JPH07127843A - Kerosene burner device - Google Patents

Abstract

PURPOSE:To permit stabilized combustion by reducing the fluctuation of kerosene supplying pressure for a spray nozzle when a reciprocating pump is employed. CONSTITUTION:A kerosene burner device is provided at least with a kerosene spray nozzle 2, a kerosene supplying pipeline 10 for supplying the spray nozzle 2 with kerosene from a kerosene tank, and an AC driven reciprocating pump 21 as well as a DC pulse driven flow rate controlling opening and closing valve 22, which are provided in the kerosene supplying pipeline 10. The period of opening time of the flow rate controlling opening and closing valve 22 is equalized to the period of AC of the receiprocating pump 21 while the central time of opening time of the flow rate controlling opening and closing valve 22 is set so as to be coinciding with a time of 1/4 period from the zero-cross point of driving AC of the reciprocating pump 21.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to petroleum burner equipment.

[0002]

2. Description of the Related Art Conventionally, as this kind of petroleum burner apparatus, an apparatus described in Japanese Patent Application Laid-Open No. 2-110210 has been provided. This device is equipped with two pumps in series in the oil supply line to the spray nozzle to supply oil to the spray nozzle.

[0003]

However, in the petroleum burner apparatus as described above, when the two pumps are reciprocating type pumps such as electromagnetic pumps, the two pumps independently perform reciprocating operation. The oil supply pressure to the spray nozzle, and hence the spray pressure, tends to be unstable, and the combustion noise becomes a noise.

Therefore, the present invention solves the above-mentioned drawbacks of the conventional apparatus, reduces fluctuations in the oil supply pressure to the spray nozzle when a reciprocating pump is used, and provides an oil burner apparatus capable of performing stable combustion. For the purpose of provision.

[0005]

To achieve the above object, an oil burner apparatus of the present invention comprises an oil spray nozzle, an oil supply line for supplying oil from an oil tank to the spray nozzle, and the oil spray nozzle. A petroleum burner device having at least an AC driven reciprocating pump and a DC pulse driven flow rate control on-off valve provided in a supply pipeline, wherein an opening time period of the flow rate control on-off valve and an AC period of the reciprocating pump. And the central time of the opening time of the flow control on-off valve is 1 from the zero cross point of the driving AC of the reciprocating pump.
The first feature is that the time is equal to / 4 cycle. In addition to the first characteristic, the petroleum burner device of the present invention is arranged such that the second reciprocating pump is arranged between the two pumps in series with the flow control on-off valve and the flow control on-off valve. The second feature is that it is provided on the upstream side and the two pumps are synchronized in phase.

[0006]

According to the first feature of the present invention, the oil flowing from the oil supply line is pushed forward by the AC driven reciprocating pump when the flow control on-off valve is opened. Is supplied to the oil spray nozzle. At this time, the AC cycle of the reciprocating pump and the opening time cycle of the flow control on-off valve become the same, and the peak of the driving AC of the reciprocating pump coincides with the central time of the opening time of the flow control on-off valve. Therefore, the conditions for oil supply by the reciprocating pump and the flow rate control on-off valve are always constant, and a stable and stable oil supply can be secured. According to the second aspect of the present invention, in addition to the operation of the first aspect, the second reciprocating pump supplies oil from the oil tank to the front side, and the flow rate control on-off valve and the AC drive. The oil can be easily sent to the oil spray nozzle by means of the reciprocating pump. Then, at that time, by synchronizing the AC driven reciprocating pump and the second reciprocating pump in phase,
Further, stable oil supply with less fluctuation of oil pressure can be performed to the oil spray nozzle. Therefore, of course, the ejection amount and ejection pressure from the nozzle are stabilized, and the combustion noise is reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram showing an embodiment of a petroleum burner device of the present invention, and FIG. 2 is an electric circuit diagram of essential parts of the present invention device.
FIG. 3 is a drive waveform diagram of an AC driven reciprocating pump and a flow rate control on-off valve, FIG. 4 is a flow chart for explaining the operation control operation of the device of the present invention, FIG. 5 is a flow chart for explaining the control of the flow rate control on-off valve, and FIG. 3 is a flowchart for explaining an operation for detecting the frequency of driving AC of a reciprocating pump driven by AC.

First, the overall construction of the embodying apparatus will be described with reference to FIG. Reference numeral 1 denotes a combustion can body, and a petroleum spray nozzle 2 faces the inner space of the combustion can body 1. The fan motor 3 blows air from around the petroleum spray nozzle 2 into the combustion can body 1. Combustion can 1
A heat exchange section 5 continuous with the water inlet pipe 4 and the hot water outlet pipe 6 is provided in the upper part of the inner space. The water inlet pipe 4 is provided with a water flow rate sensor 7 and a water temperature sensor 8. Reference numeral 9 is an igniter for ignition.

An oil supply line 10 is connected to the oil spray nozzle 2.
Further, the oil spray nozzle 2 is provided with a return line 11 as a return type nozzle. In the oil supply line 10, from the side closer to the oil spray nozzle 2, an AC driven reciprocating pump 21 and a DC pulse driven flow control on-off valve.
22 is provided, and the return line 11 is connected between an AC driven reciprocating pump 21 and a DC pulse driven flow control on-off valve 22. A second reciprocating pump 23 is provided on the upstream side of the flow rate control on-off valve 22 so as to feed oil from an oil tank (not shown) to the front of the oil supply pipeline 10. Reference numeral 30 is a controller for controlling the entire oil burner device, which inputs a command from the remote controller 40 and information from the incoming water flow rate sensor 7, the incoming water temperature sensor 8 and other sensors, and the pumps 21 and 23 and the flow rate. A predetermined operation command is output to the control on-off valve 22 and other members.

Referring to FIG. 2, the controller 30 has a microcomputer 31 built therein and issues an operation command to each section via an output circuit 32. The AC driven reciprocating pump 21
Is supplied with half-wave rectification from an AC power supply 51, for example, a commercial power supply, via a diode 52. Further, the flow control on-off valve 22
A direct current is supplied from the direct current power source 53 to the transistor via the transistor 54. By controlling the base current of the transistor 54 by the controller 30, the flow rate control on-off valve 22 can be driven by DC pulse. The operation of the reciprocating pump 21 is started by the controller 30 turning on the switch 56 via the relay 55. When the second reciprocating pump 23 is an AC-driven pump, the second reciprocating pump 23 and the switch 56 are arranged in parallel with the reciprocating pump 21 and the switch 56 in a form sharing the AC power source 51 and the diode 52. Can be placed. On the other hand, the second reciprocating pump
When the DC pump 23 is used, the pump 23 and the transistor can be arranged in parallel with the flow rate control on-off valve 22 and the transistor 54 by sharing the DC power supply 53.

The operation control of the device by the controller 30 will be described. First, referring to FIG. 4, when there is an operation command for the device (Yes in S1), the controller 30 turns on the fan motor 3, the igniter 9, the second reciprocating pump 23, and the flow rate. The control on-off valve 22 is opened and closed with the initial value, and the reciprocating pump 21 is turned on (S2). As a result, if ignition occurs (YES in S3), the igniter 9 is turned off (S4), and opening / closing operation control of the flow rate control opening / closing valve 22 is started (S5).

The opening / closing operation control of the flow rate control opening / closing valve 22 is shown in FIG.
Referring to, first, the controller 30 inputs the water flow rate Q input from the water flow rate sensor 7, the set hot water temperature T _S input from the remote controller 40, and the water temperature T input from the water temperature sensor 8.
_The required combustion heat quantity is calculated from _c (S11), and the opening time of the flow rate control on-off valve 22, that is, the DC pulse width W is calculated from this necessary combustion heat quantity (S12). Then, the opening start time T _ON of the flow rate control on-off valve 22 is calculated by the following formula from the cycle C of the driving AC power supply of the reciprocating pump 21 and the opening time W (S).
13). T _ON = C / 4−W / 2 Then, from the zero cross point (ZC point) of the driving AC power supply to T
At the time when _{ON has} passed, that is, T _ON time (YES in S14), a DC pulse is applied to the flow control on-off valve 22 via the transistor 54 to open the valve 22 for the opening time W (S).
15). When the opening time W has elapsed (YES in S16), the valve 22 is closed (S17). And set outlet temperature T
_{As long as S} , the incoming water temperature T _c , and the incoming water flow rate Q do not change, the steps S14 to S17 are repeated. The relationship between the opening time W and opening start time T _{ON of the} flow control on-off valve 22 and the cycle C of the driving AC of the reciprocating pump 21 is as shown in FIG. 3, and in short, the opening of the flow control on-off valve 22. The cycle of time W and the cycle C of the driving AC of the reciprocating pump 21 are made the same,
In addition, the central time of the opening time W of the flow rate control on-off valve 22 is made to coincide with the time of 1/4 cycle from the zero cross point of the driving AC of the reciprocating pump 21. By doing so, the operation of the reciprocating pump 21 and the operation of the flow rate control on-off valve 22 are always performed under constant conditions, and a stable oil supply with little fluctuation can be secured. Also, the set hot water temperature T _S
Even when the opening time W of the flow rate control on-off valve 22 is changed in accordance with the change of the above, it is possible to reduce the hydraulic pressure fluctuation due to the change.

Regarding the calculation of the driving AC cycle C of the reciprocating pump 21, the controller 30 detects the AC zero-cross point by the AC power supply 51 in advance and calculates the zero-cross point with reference to FIGS. To the zero cross point is measured (S21), and the frequency of the AC power supply 51 is calculated from this. Of course, when a commercial power source is used, it may be determined whether the frequency of 50 hertz is 60 hertz (S22).
Then, the cycle C is calculated from the frequency and stored (S2
3).

As described above, the second reciprocating pump 23 can be an AC drive pump of the same type as the pump 21, or a DC drive pump. In that case,
By controlling the second reciprocating pump 23 so as to be in-phase synchronized with the pump 21, it is possible to supply oil under stable conditions with less fluctuation in hydraulic pressure.

[0015]

According to the petroleum burner device of the present invention, the opening time period of the flow control valve and the AC period of the reciprocating pump are the same. Since the central time of the opening time of the flow control on / off valve is made to coincide with the time of 1/4 cycle from the zero cross point of the driving AC of the reciprocating pump, the condition of oil supply by the reciprocating pump and the flow control on / off valve is It is always constant and a stable and stable oil supply can be secured. According to the petroleum burner apparatus of the second aspect, in addition to the effect of the configuration of the first aspect, the second reciprocating motion is achieved by arranging the flow rate control on-off valve between the two pumps in series. A pump is provided upstream of the flow rate control on-off valve, and 2
Since the two pumps are synchronized with each other in phase, a stable oil supply with less fluctuation in hydraulic pressure can be performed to the oil spray nozzle. Therefore, of course, the ejection amount and ejection pressure from the nozzle can be stabilized, and the combustion noise can be reduced.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a petroleum burner device of the present invention.

FIG. 2 is an electric circuit diagram of a main part of the device of the present invention.

FIG. 3 is a drive waveform diagram of an AC driven reciprocating pump and a flow rate control on-off valve.

FIG. 4 is a flow chart illustrating an operation control operation of the device of the present invention.

FIG. 5 is a flowchart illustrating control of a flow rate control on-off valve.

FIG. 6 is a flowchart illustrating an operation for detecting the frequency of driving AC of an AC driven reciprocating pump.

[Explanation of symbols]

 1 Combustion Can 2 Petroleum Spray Nozzle 10 Oil Supply Pipeline 11 Return Pipeline 21 Reciprocating Pump 22 Flow Control Open / Close Valve 23 Second Reciprocating Pump 30 Controller

Claims (2)

[Claims] 1. An oil spray nozzle, an oil supply line for supplying oil to the spray nozzle from an oil tank, an AC driven reciprocating pump and a DC pulse drive flow rate control provided in the oil supply line. An oil burner device having at least an on-off valve, wherein the opening time period of the flow rate control on-off valve and the AC cycle of the reciprocating pump are the same, and the central time of the opening time of the flow rate control on-off valve is the reciprocating time. A petroleum burner device characterized in that it is made to coincide with the time of 1/4 cycle from the zero cross point of the driving AC of the dynamic pump. 2. A second reciprocating pump is provided upstream of the flow control on-off valve such that the flow control on-off valve is located between two pumps in series, and the two pumps are in-phase synchronized. The petroleum burner apparatus according to claim 1, wherein the petroleum burner apparatus is provided.