JPH0351621A - Safety device of combustion device - Google Patents

Abstract

PURPOSE:To prevent the pollution of the inside of a room and raise safety by storing into a storage box which has a supply air cylinder in the lower section a combustion device with an exhaust gas cylinder in its upper section and the whole of a buffer device at the upper section of the exhaust gas cylinder. CONSTITUTION:When a back flow of the exhaust gas develops, it flows out of a backward wind flow-out section 10 in the direction opposite to the direction indicated by the arrow mark and goes into a box body 5. Accordingly the inside of the storage box 5 is filled with the exhaust gas, causing a shortage of oxygen in it, and a pilot burner 7 is put off right away. With this a solenoid valve 8 becomes OFF and it shuts off the supply of fuel and stops combustion. With this constitution it is possible to prevent the pollution of the inside of a room and raise safety.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a safety device for combustion appliances.

(Conventional technology and problems) There are various causes of backflow of exhaust gas, but one of them is the sealing of the house. That is, with the development of sashes and the like, houses have become hermetically sealed, and if a combustion appliance such as that shown in FIG. 1 is used in such a sealed state, there is a risk that exhaust gas may flow back into the room from the exhaust stack. For example, by enclosing a ventilation fan in a kitchen or the like, a negative pressure is created in the room, and exhaust gas flows back into the room and contaminates the room. In such a case, the present invention immediately and automatically stops combustion in the combustion appliance, thereby preventing pollution from indoor exhaust gas. (Aspect 1 of the invention) Reference numeral 1 is a combustion appliance having an exhaust pipe provided at the upper part thereof, and 2 is a baffle device provided at the upper part of the exhaust pipe 3. The combustion appliance 1 and the baffle device 2 are all housed in a storage box 5 having an air supply section 4 at the bottom. 6 is a baffle plate.

(for production) FIG. 2(A) shows a state in which exhaust is being normally exhausted.

At this time, air is flowing in from the headwind outflow section 10. The case of FIG. 2(B) shows a case where backflow occurs. In the case of FIG. 2(B), when a backflow occurs as shown by the arrow in the figure, the exhaust gas flows out from the backflow outlet 10, but
Due to its construction, the entire combustion appliance 1 including the baffle device 2 and wandering cylinder 3 flows into a box 5 in which an air supply section 4 is provided at the bottom.

Since the combustion air is contained in the exhaust gas, the storage box 5 is filled with the exhaust gas, and the pilot burner 7 is immediately extinguished. Therefore, the thermocouple ceases to act, the solenoid valve 8 is closed, and the main burner 9 is extinguished. In this way, by housing the combustion appliance 1 including the exhaust pipe 3 and the baffle device 2 in the box body 2, the supply of fuel gas can be immediately stopped.

(Effects of the Invention) As described above, the present invention can prevent indoor air pollution by adopting a unique structure that creates an exhaust gas atmosphere and stops fuel gas even if exhaust gas backflow occurs. It has excellent effects.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a conventional device, and FIGS. 2(A) and (B) are conceptual explanatory diagrams of the present invention. Code 1... Combustion appliance, 2... Baffler device, 3...
Exhaust pipe, 4... Air supply section, 5... Storage box, 6... Baffle plate, 7... Pyrosoto burner, 8... Solenoid valve, 9
...Main burner. 10... Reverse hood outflow part. Figure 1

Claims (1)

[Claims] A safety device for a combustion appliance in which a combustion appliance with an exhaust pipe provided at the top and a baffler device provided at the top of the exhaust pipe are all housed in a storage box with an air supply part provided at the bottom.