JPH0814535A - Safety device for kerosene burning equipment - Google Patents

Abstract

PURPOSE:To increase the reliability of a burning equipment and facilitate the maintenance of the same by operating a safety means when the flow rate of a fuel pump is abnormal. CONSTITUTION:A burner is attached to the inside of a frame body of a burning equipment while the supplying amount of a fuel pump 4 is determined by a pump flow rate determining means 5. A weight sensor 6 is attached to an oil tank mounted in the frame body and the weight of the oil tank is operated by a tank weight operating means 7 from the output of the weight sensor 6. A tank weight memory means 9, storing the weight of the oil tank, and a flow rate accumulating means 8, accumulating the output of the pump flow rate determining means 5, are provided while a comparing and deciding means 10 compares the reference weight of employing fuel, which is obtained from the flow rate accumulating means 8, with the actual weight of employing fuel, which is obtained from the tank weight memory means 9 and the tank weight operating means 7, to operate a safety means 11 when the weight of the fuel is abnormal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects a failure of a fuel pump, an abnormality such as a filter clogging, or the like to ensure a safe operation.

[0002]

2. Description of the Related Art Recently, when a fuel pump is used to supply fuel to a burner, a computer has come to be often used to finely control the flow rate. When controlling the fuel flow rate with high precision, if dust or sludge adheres to the inside of the fuel pump or the fuel pipe, the fuel flow rate may change, and as a countermeasure for this, the fuel is conventionally filtered using a filter. Then, the clean fuel is pumped up by the fuel pump.

[0003]

By the way, if dust or sludge is attached to the filter for a long time and used for a long time, a large amount of dust or sludge may pass through the filter and be sucked into the fuel pump. , If the filter is overconfident, you may not notice the insufficient flow rate due to clogging of the fuel pump.

Further, when the fuel pump fails, it is easily noticed that the fuel pump is out of order if the fuel pump is completely stopped. However, when the fuel flow rate is wrong, it is operating normally from the appearance. , I do not notice this trouble. Therefore, when abnormal combustion is caused by breaking the balance between the amount of fuel and the amount of air, it is very slow to notice that the cause is the fuel pump, and repair time often takes a long time.

[0005]

SUMMARY OF THE INVENTION The present invention detects an abnormality of a fuel pump during combustion of an oil combustor and activates a safety means. An oil tank 2 mounted in a frame 1 is connected to a burner 3. A fuel pump 4 for supplying fuel is attached, and a weight sensor 6 is attached to the oil tank 2 in an oil combustor that determines a discharge flow rate of the fuel pump 4 by a signal from a pump flow rate determining means 5 that determines a combustion amount of the burner 3. A tank weight calculating means 7 for receiving a signal from the weight sensor 6 is provided, a flow rate integrating means 8 for the fuel pump 4 which receives the signal from the pump flow rate determining means 5 is provided, and a tank weight for the tank weight calculating means 7 is provided. A comparison / determination means 1 is provided which is provided with a tank weight storage means 9 for storing signals, and which receives signals from the flow rate integration means 8, tank weight calculation means 7 and tank weight storage means 9 as inputs.
0 is provided, and the comparison / determination means 10 compares the reference used fuel weight obtained from the flow rate integration means 8 with the actual used fuel weight obtained from the signals of the tank weight storage means 9 and the current tank weight calculation means 7, The safety means 11 is activated when the difference between the two fuel weights is abnormal.

Further, the tank weight storage means 9 reads and stores the tank weight signal of the tank weight calculation means 7 and resets the integrated data of the flow rate operation means 8 so that the data integrated by the flow rate integration means 8 is burned. The data becomes the data from the time when the weight data is stored in the tank weight storage means 9 on the way, which facilitates comparison and determination.

[0007]

The pump flow rate determining means 5 sends the flow rate corresponding to the set combustion amount of the burner 3 to the flow rate integrating means 8, and the flow rate integrating means 8 uses the fuel that should have been supplied from the fuel pump 4 to the burner 3. I am accumulating.

On the other hand, since the weight sensor 6 attached to the oil tank 2 outputs as a pressure change or resistance change, it can be converted into the weight of the oil tank 2 by the tank weight calculation means 7, and the tank weight storage means 9 can be used. When activated, the tank weight data of the tank weight calculation means 7 is read and stored.

When the comparison / determination means 10 operates, the comparison / determination means 10 calculates the reference fuel weight of the flow rate integration means 8 and the actual fuel weight obtained from the tank weight storage means 9 and the tank weight calculation means 7. In comparison, when the difference in the compared fuel weights is abnormal, the safety means 11 is activated to cope with the abnormality of the fuel pump 4.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the embodiments shown in the drawings. 1 is a frame of an oil combustor, 2 is an oil tank mounted in the frame 1, and the oil tank 2 shown is a constant oil leveler. And the fuel is supplied by the cartridge tank 2a.

Reference numeral 3 is a burner mounted in the frame 1, 12 is an ignition heater mounted in the burner 3, 13 is a blower for combustion for supplying combustion air to the burner 3, and 4 is an electromagnetic pump mounted in the oil tank 2. Is a fuel pump that supplies fuel to the burner 3 that is a pot-type combustor, and the ignition heater 12
Ignition and combustion are started by.

Reference numeral 14 is a room thermostat attached to the frame, and 15
Is a combustion amount setting means that the operator operates with a button or the like, and is usually performed by setting a desired room temperature.

Reference numeral 5 is a pump flow rate determining means for calculating the combustion amount required by the burner 3 from the signal from the room thermostat 14 and the signal from the combustion amount setting means 15, and 16 is the fuel pump 4 according to the signal from the pump flow rate determining means 5. The fuel pump 4 is a pump driving means for driving, and the fuel pump 4 is a pump flow rate determining means 5
The fuel flow rate determined by the above is supplied to the burner 3.

Reference numeral 6 denotes a weight sensor attached to the bottom of the oil tank 2. Various types of the weight sensor 6 are commercially available. For example, when pressure is applied, the internal impedance of the semiconductor element changes due to strain, and A change in weight of the tank 2 and the cartridge tank 2a can be detected as a change in resistance value. When the oil tank 2 can be moved by an elastic body such as a spring, a permanent magnet and a coil can be combined to detect a change in weight of the oil tank 2 by a change in current flowing through the coil due to contact and separation between the permanent magnet and the coil. . Reference numeral 7 is a tank weight calculation means for converting the signal of the weight sensor 6 into the actual weight of the oil tank 2.

Reference numeral 9 is a tank weight storage means for storing the tank weight signal of the tank weight calculation means 7 when it is used as a reference at the time of starting operation, and 8 is integrated with the supply flow rate of the fuel pump 4 determined by the pump flow rate determining means 5. It is a flow rate integrating means. 10
Is a comparison / determination means for determining an abnormality in the supply flow rate of the fuel pump 4, and the comparison / determination means 10 is a tank weight calculation means 7
To read the current weight data of the oil tank 2, read the weight data of the oil tank 2 at the start of operation from the tank weight storage means 9, and further read the integrated data of the flow rate from the start of operation to the present time from the flow rate integration means 8. , The reference weight of fuel used and the weight of actual fuel used are compared.

Reference numeral 11 is a safety means which is driven by an output signal of the comparison / determination means 10 at the time of an abnormality, and indicates an abnormality by an LED or a lamp, generates an alarm sound by a buzzer or the like, or is in a serious abnormality state. The operation of stopping the operation of the oil combustor is performed.

The determination operation of the comparison / determination means 10 may be always performed from the start of operation, or the determination operation may be performed in synchronization with a specific signal of the control device for the oil combustor. Furthermore,
When it is desired to know the specific fuel flow rate of the fuel pump during maintenance of the oil combustor or the like, the timing means 17 may be operated, and the tank weight storage means 9 receives the signal from the timing means 17 and the tank weight storage means 9 is operated by the tank weight calculation means 7. The tank weight signal is read and stored, and a reset signal is sent to the flow rate integrating means 8 to clear the flow rate data of the flow rate integrating means 8 to restart the integration. Next, the timing means 17 sends a signal to the comparison / determination means 10 to perform the determination operation, and according to the result of the comparison / determination means 10, the safety means 11
It is also possible to operate as a reference data for maintenance.

Reference numeral 18 is an empty-fire detection means for inputting the tank weight data of the tank weight calculation means 7, and the oil tank 2
The safety means 11 is actuated when becomes empty.

[0019]

As described above, according to the present invention, the reference fuel weight is known by the flow rate integrating means 8 of the fuel pump 4 determined by the combustor, while the weight sensor 6 is attached to the oil tank 2 to store the tank weight. Know the actual fuel weight from the oil tank weight stored in the means 9 and the current oil tank weight,
The abnormality signal of the fuel pump 4 is detected by the difference signal between the two used fuel weights.

For this reason, even if the fuel pump 4 is operating without stopping, if an abnormality occurs in the fuel flow rate due to a pump failure or dust clogging, this abnormality can be promptly detected and can be maintained for a long time. The trouble of continuing abnormal combustion while breaking the balance of fuel and air quantity was prevented, and the reliability of the combustor was improved.

Further, the data of the flow rate integrating means 8 and the tank weight storage means 9 can be reset not only when the combustor is started, but also when the combustor is running so that the measurement start time can be set again. The fuel pump 4 can be forcibly determined during maintenance, and maintenance work can be performed efficiently.

That is, if the filter of the oil tank 2 is clogged with dust or sludge, it is conventionally impossible to judge the quality of the fuel pump at the site of repair. In many cases, wasteful work such as overhauling or replacing the fuel pump was performed. But,
In the present invention, the display of the safety means 11 to which the output of the comparison and determination means 10 is connected makes it possible to easily determine the quality of the fuel pump, the true cause of the trouble can be pursued in a short time, and the work efficiency is improved. It is a thing.

The quality of the fuel pump 4 is judged by operating the combustor without removing the fuel pump 4, and it is not necessary to prepare a special measuring device, and the site of repair is not required. It is easy to handle and can be dealt with immediately.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a device of the present invention.

FIG. 2 is a sectional view of an oil combustor for implementing the device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame 2 Oil tank 3 Burner 4 Fuel pump 5 Pump flow rate determination means 6 Weight sensor 7 Tank weight calculation means 8 Flow rate integration means 9 Tank weight storage means 10 Comparison determination means 11 Safety means

Claims (2)

[Claims] 1. A fuel pump 4 for supplying fuel to a burner 3 is attached to an oil tank 2 attached to a frame 1, and the burner 3 is attached.
In the oil combustor that determines the discharge flow rate of the fuel pump 4 by the signal of the pump flow rate determining means 5 that determines the combustion amount of the 7, a fuel pump 4 to which the signal from the pump flow rate determining means 5 is input
And a tank weight calculating means 7 are provided.
The comparison / determination means 1 is provided with the tank weight storage means 9 for storing the tank weight signal, and receives the signals of the flow rate integration means 8, the tank weight calculation means 7, and the tank weight storage means 9 as inputs.
0 is provided, and the comparison / determination means 10 compares the reference used fuel weight obtained from the flow rate integration means 8 with the actual used fuel weight obtained from the signals of the tank weight storage means 9 and the current tank weight calculation means 7, A safety device for an oil combustor, which operates the safety means 11 when the difference between the two fuel weights is abnormal. 2. The petroleum combustor safety device according to claim 1, wherein the tank weight storage means 9 reads and stores the tank weight signal of the tank weight calculation means 7, and resets the integrated data of the flow rate calculation means 8.