount adjustment level. Note that the first resistor R1 and the second resistor R2 are set to have different resistance values, and the first resistor R1 is 0.8MΩ~
When the first switch SW1 is connected to the 6.8MΩ side, the frame resistance in the normal range can be read accurately (ventilation level). Also, when the second resistor R2 side is connected to 0.1MΩ to 2MΩ, the configuration is such that the supply air amount (primary air air-fuel ratio) can be read accurately (primary air supply amount adjustment level). It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention. For example, the alarm A is not limited to the use of LEDs, and the combustor is not limited to the wick elevating type or the Bunsen type. <Effects> As is clear from the above description, the present invention includes a burner that burns fuel, an air amount adjusting means that adjusts the amount of primary air supplied to the burner, and an air amount adjusting means that is arranged close to the burner and responds to the combustion state. a flame detection sensor whose electrical signal value changes when A setting device is provided to set an electrical signal value corresponding to changes in the air supply amount, and the detection level of the flame detection sensor is adjusted to the primary air supply amount adjustment level, and the ventilation control for detecting ventilation timing, combustion amount, etc. A switching means is provided for switching between levels, and the control circuit includes means for comparing an electrical signal value from the setting device with an electrical signal value of the flame detection sensor, and a switching means for switching between the flame detection sensor and the flame detection sensor as a result of the comparison by the comparison means. and an alarm control means for outputting an alarm signal to the alarm when the electrical signal value reaches the set electrical signal value. Therefore, according to the present invention, a serviceman or user can check the flame state while looking at the alarm, that is,
Since the supply amount of the primary air can be adjusted, the primary air air-fuel ratio can be easily and accurately adjusted, and there are excellent effects such as being able to prevent variations in the primary air air-fuel ratio. In addition, since a single flame detection sensor can adjust the primary air supply amount and determine the ventilation level, the parts used for both detections can be shared, which has the advantage of reducing the number of parts. There is.

[Brief explanation of the drawing]

Fig. 1 is an electric circuit diagram mainly showing the control circuit of the combustor of the present invention, Fig. 2 is a front view showing the installed state of the alarm, and Fig. 3 is a side view of the burner and air adjustment means. It is. 1...Burner, 2...Air amount adjustment means, 3...
Flame detection sensor, 4... ignition device, 5... nozzle, 6... vaporizer, 7, 8, 9, 10, 11...
LED, 12...setting device, 15...automatic fire extinguishing system,
A... Alarm, M... Control circuit, R1... First resistor, R2... Second resistor, R3... Third resistor, R4
...Fourth resistor, R5...Fifth resistor, SW1...First switch, SW2...Second switch.

Claims (1)

[Claims for Utility Model Registration] A burner that burns fuel, an air amount adjusting means that adjusts the amount of primary air supplied to the burner, and an electric signal value that is arranged close to the burner and changes depending on the combustion state. A flame detection sensor, an air amount adjustment alarm that notifies the amount of primary air supplied to the burner, and a control circuit that controls the alarm, and the control circuit has a control circuit that responds to changes in the amount of primary air supplied to the burner. A setting device is provided for setting the electrical signal value, and a switching means is provided for switching the detection level of the flame detection sensor between a primary air supply amount adjustment level and a ventilation level for detecting ventilation timing, combustion amount, etc. and the control circuit includes: means for comparing an electric signal value from the setting device with an electric signal value of the flame detection sensor; and as a result of the comparison by the comparison means, the electric signal value of the flame detection sensor is equal to the setting. A combustor comprising: an alarm control means for outputting an alarm signal to the alarm when an electric signal value is reached.