JPH1073248A - Heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decide the existence of leakage of fuel correctly in a heating system provided with a plurality of sets of heaters, connected to a fuel tank through a fuel supplying pipe, and a valve as well as a flowmeter, which are provided between the fuel tank and the heaters. SOLUTION: A heating system is provided with a microcomputer, outputting an operation signal, a temporality stopping signal and a fuel leakage monitoring signal, as well as a centralized processing controller 2, receiving the operation signal as well as temporarily stopping signal from the microcomputer and outputting a combustion starting signal as well as a combustion stopping signal to heaters 5. The heating system is also provided with a fuel supply intercepting device 3, detecting the flow rate of fuel, flowing out of a fuel tank 11 under a condition that the operation of all of the heaters 5 are stopped by receiving a fuel leakage monitoring signal from the microcomputer through a flowmeter 15 and closing a valve 13 to stop the supply of fuel and the combustion of the heaters when the flow rate is counted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating system comprising a plurality of heaters using kerosene or gas as fuel.
More specifically, the present invention relates to a heating system that has a function of shutting off fuel supply when a fuel leak occurs and is suitable for use in large-scale properties such as schools and inns.

[0002]

2. Description of the Related Art Conventionally, in a heating system of this kind,
If a fuel leak occurs during the centralized control operation of multiple heaters, it is necessary to stop fuel supply and combustion to enhance safety. The flow rate was detected by a flow meter, and the presence or absence of fuel leakage was determined based on the increase or decrease of the flow rate.

[0003]

However, in this case, since the detection of the fuel flow rate is performed simultaneously with the centralized control operation of the heater, the variation in the flow rate to each heater and the variation in the volume due to the temperature change of the fuel, or Due to variations in the accuracy of the flow meter and the like, the accuracy of the detection is inferior, and there has been an inconvenience that it is not always possible to accurately determine the presence or absence of fuel leakage.

The present invention has been made in view of the above circumstances, and has as its object to provide a heating system capable of accurately detecting the presence or absence of fuel leakage by increasing the accuracy of fuel flow rate detection.

[0005]

That is, the present invention provides a plurality of heaters connected to a fuel tank via a fuel supply pipe, a valve provided between the fuel tank and these heaters, and a flow rate. Heating system with
A microcomputer that outputs an operation signal, a stop signal, and a fuel leak monitoring signal; and a centralized control device that receives the operation signal and the stop signal from the microcomputer and outputs a combustion start signal and a combustion stop signal to the heater. Receiving a fuel leak monitoring signal from the microcomputer, detecting the flow rate of fuel flowing out of the fuel tank with the flow meter in a state in which all the heaters are stopped, and counting the flow rate. And a fuel supply shutoff device for closing the valve to stop fuel supply and combustion.

The present invention also provides a heating system comprising a plurality of heaters connected to a fuel tank via a fuel supply pipe, and a valve and a flow meter provided between the fuel tank and the heaters. A microcomputer that outputs an operation signal, a stop signal, and a fuel leak monitoring signal; and a centralized unit that receives the operation signal and the stop signal from the microcomputer and outputs a combustion start signal and a combustion stop signal to the heater. Upon receiving a fuel leak monitoring signal from the control device and the microcomputer, the flow meter detects the flow rate of the fuel flowing out of the fuel tank while all the heaters are stopped, and counts the flow rate. A fuel supply shut-off device that closes the valve to stop fuel supply and combustion in the event of being shut down, and a timer that sets a combustion stop time of the heater. It is made.

[0007]

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

FIG. 1 is a wiring diagram showing one embodiment of a heating system according to the present invention, and FIG. 2 is a control block diagram of the heating system shown in FIG.

A heating system 1 according to the present invention has a fuel tank 11 as shown in FIG.
A fuel supply pipe 12 is connected to 1. Fuel supply pipe 1
A plurality of (for example, 100) heaters 5 are connected in parallel to 2, and a valve 13 and a flow meter 15 are sequentially provided between the fuel tank 11 and these heaters 5.

On the other hand, the heating system 1 includes a central control unit 2, and a signal line 6 is provided between the central control unit 2 and each of the heaters 5. In addition, the central control device 2
Is connected to a fuel supply cutoff device 3 and a timer 4 via signal lines 7 and 8, and a signal line 9, 1 is connected between the fuel supply cutoff device 3 and the valve 13 and the flow meter 15.
0 is provided.

As shown in FIG. 2, the heating system 1 has a microcomputer 14 incorporated therein.
Is connected to the flow meter 15, the centralized control device 2, the fuel supply cutoff device 3, the timer 4, and the valve 13.

Since the heating system 1 according to the present invention has the above-described configuration, when the heating system 1 is operated, the microcomputer 14 performs centralized control based on the contents instructed by input means (not shown) by manual operation. Device 2
Control the operation of. That is, the microcomputer 14 outputs an operation signal to the central control device 2, and in response, the central control device 2 outputs a combustion start signal to some heaters 5. Then, the heater 5 starts the heating operation by burning the fuel supplied from the fuel tank 11 via the fuel supply pipe 12.

By the way, in some cases, fuel leakage may occur during the heating operation, and in order to cope with such a situation, the microcomputer 14 outputs a temporary stop signal to the central control device 2 and a fuel supply cutoff device. 3 outputs a fuel leak monitoring signal.

Then, the central control device 2 outputs a combustion stop signal to all the heaters 5 in operation, and in response to this, the heaters 5 temporarily stop for a predetermined time (for example, one minute). Stop burning. The setting of this combustion stop time
This is performed by the microcomputer 14 setting a predetermined time in the timer 4. On the other hand, the fuel supply cutoff device 3 detects the flow rate of the fuel flowing out of the fuel tank 11 with the flow meter 15 and determines whether or not there is a fuel leak. That is, at this time, since the combustion of all the heaters 5 has been stopped,
The fuel supply cutoff device 3 determines that no fuel leak has occurred when the flow rate is not counted as a result of the detection by the flow meter 15, and conversely, when the flow rate has been counted, a fuel leak occurs. The fuel supply and the combustion are stopped by closing the valve 13.

As described above, the flow rate of the fuel is detected while all the heaters 5 are stopped, so that the microcomputer 14 can concentrate on monitoring the fuel leakage. The detection can be performed with high accuracy, and the determination of the presence or absence of fuel leakage can be accurately performed.

At this time, if the combustion stop time of the heater 5 is shortened, the change in the room temperature due to the stop of the combustion becomes negligible, so that the fuel leakage is monitored without changing the room temperature. be able to.

[0017]

As described above, according to the present invention, a plurality of heaters connected to a fuel tank via a fuel supply pipe, and a valve provided between the fuel tank and these heaters And a microcomputer that outputs an operation signal, a pause signal, and a fuel leakage monitoring signal, and a combustion start signal to the heater based on the operation signal and the pause signal from the microcomputer. And a centralized control device that outputs a combustion stop signal, and receives a fuel leak monitoring signal from the microcomputer, and measures a flow rate of fuel flowing out of the fuel tank in a state where all the heaters are stopped. And a fuel supply shut-off device that closes the valve to stop fuel supply and combustion when the flow rate is counted. Since the operation of the machine can be carried out flow rate detection of the fuel in a state of being stopped, it is possible to determine accurately whether the fuel leakage by increasing the flow rate detection accuracy of the fuel.

According to the present invention, there are provided a plurality of heaters connected to the fuel tank via the fuel supply pipe, and a valve and a flow meter provided between the fuel tank and the heaters. And a microcomputer that outputs an operation signal, a pause signal, and a fuel leak monitoring signal, and outputs a combustion start signal and a combustion stop signal to the heater in response to the operation signal and the pause signal from the microcomputer. A centralized control device that receives the fuel leak monitoring signal from the microcomputer, detects the flow rate of the fuel flowing out of the fuel tank with the flow meter in a state where all the heaters are stopped, and detects the flow rate. A fuel supply cut-off device that closes the valve to stop fuel supply and combustion when counted, and a timer that sets a combustion stop time of the heater. In addition to being able to detect the fuel flow rate in a state where all heaters are stopped, the timer can set the combustion stop time of the heater short, so that the room temperature can be reduced. It is possible to accurately determine the presence or absence of fuel leakage without any change.

[Brief description of the drawings]

FIG. 1 is a wiring system diagram showing one embodiment of a heating system according to the present invention.

FIG. 2 is a control block diagram of the heating system shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Heating system 2 ... Centralized control device 3 ... Fuel supply cutoff device 4 ... Timer 5 ... Heater 11 ... Fuel tank 12 ... Fuel supply pipe 13 ... Valve 14 ... Microcomputer 15 ... Flow rate Total

Claims (2)

[Claims] 1. A heating system comprising: a plurality of heaters connected to a fuel tank via a fuel supply pipe; and a valve and a flow meter provided between the fuel tank and the heaters. A microcomputer that outputs an operation signal, a stop signal, and a fuel leakage monitoring signal; a centralized control device that receives the operation signal and the stop signal from the microcomputer and outputs a combustion start signal and a combustion stop signal to the heater. Receiving the fuel leak monitoring signal from the microcomputer, detecting the flow rate of the fuel flowing out of the fuel tank with the flow meter in a state where all the heaters are stopped, and counting the flow rate. And a fuel supply cutoff device for closing the valve to stop fuel supply and combustion. 2. A heating system comprising: a plurality of heaters connected to a fuel tank via a fuel supply pipe; and a valve and a flow meter provided between the fuel tank and the heaters. A microcomputer that outputs an operation signal, a stop signal, and a fuel leakage monitoring signal; a centralized control device that receives the operation signal and the stop signal from the microcomputer and outputs a combustion start signal and a combustion stop signal to the heater. Receiving the fuel leak monitoring signal from the microcomputer, detecting the flow rate of the fuel flowing out of the fuel tank with the flow meter in a state where all the heaters are stopped, and counting the flow rate. A fuel supply shut-off device that closes the valve to stop fuel supply and combustion, and a timer that sets a combustion stop time of the heater. Heating system to be.