JP2973462B2 - Liquid fuel combustion device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion apparatus for burning liquid fuel in a separate tank.

2. Description of the Related Art An example of a conventional liquid combustion apparatus will be described with reference to FIG. In the figure, 1 is a liquid fuel combustion device main body, 2 is a burner, 3 is a combustion chamber, 4 is a heat exchanger, 5 is a separate tank for liquid fuel, and 6 is a liquid fuel in the separate tank 5. A leveler 7 that stores an appropriate amount in the combustion device body 1 is a liquid fuel supply device that supplies the liquid fuel in the liquid fuel supply device to the burner 2, 8 is a circulation pump for hot water, 9 is a hot water pipe, and 10 is an indoor radiator. , 11 is a driving operation unit, 12 is a signal cable, and 13 is a driving control unit.

The operation of the liquid fuel combustion device thus configured will be described. First, the liquid fuel in the separate tank 5 is guided into the liquid fuel combustion device main body 1 by the leveler 6 and stored therein in an appropriate amount. Here, when an operation switch (not shown) provided in the operation operation unit 11 is turned ON, a combustion ON signal is sent to the operation control unit 13 through the signal cable 12. The operation control unit 13 controls the liquid fuel supply device 7 based on the combustion ON signal.
To drive the liquid fuel in the leveler 6 to the burner 2.
The sent liquid fuel forms a flame in the burner 2 and the combustion chamber 3
And heat exchange in the heat exchanger 4 to produce hot water. The hot water is sent to the indoor radiator 10 through the hot water pipe 9 by the hot water circulation pump 8 and radiates heat.

Problems to be Solved by the Invention However, in the above configuration, the liquid fuel combustion device main body 1 and the separate tank 5 are often placed outside the passage room,
Driving operation unit 11 provided for the user to operate the device
The user cannot directly check the combustion state of the liquid fuel combustion device main body 1 or the abnormality of the fuel leakage from the place where is installed. Therefore, when fuel leaks from the liquid fuel combustion device main body 1 or from the pipe connection portion, the user is likely to notice this abnormality, and in some cases, the liquid fuel in the separate tank 5 may be entirely discharged. And the device is inconvenient for the user. Further, when an abnormality occurs in the liquid fuel supply device 7 and the fuel is excessively sent to the burner 2, abnormal combustion occurs, which causes deterioration of components and soot clogging, which is insufficient in reliability. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide an easy-to-use and highly reliable liquid fuel supply device.

Means for Solving the Problems To solve the above problems, the liquid fuel combustion device of the present invention is provided with a flow sensor for liquid fuel in the middle of a fuel pipe connecting a separate tank and a leveler in the main body. The flow rate sensor detects whether the flow rate of the liquid fuel in the fuel pipe is higher than the flow rate limit value determined by the burner setting at that point by a certain value or more. An operation control unit for interrupting the flow of fuel is provided.

In the second liquid fuel combustion device, a fuel cutoff valve is provided in the middle of the fuel pipe as in the case of the flow rate sensor, and the flow rate detected by the flow rate sensor becomes larger than a flow rate limit value set in accordance with the burner combustion amount. When the burner burns or not burns, the fuel cut-off valve operates regardless of whether
The user is informed of the abnormal flow rate by a display unit provided in the room.

Effect of the Invention With the above-described configuration, the present invention leads to an unsafe state or parts deterioration due to fuel leakage or abnormal combustion due to excessive flow rate of the liquid fuel combustion device main body that cannot be directly seen when the user performs a driving operation. The fuel can be shut off without any trouble, and a highly reliable and easy-to-use liquid fuel combustion device can be obtained.

Embodiment A liquid fuel combustion apparatus according to an embodiment of the present invention will be described below with reference to FIGS. 21 is a liquid fuel combustion device main body, 22 is a burner provided in the liquid fuel combustion device main body 21, 23 is a combustion chamber, 24 is a heat exchanger, 25 is a separate tank for liquid fuel, and 26 is the separate A leveler that stores an appropriate amount of the liquid fuel in the tank 25 into the liquid fuel combustion device main body 21;
27 is a fuel pipe that connects the separate tank 25 and the liquid fuel supply device 26, 28a is a flow sensor provided in the fuel pipe and detects a fuel flow rate in the pipe, and 28b is a fuel shut-off also provided in the fuel pipe. A valve 29, an operation control unit mainly composed of a microcomputer (not shown), 30 a liquid fuel supply device for supplying the liquid fuel in the leveler to the burner 22, 31 a circulation pump for hot water, 32 a hot water pipe 33, an indoor radiator; 34, an operation unit having an operation switch (not shown); 35, a display unit provided in the operation unit 34; 36, a signal cable connecting the operation unit 34 and the operation control unit 29 It is.

Regarding the liquid fuel combustion device configured as described above,
The operation will be described below with reference to the flowchart of FIG. The flow rate sensor 28a provided in the fuel pipe 27 always detects the flow rate of the liquid fuel flowing in the pipe and sends it to the operation control unit 29 as a signal. The operation control unit 29 determines whether or not the burner 22 is burning, or if it is burning, at which combustion amount setting it is burning, and based on this, determines the flow rate limit value in the fuel pipe 27 in that state. It is set in advance and it is always determined whether or not the output from the flow sensor 28a exceeds this flow limit. When the output from the flow sensor 28a is normal and it is determined that there is no abnormality such as fuel leakage, the user operates the operation switch provided in the operation operation unit 34.
ON, when the operation ON signal is sent from the operation operation unit 34 to the operation control unit 29 via the signal cable 36, the operation control unit 29 confirms that the operation signal has been turned on, and drives the liquid fuel supply device 30 to The liquid fuel is sent to the burner 22 by the leveler 26 to start combustion. The flame formed by the burner 22 burns in the combustion chamber 23 and is exchanged with hot water by the heat exchanger 24. The hot water is passed through a hot water pipe 32 by a hot water circulation pump 31 and the indoor radiator 33
To be dissipated.

In the course of this operation state, when detecting that the output of the flow sensor 28a has become higher than a value previously set according to the operation state, the operation control unit 29 sets the output of the flow sensor 28a for a predetermined time. The operation control unit 29 checks whether the flow rate is higher than the set value, and when it is determined that the flow rate is higher than the set value even after the lapse of the predetermined time, the operation control unit 29 closes the fuel cutoff valve 28b and sends an abnormal flow signal to the operation operation unit 34. And the operation section 34
The user is notified of the abnormality by the display unit 35 provided in the device.
Further, the operation control unit 29 stops the driving of the liquid fuel supply device 30, and stops the combustion. In the combustion stop state,
When the output of the flow sensor 28a becomes higher than a preset value and the operation control unit 29 determines that the fuel is leaking, the fuel cutoff valve 28b is closed in the same manner as during the combustion described above, and the user is displayed on the display unit 35. Notify the abnormality.

Effect of the Invention As described above, the present invention provides a liquid fuel combustion apparatus such as an outdoor installation type which a user cannot usually see at all times, in which a flow rate sensor capable of detecting a flow rate of fuel is provided in the middle of a fuel pipe. The flow of the fuel can be always shut off before the occurrence of combustion failure due to an abnormal flow rate or unsafety due to fuel leakage at a leveler or the like in the main body in accordance with the usage state. Further, according to the second aspect of the present invention, a user can be constantly informed of a fuel leak or a combustion failure due to an abnormal flow rate, so that a measure for the abnormality can be promptly provided, and a highly reliable and safe liquid fuel combustion apparatus which is easy to use is provided. can do.

[Brief description of the drawings]

FIG. 1 is a structural view of a liquid fuel combustion apparatus showing one embodiment of the present invention, FIG. 2 is a flowchart of the same, and FIG. 3 is a structural view of a conventional liquid fuel combustion apparatus. 21: Liquid fuel combustion device main body, 22: Burner, 25: Separate tank, 26: Leveler, 27: Fuel pipe, 28a ...
Flow sensor 28b Combustion shut-off valve 29 Operation control unit 30 Liquid fuel supply device

Claims (2)

(57) [Claims] 1. A separate tank, a main body having a burner therein, a leveler provided in the main body, for storing an appropriate amount of liquid fuel supplied from the separate tank, and connecting the separate tank and the leveler. A flow sensor for liquid fuel provided in the middle of the fuel pipe, and an operation control for comparing a flow rate of the liquid fuel in the fuel pipe detected by the flow rate sensor with a flow rate limit value preset according to the combustion amount of the burner. Unit, wherein the operation control unit cuts off the flow of fuel to the burner when the flow signal from the flow sensor becomes larger than a preset flow limit value, regardless of the presence or absence of combustion of the burner. Liquid fuel combustion device. 2. A separate tank, a main body having a burner therein, and a radiator connected to the main body and installed in a room.
A leveler that is provided in the main body and stores an appropriate amount of liquid fuel in the separate tank; a liquid fuel supply device that supplies the fuel in the leveler to the burner; and a fuel pipe that connects the separate tank and the leveler. A flow sensor for liquid fuel provided in the middle, a fuel cutoff valve also provided in the middle of the fuel pipe, and a flow rate detected by the flow sensor, a flow limit value set in advance according to the combustion amount of the burner An operating control unit that closes the fuel cutoff valve when it becomes larger, and a display unit that displays a flow rate abnormality based on a fuel flow rate abnormal signal from the operation control unit. The operation control unit operates the fuel cutoff valve when the flow rate signal from the flow rate sensor becomes larger than the flow rate limit value regardless of whether the burner is burning or not, One display liquid fuel combustion apparatus for displaying it signals the unit.