JPS62225826A - Abnormal condition sensing device for combustion equipment - Google Patents

Abstract

PURPOSE:To prevent a discharging gas from a connection part of a discharging pipe from being leaked by a method wherein an abnormal condition at a connection part of the discharging pipe is detected in response to a variation in temperature of the discharging pipe. CONSTITUTION:Keroscene is supplied into a burner 11 from a cartridge type tank 1 through an oil volume adjustor 4 or the like and ignited together with combustion air fed by an air feeding fan 16 within a combustion cylinder 10. When a connection part at discharging pipes 20 and 20A becomes an incomplete state, the discharging gas is leaked at this connection part to reduce the amount of discharging gas flowing in the discharging pipe 20 and a temperature within the discharging pipe 20 is decreased. When a temperature sensed by a temperature measuring element 27 is decreased lower than a predetermined temperature, a signal is outputted from a discriminating circuit 35 to energize a coil 34B of a relay 34, a normally closed contact point 34A is opened and the combustion control device 30 is controlled to terminate a combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to abnormality detection lA@ of a combustion appliance equipped with an exhaust pipe that discharges exhaust gas outdoors.

(Prior art) A type of combustion appliance that uses petroleum, etc. as fuel, is an air supply/exhaust pipe in which an air supply pipe that supplies outdoor air to the combustion appliance and an exhaust pipe that exhausts exhaust gas from the combustion appliance to the outside are configured concentrically. There are some with This type of combustion appliance supplies the outside air taken in through the intake pipe of the supply and exhaust pipe to the combustion section as combustion air, and exhausts the exhaust gas generated during combustion to the outside through the exhaust pipe of the supply and exhaust pipe. is configured to do so.

(Problem to be Solved by the Invention) When such a combustion appliance is used, for example, as a hot air heater, the exhaust gas is discharged outside through the exhaust pipe, so there is no problem of contamination of the campus air by the exhaust gas, making it safer. However, if the connection of the exhaust pipe is incomplete, for example, the connection between the exhaust pipe connected to the exhaust seedling where the exhaust fan is located and the exhaust pipe that makes up the supply and exhaust stack, the exhaust gas may leak from that connection. There was also the possibility that the air inside the seedlings would be contaminated by leakage, which could cause personal injury.

The present invention was made in consideration of the above circumstances, and the UL
An object of the present invention is to provide abnormality detection Ha for a combustion appliance that can prevent leakage of exhaust gas from a connecting portion of a trachea.

[Structure of the Invention] (Means for Solving Problems) The abnormality detection device for a combustion appliance of the present invention detects an abnormality in the exhaust pipe 20 when the temperature of the exhaust pipe 20 detected by the temperature measuring element 27 becomes lower than a set value. Abnormality detection means 2 that outputs a 20A connection abnormality signal
9.

(Function) When the temperature of the exhaust pipe 20 falls below the set value, the exhaust pipe 20
．． If an abnormality occurs in the connection of the 20A, a connection abnormality signal is output and combustion of the combustion appliance is stopped.

(Practical example) An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a car 1-ridge tank that is removably mounted on an oil pan provided in the main body case 2, and the oil pan has a curved surface relative to the pan 3. The structure is such that kerosene is supplied to keep the temperature constant.

Reference numeral 4 denotes an oil amount regulator installed on the base 6 of the main body case 2 via a mounting base 5, the oil receiver is connected to the tray 3 via an oil supply pipe 7 on the inlet side, and the oil receiver is connected to the tray 3 on the outlet side. It is connected to a discharge pipe 9 via a solenoid valve 8.

Reference numeral 10 denotes a combustion cylinder in which a bottom-type burner 11 is installed inside, and the burner 11 is connected to the discharge pipe 9 and is configured to be supplied with kerosene through the discharge pipe 9. Reference numeral 12 denotes an air supply pipe whose one end is connected to the lower part of the combustion tube 10, and supplies combustion air into the combustion tube 10. 13, the inlet side is L of the combustion cylinder 10.
The outlet side of the heat exchanger is connected to the exhaust pipe 14.

This is a motor that commonly drives the air supply fan 15 and the exhaust fan 17. Said exhaust fu? The inlet side of the exhaust chamber 19 of the casing 18 in which the engine is disposed is connected to the exhaust pipe 1.
4, and the outlet side is connected to supply and exhaust 1 through exhaust pipe -20A.
1!121 is connected to the inner exhaust pipe 20. The outlet side of the air supply chamber 22 of the casing 18 where the air supply fan 16 and the motor 15 are located is connected to the air supply pipe 12.
The inlet side is connected to the outer air supply pipe 23 forming the air supply/exhaust space 21 via an air supply pipe 23A. 2
A convection fan 4 is provided on the back side of the main body case 2 and is driven by a motor 25, which blows indoor air outside the main case 2 toward the heat exchanger 13 inside the main body case 2. The indoor air blown to the main body case 2 is heated here and is blown out as warm air from a vAffl outlet 26 provided on the front surface of the main body case 2.

27 is a 111I exhaust element provided in the inner exhaust pipe 20 constituting the supply/exhaust pipe 21, and this 1lII! Warm element 2
7 is connected to an abnormality detection circuit 29 which is connected to the 'Fi source circuit 28 and outputs a connection abnormality signal when the detected temperature of the temperature measuring element 27 becomes lower than a preset temperature. is connected to the combustion control device 30.

The power supply circuit 28 includes an AC power supply 31 and this AC power supply 11i.
An N current @ 32 that rectifies the alternating current of 31 is connected via a transformer 33.

The abnormality detection circuit 29 connects the combustion control device 3 to the primary winding of the transformer 33 via a normally closed contact 34A of a relay 34.
0 is connected, and a relay 34 is connected to the output terminal of the rectifier 32.
A determination circuit 35 is connected through a coil 343, and a temperature measuring element 27 is connected to this determination circuit 35 through a conductive wire 36.

In the above configuration, kerosene is supplied into the burner 11 from the cartridge tank 1 via the oil amount regulator 4 etc., and by igniting the kerosene, the combustion air is sent by the supply fan 16 into the combustion tube 10. Burns with air.

Exhaust gas generated by this combustion passes through the combustion tube 10, the heat exchanger 13, the exhaust pipe 14, and the exhaust chamber 19 in the casing 18, and is then exhausted by the exhaust fan 17 to the exhaust pipe 20△ and the supply/exhaust tube 21. It is discharged from the pipe 20 to the outside. During this time, the exhaust gas exchanges heat with the indoor air blown by the convection fan 24 in the heat exchanger 13, and its temperature is lowered and exhausted outside, but the temperature remains almost constant. Here, if the connection part to the exhaust pipe 20.20 becomes incomplete, exhaust gas leaks from this connection part, and the amount of exhaust gas flowing into the exhaust pipe 20 decreases. The temperature inside decreases. When the temperature detected by the temperature measuring element 27 becomes equal to or lower than a preset temperature, a signal is output from the determination circuit 35, energizing the coil 343 of the relay 34, and the normally closed contact 34A is opened. This controls the combustion control device 30 to stop combustion.

In this way, when the exhaust pipe 20.20A is incompletely connected, the exhaust gas leaks from the connected portion and the amount of exhaust gas flowing inside the exhaust pipe 20 is reduced, thereby setting the detected temperature detected by the temperature measuring element 27. When the temperature drops below the temperature, a connection abnormality signal is generated and combustion is stopped.J: Sea urchin (14) is made of 14 parts, so it is possible to reliably prevent indoor air pollution due to exhaust gas leakage from the connection part to the exhaust pipe 20.20. .

Note that the present invention is not limited to the above embodiments,
Various modifications are possible within the scope of the invention.

For example, in the above embodiment, outdoor air is supplied to the combustion appliance and the exhaust gas from the combustion appliance is discharged outdoors, but it is also possible to supply guide air to the combustion appliance and exhaust the exhaust gas from the combustion appliance outdoors. It's okay. Further, when a connection abnormality signal is generated, an alarm may be generated to prompt the user to extinguish the fire.

[Effects of the Invention] The present invention can provide an abnormality detection device for a combustion appliance that can prevent leakage of exhaust gas from an exhaust pipe connection portion by detecting an abnormal state of exhaust pipe connection based on a temperature change in the exhaust pipe.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing one embodiment of the present invention, and FIG. 2 is a circuit configuration diagram. 20, 20A... Exhaust pipe 27... Temperature measuring element 29.
・Anomaly detection means

Claims (1)

[Scope of Claims] A combustion appliance equipped with an exhaust pipe that discharges exhaust gas outdoors includes a temperature measuring element that detects the temperature of the exhaust pipe, and a connection of the exhaust pipe when the temperature detected by the temperature measuring element becomes below a set value. 1. An abnormality detection device for a combustion appliance, comprising abnormality detection means for outputting an abnormality signal.