JPS6248768B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a liquid fuel control device interposed in a fuel supply path of a combustor that burns kerosene. In order to balance the amount of fuel supplied and the amount of air blown from the blower, the blowing pressure from the blower is applied to the upper surface of the liquid chamber of the liquid volume regulator, thus overflowing from the riser pipe communicating with the liquid chamber and combustion. What is fed to the vessel is known.

However, this type of liquid volume regulator needs to be equipped with a riser pipe to prevent the liquid fuel from flowing toward the combustor even when the combustor is installed at an angle, and the fuel rises inside this riser pipe. It is necessary to apply sufficient air pressure to the top of the liquid chamber.

For example, when the head difference between the riser pipe and the liquid level is 4 mm, the excess air ratio is as shown in FIG. 4, and in areas where wind pressure is low, the amount of fuel pushed out by this is extremely small compared to the amount of air. In other words, the excess air ratio at which normal combustion occurs (A in the case of a pot-type oil combustor)
The air ratio becomes extremely large compared to the part shown in Figure 2), making it difficult to achieve normal combustion.

Therefore, as is clear from FIG. 4, conventionally this type of control could only be used in a large combustion region (a region where the air amount and fuel supply amount are large).

The purpose of the present invention is to obtain a control device that enables such control even in a small combustion area. It is equipped with a liquid volume regulator consisting of an airtight liquid chamber that keeps the liquid level constant at all times, and a riser pipe that communicates with the liquid chamber and has an overflow port at a position H higher than the liquid level in the liquid chamber. In a device in which liquid fuel is sent out by applying wind pressure from a blower to the upper surface of the chamber, the duct connecting the combustor and the blower is provided with a damper that automatically opens when the pressure exceeds a set pressure. , the upper surface of the liquid chamber is communicated with the blower via a passage branching from the front side of the damper.

An example of implementing the present invention will be explained with reference to the attached drawings.

A liquid combustor 2 that burns by forced ventilation from a blower 1 has an airtight liquid chamber 4 in which the liquid level is kept constant at all times, and an airtight liquid chamber 4 that communicates with the liquid chamber 4.
A liquid volume regulator 7 consisting of a riser pipe 6 with an overflow port 5 is provided at a position H higher than the liquid level of Therefore, in a device configured to send out liquid fuel, a damper 9 that automatically opens when the pressure exceeds a set pressure is provided in the duct 8 that connects the combustor 2 and the blower 1, and a passage 10 that branches off from before the damper 9 is provided. The upper surface of the liquid chamber is communicated with the blower 1 via.

The illustrated liquid chamber 4 has an inflow valve 11 interlocked with a float 12 to control opening and closing to maintain a constant liquid level.

Reference numeral 13 denotes a second liquid chamber provided surrounding the riser pipe 6. The liquid chamber 13 is communicated with the combustion pot 2a via a connecting pipe 14, and the upper surface of the liquid chamber 13 is connected to the combustion pot 2a. It communicates with the surrounding air chamber 2b, and the upper surface of the liquid chamber 13 is kept at the same static pressure as the static pressure of the air chamber 2b.

In the drawings, reference numeral 15 indicates a suction amount adjusting damper provided at the suction port 1a of the blower 1.

The illustrated damper 9 may be closed by a weight 9a as shown in FIGS. 1 and 2, or may be opened when a pressure that overcomes the gravity of the weight 9a is applied to the damper 9, or it may be opened as shown in FIG. As shown in the figure, the damper 9 closes due to its own weight, and the pressure that overcomes its own weight causes the damper 9 to close.
It may be configured to open when working on the bottom surface of the. When doing so, the pressure in front of the damper 9, that is, the liquid chamber 4
A relationship of P ₁ > P ₂ occurs between the pressure P ₁ acting on the upper surface of the liquid chamber 13 and the pressure P ₂ acting on the second liquid chamber 13,
Since a large pressure can be applied to the upper surface at the same time as the blower 1 is operating, and the wind pressure can be controlled by the damper 9, the amount of air supplied to the combustion 2 can be reduced, thereby allowing small combustion. A proper mixing state can be maintained even in a region (region where the air volume and fuel supply amount are low).

As described above, according to the present invention, a damper that automatically opens when the pressure exceeds a set pressure is provided in the duct connecting the combustor and the blower, and the upper surface of the liquid chamber is communicated with the blower via a duct branched from in front of the damper. Therefore, the damper can increase the static pressure on the upper surface of the liquid chamber and reduce the wind pressure on the combustor side.In other words, the amount of air blown can be reduced and the air supplied to the combustor side can be reduced. This has the effect of maintaining an appropriate mixture ratio even in a region where the quantity and fuel are low, making it possible to control combustion in this region.

[Brief explanation of the drawing]

The drawings show one example of the implementation of the present invention; FIG. 1 is a cutaway side view, FIG. 2 is an enlarged side view of a part thereof,
Fig. 3 is a diagram corresponding to Fig. 2 of another embodiment, and Fig. 4 is a diagram corresponding to Fig. 2 of another embodiment.
The figure is a characteristic curve diagram. 1... Blower, 2... Liquid combustor, 3... Oil supply path, 4
...liquid chamber, 5...overflow port, 6...rise pipe.

Claims (1)

[Claims] 1. In the oil supply path of a liquid combustor that burns by forced ventilation from a blower, there is an airtight liquid chamber that keeps the liquid level constant at all times, and an airtight liquid chamber that communicates with the liquid chamber so that the liquid level in the liquid chamber is higher than the liquid level.
It is equipped with a liquid volume regulator consisting of a riser pipe with an overflow port at a higher position, and is configured to apply wind pressure from a blower to the upper surface of the liquid chamber and send out liquid fuel by the wind pressure. In the combustor, a damper that automatically opens when the pressure exceeds a set pressure is provided in the duct connecting the combustor and the blower, and the upper surface of the liquid chamber is communicated with the blower through a passage branching from before the damper. liquid fuel control device.