JP2733895B2 - Combustor air volume control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air volume control device for a combustor in which exhaust gas from a plurality of combustors is exhausted to the outside through a common exhaust pipe.

[0002]

2. Description of the Related Art A plurality of combustors provided with control means for switching between a fuel supply amount and an associated blower amount are provided, and the exhaust of these combustors is exhausted to outside through a common exhaust pipe. Things are known.

[0003]

However, in the case of exhausting to the outside through a common exhaust pipe, one exhaust affects the other exhaust, and the balance between the fuel amount and the air amount is lost, so that the optimum combustion is performed. Is not obtained. For this reason, for example, Japanese Patent Laid-Open Publication No. 64-38516 has previously proposed an apparatus in which two supply cylinders are connected to each other by a connecting pipe for connecting the two supply cylinders so as to prevent the influence of exhaust gas on the other side as much as possible.
However, in this case, since a part of the air with the higher air pressure flows to the other side, the amount of the air with the higher air pressure is reduced, which is disadvantageous. Further, there is also known an apparatus in which a predetermined air volume is obtained for each combustor by feedback control, but this apparatus not only requires an air volume sensor for each combustor, but also requires complicated control means. There is a problem such as becoming. An object of the present invention is to obtain a combustor air volume control device free of such a problem.

[0004]

In order to achieve the above object, the present invention comprises a plurality of combustors provided with control means for switching between a fuel supply amount and an associated blower amount. A multi-dimensional data matrix map of a rotational speed of a blower or a correction coefficient corresponding to the rotational speed of the blower determined in advance by an experiment, in which the exhaust gas is exhausted outside through a common exhaust pipe. Is provided, and the amount of air blown by the blower of each combustor is controlled according to an output signal from the storage means.

[0005]

In the air volume control device for a combustor according to the present invention, the storage means stores a rotational speed of the blower obtained in advance by experiment or a multi-dimensional data matrix map of a correction coefficient corresponding to the rotational speed of the blower, By controlling the rotation speed of the blower provided in each combustor to an optimum value by the output from the storage means, one of the exhausts affects the other exhaust without requiring a complicated correction process, and It is possible to prevent the balance of the amount of air blown from being lost.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the apparatus of the present invention will be described with reference to FIGS. 1 to 3 for a case having a combustor using liquid fuel, mainly kerosene as fuel, in the case of binary data. In the figure, A and B are combustors, 1 is a constant oil leveler provided in each of the combustors A and B, 2 is a fuel supply means, and the kerosene in the constant oil leveler 1 is pumped as the fuel supply means 2. An electromagnetic pump having an adjustable discharge capacity was provided, and the electromagnetic pump was supplied to each of the combustors A and B. Reference numeral 3 denotes a blower for supplying combustion air to each of the combustors A and B. The blower 3 is of a type capable of varying the amount of blown air. The control means 4 controls the amount of fuel supplied to the combustors A and B and the number of revolutions of the blower 3 that blows the amount of air corresponding to the amount of fuel supplied. Then, the exhaust gas from each of the combustors A and B is discharged to the outside through one common exhaust pipe 5. In the drawing, not only exhaust gas from each of the combustors A and B but also air supply is taken from a common air supply cylinder 6. In the drawing, one combustor A is used as a hot air heater for indoor heating, and the other combustor B is used for floor heating including a heat exchanger B1 connected to a floor heating panel (not shown).

As shown in FIG. 2, the control means 4 comprises a temperature setting means 7 for setting a room temperature and a floor heating panel temperature;
A temperature detecting means 8 such as a thermistor for detecting the room temperature and the floor heating panel temperature; and a discharge amount of the electromagnetic pump as the fuel supply means 2 according to a deviation between the temperature setting means 7 and the temperature detecting means 8. Combustion amount determining means 9 for determining
The discharge capacity of the electromagnetic pump 2 is adjusted by the combustion amount determining means 9. In addition, there is provided a blowing amount determining means 10 for determining the rotation speed of the blower 3 according to the amount of combustion determined by the burning amount determining means 9.

According to the present invention, the blower amount determining means 10 includes a multi-data matrix map of correction coefficients corresponding to the number of rotations of the blower 3 obtained in advance by experiments or the number of rotations of the blower 3 obtained in advance by experiments. And a multi-data matrix processing means 12 for retrieving desired data (rotational speed) from the storage means 11 in accordance with the combustion amount determining means 9. The multi-data matrix processing means 12 Rotation control circuit 13 so that the number of rotations corresponding to the input data can be obtained.
Is operated to rotate each of the blowers 3 at a predetermined rotation speed. Reference numeral 14 denotes a rotation speed detecting means for detecting the rotation speed of each blower 3, and the rotation speed of each blower 4 detected by the rotation speed detection means 14 is determined by each of the blowers detected by the rotation speed detection means 14. The rotation speed of the rotation control means 13
To control each blower 3 to rotate stably at a predetermined rotation speed. The figure shows the fuel amount determining means 9 and the rotational speed of the blower 3 determined in advance by experiment or the blower 3 determined in advance by experiment.
Air flow rate determining means 1 including storage means 11 for storing a multi-dimensional data matrix map of correction coefficients corresponding to the number of rotations
Zero and multi-dimensional data matrix processing means 12 were incorporated in cpu. FIG. 2 shows a case in which the fuel supply amount to the combustors A and B is switched to each of the five stages. Matrix data of the number of rotations of the blower 3 corresponding to the blowing amount obtained in advance by experiment is obtained. Show.

Next, the operation of the apparatus will be described with reference to the case where the matrix data map shown in FIG.

For example, the room temperature detected by the temperature detecting means 8 is lower than the temperature set by the temperature setting means 7, and the stage 3 of the fuel supply amount to the combustor A is selected.
Since the floor heating panel temperature detected by the temperature detecting means 8 is relatively higher than the temperature set in the step (b), when the stage 1 of the fuel supply amount to the combustor B is selected, each blower 3 is selected. The predetermined rotation speed, that is, 2,000 rotations in the combustor A,
In the combustor B, the blower 3 rotates at 1400 revolutions. The amount of air blown by the number of rotations is the number of rotations of the blower, which is determined in advance by experiments in consideration of the mutual exhaust,
That is, since the amount of air is blown in each of the combustors A and B in consideration of the influence on each other's exhaust, the amount of air supplied in each of the combustors A and B is correct according to the amount of fuel, and stable combustion is obtained.
In the above-described apparatus, the blower 3 is provided on the supply side of the combustors A and B, but may be provided on the exhaust side. Further, the above-described embodiment shows an example in which air is supplied from the outside and exhausted to the outside, but it is needless to say that the present invention can be applied to a type in which only exhaust is performed by a common exhaust cylinder. Further, as the fuel supply means 1, instead of the electromagnetic pump 2, a head-type fuel supply means for supplying fuel using a head can be used, and the head-type fuel supply means and each of the combustors A, B An electromagnetic flow control valve is provided in a passage connecting the electromagnetic flow control valve and the throttle amount of the electromagnetic flow control valve is adjusted according to the deviation between the temperature setting means 7 and the temperature detection means 8 so that the fuel amount is controlled. Is also good.
Note that the matrix data map can be multiplexed, and in that case, more complicated processing using a plurality of variables can be performed. For example, in addition to the above, in addition to the above, a matrix data map in which a change in air pressure or a change in combustion air temperature (air temperature) or the like is created and stored in the storage means 11, and a change in air pressure or combustion air temperature (air temperature) is stored. It is also possible to take into account the correction due to the change in the rotation speed of the blower. Further, it is also possible to increase the number of combustors exhausted to the exhaust stack 5.

[0011]

According to the present invention, the storage means stores a blast amount obtained in advance by experiment or a multi-dimensional data matrix map of a correction coefficient corresponding to the blast amount obtained in advance by experiment. By controlling the rotation speed of the blower provided in each combustor according to the output, it is possible to obtain the amount of air blown by each blower as determined by experiments, and easily eliminate the imbalance of the amount of air blown with the amount of fuel It is possible to always make stable combustion. Moreover, since the matrix data is directly called, no complicated arithmetic processing is required, the program itself can be simplified, and the processing speed is improved.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 shows the control means of FIG.

Fig. 3 Matrix data map

[Explanation of symbols]

2 Fuel supply means 3 Blower 4
Control means 5 Exhaust stack 11 Storage means A
Combustor B Combustor

Claims (1)

(57) [Claims] 1. A combustor comprising a plurality of combustors provided with control means for switching between a fuel supply amount and an associated blower amount, and exhausts the combustors to the outside via a common exhaust pipe. In the apparatus, the control means of the combustor is provided with a storage means for storing a rotational speed of the blower obtained in advance by experiment or a multi-data matrix map of a correction coefficient corresponding to the rotational speed of the blower, and an output from the storage means. An air volume control device for a combustor, wherein the air volume of a blower of each combustor is controlled according to a signal.