JPS5812024Y2 - Safety devices for gas combustion equipment - Google Patents

Description

[Detailed description of the invention] This invention is installed in gas combustion equipment, and automatically stops the gas supply when combustion stops (misfire) due to blowout, etc., and/or when incomplete combustion occurs due to lack of oxygen. related to safety equipment.

Conventionally, an oxygen concentration battery consisting of a combusted body of an oxygen ion conductive solid electrolyte such as stabilized zirconia and a porous electrode is used as an oxygen deficiency sensor and/or a misfire sensor, and the output thereof is used as a solenoid valve for opening/closing a gas supply path. A safety device for gas combustion equipment has been proposed that opens and closes the gas combustion equipment.

However, this safety device does not work if the temperature of the oxygen concentration battery is 6.
Unless the temperature reaches about 00°C, the electromotive force required to keep the solenoid valve open will not be generated.

Therefore, when setting the safety device, it is necessary to keep the solenoid valve open by pressing the safety device setting device with a child for several tens of seconds as the temperature of the oxygen concentration battery increases and the output increases. There was an annoying drawback.

The object of the present invention is to provide a safety device for gas combustion equipment that can quickly heat up an oxygen concentration battery, thereby reducing the hassle of operating the safety device.

The present invention constructs an oxygen concentration battery by providing a porous electrode on a sintered body of an oxygen ion conductive solid electrolyte. In this state, the combustion flame becomes oxygen deficient! The other porous electrode is placed so as to be in constant contact with the oxygen-deficient combustion flame and used as an oxygen deficiency sensor and/or a misfire sensor, and the output of the oxygen concentration battery is used to connect the gas supply path. A safety device for gas combustion equipment that opens and closes a solenoid valve for opening and closing, the gist of which is the provision of a heating acceleration burner for the oxygen concentration battery that heats the oxygen concentration battery for a certain period of time after igniting the gas combustion equipment. and
Next, the present invention will be explained based on an embodiment shown in the drawings.

Fig. 1 shows a gas combustion equipment equipped with the safety device of the present invention, 1 is a panel-shaped main nozzle, 1a is a premixed air supply port, and the air supplied from the supply port 1a is supplied to the main nozzle. During normal combustion, a combustion flame of 1 burns with excess oxygen, and when the room becomes oxygen-deficient, the amount of oxygen in the air supplied from the supply port 1a decreases, resulting in a reducing flame lacking oxygen. .

2 is a burner that is installed opposite to the main crater 1 and burns in a constant oxygen-deficient state, and 2 is its combustion flame.

3 is an oxygen concentration battery placed between the main crater 1 and the burner 2 as an oxygen deficiency sensor and a misfire sensor;
b, M9os Sr'XY'203, La2O3,
zrO2, TrO2, Ce stabilized with S c20q etc.
Platinum, rhodium, palladium, or their alloys are coated in the form of a uniform porous thin film on both sides of an oxygen ion conductive solid electrolyte sintered body plate such as 02 to form an electrode. The other porous electrode is placed in contact with a combustion flame and two people.

4 is a heating acceleration burner of an oxygen concentration battery installed in parallel with the burner 2, 4A is its combustion flame, 5 is a gas supply path, 6 is a solenoid valve for opening and closing the gas supply path, 61 is its electromagnet, 62 is a coil, 63 is a movable body with a valve cover 64 fixed to its lower end; 65
is a valve port, 66 is a spring that urges the movable body 63 in the direction of the valve port 65, 7 is a valve for the acceleration burner 4, 71 is the valve, 7
2 is the valve port, 13 is a spring that biases the valve 71 in the direction of force of the valve 072, 8 is a set lever for setting the safety device, 81 is the first lever, and when the first lever 81 is pressed, it is set. The main rod 82 of the rod 8 presses the movable body 63 against the electromagnetic valve 61 and simultaneously opens the valve port 65, and the branch rod 83 pushes the valve 71 and opens the valve lower 2.

This set of safety equipment and the use of gas-burning equipment must be
At a time when the housing 81 is manually pushed to open the valve ports 65 and 72, the movable body 63 is pressed against the electromagnet 61, and at the same time, either the main nozzle 1, the burner 2 housing, or the accelerating burner 4 is ignited.

As a result, the oxygen concentration battery 1 is exposed to combustion flames IA and 2A from both sides.
and 4A, the temperature rises rapidly and the oxygen concentration ratio of the atmosphere in contact with the rainy season porous electrode increases, generating an electromotive force of about 0.8 volts, lowering the output impedance faster than before and reducing the coil 62. A current flows through the electromagnet 61, and the electromagnet 61 generates a magnetic force capable of attracting the movable body 63 against the elastic force of the spring 660.

, when the hand is removed from the housing 81, the valve lower 2 closes and the acceleration burner 4 stops combustion.

This state continues as long as the gas is burning normally, but
When the oxygen concentration in the air in the room where gas combustion equipment is used decreases, there will be no surplus oxygen in the combustion flame IA and the oxygen concentration ratio of both electrodes will decrease, so the output of the oxygen concentration battery will decrease and the movable body 63 is a valve cover 64 due to the elastic force of a spring 66.
moves to close the valve port 65, the solenoid valve 6 closes the gas supply path, and the safety device is activated.

Furthermore, even in the event of a misfire, the oxygen concentration ratio of the atmosphere in contact with both electrodes of the oxygen concentration battery decreases and the output decreases, so the solenoid valve 6 closes the gas supply path and operates as a safety device.

In the above embodiment, the accelerating burner 4 is arranged in parallel with the burner 2, and it is necessary that the combustion flame 4A of the accelerating burner 4 is always deficient in oxygen in order to generate the output of the oxygen concentration battery 3 while the accelerating burner 4 is in use.

As described above, the safety device for gas combustion equipment according to the present invention is as follows:
Since it has a heating acceleration burner, the oxygen concentration battery can be heated up quickly, and safety devices can be set up in a short time, making it convenient.

[Brief explanation of drawings]

FIG. 1 shows a schematic diagram of a safety device according to the present invention and a gas combustion appliance equipped with the safety device. In the figure, 3...Oxygen concentration battery, 4...Temperature rising acceleration burner, 6...Solenoid valve for opening/closing gas supply path.

Claims (1)

[Scope of utility model registration request] An oxygen concentration battery is constructed by providing a porous electrode on a sintered body of an oxygen ion conductive solid electrolyte, and one porous electrode of this oxygen concentration battery has an excess of oxygen during normal combustion, and an excess of oxygen when there is an oxygen deficiency indoors. The oxygen concentration battery is used as an oxygen deficiency sensor and/or a misfire sensor by being placed in contact with the oxygen-deficient combustion flame casing or its combustion gas, and the other porous electrode is placed in constant contact with the oxygen-deficient combustion flame. In the safety device for gas combustion equipment, which opens and closes the solenoid valve for opening and closing the gas supply path with the output of A safety device for gas combustion equipment characterized by: