JPH0129422Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combustion control device based on the amount of remaining kerosene in an oil hot air heater.

Traditionally, oil hot air heaters use lights or buzzers to remind people around them of the need to refuel when the amount of kerosene used for combustion decreases to below a certain level.
There was also a system that controlled the operation to be stopped if the refueling operation was not performed after a certain period of time had elapsed. This will be explained with reference to FIG. In Figure 1, 1 is an oil pan for combustion, and 2 is an oil pan 1.
A float switch 3 detects the amount of kerosene remaining in the oil pan 1, and is a float for the float switch 2, which moves to follow the oil level in the oil pan 1. 4 is a lead wire of the float switch 2, and when the remaining amount of kerosene is above a certain amount, the terminals of the lead wire 4 are short-circuited, and when it is below a certain amount, the terminals of the lead wire 4 are open. 5 is a kerosene cartridge tank, and 6 is an oil pipe that sends oil from the oil receiving tray 1 to the combustion machine. And, if there is enough kerosene, the operation will be from the cartridge tank 5 to the oil receiving tray 1.
Kerosene is supplied to and the kerosene oil level is at position 7,
The terminals of the lead wire 4 of the float switch 2 are short-circuited. As the kerosene gradually decreases, the kerosene in the cartridge tank 5 runs out and the supply stops, so the kerosene in the oil pan 1 decreases and the kerosene level 7
It descends in 8 directions. When the voltage drops to level 8, the terminals of the lead wire 4 of the float switch 2, which had been shorted until then, are opened. In response to the signal, the control device prompts the necessity of refueling with a lamp, a buzzer, etc., then performs normal combustion for a certain period of time T, and then stops combustion after the certain period of time T has elapsed. At this time, it is better that at least a small amount of kerosene remains in the oil pan 1. This is because during normal combustion, if there is no kerosene at all, combustion becomes unstable. Therefore, in general, when stopping, the oil level needs to be kept at level 9, which is slightly above the upper end of the oil pipe 6. In other words, the amount of kerosene that can be consumed within a certain period of time T is determined by the internal volume of the oil pan from level 8 to level 9, V, and the amount of strong combustion, which has the disadvantage that there is too much leeway in the case of weak combustion. .

The present invention was made to overcome the above-mentioned drawbacks, and its purpose is to obtain a combustion control device that lengthens a certain period of time in the case of weak combustion to maintain an appropriate amount of remaining kerosene, and the purpose is to provide a combustion control device that maintains an appropriate amount of remaining kerosene by lengthening a certain period of time in the case of weak combustion. This system not only prompts the necessity of refueling when the engine is hot, but also configures a timer whose time-up time is inversely proportional to the weighted average of the combustion amount, and lengthens the notice time T in the case of weak operation.

An embodiment of the present invention will be described with reference to FIG. 10 is a commercial power source, both ends of which are connected to the full load 13 of the warm air heater via a normally open contact 11a of a relay 11, which will be described later, and the relay 11
The relay 12, which will be described later, is connected via the normally open contact 11a of the
Strong/weak combustion switching load 1 via the normally open side contact 12a of
4 and further connected to the transformer 15.
When the relay contact 11a is on, the combustion is in progress, and when the relay contact 11a is off, the combustion is stopped.
When relay contact 12a is on, strong combustion occurs.
When it is off, there is weak combustion. transformer 15
The secondary side of is connected to the DC power supply circuit 16. The DC power supply circuit 16 supplies DC power for the control circuit of this circuit. 17 is a kerosene remaining amount detection circuit;
A kerosene float switch 2 is connected to its input via a lead wire 4. Kerosene remaining amount detection circuit 17
The output 18 of is connected to a transistor 20 via a resistor 19.
connected to the base of The collector output of transistor 20 is connected to drive a buzzer 21 and an indicator lamp 22. Furthermore, the kerosene remaining amount detection circuit 17
The output 24 of is connected to an electronic timer circuit 26. The electronic timer circuit 26 is the combustion amount switching circuit 23
When the float switch 2 is turned off, a time-up occurs in inverse proportion to the weighted average of the combustion amount, and an "L" output is output. (When the float switch 2 is turned off, charging is performed using a capacitor charging timer method, for example, with a low resistance when it is strong and a high resistance when it is weak.) Electronic timer circuit 2
The output 25 of 6 is input to the kerosene remaining amount detection circuit 17. Another output 27 of the electronic timer circuit 26 is also connected via a resistor 28 to the base of a transistor 29. The collector of transistor 29 is connected to drive relay 11. The output 30 of the combustion amount switching circuit 23 is connected to the transistor 3 via a resistor 31.
Connected to the base of 2. The collector output of transistor 32 is connected to drive relay 12.

Next, the operation of one embodiment of the present invention will be described.
When the remaining amount of kerosene in the oil pan 1 is above level 8, the terminal of the lead wire 4 of the float switch 2 is in a short-circuited state, and at that time, the kerosene remaining amount detection circuit 1
The output 18 of 7 is "L", so the transistor 20 is off, and the buzzer 21 and indicator lamp 22 remain off. Furthermore, since "L" is also input to the combustion amount switching circuit 23, the strength is determined depending on the room temperature condition and the operation is performed. Next, when the oil level falls below level 8, the terminal of the float switch 2 becomes open, and at that time the output 18 of the kerosene remaining amount detection circuit 17 becomes "H". Therefore, the transistor 20 is turned on, and the buzzer 21 and indicator lamp 22 are also turned on. This alerts those around you to the need for refueling. Further, "H" is also input to the electronic timer circuit 26, which causes it to operate. In the case of strong combustion, since the combustion amount switching circuit 23 outputs an "H" output, the electronic timer circuit 23 times out quickly. In the case of weak combustion, since the combustion amount switching circuit 23 outputs an "L" output, the electronic timer circuit times out at a slow time. The time-up time is determined by the ratio of strong/weak combustion time. In other words, the time period is inversely proportional to the weighted average of the combustion amount. For example, in the timer system of the capacitor charging method, in the case of strong combustion, the capacitor is charged with a low resistance, and in the case of weak combustion, it is charged with a high resistance, so that the time-up is faster in the case of strong combustion and slower in the case of weak combustion. In the case of strong/weak combustion, the time is up in inverse proportion to the average of the ratio of strong/weak time. "L" is output to the output 27 of the electronic timer circuit 26, the transistor 29 is turned off, and the relay 11 is also turned off, so that the entire load 13 of the hot air heater becomes de-energized, and the combustion state is in the stop mode. become. At the same time, the electronic timer circuit 26
Since another output 25 is inputted to the kerosene remaining amount detection circuit 17, the refueling warning buzzer 2 can be activated as needed.
1 and the indicator lamp 22 can also be stopped.

As described above, according to the present invention, the need for refueling is prompted when the remaining amount of kerosene drops below a certain level in the oil pan, and the warning time is lengthened in the case of weak combustion. becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a portion for detecting the remaining amount of kerosene used in the prior art and the present invention, and FIG. 2 is a schematic electrical configuration diagram of a control device according to an embodiment of the present invention. 1...kerosene saucer, 2...float switch,
5... Cartridge tank, 13... Full load of hot air heater, 14... Strong/weak combustion switching load, 17...
Kerosene remaining amount detection circuit, 26...electronic timer circuit,
23... Combustion amount switching circuit.

Claims (1)

[Scope of utility model registration request] In a combustion control device for an oil hot air heater equipped with a cartridge tank and an oil pan, a kerosene float switch 2 installed in the oil pan 1 reduces the amount of kerosene in the oil pan 1 until the remaining amount reaches an arbitrary constant level. 8 or less, inputs the kerosene shortage signal to the kerosene remaining amount detection circuit 17, inputs its output to the electronic timer circuit 26, and inputs the output of the combustion amount switching circuit 23 to the electronic timer circuit 26. At the same time, the output is inputted to the kerosene remaining amount detection circuit 17, the output of the kerosene remaining amount detection circuit 17 is connected and inputted to the notification devices 21 and 22, and the electronic timer circuit 2
6 and the output of the combustion amount switching circuit 23, the full load 13 and the strong/weak combustion switching load 14 are controlled, and the time is inversely proportional to the weighted average of the combustion amount to automatically extinguish the kerosene. When the level falls below a certain level 8, the notification device 21,
22, a combustion control device characterized in that it prompts the necessity of refueling.