JPH03233216A - Elevation setting device for combustor - Google Patents

Abstract

PURPOSE:To make it possible for a unskilled personnel to carry out definite setting by shifting the display of an indicator from an ordinal display to an elevation setting display, and enabling elevation setting in several stages, and correcting a rotary speed of a burner fan, according to the setting elevation. CONSTITUTION:When elevation setting is carried out, attempts must be made to depress a timer switch 11 and a 'good morning' timer switch 2 simultaneously, and shift the contact for a shift means 22 and indicate the output of elevation on an digital indicator 8. Then, a further attempt is made to align an elevation value output on an indicator 8 with the elevation of equipment to be used. adjusting the output of a volume 14. Thus operation allows a burner fan motor rotary speed setting means 25 to correct and set a rotary speed based on the amount of correction output from a correction factor generation section 17. This construction makes it possible to set elevation without calling for skilled practice.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an altitude setting device for a combustor that requires adjustment of the amount of combustion air depending on the altitude.

Conventional technology In general, a decrease in air pressure at high altitudes results in a decrease in the specific gravity of the air.In particular, when combustion air is supplied by a fan motor whose rotation speed is controlled, even if the specific gravity of the air decreases due to the increase in altitude, Since the motor maintains a predetermined rotation speed, the amount of air necessary for combustion will eventually become insufficient.

Therefore, even if the combustor can handle up to an altitude of about 500 m within the allowable range of the air-fuel ratio balance of the combustor itself, there is a problem that yellow flame combustion occurs at higher altitudes due to insufficient air volume.

Conventionally, there were methods to install a damper in the combustion air intake and adjust the opening area while checking the combustion condition at high altitudes, and to adjust the amount of fuel discharge when the amount of combustion air decreased. Alternatively, a method has been used in which a pressure sensor is built into the combustion equipment itself, and the rotation speed of a fan motor that supplies combustion air is automatically adjusted according to the pressure.

Problems to be Solved by the Invention However, with the conventional method of adjusting the damper opening of the amount of combustion air while checking the combustion state, skill is required to judge the combustion state, and it is difficult to judge the combustion state while checking the flame state. The damper opening was determined based on experience. Another disadvantage is that reducing the fuel discharge amount affects the combustion amount itself, which limits the range of adjustment.

As described above, in the past, it was not possible for anyone to adjust the amount of combustion air while checking the combustion state according to the altitude. In addition, barometric pressure sensors are very expensive, which increases costs, and a cheaper and simpler setting method has been desired.

The present invention solves such conventional problems, and a seventh object thereof is to provide a device that can accurately set corrections for fluctuations in the amount of combustion air at high altitudes even without skill or experience. be.

A second objective is to provide a device that is easy to set up.

The third objective is to provide a device that has a simple configuration and can be realized at low cost.

Means for Solving the Problems In order to achieve the above-mentioned first object, the present invention provides a display unit composed of a plurality of display elements, and a display that switches the content displayed on the display unit between a normal time and an altitude setting time. and an altitude determining means, comprising a switching means and an altitude setting means for setting an altitude, and setting the value changed by the altitude setting means while checking on the display section, and correcting the rotation speed of the burner motor in accordance with the setting. This is a configuration equipped with the following.

Furthermore, in order to achieve the second objective, the altitude setting means is provided near the operation panel, and the display switching means operates by performing an operation other than the original operation on an operation switch provided on the operation panel. It is configured to receive an instruction from the display switching determination means.

In order to achieve the third objective, a damper is provided at the combustion air intake, and the area of the opening can be varied, and the scale is carved so that the opening area corresponds to the altitude.

Function The combustor altitude setting device of the present invention can set the correction amount while checking the set value due to the above configuration, and it is only necessary to be aware of the altitude value (such as checking the correction factor and combustion state, etc.) Since there is no work that requires experience or skill, anyone can set the settings accurately.This makes it easy to obtain optimal combustion conditions at any altitude.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a configuration diagram of a combustion device used to explain the present invention, and FIG. 2 shows a control block diagram of the same. 1 is the main body of the hot air heater, 2 is a fuel tank for storing kerosene, etc., 3 is an electromagnetic pump for fuel supply whose discharge amount changes according to the applied pulse frequency, and 4 is an electromagnetic pump with a predetermined rotation speed. A burner fan motor as a combustion air supply device is controlled to maintain the rotation speed, and 5 is a combustor, which mixes fuel and air sent from the electromagnetic pump 3 and the combustion air supply device 4 for combustion. 6 is the flame of the combustor. 7 is an operation panel, and on this operation panel 7 there is a digital display section 8 that serves as a 24-hour clock and a temperature display, and an LED as a mode display section.
A switch group 9, a switch group 10 for setting time and temperature control (temperature control setting), a sleep timer switch 11 for instructing combustion to be performed for one hour after the switch is pressed, and a switch group 11 for setting the current time. Obayo timer switch 12 instructs to start combustion when the time matches
and are arranged. 13 is an altitude setting means, which includes a volume 14 and an A/D converter 1 located at the corner of the operation panel 7.
3a. Reference numeral 15 denotes an altitude determination means, which is composed of an altitude display data generating section 16 that obtains the output voltage of the volume 14 and generates an altitude value, and a correction factor generating section 17 that generates a correction factor corresponding to the altitude value. . Third
The figure shows the output voltage of the volume 14, the altitude value (altitude display) output by the altitude display data generator 16, and the correction factor generator 17.
The relationship between the correction factor and the output correction factor is shown. According to the graph (a) in Fig. 3, when the output voltage of the volume 14 is lv to 4v, it corresponds to an altitude of 500 m to 2000 m.
It can be seen from graph (11) that a correction rate of 0% to 20% is generated. The correction factor generated from the correction factor generator 17 is a correction factor for the rotation speed of the burner fan motor 4,
For example, if the burner fan motor 4 is set at 200 rpm on flat ground, then at a high altitude of 2000 m, the speed will be 20%.
It is set to an amplified 2400 rpm. Reference numeral 18 denotes a display output means for outputting to the display element of the operation panel, and 19 a normal display data generation section that creates display data for normal use.For example, the digital display section 8 displays a clock and a temperature. Depending on the content, the LED group 9 for mode display turns on/extinguishes smoke. Reference numeral 20 denotes switch discrimination means for processing operation information of the switch groups 10, 11, and 12, which discriminates whether to set the time, set temperature, sleep timer instruction, good morning timer instruction, etc. 2
Reference numeral 1 denotes display switching determining means, which determines whether a specific operation has been applied to a switch on the operation panel 7. In the case of this embodiment, as an example, it is determined that the good night timer switch 11 and the good morning timer switch 12 are pressed at the same time. from a to b
is switching to The switching means 22 connects the data output from the normal display data generating section 19 to the display output means 18 when the contact is a, and the data output from the altitude display data generating section 16 when the contact is made. 23 is a combustion amount generating means for instructing a combustion amount according to strong combustion or weak combustion;
4 is an electromagnetic pump frequency setting means for instructing the driving frequency of the electromagnetic pump 3 that discharges kerosene in accordance with the combustion amount; 25 is a burner fan motor rotation speed setting means for instructing the rotation speed of the burner fan motor 4 corresponding to the combustion amount. It is.

Next, the operation will be explained. When the combustion equipment is used in a flat area at an altitude of 500 m or less, there is no need to particularly correct the rotation speed of the burner fan motor considering the actual performance of the combustor.

However, as the altitude increases to 500 m or more, the amount of combustion air gradually becomes insufficient, and there is a concern that exhaust gas characteristics may deteriorate due to incomplete combustion. Therefore, in order to set the amount of combustion air suitable for the altitude of the point where the equipment is used, first press the good night timer switch 11 and the good morning timer switch 12 at the same time.
The contact port of the switching means 22 is switched to cause the digital display section 8 to output an altitude display. Next, while adjusting the output of the volume 14, the altitude value output to the digital display section 8 is adjusted to the altitude of the point where the device is used. By this operation, the burner fan motor rotational speed is corrected to the optimum rotational speed using the correction amount output from the correction factor generating section 17, so that optimum combustion can be obtained. Further, when setting the combustion air amount according to the altitude, the volume 14 can be placed on the operation panel 7 and adjusted while checking the setting contents, so setting and checking are very easy and no skill is required. In this embodiment, a combination of volume and A/D conversion is used as the altitude setting means 13, but the same effect can be obtained by using a switch with a multi-contact structure such as a deep switch. Further, the display means for confirming the altitude is not limited to numerical display, and may be displayed in binary form using a plurality of display element groups.

Next, another example of setting the combustion air amount according to the altitude will be shown. FIG. 4 shows the variable damper 30 installed at the combustion air intake, as seen from arrow A in FIG. A movable piece 32 is attached to the variable damper 30 with a support shaft 33 so as to cover the opening 31 in a fan shape. Movable piece 3
2 is such that when rotated in the direction of arrow B, the area of the opening, which is the combustion air intake, increases, and along arrow B, the non-opening area is marked with a scale. This scale indicates the altitude, and one end 34 of the movable piece 32 is, for example, 10
Setting the scale to 00 indicates that the opening will have the required area at an altitude of 1000 m. Therefore, the amount of combustion air corresponding to the altitude can be set simply by aligning the movable piece 32 with the scale that matches the altitude of the point where the device is used.

Effects of the Invention As described above, according to the present invention, the following effects can be expected.

(1) Since the settings are made while checking the altitude settings, anyone can make adjustments and it is very easy.

(2) Since the altitude itself is specified, there are no setting errors or individual differences.

(3) Since the correction is performed using the rotational speed of the burner fan motor for which the correction factor can be calculated theoretically, the correction can be performed with high accuracy.

(4) Since there is no dedicated switch or display means for setting the altitude, no layout space is required.

(5) Settings can be made on the operation panel without touching the inside of the device.

(6) The lack of combustion air due to the altitude difference can be accurately corrected, so the best combustion can be obtained.

Further, according to the present invention, since the damper of the combustion air intake is provided with an altitude scale, the opening can be adjusted accurately without relying on experience or intuition. Another advantage is that it can be realized with a very simple structure, requiring no special display means or a volume for setting the altitude.

[Brief explanation of drawings]

FIG. 3 is a graph showing the relationship between the output voltage of the volume 14, the altitude value output from the altitude display data generating section 16, and the correction factor output from the correction factor generating section 17, and FIG. 4 shows another embodiment. FIG. 3 is a structural diagram of a variable damper. 1... Outer frame of hot air heater, 3... Electromagnetic pump, 4... Burner fan motor, 7...
...Operation panel, 13...Altitude setting means, 1
4... Volume, 15... Altitude determination means, 16... Altitude display data generation unit, 17.
. . . Correction factor generation unit, 21 . . . Display switching determination means, 30 . . . Variable damper, 32 .
...Movable piece. Figure Figure

Claims (3)

[Claims] (1) A combustor that performs combustion by mixing combustion air and fuel oil supplied from an electromagnetic pump, and a means for supplying the combustion air that is controlled to maintain the rotational speed at a target rotational speed. a burner fan motor, a display section comprising a plurality of display elements, a display switching means for switching the content displayed on the display section between a normal time and an altitude setting time, and an elevation setting means for setting the altitude at a plurality of levels. and altitude determining means for correcting the rotation speed of the burner fan motor according to the altitude set by the altitude setting means. (2) The altitude setting means is provided near the operation panel, and the display switching means is provided with a display switching discrimination means that is activated by performing an operation other than the original operation on an operation switch provided on the operation panel. A combustor altitude setting device according to claim 1. (3) A combustor that has a combustion air intake and performs combustion by mixing combustion air from the intake with fuel oil supplied from an electromagnetic pump, and a means for supplying the combustion air. a burner fan motor that is controlled to keep the rotation speed at a target rotation speed, a damper that is provided at the combustion air intake and that can vary the area of the opening, and a damper that is arranged so that the area of the opening corresponds to the altitude. Combustor elevation setting device with a notched scale.