JPH0345012Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention is a cleaning device for oil fan heaters and other vaporization type combustors.

<Prior art> Conventionally, in combustors that use liquid fuels such as petroleum, the vaporizer may malfunction if used for a long time, not only if the fuel is bad or the combustion equipment is not good, but even if the fuel is of good quality and the combustion equipment is good. Tar adheres to the inside of the nozzle and the inside of the nozzle, making it difficult for gas to pass through and reducing the vaporization efficiency of liquid fuel, causing incomplete combustion.To remove the tar,
First, suck up the remaining fuel in the fuel tank using a suction device while checking the condition of the float, and after confirming that there is no more fuel in the tank, heat the carburetor heater with electricity, and then restart the fuel pump. The tar was heated and combusted over a certain period of time by supplying air (oxygen) into the vaporizer by operating it under no load.

<Problems that the invention aims to solve> However, conventionally, as mentioned above, this work had to be carried out after completely removing the fuel in the fuel tank, and this work was usually troublesome, and most In many cases, the combustor is used without sufficient cleaning, resulting in lower vaporization efficiency, gas passage obstruction, and increased generation of harmful gases.

Therefore, the present invention provides a combustor which eliminates such troublesome use and enables reliable cleaning with simple operation.

<Means for solving the problem> The present invention includes means for detecting the presence or absence of fuel, means for determining and confirming whether combustion is possible, and a heater and a fuel pump for heating the carburetor.

<Example> Hereinafter, the present invention will be explained in detail with reference to an example shown in the drawings.A heater 4 for heating the vaporization element 2 is installed on the side of the carburetor 1 in which the vaporization element 2 is housed in the internal combustion passage. Further, a temperature sensor 3 is attached to the vaporizer 1 to detect how much the vaporization element 2 is heated by the heater 4,
One side of the carburetor 1 is communicated with a nozzle 5 facing a combustion burner 15, and a cleaning rod 6 operated by a solenoid 7 is freely fitted and disposed opposite the nozzle to form a cleaning device 8.

The other end of the carburetor 1 is connected to an electromagnetic pump 10 via an oil supply pipe 9, and the oil in the fuel tank 13 is pumped into the vaporizer 1 through the suction pipe 12 of the electromagnetic pump 10.
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The fuel tank 13 is provided with a float 14 that monitors the increase and decrease of fuel, and various information from the float 14, electromagnetic pump 10, heater 4, temperature sensor 3, etc. is processed by the microcomputer 11. I try to control each.

The series of operations will be described below using the time chart shown in FIG. 5. First, in the normal combustion state, the inside of the vaporizer 1 is heated to a temperature of about 270° C. by the heater 4. Then, the temperature sensor 3 detects that the temperature is a value at which the fuel actually vaporizes, and after reading this into the microcomputer 11, the electromagnetic pump 10 is driven to supply fuel into the vaporizer 1. The gas vaporized by the vaporizing element 2 in the vaporizer 1 is sent into the burner 15 through the nozzle 5, and the ignition device is energized to operate the convection blower simultaneously with the ignition _C1 to sustain combustion. .

Changes in the fuel due to combustion are monitored electrically by vertical movement of the float 14 as shown in Figure 3, and as combustion continues, the float 14 eventually changes as shown in Figure 4. As the liquid level drops and reaches the liquid level A beyond the liquid level B, the suction pipe 12 is cut off from the liquid level A, and replenishment of fuel becomes impossible.

Therefore, an electromagnetic pump is used to blow air, but in the end, vaporized gas cannot be generated and a misfire _E1 occurs.
Therefore, in order to confirm that the fuel in the tank is running out, the heater 4 is energized again, and at the same time, the electromagnetic pump 10
Try ignition C ₂ to see if fuel can be supplied by operating the engine, and confirm that it is a misfire E ₂ .
Then, the above-mentioned ignition operation _C3 is performed once again, and when it is determined that the result is a misfire _E3 , the cleaning operation is started.

That is, in the cleaning operation, first, the nozzle 5 of the vaporizer is closed, and at the same time, the heater 4 is energized.
The temperature is controlled so that the cleaning temperature is 400°C to 460°C, and after a certain period of time, the electromagnetic pump 10 is energized to send air into the vaporizer 1. The temperature inside the vaporizer 1 is higher than the temperature when vaporizing the fuel. The tar adhering to the vaporizer due to heating is immediately burned off by combustion after receiving oxygen supplementation, and can be discharged as ash to the outside of the vaporizer.

If fuel is accidentally refilled into the tank during the above cleaning operation, the fuel will be pumped into the carburetor 1 and vaporized and combusted, so this may happen unexpectedly. To avoid this, when fuel is refilled during cleaning operation and the float's limit switch is turned "ON," the cleaning operation is immediately stopped according to the processing procedure loaded into the microcomputer. .

<Effects of the invention> Since the invention is configured as described above,
Cleaning can be performed when fuel supply to the tank is stopped and fuel cannot be sucked up from inside the tank.

Therefore, unlike in the past, where the fuel in the tank was completely removed and then the cleaning operation was carried out manually, the cleaning process is now easier and more thorough than ever, as it is simply set on a microcomputer. It is easy to maintain, prevents the generation of harmful gases due to incomplete combustion, and is an ideal idea that can be used to create a comfortable environment.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the device of the present invention, Fig. 2 is a cutaway side view of the main parts of the same device, Figs.
The figures are side views showing different operating states of the fuel tanks used in the same device, and FIG. 5 is a diagram showing a time chart of the present invention. 1... Carburizer, 3... Temperature sensor, 4... Heater, 10... Electromagnetic pump, 11... Microcomputer, 13... Fuel tank, 14... Float.

Claims (1)

[Scope of utility model registration request] means for detecting the presence or absence of fuel in the fuel tank;
It consists of a means for determining the condition of the fuel and confirming that it cannot be supplied to the vaporizer, a heater for heating the vaporizer, and a pump for sending fuel or air to the vaporizer. At the point when suction becomes impossible, the heater is energized and the pump is operated to send oxygen, so that the tar deposited in the vaporizer is burnt out under computer program control. Cleaning device for vaporizing combustor.